National Library of Energy BETA

Sample records for land surface interaction

  1. Modeling the interaction between land surface and groundwater

    E-Print Network [OSTI]

    Nebraska-Lincoln, University of

    Modeling the interaction between land surface and groundwater Geng-Xin Ou Xun-Hong Chen School-ground water models Irrigation efficiency Materials and methods Development of SGWM #12;Background Groundwater in Nebraska. #12;Background Groundwater in Nebraska. decline 100 ft by 1980, 40 ft by 1999; 87% population

  2. SGP Cloud and Land Surface Interaction Campaign (CLASIC): Measurement Platforms

    SciTech Connect (OSTI)

    MA Miller; R Avissar; LK Berg; SA Edgerton; ML Fischer; TJ Jackson; B. Kustas; PJ Lamb; G McFarquhar; Q Min; B Schmid; MS Torn; DD Tuner

    2007-06-01

    The Cloud and Land Surface Interaction Campaign (CLASIC) will be conducted from June 8 to June 30, 2007, at the U.S. Department of Energy’s Atmospheric Radiation Measurement (ARM) Climate Research Facility (ACRF) Southern Great Plains (SGP) site. Data will be collected using eight aircraft equipped with a variety of specialized sensors, four specially instrumented surface sites, and two prototype surface radar systems. The architecture of CLASIC includes a high-altitude surveillance aircraft and enhanced vertical thermodynamic and wind profile measurements that will characterize the synoptic scale structure of the clouds and the land surface within the ACRF SGP site. Mesoscale and microscale structures will be sampled with a variety of aircraft, surface, and radar observations. An overview of the measurement platforms that will be used during the CLASIC are described in this report. The coordination of measurements, especially as it relates to aircraft flight plans, will be discussed in the CLASIC Implementation Plan.

  3. SGP Cloud and Land Surface Interaction Campaign (CLASIC): Science and Implementation Plan

    SciTech Connect (OSTI)

    MA Miller; R Avissar; LK Berg; SA Edgerton; ML Fischer; T Jackson; B.Kustas; PJ Lamb; GM McFarquhar; Q Min; B Schmid; MS Torn; DD Turner

    2007-06-30

    The Cloud and Land Surface Interaction Campaign is a field experiment designed to collect a comprehensive data set that can be used to quantify the interactions that occur between the atmosphere, biosphere, land surface, and subsurface. A particular focus will be on how these interactions modulate the abundance and characteristics of small and medium size cumuliform clouds that are generated by local convection. These interactions are not well understood and are responsible for large uncertainties in global climate models, which are used to forecast future climate states. The campaign will be conducted from June 8 to June 30, 2007, at the U.S. Department of Energy’s Atmospheric Radiation Measurement Climate Research Facility Southern Great Plains site. Data will be collected using eight aircraft equipped with a variety of specialized sensors, four specially instrumented surface sites, and two prototype surface radar systems. The architecture of Cloud and Land Surface Interaction Campaign includes a high-altitude surveillance aircraft and enhanced vertical thermodynamic and wind profile measurements that will characterize the synoptic scale structure of the clouds and the land surface within the Atmospheric Radiation Measurement Climate Research Facility Southern Great Plains site. Mesoscale and microscale structures will be sampled with a variety of aircraft, surface, and radar observations.

  4. Land-atmosphere interactions in an high resolution atmospheric simulation coupled with a surface data assimilation scheme

    E-Print Network [OSTI]

    Entekhabi, Dara

    A valid tool for the retrieving of the turbulent fluxes that characterize the surface energy budget is constituted by the remote sensing of land surface states. In this study sequences of satellite-derived observations ...

  5. Estimation of turbulent surface heat fluxes using sequences of remotely sensed land surface temperature

    E-Print Network [OSTI]

    Bateni, Sayed Mohyeddin

    2011-01-01

    Fluxes of heat and moisture at the land-surface play a significant role in the climate system. These fluxes interact with the overlying atmosphere and influence the characteristics of the planetary boundary layer (e.g. ...

  6. Relative efficiency of land surface energy balance components

    E-Print Network [OSTI]

    Bateni, S. M.

    [1] The partitioning of available energy into dissipative fluxes over land surfaces is dependent on the state variable of the surface energy balance (land surface temperature) and the state variable of the surface water ...

  7. Interaction effects of climate and land use/land cover change on soil organic carbon sequestration

    E-Print Network [OSTI]

    Grunwald, Sabine

    Interaction effects of climate and land use/land cover change on soil organic carbon sequestration carbon sequestration Climate change Soil carbon change Historically, Florida soils stored the largest in Florida (FL) have acted as a sink for carbon (C) over the last 40 years. · Climate interacting with land

  8. CARBON SEQUESTRATION ON SURFACE MINE LANDS

    SciTech Connect (OSTI)

    Donald H. Graves; Christopher Barton; Richard Sweigard; Richard Warner

    2003-10-30

    The 2002-2003 Department of Energy plantings amounted to 164 acres containing 111,520 tree seedlings in eastern and western Kentucky. Data gathered on these trees included an inventory to determine survival of all planted species. A sub-sample of seedlings was selected to assess the height and diameter of individual species of seedlings established. Additional efforts involved collection of soil sample and litter samples, analysis of herbaceous ground cover from vegetation clip plots and leaf area on each tree species, and development of tissue collections. All areas were sampled for penetration resistance, penetration depth (or depth to refusal), and bulk density at various depths. Rain fall events and flow rates were recorded. The water quality of runoff samples involved the determination of total and settleable solids and particle size distribution. A study was initiated that will focus on the colonization of small mammals from forest edges to various areas located on reclaimed surface mines. This effort will provide a better understanding of the role small mammals and birds have in the establishment of plant communities on mine lands that will be useful in developing and improving reclamation techniques.

  9. Carbon Sequestration on Surface Mine Lands

    SciTech Connect (OSTI)

    Donald Graves; Christopher Barton; Richard Sweigard; Richard Warner; Carmen Agouridis

    2006-03-31

    Since the implementation of the federal Surface Mining Control and Reclamation Act of 1977 (SMCRA) in May of 1978, many opportunities have been lost for the reforestation of surface mines in the eastern United States. Research has shown that excessive compaction of spoil material in the backfilling and grading process is the biggest impediment to the establishment of productive forests as a post-mining land use (Ashby, 1998, Burger et al., 1994, Graves et al., 2000). Stability of mine sites was a prominent concern among regulators and mine operators in the years immediately following the implementation of SMCRA. These concerns resulted in the highly compacted, flatly graded, and consequently unproductive spoils of the early post-SMCRA era. However, there is nothing in the regulations that requires mine sites to be overly compacted as long as stability is achieved. It has been cultural barriers and not regulatory barriers that have contributed to the failure of reforestation efforts under the federal law over the past 27 years. Efforts to change the perception that the federal law and regulations impede effective reforestation techniques and interfere with bond release must be implemented. Demonstration of techniques that lead to the successful reforestation of surface mines is one such method that can be used to change perceptions and protect the forest ecosystems that were indigenous to these areas prior to mining. The University of Kentucky initiated a large-scale reforestation effort to address regulatory and cultural impediments to forest reclamation in 2003. During the three years of this project 383,000 trees were planted on over 556 acres in different physiographic areas of Kentucky (Table 1, Figure 1). Species used for the project were similar to those that existed on the sites before mining was initiated (Table 2). A monitoring program was undertaken to evaluate growth and survival of the planted species as a function of spoil characteristics and reclamation practice. In addition, experiments were integrated within the reforestation effort to address specific questions pertaining to sequestration of carbon (C) on these sites.

  10. ORIGINAL PAPER Comparing land surface phenology derived from satellite

    E-Print Network [OSTI]

    Small, Eric

    ORIGINAL PAPER Comparing land surface phenology derived from satellite and GPS network microwave, a normalized mi- crowave reflectance index (NMRI) derived from GPS base station measurements is sensitive, and their derived SOS metrics for a subset of 24 homogenous land cover sites to investigate VOD and NMRI

  11. Probability distributions of land surface wind speeds over North America

    E-Print Network [OSTI]

    Dai, Aiguo

    Probability distributions of land surface wind speeds over North America Yanping He,1 Adam Hugh of the probability distributions of surface wind speeds (SWS) is essential for surface flux estimation, wind power estimation, and wind risk assessments. The two-parameter Weibull distribution is the most widely used

  12. Multiobjective calibration and sensitivity of a distributed land surface water and energy balance model

    E-Print Network [OSTI]

    Houser, Paul R; Gupta, Hoshin V; Shuttleworth, W. James; Famiglietti, James S

    2001-01-01

    distributed land surface water and energy balance model Pauldistributed land surface water and energy balance model (because models of water and energy balance, Ph.D.

  13. MAPPING HIGH-RESOLUTION LAND SURFACE RADIATIVE FLUXES FROM MODIS

    E-Print Network [OSTI]

    Liang, Shunlin

    Chapter 6 MAPPING HIGH-RESOLUTION LAND SURFACE RADIATIVE FLUXES FROM MODIS: ALGORITHMS.1007/978-1-4419-0050-0_6, #12;142 Mapping Radiative Fluxes There are several global radiative flux data sets derived from either. For example, the CERES team uses the predefined albedo and emissivity maps to calculate surface radiative

  14. Sensitivity of global tropical climate to land surface processes: Mean state and interannual variability

    SciTech Connect (OSTI)

    Ma, Hsi-Yen; Xiao, Heng; Mechoso, C. R.; Xue, Yongkang

    2013-03-01

    This study examines the sensitivity of global tropical climate to land surface processes (LSP) using an atmospheric general circulation model both uncoupled (with prescribed SSTs) and coupled to an oceanic general circulation model. The emphasis is on the interactive soil moisture and vegetation biophysical processes, which have first order influence on the surface energy and water budgets. The sensitivity to those processes is represented by the differences between model simulations, in which two land surface schemes are considered: 1) a simple land scheme that specifies surface albedo and soil moisture availability, and 2) the Simplified Simple Biosphere Model (SSiB), which allows for consideration of interactive soil moisture and vegetation biophysical process. Observational datasets are also employed to assess the reality of model-revealed sensitivity. The mean state sensitivity to different LSP is stronger in the coupled mode, especially in the tropical Pacific. Furthermore, seasonal cycle of SSTs in the equatorial Pacific, as well as ENSO frequency, amplitude, and locking to the seasonal cycle of SSTs are significantly modified and more realistic with SSiB. This outstanding sensitivity of the atmosphere-ocean system develops through changes in the intensity of equatorial Pacific trades modified by convection over land. Our results further demonstrate that the direct impact of land-atmosphere interactions on the tropical climate is modified by feedbacks associated with perturbed oceanic conditions ("indirect effect" of LSP). The magnitude of such indirect effect is strong enough to suggest that comprehensive studies on the importance of LSP on the global climate have to be made in a system that allows for atmosphere-ocean interactions.

  15. Afforestation in China cools local land surface temperature

    E-Print Network [OSTI]

    Myneni, Ranga B.

    Afforestation in China cools local land surface temperature Shu-Shi Penga , Shilong Piaoa,b,1) and to increase nighttime LST by about 0.2 ± 0.5 °C, on aver- age. The observed daytime cooling is a result of increased evapo- transpiration. The nighttime warming is found to increase with latitude and decrease

  16. Water balance in the amazon basin from a land surface model ensemble

    E-Print Network [OSTI]

    2014-01-01

    land surface and Earth system models. J. Hydro- meteor. ,of the Community Earth System Model (CESM; Vertenstein et

  17. The glacier and land ice surface topography interferometer: An airborne proof-of-concept demonstration of high-precision Ka-band single-pass elevation mapping

    E-Print Network [OSTI]

    2011-01-01

    and Land Ice Surface Topography Interferometer (GLISTIN): AAND LAND ICE SURFACE TOPOGRAPHY INTERFEROMETER application,”AND LAND ICE SURFACE TOPOGRAPHY INTERFEROMETER Fig. 2.

  18. MODELING LAND SURFACE PROCESSES IN SHORT-TERM WEATHER AND CLIMATE STUDIES

    E-Print Network [OSTI]

    Yang, Zong-Liang

    , glaciers, inland water, mountains, animals, human beings, their shelters, and much more. Land surface@mail.utexas.edu Website: www.geo.utexas.edu/climate (Manuscript received 31 January 2003) Land exchanges momentum, energy, water, aerosols, carbon dioxide and other trace gases with its overlying atmosphere. The land surface

  19. On the connection between continental-scale land surface processes and the tropical climate in a coupled ocean-atmosphere-land system

    SciTech Connect (OSTI)

    Ma, Hsi-Yen; Mechoso, C. R.; Xue, Yongkang; Xiao, Heng; Neelin, David; Ji, Xuan

    2013-11-15

    The impact of global tropical climate to perturbations in land surface processes (LSP) are evaluated using perturbations given by different LSP representations of continental-scale in a global climate model that includes atmosphere-ocean interactions. One representation is a simple land scheme, which specifies climatological albedos and soil moisture availability. The other representation is the more comprehensive Simplified Simple Biosphere Model, which allows for interactive soil moisture and vegetation biophysical processes. The results demonstrate that LSP processes such as interactive soil moisture and vegetation biophysical processes have strong impacts on the seasonal mean states and seasonal cycles of global precipitation, clouds, and surface air temperature. The impact is especially significant over the tropical Pacific. To explore the mechanisms for such impact, different LSP representations are confined to selected continental-scale regions where strong interactions of climate-vegetation biophysical processes are present. We find that the largest impact is mainly from LSP perturbations over the tropical African continent. The impact is through anomalous convective heating in tropical Africa due to changes in the surface heat fluxes, which in turn affect basinwide teleconnections in the Pacific through equatorial wave dynamics. The modifications in the equatorial Pacific climate are further enhanced by strong air-sea coupling between surface wind stress and upwelling, as well as effect of ocean memory. Our results further suggest that correct representations of land surface processes, land use change and the associated changes in the deep convection over tropical Africa are crucial to reducing the uncertainty when performing future climate projections under different climate change scenarios.

  20. Waterfowl habitats on reclaimed surface mined lands in southwestern Illinois

    SciTech Connect (OSTI)

    O'Leary, W.G.; Klimstra, W.D.; Nawrot, J.R.

    1984-12-01

    Loss of quality wetland habitat is probably the most important factor affecting populations of waterfowl in the United States. To counteract this problem programs for protecting critical habitats have been established and research for innovative methods to create wetlands are being pursued. Recently, attention has been given to evaluation of wetland habitats on lands surface-mined and to methods of reclamation to enhance their development as part of future planning. These data indicate quality wetland habitats can be a legitimate aspect of reclaimed surface-mined lands; and selective overburden handling, grading so as to maximize biologically productive zones and selective plantings contribute importantly to their value. Currently bond release criteria by the Illinois regulatory authority for wildlife habitat and developed water resources discourages reclamation that would maximize quality wetland habitats. Suggested changes in these criteria include alternative vegetation requirements for wetland habitats, more leniency on seasonally inundated shallow water areas, and variation from topsoil requirements when adequate unconsolidated substitute material is available. It is believed that such allowances would result in incentives for the industry to develop wetland habitats so vital to continued enjoyment of waterfowl resources.

  1. A Painting Interface for Interactive Surface Deformations

    E-Print Network [OSTI]

    A Painting Interface for Interactive Surface Deformations Jason Lawrence a Thomas Funkhouser a a with a painting interface that gives the user direct, local control over a physical simulation. The "paint" a user- locity, the user can effect surface deformations. We have found that this painting metaphor gives

  2. Optimal Use of Groundwater and Surface Water to Reduce Land Subsidence 

    E-Print Network [OSTI]

    Acosta-Gonzalez, G.; Reddell, D. L.

    1980-01-01

    Optimal Use of Groundwater and Surface Water to Reduce Land Subsidence G. Acosta-Gonzalez D.L. Reddell Texas Water Resources Institute Texas A&M University ...

  3. Validating MODIS land surface temperature products using long-term nighttime ground measurements

    E-Print Network [OSTI]

    Liang, Shunlin

    Validating MODIS land surface temperature products using long-term nighttime ground measurements, provides multiple land surface temperature (LST) products on a daily basis. However, these products have LST products, MOD11_L2 (version 4) and MOD07_L2 (version 4), using the FLUXNET and Carbon Europe

  4. Land use regulation and intraregional population-employment interaction

    E-Print Network [OSTI]

    Kim, JH; Hewings, GJD

    2013-01-01

    Levine J (2006) Zoned out: Regulation, markets, and choicesprices, externalities, and regulation in U.S. metropolitanCT (2000) Land use regulation and new construction. Regional

  5. The Probability Distribution of Land Surface Wind Speeds ADAM H. MONAHAN AND YANPING HE

    E-Print Network [OSTI]

    He, Yanping

    , the Netherlands, and Los Alamos, New Mexico, demonstrate that lower-tropospheric wind speeds become moreThe Probability Distribution of Land Surface Wind Speeds ADAM H. MONAHAN AND YANPING HE School surface wind speeds is characterized using a global network of observations. Daytime surface wind speeds

  6. Coupling the high-complexity land surface model ACASA to the mesoscale model WRF

    E-Print Network [OSTI]

    Pyles, R. D.

    In this study, the Weather Research and Forecasting (WRF) model is coupled with the Advanced Canopy–Atmosphere–Soil Algorithm (ACASA), a high-complexity land surface model. Although WRF is a state-of-the-art regional ...

  7. Impact of Agricultural Practice on Regional Climate in a Coupled Land Surface Mesoscale Model

    E-Print Network [OSTI]

    Cooley, H.S.; Riley, W.J.; Torn, M.S.; He, Y.

    2004-01-01

    winter wheat belt on the mesoscale environment, Monthlygeneration Penn State/NCAR mesoscale model (MM5), NCAR,in a Coupled Land Surface Mesoscale Model H.S. Cooley Energy

  8. Coupling the High Complexity Land Surface Model ACASA to the Mesoscale Model WRF

    E-Print Network [OSTI]

    Xu, L.

    In this study, the Weather Research and Forecasting Model (WRF) is coupled with the Advanced Canopy-Atmosphere-Soil Algorithm (ACASA), a high complexity land surface model. Although WRF is a state-of-the-art regional ...

  9. Impacts of feral hogs on reclaimed surface-mined lands in eastern Texas: a management perspective 

    E-Print Network [OSTI]

    Mersinger, Robert C.

    1999-01-01

    During the last decade, surface lignite mines in eastern Texas have experienced damage to reclaimed lands by feral hogs (Sus scrota). Specifically, feral hogs have caused damage to vegetative plantings used in the reclamation ...

  10. Interactions among bioenergy feedstock choices, landscape dynamics, and land use

    SciTech Connect (OSTI)

    Dale, Virginia H [ORNL; Kline, Keith L [ORNL; Wright, Lynn L [ORNL; Perlack, Robert D [ORNL; Downing, Mark [ORNL; Graham, Robin Lambert [ORNL

    2011-01-01

    Landscape implications of bioenergy feedstock choices are significant and depend on land-use practices and their environmental impacts. Although land-use changes and carbon emissions associated with bioenergy feedstock production are dynamic and complicated, lignocellulosic feedstocks may offer opportunities that enhance sustainability when compared to other transportation fuel alternatives. For bioenergy sustainability, major drivers and concerns revolve around energy security, food production, land productivity, soil carbon and erosion, greenhouse gas emissions, biodiversity, air quality, and water quantity and quality. The many implications of bioenergy feedstock choices require several indicators at multiple scales to provide a more complete accounting of effects. Ultimately, the long-term sustainability of bioenergy feedstock resources (as well as food supplies) throughout the world depends on land-use practices and landscape dynamics. Land-management decisions often invoke trade-offs among potential environmental effects and social and economic factors as well as future opportunities for resource use. The hypothesis being addressed in this paper is that sustainability of bioenergy feedstock production can be achieved via appropriately designed crop residue and perennial lignocellulosic systems. We find that decision makers need scientific advancements and adequate data that both provide quantitative and qualitative measures of the effects of bioenergy feedstock choices at different spatial and temporal scales and allow fair comparisons among available options for renewable liquid fuels.

  11. Human-automation interaction for lunar landing aimpoint redesignation

    E-Print Network [OSTI]

    Needham, Jennifer M

    2008-01-01

    Human-automation interactions are a critical area of research in systems with modem automation. The decision-making portion of tasks presents a special challenge for human-automation interactions because of the many factors ...

  12. Exact three-dimensional spectral solution to surface-groundwater interactions with arbitrary surface topography

    E-Print Network [OSTI]

    surface topography Anders Wo¨rman,1 Aaron I. Packman,2 Lars Marklund,1 Judson W. Harvey,3 and Susa H. [1] It has been long known that land surface topography governs both groundwater flow patterns that the surface topography can be separated in a Fourier-series spectrum that provides an exact solution

  13. Diurnal-seasonal and weather-related variations of land surface temperature observed from geostationary satellites

    E-Print Network [OSTI]

    Vinnikov, Konstantin

    Surface Temperature (SST) monitoring using infrared observations from NOAA satellites is relatively easy temperature from a satellite is possible only for cloudless sky, such monitoring is an important componentDiurnal-seasonal and weather-related variations of land surface temperature observed from

  14. Link between land-ocean warming contrast and surface relative humidities in simulations with coupled climate models

    E-Print Network [OSTI]

    Byrne, Michael Patrick

    Simulations of warming climates with coupled climate models exhibit strong land-ocean contrasts in changes in surface temperature and relative humidity, but little land-ocean contrast in changes in equivalent potential ...

  15. ARM - Field Campaign - Cloud LAnd Surface Interaction Campaign (CLASIC)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode Design to Improve4AJ01) (See22,Microphysical Properties

  16. ARM - Cloud and Land Surface Interaction Campaign (CLASIC)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Comments? We would love to hear from you! Send us agovInstrumentswrf-chem Comments? We Outreach HomeTwistCampaign

  17. SGP Cloud and Land Surface Interaction Campaign (CLASIC)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) byMultidayAlumni > The2/01/12 Page 1 of 24Department2/01/123 SGP Cloud

  18. Improving parameter estimation and water table depth simulation in a land surface model using GRACE water storage and estimated base flow data

    E-Print Network [OSTI]

    Lo, Min-Hui; Famiglietti, James S; Yeh, P. J.-F.; Syed, T. H

    2010-01-01

    spatially variable water and energy balance processes, Waterdistributed land surface water and energy balance model, J.

  19. Land Surface Model Data Assimilation for Atmospheric Prediction

    E-Print Network [OSTI]

    Walker, Jeff

    predictions from different models even when using the same parameters, inputs, and initial conditions (Houser remote sensing studies, using visible, thermal infrared (surface temperature) and microwave (passive and active) electromagnetic radiation. Of these, passive microwave soil moisture measurement has been

  20. Stable water isotope simulation by current land-surface schemes:Results of IPILPS phase 1

    SciTech Connect (OSTI)

    Henderson-Sellers, A.; Fischer, M.; Aleinov, I.; McGuffie, K.; Riley, W.J.; Schmidt, G.A.; Sturm, K.; Yoshimura, K.; Irannejad, P.

    2005-10-31

    Phase 1 of isotopes in the Project for Intercomparison of Land-surface Parameterization Schemes (iPILPS) compares the simulation of two stable water isotopologues ({sup 1}H{sub 2} {sup 18}O and {sup 1}H{sup 2}H{sup 16}O) at the land-atmosphere interface. The simulations are off-line, with forcing from an isotopically enabled regional model for three locations selected to offer contrasting climates and ecotypes: an evergreen tropical forest, a sclerophyll eucalypt forest and a mixed deciduous wood. Here we report on the experimental framework, the quality control undertaken on the simulation results and the method of intercomparisons employed. The small number of available isotopically-enabled land-surface schemes (ILSSs) limits the drawing of strong conclusions but, despite this, there is shown to be benefit in undertaking this type of isotopic intercomparison. Although validation of isotopic simulations at the land surface must await more, and much more complete, observational campaigns, we find that the empirically-based Craig-Gordon parameterization (of isotopic fractionation during evaporation) gives adequately realistic isotopic simulations when incorporated in a wide range of land-surface codes. By introducing two new tools for understanding isotopic variability from the land surface, the Isotope Transfer Function and the iPILPS plot, we show that different hydrological parameterizations cause very different isotopic responses. We show that ILSS-simulated isotopic equilibrium is independent of the total water and energy budget (with respect to both equilibration time and state), but interestingly the partitioning of available energy and water is a function of the models' complexity.

  1. Physical Mechanisms of Interaction of Cold Plasma with Polymer Surfaces

    E-Print Network [OSTI]

    Bormashenko, Edward; Multanen, Victor; Shulzinger, Evgeny; Chaniel, Gilad

    2015-01-01

    Physical mechanisms of the interaction of cold plasmas with organic surfaces are discussed. Trapping of plasma ions by the CH2 groups of polymer surfaces resulting in their electrical charging is treated. Polyethylene surfaces were exposed to the cold radiofrequency air plasma for different intervals of time. The change in the wettability of these surfaces was registered. The experimentally established characteristic time scales of the interaction of cold plasma with polymer surfaces are inversely proportional to the concentration of ions. The phenomenological kinetic model of the electrical charging of polymer surfaces by plasmas is introduced and analyzed.

  2. Impact of Agricultural Practice on Regional Climate in a CoupledLand Surface Mesoscale Model

    SciTech Connect (OSTI)

    Cooley, H.S.; Riley, W.J.; Torn, M.S.; He, Y.

    2004-07-01

    The land surface has been shown to form strong feedbacks with climate due to linkages between atmospheric conditions and terrestrial ecosystem exchanges of energy, momentum, water, and trace gases. Although often ignored in modeling studies, land management itself may form significant feedbacks. Because crops are harvested earlier under drier conditions, regional air temperature, precipitation, and soil moisture, for example, affect harvest timing, particularly of rain-fed crops. This removal of vegetation alters the land surface characteristics and may, in turn, affect regional climate. We applied a coupled climate(MM5) and land-surface (LSM1) model to examine the effects of early and late winter wheat harvest on regional climate in the Department of Energy Atmospheric Radiation Measurement (ARM) Climate Research Facility in the Southern Great Plains, where winter wheat accounts for 20 percent of the land area. Within the winter wheat region, simulated 2 m air temperature was 1.3 C warmer in the Early Harvest scenario at mid-day averaged over the two weeks following harvest. Soils in the harvested area were drier and warmer in the top 10 cm and wetter in the 10-20 cm layer. Midday soils were 2.5 C warmer in the harvested area at mid-day averaged over the two weeks following harvest. Harvest also dramatically altered latent and sensible heat fluxes. Although differences between scenarios diminished once both scenarios were harvested, the short-term impacts of land management on climate were comparable to those from land cover change demonstrated in other studies.

  3. A Subbasin-based framework to represent land surface processes in an Earth System Model

    SciTech Connect (OSTI)

    Tesfa, Teklu K.; Li, Hongyi; Leung, Lai-Yung R.; Huang, Maoyi; Ke, Yinghai; Sun, Yu; Liu, Ying

    2014-05-20

    Realistically representing spatial heterogeneity and lateral land surface processes within and between modeling units in earth system models is important because of their implications to surface energy and water exchange. The traditional approach of using regular grids as computational units in land surface models and earth system models may lead to inadequate representation of lateral movements of water, energy and carbon fluxes, especially when the grid resolution increases. Here a new subbasin-based framework is introduced in the Community Land Model (CLM), which is the land component of the Community Earth System Model (CESM). Local processes are represented assuming each subbasin as a grid cell on a pseudo grid matrix with no significant modifications to the existing CLM modeling structure. Lateral routing of water within and between subbasins is simulated with the subbasin version of a recently-developed physically based routing model, Model for Scale Adaptive River Routing (MOSART). As an illustration, this new framework is implemented in the topographically diverse region of the U.S. Pacific Northwest. The modeling units (subbasins) are delineated from high-resolution Digital Elevation Model while atmospheric forcing and surface parameters are remapped from the corresponding high resolution datasets. The impacts of this representation on simulating hydrologic processes are explored by comparing it with the default (grid-based) CLM representation. In addition, the effects of DEM resolution on parameterizing topography and the subsequent effects on runoff processes are investigated. Limited model evaluation and comparison showed that small difference between the averaged forcing can lead to more significant difference in the simulated runoff and streamflow because of nonlinear horizontal processes. Topographic indices derived from high resolution DEM may not improve the overall water balance, but affect the partitioning between surface and subsurface runoff. More systematic analyses are needed to determine the relative merits of the subbasin representation compared to the commonly used grid-based representation, especially when land surface models are approaching higher resolutions.

  4. Evaluation of "all weather" microwave-derived land surface temperatures with in situ CEOP measurements

    E-Print Network [OSTI]

    Evaluation of "all weather" microwave-derived land surface temperatures with in situ CEOP conditions. Ts estimates from infrared satellite observations can only be derived under clear sky. Passive from Special Sensor Microwave/Imager measurements, with a spatial resolution of 0.25° × 0.25°, at least

  5. Retrieving snow mass from GRACE terrestrial water storage change with a land surface model

    E-Print Network [OSTI]

    Yang, Zong-Liang

    Retrieving snow mass from GRACE terrestrial water storage change with a land surface model Guo snow water equivalent (SWE) product is critical for climate and hydrology studies in Arctic regions changes in terrestrial water storage (TWS), of which snow mass is the primary component in winter Arctic

  6. Are deep-ocean-generated surface-wave microseisms observed on land?

    E-Print Network [OSTI]

    Gerstoft, Peter

    Are deep-ocean-generated surface-wave microseisms observed on land? Peter D. Bromirski,1 Ralph A generate a pressure excitation pulse at twice the ocean wave frequency that excites pseudo-Rayleigh (pRg) wave DF microseisms. pRg generated in shallow coastal waters have most of their energy in the solid

  7. The effect of soil hydraulic properties vs. soil texture in land surface models

    E-Print Network [OSTI]

    Small, Eric

    The effect of soil hydraulic properties vs. soil texture in land surface models E. D. Gutmann and E and difficulties in scaling existing data. In particular, the spatial distribution of Soil Hydraulic Properties to determine SHPs. Citation: Gutmann, E. D., and E. E. Small (2005), The effect of soil hydraulic properties vs

  8. Fluorocarbons: Surface Free Energies and van der Waals Interaction

    E-Print Network [OSTI]

    Chan, Derek Y C

    Letters Fluorocarbons: Surface Free Energies and van der Waals Interaction Calum J. Drummond surface free energies based on contact angle measurements with dispersive organic liquids depend of dispersive materials, the surface free energy per unit area of a solid organic material can be used

  9. Quantifying and relating land-surface and subsurface variability in permafrost environments using lidar and surface geophsical datasets

    SciTech Connect (OSTI)

    Hubbard, Susan S [Lawrence Berkeley National Laboratory (LBNL); Gangodagmage, C [Los Alamos National Laboratory (LANL); Dafflon, B [Lawrence Berkeley National Laboratory (LBNL); Wainwright, H [Lawrence Berkeley National Laboratory (LBNL); Peterson, J [Lawrence Berkeley National Laboratory (LBNL); Gusmeroli, A [University of Alaska, Fairbanks; Ulrich, Craig [Lawrence Berkeley National Laboratory (LBNL); Wu, Yuxin [Lawrence Berkeley National Laboratory (LBNL); Wilson, Cathy [Los Alamos National Laboratory (LANL); Rowland, J [Los Alamos National Laboratory (LANL); Tweedie, Craig [University of Texas, El Paso; Wullschleger, Stan D [ORNL

    2013-01-01

    The complexity of permafrost dynamics and its critical impact on climate feedbacks warrant continued development of advanced high-latitude terrestrial ecosystem characterization and monitoring approaches. In this study, we explore the value of remote sensing and surface geophysical data for characterizing land surface and subsurface properties and their linkages in an Alaskan Coastal Plain ecosystem. We base our study on data collected at the end of the 2011 growing season in the Barrow Environmental Observatory, where a nested suite of measurements were collected within a polygon-dominated region including: surface ground penetrating radar, electromagnetic, and electrical resistance tomography data; thaw depth, soil temperature and moisture content, soil texture, soil carbon and nitrogen content, and major and trace cations. Previously-collected lidar data were also available for the study. Analysis of the datasets, individually and in combination, revealed the utility of the methods for characterizing critical land-surface and subsurface properties and associated spatial zonation. Lidar analysis was performed to extract geomorphic metrics (such as slope, curvature, and directed distance of polygons), which potentially indicate drainage potential and permafrost deformation state. Cluster analysis of these lidar-obtained attributes suggested that the land surface can be grouped into three spatially coherent zones, each having a dominant geomorphic expression including: a high centered polygon zone, a low centered polygon zone and a transitional zone. Comparison of the geophysical attributes from radar, electrical resistance tomography, and electromagnetic data with point measurements suggests that the surface geophysical data can provide very high-resolution information about subsurface properties that affect ecosystem feedbacks to climate, such as thaw depth and moisture content. Cluster analysis suggested that the geophysical attributes also varied spatially in a systematic way, suggesting the presence of three laterally distinct subsurface zones. Analysis of zone-based subsurface point measurements suggests that the geophysically-defined zones have unique distributions of hydrological, thermal, and geochemical properties and that the subsurface (geophysically-based) and land-surface (lidar-based) zonation is consistent. Although the close linkage between land surface (polygonal geomorphology) and subsurface (active layer) variability revealed through our study is not surprising, to our knowledge this is the first study to document such relationships using high resolution and non-invasive approaches. This study suggests the potential of using coincident lidar and surface geophysical measurements to quantify land surface and subsurface properties (respectively) and their linkages, which are likely to play a role in terrestrial ecosystem evolution and feedbacks to climate. These findings open the way for future research focused on using combined geophysical and remote sensing datasets to estimate subsurface and land-surface properties in high resolution and over large regions as is needed for process understanding and numerical model initialization in high latitude terrestrial ecosystems.

  10. B. Decharme H. Douville Introduction of a sub-grid hydrology in the ISBA land surface model

    E-Print Network [OSTI]

    B. Decharme Æ H. Douville Introduction of a sub-grid hydrology in the ISBA land surface model spa- tial scales. This paper focuses on the parameterization of sub-grid hydrological processes within the ISBA land surface model. Five off-line simulations are performed over the French Rho^ ne river basin

  11. Charge Retention by Gold Clusters on Surfaces Prepared Using Soft Landing of Mass Selected Ions

    SciTech Connect (OSTI)

    Johnson, Grant E.; Priest, Thomas A.; Laskin, Julia

    2012-01-24

    Monodisperse gold clusters have been prepared on surfaces in different charge states through soft landing of mass-selected ions. Ligand-stabilized gold clusters were prepared in methanol solution by reduction of chloro(triphenylphosphine)gold(I) with borane tert-butylamine complex in the presence of 1,3-bis(diphenylphosphino)propane. Electrospray ionization was used to introduce the clusters into the gas-phase and mass-selection was employed to isolate a single ionic cluster species (Au11L53+, L = 1,3-bis(diphenylphosphino)propane) which was delivered to surfaces at well controlled kinetic energies. Using in-situ time of flight secondary ion mass spectrometry (TOF-SIMS) it is demonstrated that the Au11L53+ cluster retains its 3+ charge state when soft landed onto the surface of a 1H,1H,2H,2H-

  12. Surface-controlled deuterium-palladium interactions

    SciTech Connect (OSTI)

    Wampler, W.R.; Richards, P.M. )

    1990-04-15

    Measurements were made of the uptake of deuterium (D) into traps within the bulk of palladium, and the release of D back to the gas phase. The study was done with bare metal surfaces under UHV conditions using a novel method based on ion-beam analysis. The D uptake rate was proportional to gas pressure and about a factor of 3 less than the rate of impingement onto the surface from the gas. The release of D was limited by molecular recombination at the surface. A model for surface-limited release of D is presented which shows how the difference in energy between D in traps and recombination sites is a critical parameter in determining the time dependence of the D release. The observed kinetics of the D release from Pd lead to the conclusion that D in recombination sites is less strongly bound than D in traps which in turn is less strongly bound than D in the low-coverage surface chemisorption sites. Molecular recombination must therefore occur from sites with weaker binding, while the low-coverage chemisorption sites with stronger binding are nearly fully occupied, but do not contribute significantly to the release because of the strong binding.

  13. Interactive Multiresolution Surface Viewing Andrew Certainz

    E-Print Network [OSTI]

    Washington at Seattle, University of

    proposed as a basic tool supporting com- pression, progressive transmission, and level-of-detail control David Salesin Werner Stuetzley Department of Computer Science and Engineering Department of Mathematics of machine characteristics and load, and interactive choice of tradeoff between the amount of detail in ge

  14. Geochemistry of Surface-Atmosphere Interactions on

    E-Print Network [OSTI]

    Withers, Paul

    , T, and atmospheric composition ¥ ...Kinetics ¥ What are the major minerals? ¥ What is the oxidation of terrestrial alkaline igneous rocks #12;Oxidation State of the Surface ¥ 2CO + O2 = 2CO2 controls O2 ¥ Lack. ¥ S in lower atmosphere is kinetically controlled ¥ CaCO3 + SO2 = CaSO4 + CO removes SO2 , deposits CaSO4 ¥ Fe

  15. The role of land surface processes on the mesoscale simulation of the July 26, 2005 heavy rain event over Mumbai, India

    E-Print Network [OSTI]

    Niyogi, Dev

    The role of land surface processes on the mesoscale simulation of the July 26, 2005 heavy rain Mesoscale convection Weather research and forecast model Indian summer monsoon Land surface processes

  16. In Situ SIMS and IR Spectroscopy of Well-Defined Surfaces Prepared by Soft Landing of Mass-Selected Ions

    SciTech Connect (OSTI)

    Johnson, Grant E.; Gunaratne, Kalupathirannehelage Don D.; Laskin, Julia

    2014-06-16

    Soft landing of mass-selected ions onto surfaces is a powerful approach for the highly-controlled preparation of materials that are inaccessible using conventional synthesis techniques. Coupling soft landing with in situ characterization using secondary ion mass spectrometry (SIMS) and infrared reflection absorption spectroscopy (IRRAS) enables analysis of well-defined surfaces under clean vacuum conditions. The capabilities of three soft-landing instruments constructed in our laboratory are illustrated for the representative system of surface-bound organometallics prepared by soft landing of mass-selected ruthenium tris(bipyridine) dications, [Ru(bpy)3]2+, onto carboxylic acid terminated self-assembled monolayer surfaces on gold (COOH-SAMs). In situ time-of-flight (TOF)-SIMS provides insight into the reactivity of the soft-landed ions. In addition, the kinetics of charge reduction, neutralization and desorption occurring on the COOH-SAM both during and after ion soft landing are studied using in situ Fourier transform ion cyclotron resonance (FT-ICR)-SIMS measurements. In situ IRRAS experiments provide insight into how the structure of organic ligands surrounding metal centers is perturbed through immobilization of organometallic ions on COOH-SAM surfaces by soft landing. Collectively, the three instruments provide complementary information about the chemical composition, reactivity and structure of well-defined species supported on surfaces.

  17. Land Use and Wildfire: A Review of Local Interactions and Teleconnections

    E-Print Network [OSTI]

    Kelly, Maggi

    2015-01-01

    to coordinate land change and fire management across largeof land use change and fire management—Such as land useland use change through fire management. Often, increased

  18. Urban and land surface effects on the 30 July 2003 mesoscale convective system event observed in the southern Great Plains

    E-Print Network [OSTI]

    Niyogi, Dev

    Urban and land surface effects on the 30 July 2003 mesoscale convective system event observed/Atmosphere Mesoscale Prediction System (COAMPS 1 ) to investigate the impact of urban and land vegetation processes on the prediction of the mesoscale convective system (MCS) observed on 30 July 2003 in the vicinity of Oklahoma City

  19. How can we use MODIS land surface temperature to validate long-term urban model simulations?

    E-Print Network [OSTI]

    Hu, Leiqiu; Brunsell, Nathaniel A.; Monaghan, Andrew J.; Barlage, Michael; Wilhelmi, Olga V.

    2014-03-27

    performed over metropolitan Houston for 2003–2012, preceded by a 1 year (2002) “spin-up” period to allow the soil temperature and moisture states to equilibrate [Chen et al., 2007]. The upper boundary conditions for HRLDAS were derived from one-eighth degree... hourly meteorological data from the North American Land Data Assimilation Phase 2 (NLDAS-2) [Cosgrove et al., 2003; Xia et al., 2012] forcing data set. It was assumed that watering and irrigation was applied to all vegetated surfaces, a process...

  20. Evaluation of land ownership, lease status, and surface features in five geopressured geothermal prospects

    SciTech Connect (OSTI)

    Hackenbracht, W.N.

    1981-05-01

    This study was accomplished for the purpose of gathering information pertaining to land and lease ownership, surface features and use and relevant environmental factors in the Lake Theriot (West and East), Kaplan, Bayou Hebert and Freshwater Bayou geopressured geothermal prospects in Louisiana, and the Blessing geopressured geothermal prospect in Texas. This information and recommendations predicated upon it will then be used to augment engineering and geological data utilized to select geopressured geothermal test well sites within the prospects. The five geopressured geothermal prospects are briefly described and recommendations given.

  1. Tribological interaction between polytetrafluoroethylene and silicon oxide surfaces

    SciTech Connect (OSTI)

    Uçar, A.; Çopuro?lu, M.; Suzer, S.; Baykara, M. Z.; Ar?kan, O.

    2014-10-28

    We investigated the tribological interaction between polytetrafluoroethylene (PTFE) and silicon oxide surfaces. A simple rig was designed to bring about a friction between the surfaces via sliding a piece of PTFE on a thermally oxidized silicon wafer specimen. A very mild inclination (?0.5°) along the sliding motion was also employed in order to monitor the tribological interaction in a gradual manner as a function of increasing contact force. Additionally, some patterns were sketched on the silicon oxide surface using the PTFE tip to investigate changes produced in the hydrophobicity of the surface, where the approximate water contact angle was 45° before the transfer. The nature of the transferred materials was characterized by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). XPS results revealed that PTFE was faithfully transferred onto the silicon oxide surface upon even at the slightest contact and SEM images demonstrated that stable morphological changes could be imparted onto the surface. The minimum apparent contact pressure to realize the PTFE transfer is estimated as 5 kPa, much lower than reported previously. Stability of the patterns imparted towards many chemical washing processes lead us to postulate that the interaction is most likely to be chemical. Contact angle measurements, which were carried out to characterize and monitor the hydrophobicity of the silicon oxide surface, showed that upon PTFE transfer the hydrophobicity of the SiO{sub 2} surface could be significantly enhanced, which might also depend upon the pattern sketched onto the surface. Contact angle values above 100° were obtained.

  2. Ciliary contact interactions dominate surface scattering of swimming eukaryotes

    E-Print Network [OSTI]

    Vasily Kantsler; Jörn Dunkel; Marco Polin; Raymond E. Goldstein

    2013-01-17

    Interactions between swimming cells and surfaces are essential to many microbiological processes, from bacterial biofilm formation to human fertilization. However, in spite of their fundamental importance, relatively little is known about the physical mechanisms that govern the scattering of flagellated or ciliated cells from solid surfaces. A more detailed understanding of these interactions promises not only new biological insights into structure and dynamics of flagella and cilia, but may also lead to new microfluidic techniques for controlling cell motility and microbial locomotion, with potential applications ranging from diagnostic tools to therapeutic protein synthesis and photosynthetic biofuel production. Due to fundamental differences in physiology and swimming strategies, it is an open question whether microfluidic transport and rectification schemes that have recently been demonstrated for pusher-type microswimmers such as bacteria and sperm cells, can be transferred to puller-type algae and other motile eukaryotes, as it is not known whether long-range hydrodynamic or short-range mechanical forces dominate the surface interactions of these microorganisms. Here, using high-speed microscopic imaging, we present direct experimental evidence that the surface scattering of both mammalian sperm cells and unicellular green algae is primarily governed by direct ciliary contact interactions. Building on this insight, we predict and verify experimentally the existence of optimal microfluidic ratchets that maximize rectification of initially uniform Chlamydomonas reinhardtii suspensions. Since mechano-elastic properties of cilia are conserved across eukaryotic species, we expect that our results apply to a wide range of swimming microorganisms.

  3. A Painting Interface for Interactive Surface Deformations Jason Lawrence

    E-Print Network [OSTI]

    A Painting Interface for Interactive Surface Deformations Jason Lawrence Princeton University. In this paper, we investigate combining these two approaches with a painting interface that gives the user direct, local control over a physical sim- ulation. The "paint" a user applies to the model defines its

  4. A Physically Based Runoff Routing Model for Land Surface and Earth System Models

    SciTech Connect (OSTI)

    Li, Hongyi; Wigmosta, Mark S.; Wu, Huan; Huang, Maoyi; Ke, Yinghai; Coleman, Andre M.; Leung, Lai-Yung R.

    2013-06-13

    A new physically based runoff routing model, called the Model for Scale Adaptive River Transport (MOSART), has been developed to be applicable across local, regional, and global scales. Within each spatial unit, surface runoff is first routed across hillslopes and then discharged along with subsurface runoff into a ‘‘tributary subnetwork’’ before entering the main channel. The spatial units are thus linked via routing through the main channel network, which is constructed in a scale-consistent way across different spatial resolutions. All model parameters are physically based, and only a small subset requires calibration.MOSART has been applied to the Columbia River basin at 1/ 168, 1/ 88, 1/ 48, and 1/ 28 spatial resolutions and was evaluated using naturalized or observed streamflow at a number of gauge stations. MOSART is compared to two other routing models widely used with land surface models, the River Transport Model (RTM) in the Community Land Model (CLM) and the Lohmann routing model, included as a postprocessor in the Variable Infiltration Capacity (VIC) model package, yielding consistent performance at multiple resolutions. MOSART is further evaluated using the channel velocities derived from field measurements or a hydraulic model at various locations and is shown to be capable of producing the seasonal variation and magnitude of channel velocities reasonably well at different resolutions. Moreover, the impacts of spatial resolution on model simulations are systematically examined at local and regional scales. Finally, the limitations ofMOSART and future directions for improvements are discussed.

  5. Surface Water Chemistry in White Oak Creek, North-East Texas: Effect of Land Use 

    E-Print Network [OSTI]

    Watson, Eliza

    2012-02-14

    Over the last few decades increasing attention has been paid to the effects of land use activities and land management on stream water quality. Recent research has largely focused on dominant land uses such as urban development and agricultural...

  6. Modeling the Summertime Climate of Southwest Asia: The Role of Land Surface Processes in Shaping the Climate of Semiarid Regions

    E-Print Network [OSTI]

    Marcella, Marc P.

    Presented is a study on the role of land surface processes in determining the summertime climate over the semiarid region of southwest Asia. In this region, a warm surface air temperature bias of 3.5°C is simulated in the ...

  7. Combined surface solar brightening and increasing greenhouse effect support recent intensification of the global land-based hydrological cycle

    E-Print Network [OSTI]

    Fischlin, Andreas

    Combined surface solar brightening and increasing greenhouse effect support recent intensification of the global land-based hydrological cycle Martin Wild,1 Ju¨rgen Grieser,2 and Christoph Scha¨r1 Received 30 radiation (surface radiation balance) is the key driver behind the global hydrological cycle. Here we

  8. Fundamental to the Cloud Land Surface Interaction Campaign (CLASIC) is understanding the relationships of the atmosphere and the land surface

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journal Article)Forthcoming UpgradesArea: PADD 1Assessmentwith emphasis

  9. Forecasting the response of Earth's surface to future climatic and land use changes: A review of methods and research needs

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Pelletier, Jon D.; Murray, A. Brad; Pierce, Jennifer L.; Bierman, Paul R.; Breshears, David D.; Crosby, Benjamin T.; Ellis, Michael; Foufoula-Georgiou, Efi; Heimsath, Arjun M.; Houser, Chris; et al

    2015-07-14

    In the future, Earth will be warmer, precipitation events will be more extreme, global mean sea level will rise, and many arid and semiarid regions will be drier. Human modifications of landscapes will also occur at an accelerated rate as developed areas increase in size and population density. We now have gridded global forecasts, being continually improved, of the climatic and land use changes (C&LUC) that are likely to occur in the coming decades. However, besides a few exceptions, consensus forecasts do not exist for how these C&LUC will likely impact Earth-surface processes and hazards. In some cases, we havemore »the tools to forecast the geomorphic responses to likely future C&LUC. Fully exploiting these models and utilizing these tools will require close collaboration among Earth-surface scientists and Earth-system modelers. This paper assesses the state-of-the-art tools and data that are being used or could be used to forecast changes in the state of Earth's surface as a result of likely future C&LUC. We also propose strategies for filling key knowledge gaps, emphasizing where additional basic research and/or collaboration across disciplines are necessary. The main body of the paper addresses cross-cutting issues, including the importance of nonlinear/threshold-dominated interactions among topography, vegetation, and sediment transport, as well as the importance of alternate stable states and extreme, rare events for understanding and forecasting Earth-surface response to C&LUC. Five supplements delve into different scales or process zones (global-scale assessments and fluvial, aeolian, glacial/periglacial, and coastal process zones) in detail.« less

  10. Forecasting the response of Earth's surface to future climatic and land use changes: A review of methods and research needs: FORECASTING EARTH'S SURFACE RESPONSE

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Pelletier, Jon D.; Brad Murray, A.; Pierce, Jennifer L.; Bierman, Paul R.; Breshears, David D.; Crosby, Benjamin T.; Ellis, Michael; Foufoula-Georgiou, Efi; Heimsath, Arjun M.; Houser, Chris; et al

    2015-07-14

    In the future, Earth will be warmer, precipitation events will be more extreme, global mean sea level will rise, and many arid and semiarid regions will be drier. Human modifications of landscapes will also occur at an accelerated rate as developed areas increase in size and population density. We now have gridded global forecasts, being continually improved, of the climatic and land use changes (C&LUC) that are likely to occur in the coming decades. However, besides a few exceptions, consensus forecasts do not exist for how these C&LUC will likely impact Earth-surface processes and hazards. In some cases, we havemore »the tools to forecast the geomorphic responses to likely future C&LUC. Fully exploiting these models and utilizing these tools will require close collaboration among Earth-surface scientists and Earth-system modelers. This paper assesses the state-of-the-art tools and data that are being used or could be used to forecast changes in the state of Earth's surface as a result of likely future C&LUC. We also propose strategies for filling key knowledge gaps, emphasizing where additional basic research and/or collaboration across disciplines are necessary. The main body of the paper addresses cross-cutting issues, including the importance of nonlinear/threshold-dominated interactions among topography, vegetation, and sediment transport, as well as the importance of alternate stable states and extreme, rare events for understanding and forecasting Earth-surface response to C&LUC. Five supplements delve into different scales or process zones (global-scale assessments and fluvial, aeolian, glacial/periglacial, and coastal process zones) in detail.« less

  11. Surface interactions involved in flashover with high density electronegative gases.

    SciTech Connect (OSTI)

    Hodge, Keith Conquest; Warne, Larry Kevin; Jorgenson, Roy Eberhardt; Wallace, Zachariah Red; Lehr, Jane Marie

    2010-01-01

    This report examines the interactions involved with flashover along a surface in high density electronegative gases. The focus is on fast ionization processes rather than the later time ionic drift or thermalization of the discharge. A kinetic simulation of the gas and surface is used to examine electron multiplication and includes gas collision, excitation and ionization, and attachment processes, gas photoionization and surface photoemission processes, as well as surface attachment. These rates are then used in a 1.5D fluid ionization wave (streamer) model to study streamer propagation with and without the surface in air and in SF6. The 1.5D model therefore includes rates for all these processes. To get a better estimate for the behavior of the radius we have studied radial expansion of the streamer in air and in SF6. The focus of the modeling is on voltage and field level changes (with and without a surface) rather than secondary effects, such as, velocities or changes in discharge path. An experiment has been set up to carry out measurements of threshold voltages, streamer velocities, and other discharge characteristics. This setup includes both electrical and photographic diagnostics (streak and framing cameras). We have observed little change in critical field levels (where avalanche multiplication sets in) in the gas alone versus with the surface. Comparisons between model calculations and experimental measurements are in agreement with this. We have examined streamer sustaining fields (field which maintains ionization wave propagation) in the gas and on the surface. Agreement of the gas levels with available literature is good and agreement between experiment and calculation is good also. Model calculations do not indicate much difference between the gas alone versus the surface levels. Experiments have identified differences in velocity between streamers on the surface and in the gas alone (the surface values being larger).

  12. Water balance in the Amazon basin from a land surface model ensemble

    SciTech Connect (OSTI)

    Getirana, Augusto; Dutra, Emanuel; Guimberteau, Matthieu; Kam, Jonghun; Li, Hongyi; Decharme, Bertrand; Zhang, Zhengqiu J.; Ducharne, Agnes; Boone, Aaron; Balsamo, Gianpaolo; Rodell, Matthew; Mounirou Toure, Ally; Xue, Yongkang; Peters-Lidard, Christa D.; Kumar, Sujay V.; Arsenault, Kristi Rae; Drapeau, Guillaume; Leung, Lai-Yung R.; Ronchail, Josyane; Sheffield, Justin

    2014-12-06

    Despite recent advances in modeling and remote sensing of land surfaces, estimates of the global water budget are still fairly uncertain. The objective of this study is to evaluate the water budget of the Amazon basin based on several state-of-the-art land surface model (LSM) outputs. Water budget variables [total water storage (TWS), evapotranspiration (ET), surface runoff (R) and baseflow (B)] are evaluated at the basin scale using both remote sensing and in situ data. Fourteen LSMs were run using meteorological forcings at a 3-hourly time step and 1-degree spatial resolution. Three experiments are performed using precipitation which has been rescaled to match monthly global GPCP and GPCC datasets and the daily HYBAM dataset for the Amazon basin. R and B are used to force the Hydrological Modeling and Analysis Platform (HyMAP) river routing scheme and simulated discharges are compared against observations at 165 gauges. Simulated ET and TWS are compared against FLUXNET and MOD16A2 evapotranspiration, and GRACE TWS estimates in different catchments. At the basin scale, simulated ET ranges from 2.39mm.d-1 to 3.26mm.d-1 and a low spatial correlation between ET and P indicates that evapotranspiration does not depend on water availability over most of the basin. Results also show that other simulated water budget variables vary significantly as a function of both the LSM and precipitation used, but simulated TWS generally agree at the basin scale. The best water budget simulations resulted from experiments using the HYBAM dataset, mostly explained by a denser rainfall gauge network the daily rescaling.

  13. Quarterly Journal of the Royal Meteorological Society Q. J. R. Meteorol. Soc. 137: 690699, April 2011 A A Tool to Estimate Land-Surface Emissivities at Microwave

    E-Print Network [OSTI]

    Aires, Filipe

    2011 A A Tool to Estimate Land-Surface Emissivities at Microwave frequencies (TELSEM) for use and the Queen's Printer for Scotland. A Tool to Estimate Land Surface Emissivities at Microwave frequencies of the microwave surface emissivity to improve the retrieval of atmospheric profiles or the direct assimilation

  14. Gas-Surface Interaction If we want to solve the Boltzmann equation, we need to specify

    E-Print Network [OSTI]

    Alexeenko, Alina

    Gas-Surface Interaction If we want to solve the Boltzmann equation, we need to specify boundary molecules interact with a solid surface. In other words, we need to have a model of gas-surface interaction molecules. We will treat collisions as instantaneous and local. Accurate modeling of gas surface

  15. Toward A National Early Warning System for Forest Disturbances Using Remotely Sensed Land Surface Phenology

    SciTech Connect (OSTI)

    HargroveJr., William Walter; Spruce, Joe; Gasser, Gerry; Hoffman, Forrest M

    2009-12-01

    We are using a statistical clustering method for delineating homogeneous ecoregions as a basis for identifying disturbances in forests through time over large areas, up to national and global extents. Such changes can be shown relative to past conditions, or can be predicted relative to present conditions, as with forecasts of future climatic change. This quantitative ecoregion approach can be used to predict destinations for populations whose local environments are forecast to become unsuitable and are forced to migrate as their habitat shifts, and is also useful for predicting the susceptibility of new locations to invasive species like Sudden Oak Death. EFETAC and our sister western center WWETAC, along with our NASA and ORNL collaborators, are designing a new national-scale early warning system for forest threats, called FIRST. Envisioned as a change-detection system, FIRST will identify all land surface cover changes at the MODIS observational scale, and then try to discriminate normal, expected seasonal changes from locations having unusual activity that may represent potential forest threats. As a start, we have developed new national data sets every 16 days from 2002 through 2008, based on land surface phenology, or timing of leaf-out in the spring and brown-down in the fall. Changes in such phenological maps will be shown to contain important information about vegetation health status across the United States. The standard deviation of the duration of fall can be mapped, showing places where length of fall is relatively constant or is variable in length from year to year.

  16. Use of land surface remotely sensed satellite and airborne data for environmental exposure assessment in cancer research

    E-Print Network [OSTI]

    cancer and environmental contaminants, focusing primarily on agricultural chemical exposure assessmentUse of land surface remotely sensed satellite and airborne data for environmental exposure assessment in cancer research SUSAN K. MAXWELLa , JAYMIE R. MELIKERb AND PIERRE GOOVAERTSc a U.S. Geological

  17. 316 IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 46, NO. 2, FEBRUARY 2008 Land Surface Emissivity Retrieval From

    E-Print Network [OSTI]

    Plaza, Antonio J.

    Emissivity Retrieval From Different VNIR and TIR Sensors José A. Sobrino, Juan C. Jiménez-Muñoz, Guillem operational algorithms for land surface emissivity () retrieval from different operational satellite) the temperature and emissivity separation algorithm, which retrieves only from TIR data and 2) the normalized

  18. Land surface skin temperatures from a combined analysis of microwave and infrared satellite observations for an all-weather

    E-Print Network [OSTI]

    Aires, Filipe

    Land surface skin temperatures from a combined analysis of microwave and infrared satellite Microwave/Imager (SSM/I) and International Satellite Cloud Climatology Project (ISCCP) data. In the absence all the expected variations with solar flux, soil characteristics, and cloudiness. During daytime

  19. Enhancing Drinking Water Supply by Better Understanding Surface Water Ground Water Interaction

    E-Print Network [OSTI]

    Rhode Island, University of

    Enhancing Drinking Water Supply by Better Understanding Surface Water ­ Ground Water Interaction Primary Investigators Thomas Boving Anne Veeger Patricia Logan #12;Enhancing Drinking Water Supply by Better Understanding Surface Water ­ Ground Water Interaction Thomas Boving, Anne Veeger & Patricia Logan

  20. Q&A on "Impacts of Wind Farms on Land Surface Temperature" Published by Nature Climate Change on April 29, 2012

    E-Print Network [OSTI]

    Zhou, Liming

    1 Q&A on "Impacts of Wind Farms on Land Surface Temperature" Published by Nature Climate Change? This study presents the first observational evidence of wind farm impacts on land surface temperature downwind of wind farms. Why do the operating wind turbines warm nighttime temperature? This warming effect

  1. Evaluating a New Deposition Velocity Module in the Noah Land-Surface Model

    E-Print Network [OSTI]

    2010-01-01

    Bio-hydro-atmosphere interactions of energy, aerosols,Bio-hydro-atmosphere interactions of Energy, Aerosols,

  2. Land Use and Wildfire: A Review of Local Interactions and Teleconnections

    E-Print Network [OSTI]

    Kelly, Maggi

    2015-01-01

    R.A. , Sr. Land use and climate change. Science 2005, 310,change contributes to climate change, which in turns impacts

  3. Wildfire Risk Mapping over the State of Mississippi: Land Surface Modeling Approach

    SciTech Connect (OSTI)

    Cooke, William H. [Mississippi State University (MSU); Mostovoy, Georgy [Mississippi State University (MSU); Anantharaj, Valentine G [ORNL; Jolly, W. Matt [USDA Forest Service

    2012-01-01

    Three fire risk indexes based on soil moisture estimates were applied to simulate wildfire probability over the southern part of Mississippi using the logistic regression approach. The fire indexes were retrieved from: (1) accumulated difference between daily precipitation and potential evapotranspiration (P-E); (2) top 10 cm soil moisture content simulated by the Mosaic land surface model; and (3) the Keetch-Byram drought index (KBDI). The P-E, KBDI, and soil moisture based indexes were estimated from gridded atmospheric and Mosaic-simulated soil moisture data available from the North American Land Data Assimilation System (NLDAS-2). Normalized deviations of these indexes from the 31-year mean (1980-2010) were fitted into the logistic regression model describing probability of wildfires occurrence as a function of the fire index. It was assumed that such normalization provides more robust and adequate description of temporal dynamics of soil moisture anomalies than the original (not normalized) set of indexes. The logistic model parameters were evaluated for 0.25 x0.25 latitude/longitude cells and for probability representing at least one fire event occurred during 5 consecutive days. A 23-year (1986-2008) forest fires record was used. Two periods were selected and examined (January mid June and mid September December). The application of the logistic model provides an overall good agreement between empirical/observed and model-fitted fire probabilities over the study area during both seasons. The fire risk indexes based on the top 10 cm soil moisture and KBDI have the largest impact on the wildfire odds (increasing it by almost 2 times in response to each unit change of the corresponding fire risk index during January mid June period and by nearly 1.5 times during mid September-December) observed over 0.25 x0.25 cells located along the state of Mississippi Coast line. This result suggests a rather strong control of fire risk indexes on fire occurrence probability over this region.

  4. Interaction of graphene quantum dots with bulk semiconductor surfaces

    SciTech Connect (OSTI)

    Mohapatra, P. K.; Singh, B. P.; Kushavah, Dushyant; Mohapatra, J.

    2015-05-15

    Highly luminescent graphene quantum dots (GQDs) are synthesized through thermolysis of glucose. The average lateral size of the synthesized GQDs is found to be ?5 nm. The occurrence of D and G band at 1345 and 1580 cm{sup ?1} in Raman spectrum confirms the presence of graphene layers. GQDs are mostly consisting of 3 to 4 graphene layers as confirmed from the AFM measurements. Photoluminescence (PL) measurement shows a distinct broadening of the spectrum when GQDs are on the semiconducting bulk surface compared to GQDs in water. The time resolved PL measurement shows a significant shortening in PL lifetime due to the substrate interaction on GQDs compared to the GQDs in solution phase.

  5. Utilizing CLASIC observations and multiscale models to study the impact of improved Land surface representation on modeling cloud- convection

    SciTech Connect (OSTI)

    Niyogi, Devdutta S.

    2013-06-07

    The CLASIC experiment was conducted over the US southern great plains (SGP) in June 2007 with an objective to lead an enhanced understanding of the cumulus convection particularly as it relates to land surface conditions. This project was design to help assist with understanding the overall improvement of land atmosphere convection initiation representation of which is important for global and regional models. The study helped address one of the critical documented deficiency in the models central to the ARM objectives for cumulus convection initiation and particularly under summer time conditions. This project was guided by the scientific question building on the CLASIC theme questions: What is the effect of improved land surface representation on the ability of coupled models to simulate cumulus and convection initiation? The focus was on the US Southern Great Plains region. Since the CLASIC period was anomalously wet the strategy has been to use other periods and domains to develop the comparative assessment for the CLASIC data period, and to understand the mechanisms of the anomalous wet conditions on the tropical systems and convection over land. The data periods include the IHOP 2002 field experiment that was over roughly same domain as the CLASIC in the SGP, and some of the DOE funded Ameriflux datasets.

  6. Mechanism of surface modification in the plasma-surface interaction in electrical arcs CERN, CH-1211 Genve 23, Switzerland

    E-Print Network [OSTI]

    Nordlund, Kai

    Mechanism of surface modification in the plasma-surface interaction in electrical arcs H. Timko received 22 February 2010; published 25 May 2010 Electrical sparks and arcs are plasma discharges the given conditions in the plasma sheath to kiloelectron volt energies, on surfaces. The flux in arcs is so

  7. Ecosystem feedbacks to climate change in California: Development, testing, and analysis using a coupled regional atmosphere and land-surface model (WRF3-CLM3.5)

    SciTech Connect (OSTI)

    Subin, Z.M.; Riley, W.J.; Kueppers, L.M.; Jin, J.; Christianson, D.S.; Torn, M.S.

    2010-11-01

    A regional atmosphere model [Weather Research and Forecasting model version 3 (WRF3)] and a land surface model [Community Land Model, version 3.5 (CLM3.5)] were coupled to study the interactions between the atmosphere and possible future California land-cover changes. The impact was evaluated on California's climate of changes in natural vegetation under climate change and of intentional afforestation. The ability of WRF3 to simulate California's climate was assessed by comparing simulations by WRF3-CLM3.5 and WRF3-Noah to observations from 1982 to 1991. Using WRF3-CLM3.5, the authors performed six 13-yr experiments using historical and future large-scale climate boundary conditions from the Geophysical Fluid Dynamics Laboratory Climate Model version 2.1 (GFDL CM2.1). The land-cover scenarios included historical and future natural vegetation from the Mapped Atmosphere-Plant-Soil System-Century 1 (MC1) dynamic vegetation model, in addition to a future 8-million-ha California afforestation scenario. Natural vegetation changes alone caused summer daily-mean 2-m air temperature changes of -0.7 to +1 C in regions without persistent snow cover, depending on the location and the type of vegetation change. Vegetation temperature changes were much larger than the 2-m air temperature changes because of the finescale spatial heterogeneity of the imposed vegetation change. Up to 30% of the magnitude of the summer daily-mean 2-m air temperature increase and 70% of the magnitude of the 1600 local time (LT) vegetation temperature increase projected under future climate change were attributable to the climate-driven shift in land cover. The authors projected that afforestation could cause local 0.2-1.2 C reductions in summer daily-mean 2-m air temperature and 2.0-3.7 C reductions in 1600 LT vegetation temperature for snow-free regions, primarily because of increased evapotranspiration. Because some of these temperature changes are of comparable magnitude to those projected under climate change this century, projections of climate and vegetation change in this region need to consider these climate-vegetation interactions.

  8. Sensitivity of Surface Flux Simulations to Hydrologic Parameters Based on an Uncertainty Quantification Framework Applied to the Community Land Model

    SciTech Connect (OSTI)

    Hou, Zhangshuan; Huang, Maoyi; Leung, Lai-Yung R.; Lin, Guang; Ricciuto, Daniel M.

    2012-08-10

    Uncertainties in hydrologic parameters could have significant impacts on the simulated water and energy fluxes and land surface states, which will in turn affect atmospheric processes and the carbon cycle. Quantifying such uncertainties is an important step toward better understanding and quantification of uncertainty of integrated earth system models. In this paper, we introduce an uncertainty quantification (UQ) framework to analyze sensitivity of simulated surface fluxes to selected hydrologic parameters in the Community Land Model (CLM4) through forward modeling. Thirteen flux tower footprints spanning a wide range of climate and site conditions were selected to perform sensitivity analyses by perturbing the parameters identified. In the UQ framework, prior information about the parameters was used to quantify the input uncertainty using the Minimum-Relative-Entropy approach. The quasi-Monte Carlo approach was applied to generate samples of parameters on the basis of the prior pdfs. Simulations corresponding to sampled parameter sets were used to generate response curves and response surfaces and statistical tests were used to rank the significance of the parameters for output responses including latent (LH) and sensible heat (SH) fluxes. Overall, the CLM4 simulated LH and SH show the largest sensitivity to subsurface runoff generation parameters. However, study sites with deep root vegetation are also affected by surface runoff parameters, while sites with shallow root zones are also sensitive to the vadose zone soil water parameters. Generally, sites with finer soil texture and shallower rooting systems tend to have larger sensitivity of outputs to the parameters. Our results suggest the necessity of and possible ways for parameter inversion/calibration using available measurements of latent/sensible heat fluxes to obtain the optimal parameter set for CLM4. This study also provided guidance on reduction of parameter set dimensionality and parameter calibration framework design for CLM4 and other land surface models under different hydrologic and climatic regimes.

  9. The derivative expansion approach to the interaction between close surfaces

    E-Print Network [OSTI]

    C. D. Fosco; F. C. Lombardo; F. D. Mazzitelli

    2014-06-18

    The derivative expansion approach to the calculation of the interaction between two surfaces, is a generalization of the proximity force approximation, a technique of widespread use in different areas of physics. The derivative expansion has so far been applied to seemingly unrelated problems in different areas; it is our principal aim here to present the approach in its full generality. To that end, we introduce an unified setting, which is independent of any particular application, provide a formal derivation of the derivative expansion in that general setting, and study some its properties. With a view on the possible application of the derivative expansion to other areas, like nuclear and colloidal physics, we also discuss the relation between the derivative expansion and some time-honoured uncontrolled approximations used in those contexts. By putting them under similar terms as the derivative expansion, we believe that the path is open to the calculation of next to leading order corrections also for those contexts. We also review some results obtained within the derivative expansion, by applying it to different concrete examples and highlighting some important points.

  10. Influence of plasma surface interactions on tokamak startup

    SciTech Connect (OSTI)

    Goswami, Rajiv [Institute for Plasma Research, Bhat, Gandhinagar 382428 (India)] [Institute for Plasma Research, Bhat, Gandhinagar 382428 (India)

    2013-08-15

    The startup phase of a tokamak is a complex phenomenon involving burnthrough of the low-Z impurities and rampup of I{sub p}, the plasma current. The design considerations of a tokamak are closely connected with the startup modeling. Plasma evolution is analysed using a zero-dimensional model. The particle and energy balance is considered of two subclasses of plasmas which are penetrable by neutral gas, together with another component, neutrals trapped in the wall. The first subclass includes plasmas being penetrated by slow neutrals of (?few eV) temperature. The second includes plasmas being penetrated only by fast neutrals having a temperature comparable to that of the ions. The impact of impurities on energy balance is considered through their generation by ion induced desorption of adsorbed oxygen on the first wall and physical and chemical sputtering of carbon. The paper demonstrates self-consistently that the evolution of initial phase of the discharge is intimately linked to the condition of the plasma facing components (PFCs) and the resultant plasma surface interactions.

  11. 13.022 Surface Waves and their Interaction With Floating Bodies, Spring 2002

    E-Print Network [OSTI]

    Sclavounos, Paul D.

    Introduces the physics and mathematical modeling of linear and nonlinear surface wave interactions with floating bodies, e.g., ships and offshore platforms. Surface wave theory, including linear and nonlinear effects in a ...

  12. The Influence of Boundary Layer Processes on the Diurnal Variation of the Climatological Near-Surface Wind Speed Probability Distribution over Land*

    E-Print Network [OSTI]

    He, Yanping

    -Surface Wind Speed Probability Distribution over Land* YANPING HE School of Earth and Ocean Sciences wind speed probability distribution is essential for surface flux estimation and wind power management. Global observations indicate that the surface wind speed probability density function (PDF

  13. Druggable Protein Interaction Sites Are More Predisposed to Surface Pocket Formation than the Rest of the Protein Surface

    E-Print Network [OSTI]

    Johnson, David K.; Karanicolas, John

    2013-03-07

    in conformations containing surface pockets suitable for small molecule binding. Starting from a set of seven unbound protein structures, we find that the presence of low-energy pocket-containing conformations is indeed a signature of druggable protein interaction...

  14. Comparison of avian species diversity and densities on non-mined and reclaimed surface-mined land in east-central Texas 

    E-Print Network [OSTI]

    Wenzel, Dawn Nicole

    2006-10-30

    -1 COMPARISON OF AVIAN SPECIES DIVERSITY AND DENSITIES ON NON-MINED AND RECLAIMED SURFACE-MINED LAND IN EAST-CENTRAL TEXAS A Thesis by DAWN NICOLE WENZEL Submitted to the Office of Graduate Studies of Texas A... ON NON-MINED AND RECLAIMED SURFACE-MINED LAND IN EAST-CENTRAL TEXAS A Thesis by DAWN NICOLE WENZEL Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements...

  15. Quantifying the thermodynamic entropy budget of the land surface: is this useful?

    E-Print Network [OSTI]

    Brunsell, Nathaniel A.; Schymanski, S.J.; Kleidon, A.

    2011-06-20

    .: Thermodynamics and optimality of the water budget on land: A review, Geophys. Res. Lett., 35, 1–6, doi:10.1029/2008GL035393, 2008. LeMone, M. A., Chen, F., Alfieri, J. G., Tewari, M., Geerts, B., Miao, Q., Grossman, R. L., and Coulter, R. L.: Influ- ence of land... cover and soil moisture on the horizontal distribu- tion of sensible and latent heat fluxes in southeast Kansas dur- ing IHOP 2002 and CASES-97, J. Hydrometeorol., 8, 68–87, doi:10.1175/JHM554.1, 2007. LeMone, M. A., Tewari, M., Chen, F., Alfieri, J. G...

  16. Assimilation of Remotely Sensed Snow Observations into the NSIPP Land Surface Model

    E-Print Network [OSTI]

    Walker, Jeff

    Walker, UMBC-GEST/Hydrological Sciences Branch, cejpw@land.gsfc.nasa.gov Paul Houser and James Foster, Laboratory for Hydrospheric Processes NASA/GSFC, Paul.Houser@gsfc.nasa.gov, jfoster with observations. 2. Snow observation data Dr Foster has commenced work on the processing of SMMR and SSM/I passive

  17. Land Use and Wildfire: A Review of Local Interactions and Teleconnections

    E-Print Network [OSTI]

    Kelly, Maggi

    2015-01-01

    fuel loads, and once again management. The overall impact ofmanagement. Land use changes also influence fire ignition frequency and fuel loads andloads and ignition are often good indicators of fire risk, this relationship can also be complicated through fire suppression, fuels management

  18. Gas-surface interaction and boundary conditions for the Boltzmann equation

    E-Print Network [OSTI]

    Mieussens, Luc

    Gas-surface interaction and boundary conditions for the Boltzmann equation St´ephane Brull, Pierre Equation. The interaction between the wall atoms and the gas molecules within a thin surface layer of the gas in the bulk flow. Boundary conditions are formally derived from this model by using classical

  19. MODELING GROUNDWATER-SURFACE WATER INTERACTIONS IN AN OPERATIONAL SETTING BY LINKING RIVERWARE WITH MODFLOW

    E-Print Network [OSTI]

    of groundwater-surface water interactions is critical to modeling low river flow periods in riparian environments in the semi-arid southwestern United States. This thesis presents a modeling tool with significant potential to modeling groundwater-surface interactions in riparian zones, including riparian evapotranspiration

  20. Coverage Dependent Charge Reduction of Cationic Gold Clusters on Surfaces Prepared Using Soft Landing of Mass-selected Ions

    SciTech Connect (OSTI)

    Johnson, Grant E.; Priest, Thomas A.; Laskin, Julia

    2012-11-29

    The ionic charge state of monodisperse cationic gold clusters on surfaces may be controlled by selecting the coverage of mass-selected ions soft landed onto a substrate. Polydisperse diphosphine-capped gold clusters were synthesized in solution by reduction of chloro(triphenylphosphine)gold(I) with borane tert-butylamine in the presence of 1,3-bis(diphenylphosphino)propane. The polydisperse gold clusters were introduced into the gas phase by electrospray ionization and mass selection was employed to select a multiply charged cationic cluster species (Au11L53+, m/z = 1409, L = 1,3-bis(diphenylphosphino)propane) which was delivered to the surfaces of four different self-assembled monolayers on gold (SAMs) at coverages of 1011 and 1012 clusters/mm2. Employing the spatial profiling capabilities of in-situ time-of-flight secondary ion mass spectrometry (TOF-SIMS) it is shown that, in addition to the chemical functionality of the monolayer (as demonstrated previously: ACS Nano, 2012, 6, 573) the coverage of cationic gold clusters on the surface may be used to control the distribution of ionic charge states of the soft-landed multiply charged clusters. In the case of a 1H,1H,2H,2H-perfluorodecanethiol SAM (FSAM) almost complete retention of charge by the deposited Au11L53+ clusters was observed at a lower coverage of 1011 clusters/mm2. In contrast, at a higher coverage of 1012 clusters/mm2, pronounced reduction of charge to Au11L52+ and Au11L5+ was observed on the FSAM. When soft landed onto 16- and 11-mercaptohexadecanoic acid surfaces on gold (16,11-COOH-SAMs), the mass-selected Au11L53+ clusters exhibited partial reduction of charge to Au11L52+ at lower coverage and additional reduction of charge to both Au11L52+ and Au11L5+ at higher coverage. The reduction of charge was found to be more pronounced on the surface of the shorter (thinner) C11 than the longer (thicker) C16-COOH-SAM. On the surface of the 1-dodecanethiol (HSAM) monolayer, the most abundant charge state was found to be Au11L52+ at lower coverage and Au11L5+ at higher coverage, respectively. A coverage-dependent electron tunneling mechanism is proposed to account for the observed reduction of charge of mass-selected multiply charged gold clusters soft landed on SAMs. The results demonstrate that one of the critical parameters that influence the chemical and physical properties of supported metal clusters, ionic charge state, may be controlled by selecting the coverage of charged species soft landed onto surfaces.

  1. Interaction between shallow groundwater, saline surface water and contaminant discharge at a seasonally

    E-Print Network [OSTI]

    Clement, Prabhakar

    Interaction between shallow groundwater, saline surface water and contaminant discharge the behaviour of the hydrocarbon plume at the groundwater/surface water transition zone to be strongly B.V. All rights reserved. Keywords: Ground water; Surface water; Hydrocarbons; Discharge; Tides

  2. Multiobjective calibration and sensitivity of a distributed land surface water and energy balance model

    E-Print Network [OSTI]

    Houser, Paul R; Gupta, Hoshin V; Shuttleworth, W. James; Famiglietti, James S

    2001-01-01

    identification and energy balance models on a tallgrassdata for surface energy balance evaluation of a semiaridWatershed. We are energy balance components over a semiarid

  3. Surface-induced charge at the Ge (001) surface and its interaction with self-interstitials

    SciTech Connect (OSTI)

    Kamiyama, Eiji; Sueoka, Koji [Department of Communication Engineering, Okayama Prefectural University, 111 Kuboki, Soja-shi, Okayama-ken 719-1197 (Japan); Vanhellemont, Jan [Department of Solid State Sciences, Ghent University, B-9000 Gent (Belgium)

    2014-02-21

    The Ge (001) surface with dimer structure, is negatively charged while into the bulk, positive charges are observed even deeper than the fifteenth layer from the surface. This is different from the Si case. This charge distribution can lead to the repulsion of positively charged self-interstitials by the positively charged near surface layer in an implantation or irradiation process. Self-interstitial reflection by Ge surfaces had been proposed to explain the results of diffusion experiments during irradiation whereby positively charged self-interstitials are generated by collisions of highly energetic particles with Ge atoms. We investigated different Ge (001) surface comparing an as-cleaved surface with dangling bonds to a surface with dimer structure, and to a surface terminated by hydrogen atoms. The effect of these different surface terminations on the surface-induced charges in the near surface bulk were calculated by ab initio techniques.

  4. The widely used Weather Research and Forecasting (WRF) model provides a few land surface schemes

    E-Print Network [OSTI]

    Menut, Laurent

    is com- puted from the surface energy balance using a force- restore algorithm for heat exchange within linearised surface energy balance equation representing the combined ground-vegetation sur- face. Soil (USA) and widely used in the World meteorolo- gical and air quality communities. WRF provides a choice

  5. Infrared Land Surface Emissivity in the Vicinity of the ARM SGP Central Facility

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACT EVALUATION PLAN FOR THEVorticesInformation| U.S. DOEInfrared Land

  6. Surface Interactions as a Mechanism for Nuclear Magnetic Relaxation 

    E-Print Network [OSTI]

    Smith, Ronald Edward

    1960-01-01

    values of the parameter h, . . . . . . . . . . , . . . . . . 18 Experimental results 24 Relaxation in a surface layer of reduced mobility of thickness xl ~. . . 26 Relaxation arising from collisions with the surface . 28 Relaxation by a surface layer... of the transcendental equation 1 tan & 1 - ha (2. 26) and P ~r. The relaxation time is now defined to be the time required for the excess polarization to decay to 1/e of its original ~slue. This decay is given by a sum of exponentials rather than a single...

  7. Effects of subsurface fracture interactions on surface deformation

    E-Print Network [OSTI]

    Jerry, Ruel (Ruel Valentine)

    2013-01-01

    Although the surface deformation resulting from the opening of a single fracture in a layered elastic half-space resembles the observed deformation at the InSalah site, it seems unlikely that only a single fracture is ...

  8. An update on modeling land-ice/ocean interactions in CESM

    SciTech Connect (OSTI)

    Asay-davis, Xylar

    2011-01-24

    This talk is an update on ongoing land-ice/ocean coupling work within the Community Earth System Model (CESM). The coupling method is designed to allow simulation of a fully dynamic ice/ocean interface, while requiring minimal modification to the existing ocean model (the Parallel Ocean Program, POP). The method makes use of an immersed boundary method (IBM) to represent the geometry of the ice-ocean interface without requiring that the computational grid be modified in time. We show many of the remaining development challenges that need to be addressed in order to perform global, century long climate runs with fully coupled ocean and ice sheet models. These challenges include moving to a new grid where the computational pole is no longer at the true south pole and several changes to the coupler (the software tool used to communicate between model components) to allow the boundary between land and ocean to vary in time. We discuss benefits for ice/ocean coupling that would be gained from longer-term ocean model development to allow for natural salt fluxes (which conserve both water and salt mass, rather than water volume).

  9. Dynamics of Energy Transfer and Soft-Landing in Collisions of Protonated Dialanine with Perfluorinated Self-Assembled Monolayer Surfaces

    SciTech Connect (OSTI)

    Pratihar, Subha; Kohale, Swapnil C.; Bhakta, Dhruv G.; Laskin, Julia; Hase, William L.

    2014-11-21

    Chemical dynamics simulations are reported which provide atomistic details of collisions of protonated dialanine, ala2-H+, with a perfluorinateted octanethiolate self-assembled monolayer (F-SAM ) surface. The simulations are performed at collisions energy Ei of 5.0, 13.5, 22.5, 30.00, and 70 eV, and incident angles 0o 0 (normal) and grazing 45o. Excellent agreement with experiment (J. Am. Chem. Soc. 2000, 122, 9703-9714) is found for both the average fraction and distribution of the collision energy transferred to the ala2-H+ internal degrees of freedom. The dominant pathway for this energy transfer is to ala2-H+ vibration, but for Ei = 5.0 eV ~20% of the energy transfer is to ala2-H+ rotation. Energy transfer to ala2-H+ rotation decreases with increase in Ei and becomes negligible at high Ei. Three types of collisions are observed in the simulations: i.e. those for which ala2-H+ (1) directly scatters off the F-SAM surface; (2) sticks/physisorbs on//in the surface, but desorbs within the 10 ps numerical integration of the simulations; and (3) remains trapped (i.e. soft-landed) on/in the surface when the simulations are terminated. Penetration of the F-SAM by ala2-H+ is important for the latter two types of events. The trapped trajectories are expected to have relatively long residence times on the surface, since a previous molecular dynamics simulation (J. Phys. Chem. B 2014, 118, 5577-5588) shows that thermally accommodated ala2-H+ ions have an binding energy with the F-SAM surface of at least ~15 kcal/mol.

  10. Surface based remote sensing of aerosol-cloud interactions

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorking With Livermore National LabSupplierNSTPhoton SourceSurfaceSurface

  11. Evanescent wave and video microscopy methods for directly measuring interactions between surface-immobilized biomolecules 

    E-Print Network [OSTI]

    Everett, William Neil

    2009-05-15

    -specific protein-protein interactions between surface immobilized cadherin fragments demonstrate the potential utility of this experimental system and these methods. Additionally, quantum dot-modified colloids were synthesized and evanescent wave...

  12. Climate and Energy-Water-Land System Interactions Technical Report to the U.S. Department of Energy in Support of the National Climate Assessment

    SciTech Connect (OSTI)

    Skaggs, Richard; Hibbard, Kathleen A.; Frumhoff, Peter; Lowry, Thomas; Middleton, Richard; Pate, Ron; Tidwell, Vincent C.; Arnold, J. G.; Averyt, Kristen; Janetos, Anthony C.; Izaurralde, Roberto C.; Rice, Jennie S.; Rose, Steven K.

    2012-03-01

    This report provides a framework to characterize and understand the important elements of climate and energy-water-land (EWL) system interactions. It identifies many of the important issues, discusses our understanding of those issues, and presents a long-term research program research needs to address the priority scientific challenges and gaps in our understanding. Much of the discussion is organized around two discrete case studies with the broad themes of (1) extreme events and (2) regional intercomparisons. These case studies help demonstrate unique ways in which energy-water-land interactions can occur and be influenced by climate.

  13. Predicted impacts of climate and land use change on surface ozone in the Houston, Texas, area

    E-Print Network [OSTI]

    Yang, Zong-Liang

    sensitivity experiments show that the effect of future anthropogenic emissions change is on the same order detrimental effects on human health and plants. The conditions conducive to high O3 concentrations near the surface generally include warm weather, high solar radiation and high-pressure sys- tems. Future

  14. VIIRS narrowband to broadband land surface albedo conversion: formula and validation

    E-Print Network [OSTI]

    Liang, Shunlin

    ) spectral albedos. It is based on extensive radiative transfer simulations and multivariate regression algorithm. 1. Introduction Albedo is a critical variable for accurate climate and surface energy balance the algorithm's technological progress to provide an operational albedo product that will build and improve upon

  15. Nonlinear surface acoustic wave pulses in solids: Laser excitation, propagation, interactions ,,invited...

    E-Print Network [OSTI]

    Schuessler, Hans

    Nonlinear surface acoustic wave pulses in solids: Laser excitation, propagation, interactions techniques enabled generation of very high amplitude pulses with acoustic Mach numbers about 0.01. Such waves their propagation. As an intense surface acoustic wave SAW propagates, the temporal evolution of the wave shape

  16. The effect of stratigraphy and soil plasticity on the settlement characteristics of reclaimed surface mined land 

    E-Print Network [OSTI]

    Rangel, Jorge Enrique

    1979-01-01

    of the manuscript I am grateful to my fellow graduate students who worked with me in this thesis: I thank Richard M. Pollard for his skillful operation of the Scanning Electron microscope whicn produced optimum microphotographs very important...THE EFFECT OF STRATIGRAPHY AND SOIL PLASTICITY ON THE SETTLEMENT CHARACTERISTICS OF FECLAIMED SURFACE MINED I~D A Thesis GORGE ENRIQUE RANGEL Submitted to the Graduate College of Texas ASM University in partial fulfillment of the regni ement...

  17. Land surface temperature estimation over the Northern Great Plains using passive microwave data from Nimbus 7 

    E-Print Network [OSTI]

    Lambert, Vicki Michelle

    1987-01-01

    and the the upper boundary of 1, 000 pm can be arbitrarily divided into three spectral catagories. Generally the near infrared region lies betlveen 0. 72 and 1. 3 psn; the nnddle infrared region lies between 1. 3 and 3 pm; and the far infrared lies betlveen 7. 5... the day. The wavelength region from 3. 0 to 5. 0 pnx is the transitiou region where solar irradiance is relatively sxnall and thermal ennssion froxn terrestrial surf'aces is not, easily detectable. The third band, 7. 5-13. 5 pnx. as slxown in Figure...

  18. Exploring the interaction between lithium ion and defective graphene surface using dispersion corrected DFT studies

    SciTech Connect (OSTI)

    Vijayakumar, M.; Hu, Jian Z.

    2013-10-15

    To analyze the lithium ion interaction with realistic graphene surfaces, we carried out dispersion corrected DFT-D3 studies on graphene with common point defects and chemisorbed oxygen containing functional groups along with defect free graphene surface. Our study reveals that, the interaction between lithium ion (Li+) and graphene is mainly through the delocalized ? electron of pure graphene layer. However, the oxygen containing functional groups pose high adsorption energy for lithium ion due to the Li-O ionic bond formation. Similarly, the point defect groups interact with lithium ion through possible carbon dangling bonds and/or cation-? type interactions. Overall these defect sites render a preferential site for lithium ions compared with pure graphene layer. Based on these findings, the role of graphene surface defects in lithium battery performance were discussed.

  19. Earth is a dynamic, living oasis in the desolation of space. The land, oceans, and air interact in complex ways to give our planet a unique set

    E-Print Network [OSTI]

    Earth is a dynamic, living oasis in the desolation of space. The land, oceans, and air interact in this process. In the mid 1980s, NASA developed a systems-based approach to studying the Earth and called it "Earth System Science" to advance the knowledge of Earth as a planet. Space-based observations

  20. Materials of interaction : responsive materials in the design of transformable interactive surfaces

    E-Print Network [OSTI]

    Coelho, Marcelo

    2008-01-01

    Materials that embody computational properties are reshaping the ways in which we design, interact and communicate. This thesis looks at the topic of form transformation and how to bring the programmability and versatility ...

  1. Effects of urban land cover modifications in a mesoscale meteorological model on surface temperature and heat fluxes in the Phoenix metropolitan area.

    E-Print Network [OSTI]

    Hall, Sharon J.

    Effects of urban land cover modifications in a mesoscale meteorological model on surface between the two simulations. Mesoscale atmospheric models such as the Pennsylvania State University for the Phoenix metropolitan area was implemented in the fifth- generation PSU/NCAR mesoscale meteorological model

  2. 344 IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 46, NO. 2, FEBRUARY 2008 A Parameterization of the Microwave Land Surface

    E-Print Network [OSTI]

    Aires, Filipe

    A Parameterization of the Microwave Land Surface Emissivity Between 19 and 100 GHz, Anchored to Satellite emissivities have been calculated for Tropical Rainfall Measuring Mission (TRMM) Microwave In- strument (TMI), Special Sensor Microwave/Imager (SSM/I), and Advanced Microwave Sounder Unit-A conditions, for two months

  3. Modeling the Effects of Irrigation on Land Surface Fluxes and States over the Conterminous United States: Sensitivity to Input Data and Model Parameters

    SciTech Connect (OSTI)

    Leng, Guoyong; Huang, Maoyi; Tang, Qiuhong; Sacks, William J.; Lei, Huimin; Leung, Lai-Yung R.

    2013-09-16

    Previous studies on irrigation impacts on land surface fluxes/states were mainly conducted as sensitivity experiments, with limited analysis of uncertainties from the input data and model irrigation schemes used. In this study, we calibrated and evaluated the performance of irrigation water use simulated by the Community Land Model version 4 (CLM4) against observations from agriculture census. We investigated the impacts of irrigation on land surface fluxes and states over the conterminous United States (CONUS) and explored possible directions of improvement. Specifically, we found large uncertainty in the irrigation area data from two widely used sources and CLM4 tended to produce unrealistically large temporal variations of irrigation demand for applications at the water resources region scale over CONUS. At seasonal to interannual time scales, the effects of irrigation on surface energy partitioning appeared to be large and persistent, and more pronounced in dry than wet years. Even with model calibration to yield overall good agreement with the irrigation amounts from the National Agricultural Statistics Service (NASS), differences between the two irrigation area datasets still dominate the differences in the interannual variability of land surface response to irrigation. Our results suggest that irrigation amount simulated by CLM4 can be improved by (1) calibrating model parameter values to account for regional differences in irrigation demand and (2) accurate representation of the spatial distribution and intensity of irrigated areas.

  4. Investigations into Protein-Surface Interactions via Atomic Force Microscopy and Surface Plasmon Resonance

    E-Print Network [OSTI]

    Settle, Jenifer Kaye

    2012-08-31

    performed via surface plasmon resonance (SPR) to investigate the dynamics of this adsorption process on gold, and an amine-, carboxyl-, methyl- and hydroxyl-terminated SAM films. Chapter 4 provides background and investigation into F1-Adenosine triphosphate...

  5. Particle-Surface Interaction Databases in ALADDIN Format

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    These databases are listed as recommended resources by CFADC. They represent older data and are not necessarily DOE-originated or funded. However, they are cited in the DOE Data Explorer because of their availability through a DOE Data Center. The citations for these databases are: 1) Energy Dependence of Ion-Induced Sputtering Yields of Monatomic Solids in the Low Energy Region. N. Matsunami, Y. Yamamura, N. Itoh, H. Tawara, T. Kawamura. Report IPPJ-AM-52, Institute of Plasma Physics (National Institute for Fusion Science), Nagoya, Japan (1987); 2) Energy Dependence of the Yields of Ion-Induced Sputtering of Monatomic Solids. N. Maksunami, Y. Yamaura, Y. Itikawa, N. Itoh, Y. Kazumata, S. Miyagawer, K. Morita, R. Strimizu, H. Tawara. Report IPPJ-AM-32, Institute of Plasma Physics (National Institute for Fusion Science), Nagoya, Japan (1988); 3) Particle Reflection from Surfaces - A Recommended Data Base. E. W. Thomas, R. K. Janev and J. J. Smith. Report IAEA INDC(NDS)-249, July 1991; 4) Sputtering Data. W. Eckstein, C. Garcia-Rosales, J. Roth and W. Ottenberger. Max-Plank-Institute fur Plasmaphysik Report IPP9/82 (1993); 5) An Evaluated Database for Sputtering. E. W. Thomas, R. K. Janev, J. Botero, J. J. Smith and Y. Qiu. Report IAEA INDC(NDS)-287 (1993).

  6. Mechanism of surface modification in the plasma-surface interaction in electrical arcs

    E-Print Network [OSTI]

    Timko, H; Nordlund, K; Costelle, L; Matyash, K; Schneider, R; Toerklep, A; Arnau-Izquierdo, G; Descoeudres, A; Calatroni, S; Taborelli, M; Wuensch, W

    2010-01-01

    Electrical sparks and arcs are plasma discharges that carry large currents and can strongly modify surfaces. This damage usually comes in the form of micrometer-sized craters and frozen-in liquid on the surface. Using a combination of experiments, plasma and atomistic simulation tools, we now show that the observed formation of deep craters and liquidlike features during sparking in vacuum is explained by the impacts of energetic ions, accelerated under the given conditions in the plasma sheath to kiloelectron volt energies, on surfaces. The flux in arcs is so high that in combination with kiloelectron volt energies it produces multiple overlapping heat spikes, which can lead to cratering even in materials such as Cu, where a single heat spike normally does not.

  7. Mechanism of surface modification in the plasma surface interaction in electrical arcs

    E-Print Network [OSTI]

    Timko, Helga; Djurabekova, Flyura; Nordlund, Kai; Matyash, Konstantin; Schneider, Ralf; Toerklep, Anders; Arnau-Izquierdo, Gonzalo; Descoeudres, Antoine; Calatroni, Sergio; Taborelli, Mauro; Wuensch, Walter

    2010-01-01

    Electrical sparks and arcs are plasma discharges that carry large currents and can strongly modify surfaces. This damage usually comes in the form of micrometer-sized craters and frozen-in liquid on the surface. Using a combination of experiments, plasma and atomistic simulation tools, we now show that the observed formation of deep craters and liquidlike features during sparking in vacuum is explained by the impacts of energetic ions, accelerated under the given conditions in the plasma sheath to kiloelectron volt energies, on surfaces. The flux in arcs is so high that in combination with kiloelectron volt energies it produces multiple overlapping heat spikes, which can lead to cratering even in materials such as Cu, where a single heat spike normally does not.

  8. Casimir-Polder interaction from exact diagonalization and state mixing near surfaces

    E-Print Network [OSTI]

    Sofia Ribeiro; Stefan Yoshi Buhmann; Thomas Stielow; Stefan Scheel

    2015-06-08

    Dispersion forces have a sizeable effect on the energy levels of highly excited Rydberg atoms when brought close to material surfaces. Rydberg atoms experience energy shifts in the GHz range at micrometer distances, suggestive of considerable state admixture. We show that despite the non-applicability of perturbation theory for Rydberg atoms near a surface, the energy shift due to the dispersion interaction can be obtained from an exact diagonalization of the interaction Hamiltonian by finding the zeros of the Pick function. Moreover, we show that contrary to intuition from single-mode approaches, surface-induced state mixing is generally suppressed even for large interaction energies. We give a tailored example where mixing is observable despite this effect.

  9. Interaction of laser-generated surface acoustic pulses with fine particles: Surface cleaning and adhesion studies

    E-Print Network [OSTI]

    Schuessler, Hans

    and adhesion studies Al. A. Kolomenskiia) and H. A. Schuessler Department of Physics, Texas A&M University of the adhesion force. © 1998 American Institute of Physics. S0021-8979 98 02317-2 I. INTRODUCTION of the adhesive forces. In the present work a novel cleaning technique with laser-generated surface acoustic waves

  10. Covalent Immobilization of Peptides on Self-Assembled Monolayer Surfaces Using Soft-Landing of Mass-Selected Ions

    SciTech Connect (OSTI)

    Wang, Peng; Hadjar, Omar; Laskin, Julia

    2007-06-23

    Covalent immobilization of peptides on solid supports plays an important role in biochemistry with applications ranging from characterization of molecular recognition events at the amino acid level and identification of biologically active motifs in proteins to development of novel biosensors and substrates for improved cell adhesion. Self-assembled monolayer surfaces (SAMs) provide a simple and convenient platform for tailoring chemical properties of a variety of substrates. Existing techniques for linking peptides to SAMs are based on solution-phase synthetic strategies and require relatively large quantities of purified material. Here, we report a novel approach for highly selective covalent binding of peptides to SAMs using soft-landing (SL) of mass-selected ions. SL is defined as intact deposition of ions onto suitable substrates at hyperthermal (<100 eV) energies.Recent studies have demonstrated that SAMs are excellent deposition targets for SL due to their ability to dissipate kinetic energies of the projectiles and their efficiency in trapping captured species. It has been proposed that SL could be utilized for controlled preparation of protein arrays.

  11. Electron emission induced by resonant coherent ion-surface interaction at grazing incidence

    SciTech Connect (OSTI)

    Garcia de Abajo, F.J. ); Ponce, V.H. ); Echenique, P.M. )

    1992-10-19

    A new spectroscopy based on the resonant coherently induced electron loss to the continuum in ion-surface scattering under grazing incidence is proposed. A series of peaks, corresponding to the energy differences determined by the resonant interaction with the rows of atoms in the surface, is predicted to appear in the energy distribution of electrons emitted from electronic states bound to the probe. Calculations for MeV He{sup +} ions scattered at a W(001) surface along the {l angle}100{r angle} direction with a glancing angle of 0--2 mrad show a total yield close to 1.

  12. Molecular Dynamics Simulation Study of Interaction between Model Rough Hydrophobic Surfaces

    E-Print Network [OSTI]

    Changsun Eun; Max L. Berkowitz

    2011-06-01

    We study some aspects of hydrophobic interaction between molecular rough and flexible model surfaces. The model we use in this work is based on a model we used previously (Eun, C.; Berkowitz, M. L. J. Phys. Chem. B 2009, 113, 13222-13228), when we studied the interaction between model patches of lipid membranes. Our original model consisted of two graphene plates with attached polar headgroups; the plates were immersed in a water bath. The interaction between such plates can be considered as an example of a hydrophilic interaction. In the present work we modify our previous model by removing the charge from the zwitterionic headgroups. As a result of this procedure, the plate character changes; it becomes hydrophobic. By separating the total interaction (or potential of mean force, PMF) between plates into the direct and the water-mediated interactions we observe that the latter changes from repulsive to attractive, clearly emphasizing the important role of water as a medium. We also investigate the effect of roughness and flexibility of the headgroups on the interaction between plates and observe that roughness enhances the character of the hydrophobic interaction. The presence of a dewetting transition in a confined space between charge-removed plates confirms that the interaction between plates is strongly hydrophobic. In addition, we notice that there is a shallow local minimum in the PMF in case of charge-removed plates. We find that this minimum is associated with the configurational changes that flexible headgroups undergo, as the two plates are brought together.

  13. Spherical Torus Plasma Interactions with Large-Area Liquid Lithium Surfaces in CDX-U

    E-Print Network [OSTI]

    California at Los Angeles, University of

    Outside of Plasma" (DOLLOP) lithium wall conditioning experiments,[3] for example, in the Tokamak Fusion, introduction of large area lithium limiter targets and walls into existing tokamak facilities has not yet taken- 1 - Spherical Torus Plasma Interactions with Large-Area Liquid Lithium Surfaces in CDX-U R. KAITA

  14. Theory of thin-skin eddy-current interaction with surface cracks N. Harfielda)

    E-Print Network [OSTI]

    Bowler, John R.

    Theory of thin-skin eddy-current interaction with surface cracks N. Harfielda) and J. R. Bowler; accepted for publication 14 July 1997 Eddy-current non-destructive evaluation is commonly performed of a typical crack. A thin-skin analysis of eddy currents is presented in which the electromagnetic fields

  15. Interaction between graphene and nickel(111) surfaces with commensurate and incommensurate orientational relationships

    E-Print Network [OSTI]

    Elliott, James

    Interaction between graphene and nickel(111) surfaces with commensurate and incommensurate The role of the catalyst metal in the growth of carbon nanotubes [1] and graphene [2] has been widely wall carbon nanotubes (SWNTs) [4­6] and monolayer graphene [7­11] using a chemical vapour deposition

  16. [Studies on the interaction of blood components with ultra-smooth polymer surfaces

    SciTech Connect (OSTI)

    Carlson, T.H.

    1989-04-17

    This report is in three parts, though each is briefly described data is provided. The three parts address (1) radioiodination of human thrombin and fibrinogen; (2) interaction of blood components with ultra- smooth polymer surfaces; and (3) initial studies of Tecoflex and treated Tecoflex cups with normal serum samples.

  17. Polarizable interaction potential for water from coupled cluster calculations. I. Analysis of dimer potential energy surface

    E-Print Network [OSTI]

    by nonadditive effects which make it impossible to sufficiently accurately represent the energy of water as a sumPolarizable interaction potential for water from coupled cluster calculations. I. Analysis of dimer potential energy surface Robert Bukowski,1 Krzysztof Szalewicz,1,a Gerrit C. Groenenboom,2 and Ad van der

  18. van der Waals Interaction, Surface Free Energies, and Contact Angles: Dispersive Polymers and Liquids

    E-Print Network [OSTI]

    Chan, Derek Y C

    van der Waals Interaction, Surface Free Energies, and Contact Angles: Dispersive Polymers and Liquids Calum J. Drummond*, and Derek Y. C. Chan CSIRO Division of Chemicals and Polymers, Private Bag 10 and ALVL are the non-retarded Hamaker constants for the heterointeraction between polymer and liquid across

  19. Characterizing the Groundwater-Surface Water Interactions in Different Subsurface Geologic Environments Using Geochemical and Isotopic Analyses

    E-Print Network [OSTI]

    Long, Molly

    2014-12-31

    -surface water interactions. Knowledge of the influence these factors have on surface water connections with groundwater will help determine possible recharge and contaminant flow paths affecting future water supply wells installed in similar alluvial...

  20. Real-time Global Flood Estimation using Satellite-based Precipitation and a Coupled Land Surface and Routing Model

    SciTech Connect (OSTI)

    Wu, Huan; Adler, Robert F.; Tian, Yudong; Huffman, George; Li, Hongyi; Wang, Jianjian

    2014-04-09

    A community land surface model, the Variable Infiltration Capacity (VIC) model, is coupled with a newly developed hierarchical dominant river tracing-based runoff-routing model to form the Dominant river tracing-Routing Integrated with VIC Environment (DRIVE) model system, which serves as the new core of the real-time Global Flood Monitoring System (GFMS). The GFMS uses real-time satellite-based precipitation to derive flood-monitoring parameters for the latitude-band 50{degree sign}N-50{degree sign}S at relatively high spatial (~12km) and temporal (3-hourly) resolution. Examples of model results for recent flood events are computed using the real-time GFMS (http://flood.umd.edu). To evaluate the accuracy of the new GFMS, the DRIVE model is run retrospectively for 15 years using both research-quality and real-time satellite precipitation products. Statistical results are slightly better for the research-quality input and significantly better for longer duration events (three-day events vs. one-day events). Basins with fewer dams tend to provide lower false alarm ratios. For events longer than three days in areas with few dams, the probability of detection is ~0.9 and the false alarm ratio is ~0.6. In general, these statistical results are better than those of the previous system. Streamflow was evaluated at 1,121 river gauges across the quasi-global domain. Validation using real-time precipitation across the tropics (30ºS-30ºN) gives positive daily Nash-Sutcliffe Coef?cients for 107 out of 375 (28%) stations with a mean of 0.19 and 51% of the same gauges at monthly scale with a mean of 0.33. There were poorer results in higher latitudes, probably due to larger errors in the satellite precipitation input.

  1. On the Interaction between Marine Boundary Layer Cellular Cloudiness and Surface Heat Fluxes

    SciTech Connect (OSTI)

    Kazil, J.; Feingold, G.; Wang, Hailong; Yamaguchi, T.

    2014-01-02

    The interaction between marine boundary layer cellular cloudiness and surface uxes of sensible and latent heat is investigated. The investigation focuses on the non-precipitating closed-cell state and the precipitating open-cell state at low geostrophic wind speed. The Advanced Research WRF model is used to conduct cloud-system-resolving simulations with interactive surface fluxes of sensible heat, latent heat, and of sea salt aerosol, and with a detailed representation of the interaction between aerosol particles and clouds. The mechanisms responsible for the temporal evolution and spatial distribution of the surface heat fluxes in the closed- and open-cell state are investigated and explained. It is found that the horizontal spatial structure of the closed-cell state determines, by entrainment of dry free tropospheric air, the spatial distribution of surface air temperature and water vapor, and, to a lesser degree, of the surface sensible and latent heat flux. The synchronized dynamics of the the open-cell state drives oscillations in surface air temperature, water vapor, and in the surface fluxes of sensible and latent heat, and of sea salt aerosol. Open-cell cloud formation, cloud optical depth and liquid water path, and cloud and rain water path are identified as good predictors of the spatial distribution of surface air temperature and sensible heat flux, but not of surface water vapor and latent heat flux. It is shown that by enhancing the surface sensible heat flux, the open-cell state creates conditions by which it is maintained. While the open-cell state under consideration is not depleted in aerosol, and is insensitive to variations in sea-salt fluxes, it also enhances the sea-salt flux relative to the closed-cell state. In aerosol-depleted conditions, this enhancement may replenish the aerosol needed for cloud formation, and hence contribute to the perpetuation of the open-cell state as well. Spatial homogenization of the surface fluxes is found to have only a small effect on cloud properties in the investigated cases. This indicates that sub-grid scale spatial variability in the surface flux of sensible and latent heat and of sea salt aerosol may not be required in large scale and global models to describe marine boundary layer cellular cloudiness.

  2. Electron emission induced by resonant coherent interaction in ion-surface scattering at grazing incidence

    SciTech Connect (OSTI)

    Garcia de Abajo, F.J. ); Ponce, V.H.; Echenique, P.M. )

    1994-01-15

    The resonant coherent interaction of an ion with an oriented crystal surface, under grazing-incidence conditions with respect to a special direction of the crystal, gives rise to electron loss to the continuum from electronic bound states of the ion. The calculations presented below predict large probabilities for electron emission due to this mechanism. The electrons are emitted with well defined energies, expressed in terms of the condition of resonance. Furthermore, the emission takes place around certain preferential directions, which are determined by both the latter condition and the symmetry of the surface lattice. Our calculations for MeV He[sup +] ions scattered at a W(001) surface along the [l angle]100[r angle] direction with glancing angle of 0--2 mrad indicate a yield of emission close to 1. Using heavier projectiles, one obtains smaller yields, but still large enough to be measurable in some cases (e.g., [approx]0.9 for 53 MeV B[sup 4+] and an angle of incidence of 1 mrad). Besides, the initial bound state is energy shifted due to the interaction with both the crystal potential and the velocity-dependent image potential. This results in a slight shift of the peaks of emission, which suggests a possible spectroscopy for analyzing the dynamical interaction of electronic bound states with solid surfaces.

  3. What is the importance of climate model bias when projecting the impacts of climate change on land surface processes?

    SciTech Connect (OSTI)

    Liu, M. L.; Rajagopalan, K.; Chung, S. H.; Jiang, X.; Harrison, J. H.; Nergui, T.; Guenther, Alex B.; Miller, C.; Reyes, J.; Tague, C. L.; Choate, J. S.; Salathe, E.; Stockle, Claudio O.; Adam, J. C.

    2014-05-16

    Regional climate change impact (CCI) studies have widely involved downscaling and bias-correcting (BC) Global Climate Model (GCM)-projected climate for driving land surface models. However, BC may cause uncertainties in projecting hydrologic and biogeochemical responses to future climate due to the impaired spatiotemporal covariance of climate variables and a breakdown of physical conservation principles. Here we quantify the impact of BC on simulated climate-driven changes in water variables(evapotranspiration, ET; runoff; snow water equivalent, SWE; and water demand for irrigation), crop yield, biogenic volatile organic compounds (BVOC), nitric oxide (NO) emissions, and dissolved inorganic nitrogen (DIN) export over the Pacific Northwest (PNW) Region. We also quantify the impacts on net primary production (NPP) over a small watershed in the region (HJ Andrews). Simulation results from the coupled ECHAM5/MPI-OM model with A1B emission scenario were firstly dynamically downscaled to 12 km resolutions with WRF model. Then a quantile mapping based statistical downscaling model was used to downscale them into 1/16th degree resolution daily climate data over historical and future periods. Two series climate data were generated according to the option of bias-correction (i.e. with bias-correction (BC) and without bias-correction, NBC). Impact models were then applied to estimate hydrologic and biogeochemical responses to both BC and NBC meteorological datasets. These im20 pact models include a macro-scale hydrologic model (VIC), a coupled cropping system model (VIC-CropSyst), an ecohydrologic model (RHESSys), a biogenic emissions model (MEGAN), and a nutrient export model (Global-NEWS). Results demonstrate that the BC and NBC climate data provide consistent estimates of the climate-driven changes in water fluxes (ET, runoff, and water demand), VOCs (isoprene and monoterpenes) and NO emissions, mean crop yield, and river DIN export over the PNW domain. However, significant differences rise from projected SWE, crop yield from dry lands, and HJ Andrews’s ET between BC and NBC data. Even though BC post-processing has no significant impacts on most of the studied variables when taking PNW as a whole, their effects have large spatial variations and some local areas are substantially influenced. In addition, there are months during which BC and NBC post-processing produces significant differences in projected changes, such as summer runoff. Factor-controlled simulations indicate that BC post-processing of precipitation and temperature both substantially contribute to these differences at region scales. We conclude that there are trade-offs between using BC climate data for offline CCI studies vs. direct modeled climate data. These trade-offs should be considered when designing integrated modeling frameworks for specific applications; e.g., BC may be more important when considering impacts on reservoir operations in mountainous watersheds than when investigating impacts on biogenic emissions and air quality (where VOCs are a primary indicator).

  4. The role of van der Waals interactions in the adsorption of noble gases on metal surfaces

    SciTech Connect (OSTI)

    Chen, De-Li; Al-Saidi, W. A.; Johnson, J. Karl

    2012-10-24

    Adsorption of noble gases on metal surfaces is determined by weak interactions. We applied two versions of the nonlocal van der Waals density functional (vdW-DF) to compute adsorption energies of Ar, Kr, and Xe on Pt(111), Pd(111), Cu(111), and Cu(110) metal surfaces. We have compared our results with data obtained using other density functional approaches, including the semiempirical vdW corrected DFT-D2. The vdW-DF results show considerable improvements in the description of adsorption energies and equilibrium distances over other DFTbased methods, giving good agreement with experiments. We have also calculated perpendicular vibrational energies for noble gases on the metal surfaces using vdWDF data and found excellent agreement with available experimental results. Our vdW-DF calculations show that adsorption of noble gases on low-coordination sites is energetically favored over high-coordination sites, but only by a few meV. Analysis of the 2-dimensional potential energy surface shows that the high-coordination sites are local maxima on the 2-dimensional potential energy surface and therefore unlikely to be observed in experiments, which provides an explanation of the experimental observations. The DFT-D2 approach with the standard parameterization was found to overestimate the dispersion interactions, and to give the wrong adsorption site preference for four of the nine systems we studied.

  5. Unveiling Surface Redox Charge Storage of Interacting Two-Dimensional Hetero-Nanosheets in Hierarchical Architectures

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Mahmood, Qasim [Department of Chemical Engineering, College of Engineering, Kyung Hee University (Republic of Korea); Bak, Seong-Min [Brookhaven National Laboratory (BNL), Upton, NY (United States); Kim, Min G. [Beamline Research Division, Pohang Accelerator Laboratory, Pohang (Republic of Korea); Yun, Sol [School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon (Republic of Korea); Yang, Xiao-Qing [Brookhaven National Laboratory (BNL), Upton, NY (United States); Shin, Hyeon S. [Department of Energy Engineering, Department of Chemistry, and Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology(UNIST) (Republic of Korea); Kim, Woo S. [Department of Chemical Engineering, College of Engineering, Kyung Hee University (Republic of Korea); Braun, Paul V. [Department of Materials Science and Engineering Materials Research Laboratory and Beckman Institute, University of Illinois at Urbana?Champaign, Urbana, Illinois (United States); Park, Ho S. [School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon (Republic of Korea)

    2015-04-08

    Two-dimensional (2D) heteronanosheets are currently the focus of intense study due to the unique properties that emerge from the interplay between two low-dimensional nanomaterials with different properties. However, the properties and new phenomena based on the two 2D heteronanosheets interacting in a 3D hierarchical architecture have yet to be explored. Here, we unveil the surface redox charge storage mechanism of surface-exposed WS2 nanosheets assembled in a 3D hierarchical heterostructure using in situ synchrotron X-ray absorption and Raman spectroscopic methods. The surface dominating redox charge storage of WS2 is manifested in a highly reversible and ultrafast capacitive fashion due to the interaction of heteronanosheets and the 3D connectivity of the hierarchical structure. In contrast, compositionally identical 2D WS2 structures fail to provide a fast and high capacitance with different modes of lattice vibration. The distinctive surface capacitive behavior of 3D hierarchically structured heteronanosheets is associated with rapid proton accommodation into the in-plane W–S lattice (with the softening of the E2g bands), the reversible redox transition of the surface-exposed intralayers residing in the electrochemically active 1T phase of WS2 (with the reversible change in the interatomic distance and peak intensity of W–W bonds), and the change in the oxidation state during the proton insertion/deinsertion process. This proposed mechanism agrees with the dramatic improvement in the capacitive performance of the two heteronanosheets coupled in the hierarchical structure.

  6. Interplay of radiative and nonradiative transitions in surface hopping with radiation-molecule interactions

    SciTech Connect (OSTI)

    Bajo, Juan José; Granucci, Giovanni Persico, Maurizio

    2014-01-28

    We implemented a method for the treatment of field induced transitions in trajectory surface hopping simulations, in the framework of the local diabatization scheme, especially suited for on-the-fly dynamics. The method is applied to a simple one-dimensional model with an avoided crossing and compared with quantum wavepacket dynamics. The results show the importance of introducing a proper decoherence correction to surface hopping, in order to obtain meaningful results. Also the energy conservation policy of standard surface hopping must be revised: in fact, the quantum wavepacket energetics is well reproduced if energy absorption/emission is allowed for in the hops determined by radiation-molecule coupling. To our knowledge, this is the first time the issues of decoherence and energy conservation have been analyzed in depth to devise a mixed quantum-classical method for dynamics with molecule-field interactions.

  7. PUBLISHED ONLINE: 29 APRIL 2012 | DOI: 10.1038/NCLIMATE1505 Impacts of wind farms on land surface temperature

    E-Print Network [OSTI]

    Zhou, Liming

    LETTERS PUBLISHED ONLINE: 29 APRIL 2012 | DOI: 10.1038/NCLIMATE1505 Impacts of wind farms on land a region in west-central Texas, where four of the world's largest wind farms are located7 . Our results farms relative to nearby non-wind-farm regions. We attribute this warming primarily to wind farms as its

  8. Controlled field experiments of wind effects on thermal signatures of buried and surface-laid land mines

    E-Print Network [OSTI]

    Borchers, Brian

    mines Remke L. van Dam , Brian Borchers, Jan M.H. Hendrickx, and Sung-ho Hong New Mexico Tech, 801 Leroy experiments at the outdoor land mine detection test facility at New Mexico Tech. Here, several anti by subsurface anomalies 3,4,5,6,7 . Inherent to the cyclic nature of the incoming solar radiation, the thermal

  9. Higher surface ozone concentrations over the Chesapeake Bay than over the adjacent land: Observations and models from the

    E-Print Network [OSTI]

    Dickerson, Russell R.

    , in high enough concentrations, is a hazardous secondary air pollutant regulated by the United States t s Observations of ozone are higher over the Chesapeake Bay than areas upwind on land. Dry deposition rates, slower dry deposition rates, and other lesser mechanisms, contribute to the local maximum of ozone over

  10. Unveiling Surface Redox Charge Storage of Interacting Two-Dimensional Hetero-Nanosheets in Hierarchical Architectures

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Mahmood, Qasim; Bak, Seong-Min; Kim, Min G.; Yun, Sol; Yang, Xiao-Qing; Shin, Hyeon S.; Kim, Woo S.; Braun, Paul V.; Park, Ho S.

    2015-03-03

    Two-dimensional (2D) heteronanosheets are currently the focus of intense study due to the unique properties that emerge from the interplay between two low-dimensional nanomaterials with different properties. However, the properties and new phenomena based on the two 2D heteronanosheets interacting in a 3D hierarchical architecture have yet to be explored. Here, we unveil the surface redox charge storage mechanism of surface-exposed WS2 nanosheets assembled in a 3D hierarchical heterostructure using in situ synchrotron X-ray absorption and Raman spectroscopic methods. The surface dominating redox charge storage of WS2 is manifested in a highly reversible and ultrafast capacitive fashion due to themore »interaction of heteronanosheets and the 3D connectivity of the hierarchical structure. In contrast, compositionally identical 2D WS2 structures fail to provide a fast and high capacitance with different modes of lattice vibration. The distinctive surface capacitive behavior of 3D hierarchically structured heteronanosheets is associated with rapid proton accommodation into the in-plane W–S lattice (with the softening of the E2g bands), the reversible redox transition of the surface-exposed intralayers residing in the electrochemically active 1T phase of WS2 (with the reversible change in the interatomic distance and peak intensity of W–W bonds), and the change in the oxidation state during the proton insertion/deinsertion process. This proposed mechanism agrees with the dramatic improvement in the capacitive performance of the two heteronanosheets coupled in the hierarchical structure.« less

  11. Role of Polymer Segment?Particle Surface Interactions in Controlling Nanoparticle Dispersions in Concentrated Polymer Solutions

    SciTech Connect (OSTI)

    Kim, So Youn; Zukoski, Charles F. (UIUC)

    2014-09-24

    The microstructure of particles suspended in concentrated polymer solutions is examined with small-angle X-ray scattering and small-angle neutron scattering. Of interest are changes to long wavelength particle density fluctuations in ternary mixtures of silica nanoparticles suspended in concentrated solutions of poly(ethylene glycol). The results are understood in terms of application of the pseudo-two-component polymer reference interaction site model (PRISM) theory modified to account for solvent addition via effective contact strength of interfacial attraction, {var_epsilon}{sub pc}, in an implicit manner. The combined experimental-theoretical study emphasizes the complex interactions between solvent, polymer, and particle surface that control particle miscibility but also demonstrate that these factors can all be understood in terms of variations of {var_epsilon}{sub pc}.

  12. Interaction of a Contact Resonance of Microspheres with Surface Acoustic Waves

    E-Print Network [OSTI]

    N. Boechler; J. K. Eliason; A. Kumar; A. A. Maznev; K. A. Nelson; N. Fang

    2013-03-01

    We study the interaction of surface acoustic waves (SAWs) with the contact-based, axial vibrational resonance of 1 \\mu m silica microspheres forming a two-dimensional granular crystal adhered to a substrate. The laser-induced transient grating technique is used to excite SAWs and measure their dispersion. The measured dispersion curves exhibit "avoided crossing" behavior due to the hybridization of the SAWs with the microsphere resonance. We compare the measured dispersion curves with those predicted by our analytical model, and find excellent agreement. The approach presented can be used to study the contact mechanics and adhesion of micro- and nanoparticles as well as the dynamics of microscale granular crystals.

  13. A dual wavelength imaging system for plasma-surface interaction studies on the National Spherical Torus Experiment Upgrade

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    A dual wavelength imaging system for plasma-surface interaction studies on the National Spherical.), quantitative analysis of emission from impurity or fuel atoms (e.g., in DIII- D10 , NSTX11 , etc.), real

  14. Recolonization of surface-mined lands by pocket gophers (Geomys breviceps) in East Texas Post Oak Savannah 

    E-Print Network [OSTI]

    Gutierrez, Paula B

    2001-01-01

    Surface mining involves the use of heavy equipment that would theoretically create underground vibrations sensed by pocket gophers. To determine if vibrations cause pocket gopher movement away from areas being mined, gopher movements were monitored...

  15. Quantum simulator for the Hubbard model with long-range Coulomb interactions using surface acoustic waves

    E-Print Network [OSTI]

    Tim Byrnes; Patrik Recher; Na Young Kim; Shoko Utsunomiya; Yoshihisa Yamamoto

    2006-08-09

    A practical experimental scheme for a quantum simulator of strongly correlated electrons is proposed. Our scheme employs electrons confined in a two dimensional electron gas in a GaAs/AlGaAs heterojunction. Two surface acoustic waves are then induced in the GaAs substrate, which create a two dimensional ``egg-carton'' potential. The dynamics of the electrons in this potential is described by a Hubbard model with long-range Coulomb interactions. The state of the electrons in this system can be probed via its conductance and noise properties. This allows the identification of a metallic or insulating state. Numerical estimates for the parameters appearing in the effective Hubbard model are calculated using the proposed experimental system. These calculations suggest that observations of quantum phase transition phenomena of the electrons in the potential array are within experimental reach.

  16. Strong Interaction Effects at a Fermi Surface in a Model for Voltage-Biased Bilayer Graphene

    E-Print Network [OSTI]

    Armour, Wes; Strouthos, Costas

    2015-01-01

    Monte Carlo simulation of a 2+1 dimensional model of voltage-biased bilayer graphene, consisting of relativistic fermions with chemical potential mu coupled to charged excitations with opposite sign on each layer, has exposed non-canonical scaling of bulk observables near a quantum critical point found at strong coupling. We present a calculation of the quasiparticle dispersion relation E(k) as a function of exciton source j in the same system, employing partially twisted boundary conditions to boost the number of available momentum modes. The Fermi momentum k_F and superfluid gap Delta are extracted in the limit j tends to zero for three different values of mu, and support a strongly interacting scenario at the Fermi surface with Delta of order O(mu). We propose an explanation for the observation mu < k_F in terms of a dynamical critical exponent z < 1.

  17. Strong Interaction Effects at a Fermi Surface in a Model for Voltage-Biased Bilayer Graphene

    E-Print Network [OSTI]

    Wes Armour; Simon Hands; Costas Strouthos

    2015-09-11

    Monte Carlo simulation of a 2+1 dimensional model of voltage-biased bilayer graphene, consisting of relativistic fermions with chemical potential mu coupled to charged excitations with opposite sign on each layer, has exposed non-canonical scaling of bulk observables near a quantum critical point found at strong coupling. We present a calculation of the quasiparticle dispersion relation E(k) as a function of exciton source j in the same system, employing partially twisted boundary conditions to boost the number of available momentum modes. The Fermi momentum k_F and superfluid gap Delta are extracted in the limit j tends to zero for three different values of mu, and support a strongly interacting scenario at the Fermi surface with Delta of order O(mu). We propose an explanation for the observation mu < k_F in terms of a dynamical critical exponent z < 1.

  18. Geophys. J. Int. (1995) 121, 301-315 Multicomponent near-surface correction for land VSP data

    E-Print Network [OSTI]

    Edinburgh, University of

    1995-01-01

    , vertical seismic profile. 1 I N T R O D U C T I O N Combined seismic analysis of compressional- and shear seismic profile (VSP). Near-surface correction, using a simple matrix operator designed from 1994 March 31 SUMMARY Multicomponent seismic data collected using directional sources are degraded

  19. Laboratory investigations of the interaction between benzene and bare silicate grain surfaces

    E-Print Network [OSTI]

    J. D. Thrower; M. P. Collings; F. J. M. Rutten; M. R. S. McCoustra

    2008-12-17

    Experimental results on the thermal desorption of benzene (C6H6) from amorphous silica (SiO2) are presented. The amorphous SiO2 substrate was imaged using atomic force microscopy (AFM), revealing a surface morphology reminiscent of that of interplanetary dust particles (IDPs). Temperature programmed desorption (TPD) experiments were conducted for a wide range of C6H6 exposures, yielding information on both C6H6-SiO2 interactions and the C6H6-C6H6 interactions present in the bulk C6H6 ice. The low coverage experiments reveal complicated desorption behaviour that results both from porosity and roughness in the SiO2 substrate, and repulsive interactions between C6H6 molecules. Kinetic parameters were obtained through a combination of direct analysis of the TPD traces and kinetic modelling, demonstrating the coverage dependence of both desorption energy and pre-exponential factor. Experiments were also performed whereby the pores were blocked by pre-exposure of the SiO2 to water vapour. C6H6 was observed to be adsorbed preferentially on the SiO2 film not covered by H2O at the temperature at which these experiments were performed. This observation means that intermolecular repulsion likely becomes important at smaller C6H6 exposures on grains with a H2O mantle. Kinetic modelling of C6H6 multilayer desorption yields kinetic parameters in good agreement with previous studies, with the SiO2 having little impact on the desorption beyond the first few layers.

  20. A modelling approach to carbon, water and energy feedbacks and interactions across the land-atmosphere interface. 

    E-Print Network [OSTI]

    Hill, Timothy C

    2007-01-01

    The climate is changing and the rate of this change is expected to increase. In the 20th century global surface temperatures rose by 0.6 (±0.2) K. Based on current model predictions, and economic forecasts, global temperature ...

  1. Near-surface remote sensing of canopy architecture and land-atmosphere interactions in an oak savanna ecosystem

    E-Print Network [OSTI]

    Ryu, Youngryel

    2010-01-01

    physical properties alter water and energy fluxes of an oak-A decade of carbon, water and energy flux measurements of anWater and energy.

  2. Atmosphere-Land-Surface Interaction over the Southern Great Plains: Diagnosis of Mechanisms from SGP ARM Data

    SciTech Connect (OSTI)

    Sumant Nigam

    2013-02-01

    Work reported included analysis of pentad (5 day) averaged data, proposal of a hypothesis concerning the key role of the Atlantic Multi-decadal Oscillation in 20th century drought and wet periods over the Great Plains, analysis of recurrent super-synoptic evolution of the Great Plains low-level jet, and study of pentad evolution of the 1988 drought and 1993 flood over the Great Plains from a NARR perspective on the atmospheric and terrestrial water balance.

  3. Near-surface remote sensing of canopy architecture and land-atmosphere interactions in an oak savanna ecosystem

    E-Print Network [OSTI]

    Ryu, Youngryel

    2010-01-01

    sensor, built with light emitting diodes (LEDs), to monitorSun photometer with light emitting diodes as spectrallySen, C. (2009). Light emitting diode as sensor for miniature

  4. The impact of groundwater-land surface interactions on hydrologic persistence in macroscale Elizabeth A. Clark and Dennis P. Lettenmaier

    E-Print Network [OSTI]

    Washington at Seattle, University of

    and Energy Fluxes for GSMs, J. Geophys. Res., 99(D7), 14,415-14,428. Niu, G.-Y., Z.-L. Yang, R.E. Dickinson and evaluation with Gravity Recovery and Climate Experiment data, J. Geophys. Res., 112, D07103, doi:10 f = decay factor Ka = hydraulic conductivity h = matric potential+ gravity (elevation) potential z

  5. Near-surface remote sensing of canopy architecture and land-atmosphere interactions in an oak savanna ecosystem

    E-Print Network [OSTI]

    Ryu, Youngryel

    2010-01-01

    MODIS satellite data. Remote Sensing of Environment, 106,a joint flux tower, remote sensing and modelling analysis.of the algorithm. Remote Sensing of Environment, 110,

  6. ER2 Instrumentation and Measurements for CLASIC (Cloud Land Surface Interaction Campaign) June-2007 SGP {Author-Jimmy Voyles}

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submitKansas Nuclear Profile 2010Mesoscopy and thermodynamics L. G.About Us »

  7. A reduced-order modeling approach to represent subgrid-scale hydrological dynamics for land-surface simulations: application in a polygonal tundra landscape

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Pau, G. S. H.; Bisht, G.; Riley, W. J.

    2014-09-17

    Existing land surface models (LSMs) describe physical and biological processes that occur over a wide range of spatial and temporal scales. For example, biogeochemical and hydrological processes responsible for carbon (CO2, CH4) exchanges with the atmosphere range from the molecular scale (pore-scale O2 consumption) to tens of kilometers (vegetation distribution, river networks). Additionally, many processes within LSMs are nonlinearly coupled (e.g., methane production and soil moisture dynamics), and therefore simple linear upscaling techniques can result in large prediction error. In this paper we applied a reduced-order modeling (ROM) technique known as "proper orthogonal decomposition mapping method" that reconstructs temporally resolvedmore »fine-resolution solutions based on coarse-resolution solutions. We developed four different methods and applied them to four study sites in a polygonal tundra landscape near Barrow, Alaska. Coupled surface–subsurface isothermal simulations were performed for summer months (June–September) at fine (0.25 m) and coarse (8 m) horizontal resolutions. We used simulation results from three summer seasons (1998–2000) to build ROMs of the 4-D soil moisture field for the study sites individually (single-site) and aggregated (multi-site). The results indicate that the ROM produced a significant computational speedup (> 103) with very small relative approximation error (« less

  8. A reduced order modeling approach to represent subgrid-scale hydrological dynamics for regional- and climate-scale land-surface simulations: application in a polygonal tundra landscape

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Pau, G. S. H.; Bisht, G.; Riley, W. J.

    2014-04-04

    Existing land surface models (LSMs) describe physical and biological processes that occur over a wide range of spatial and temporal scales. For example, biogeochemical and hydrological processes responsible for carbon (CO2, CH4) exchanges with the atmosphere range from molecular scale (pore-scale O2 consumption) to tens of kilometer scale (vegetation distribution, river networks). Additionally, many processes within LSMs are nonlinearly coupled (e.g., methane production and soil moisture dynamics), and therefore simple linear upscaling techniques can result in large prediction error. In this paper we applied a particular reduced-order modeling (ROM) technique known as "Proper Orthogonal Decomposition mapping method" that reconstructs temporally-resolvedmore »fine-resolution solutions based on coarse-resolution solutions. We applied this technique to four study sites in a polygonal tundra landscape near Barrow, Alaska. Coupled surface-subsurface isothermal simulations were performed for summer months (June–September) at fine (0.25 m) and coarse (8 m) horizontal resolutions. We used simulation results from three summer seasons (1998–2000) to build ROMs of the 4-D soil moisture field for the four study sites individually (single-site) and aggregated (multi-site). The results indicate that the ROM produced a significant computational speedup (> 103) with very small relative approximation error (« less

  9. Aware surfaces : large-scale, surface-based sensing for new modes of data collection, analysis, and human interaction

    E-Print Network [OSTI]

    Goodman, Daniel Hayim

    2015-01-01

    This thesis describes the design and construction of pressure sensing matrices for capturing human location and activity data from large surfaces in a space such as the floors, walls, tabletops, countertops, and furniture. ...

  10. Helical Peptide Arrays on Self-Assembled Monolayer Surfaces Through Soft and Reactive Landing of Mass-Selected Ions

    SciTech Connect (OSTI)

    Wang, Peng; Laskin, Julia

    2008-08-01

    The ?-helix – the common building block of the protein secondary structure - plays an important role in determining protein structure and function. The biological function of the ?-helix is mainly attributed to its large macrodipole originating from the alignment of individual dipole moments of peptide bonds. Preparation of directionally aligned ?-helical peptide layers on substrates has attracted significant attention because the resulting strong net dipole is useful for a variety of applications in photonics, , molecular electronics, and catalysis. - In addition, conformationally-selected ?-helical peptide arrays can be used for detailed characterization of molecular recognition steps critical for protein folding, enzyme function and DNA binding by proteins. Existing technologies for the production of ?-helical peptide surfaces are based on a variety of solution phase synthetic strategies - that usually require relatively large quantities of purified materials.

  11. Measurement of spin-flip probabilities for ultracold neutrons interacting with nickel phosphorus coated surfaces

    E-Print Network [OSTI]

    Z. Tang; E. R. Adamek; A. Brandt; N. B. Callahan; S. M. Clayton; S. A. Currie; T. M. Ito; M. Makela; Y. Masuda; C. L. Morris; R. Pattie Jr.; J. C. Ramsey; D. J. Salvat; A. Saunders; A. R. Young

    2015-10-23

    We report a measurement of the spin-flip probabilities for ultracold neutrons interacting with surfaces coated with nickel phosphorus. For 50 $\\mu$m thick nickel phosphorus coated on stainless steel, the spin-flip probability per bounce was found to be $\\beta_{\\rm NiP\\;on\\;SS} = (3.3^{+1.8}_{-5.6}) \\times 10^{-6}$. For 50 $\\mu$m thick nickel phosphorus coated on aluminum, the spin-flip probability per bounce was found to be $\\beta_{\\rm NiP\\;on\\;Al} = (3.6^{+2.1}_{-5.9}) \\times 10^{-6}$. For the copper guide used as reference, the spin flip probability per bounce was found to be $\\beta_{\\rm Cu} = (6.7^{+5.0}_{-2.5}) \\times 10^{-6}$. Nickel phosphorus coated stainless steel or aluminum provides a solution when UCN guides that have a high Fermi potential and are low-cost, mechanically robust, and non-depolarizing are needed.

  12. Project Summary The interaction between the uplift of the earth's surface and climate change has been a topic

    E-Print Network [OSTI]

    Gregory-Wodzicki, Kathryn M.

    Project Summary The interaction between the uplift of the earth's surface and climate change has America, particularly in the english-language literature. However, the uplift history of the Andes of uplift and climate. We propose to investigate this topic by conducting the following research: · We

  13. Interaction of Streptavidin-Based Peptide-MHC Oligomers (Tetramers) with Cell-Surface T Cell Receptors

    E-Print Network [OSTI]

    Stone, Jennifer D.

    he binding of oligomeric peptide–MHC (pMHC) complexes to cell surface TCR can be considered to approximate TCR–pMHC interactions at cell-cell interfaces. In this study, we analyzed the equilibrium binding of streptavidin-based ...

  14. Topology of surfaces for molecular Stark energy, alignment and orientation generated by combined permanent and induced electric dipole interactions

    E-Print Network [OSTI]

    Burkhard Schmidt; Bretislav Friedrich

    2013-12-20

    We show that combined permanent and induced electric dipole interactions of polar and polarizable molecules with collinear electric fields lead to a sui generis topology of the corresponding Stark energy surfaces and of other observables - such as alignment and orientation cosines - in the plane spanned by the permanent and induced dipole interaction parameters. We find that the loci of the intersections of the surfaces can be traced analytically and that the eigenstates as well as the number of their intersections can be characterized by a single integer index. The value of the index, distinctive for a particular ratio of the interaction parameters, brings out a close kinship with the eigenproperties obtained previously for a class of Stark states via the apparatus of supersymmetric quantum mechanics.

  15. Interaction mechanisms of near-surface quantum wells with oxidized and H-passivated AlGaAs surfaces

    E-Print Network [OSTI]

    Presilla, Carlo

    the tunneling barrier, extending into the well; (iv) hydrogenation efficiently passivates electron trapping September 1993; accepted for publication 25 January 1994) The tunneling mechanism of electrons and holes-consistent quantum-mechanical approach. 1. INTRODUCTION The tunneling of electrons and holes to surface states (SS

  16. Land-ocean contrasts under climate change

    E-Print Network [OSTI]

    Byrne, Michael P

    2015-01-01

    Observations and climate models show a pronounced land-ocean contrast in the responses of surface temperature and the hydrological cycle to global warming: Land temperatures increase more than ocean temperatures, low-level ...

  17. The Impact of Interactive Tables and Multiple Surfaces Technologies Towards Communication and Learning

    E-Print Network [OSTI]

    Subramanian, Sriram

    , UK jamil@cs.bris.ac.uk Sriram Subramanian Interaction & Graphics Group Department of Computer Science University of Bristol, UK sriram@cs.bris.ac.uk ABSTRACT Multi-touch interactive tables are vast becoming

  18. Modifying atom-surface interactions with optical fields John D. Perreault

    E-Print Network [OSTI]

    Cronin, Alex D.

    W interaction can be affected by the radiation environment that the matter resides in, opening the exciting to thermal radiation, and 3 modifications to the ordinary vdW interaction that result from monochromatic of the van der Waals vdW interaction be- tween matter is usually determined by the atomic or bulk material

  19. Surface-supported Ag islands stabilized by a quantum size effect: Their interaction with small molecules relevant to ethylene epoxidation

    SciTech Connect (OSTI)

    Shao, Dahai

    2013-05-15

    This dissertation focuses on how QSE-stabilized, surface-supported Ag nanoclusters will interact with ethylene or oxygen. Experiments are performed to determine whether the QSE-mediated Ag islands react differently toward adsorption of ethylene or oxygen, or whether the adsorption of these small molecules will affect the QSE-mediated stability of Ag islands. Studies of the interaction of oxygen with Ag/Si(111)-7×7 were previously reported, but these studies were performed at a low Ag coverage where 3D Ag islands were not formed. So the study of such a system at a higher Ag coverage will be a subject of this work. The interaction of ethylene with Ag/Si(111)-7×7, as well as the interaction of oxygen with Ag/NiAl(110) are also important parts of this study.

  20. A tribological study of the interaction between surface micro texturing and viscoelastic lubricants

    E-Print Network [OSTI]

    Hupp, Sara J. (Sara Jean), 1979-

    2004-01-01

    An experimental study is performed on micro textured surfaces using both elastic and Newtonian fluids in order to understand the effect of surface texturing and fluid rheology on sliding friction under lubricated conditions. ...

  1. Surface studies on aluminized and thermally oxidized superalloy 690 substrates interacted with simulated nuclear waste and sodium borosilicate melt

    SciTech Connect (OSTI)

    Yusufali, C. Sengupta, P.; Dutta, R. S.; Dey, G. K.; Kshirsagar, R. J.; Mishra, R. K.; Kaushik, C. P.

    2014-04-24

    Aluminized and thermally oxidized Ni-Cr-Fe based superalloy 690 substrates with Al{sub 2}O{sub 3} layer on top have been exposed in nitrate based environment (simulated high level nuclear liquid waste) at 373 K for 216 hours and sodium borosilicate melt at 1248 K for 192 hours. The surfaces of exposed samples have been characterized by using Electron probe micro-analyzer (EPMA). Elemental X-ray mapping on coated specimen that exposed in simulated nuclear waste solution revealed that the surface is enriched with Ni, Cr and Al. X-ray mapping on surface of the specimen that interacted with sodium borosilicate melt indicated that the surface is composed of Al, Fe, Ni and Cr.

  2. Molecular dynamics simulations of low-energy ,,25200 eV... argon ion interactions with silicon surfaces: Sputter yields and product

    E-Print Network [OSTI]

    Economou, Demetre J.

    Molecular dynamics simulations of low-energy ,,25­200 eV... argon ion interactions with silicon surfaces: Sputter yields and product formation pathways Nawoyuki A. Kubota and Demetre J. Economoua) Plasma energy ( 200 eV ion interactions with surfaces. In particular, atomic layer etching requires etching

  3. Multifunctional ultra-high vacuum apparatus for studies of the interactions of chemical warfare agents on complex surfaces

    SciTech Connect (OSTI)

    Wilmsmeyer, Amanda R.; Morris, John R. [Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061 (United States)] [Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061 (United States); Gordon, Wesley O.; Mantooth, Brent A.; Lalain, Teri A. [Research and Technology Directorate, U.S. Army Edgewood Chemical Biological Center, Aberdeen Proving Ground, Maryland 21010 (United States)] [Research and Technology Directorate, U.S. Army Edgewood Chemical Biological Center, Aberdeen Proving Ground, Maryland 21010 (United States); Davis, Erin Durke [OptiMetrics, Inc., Abingdon, Maryland 21009 (United States)] [OptiMetrics, Inc., Abingdon, Maryland 21009 (United States)

    2014-01-15

    A fundamental understanding of the surface chemistry of chemical warfare agents is needed to fully predict the interaction of these toxic molecules with militarily relevant materials, catalysts, and environmental surfaces. For example, rules for predicting the surface chemistry of agents can be applied to the creation of next generation decontaminants, reactive coatings, and protective materials for the warfighter. Here, we describe a multifunctional ultra-high vacuum instrument for conducting comprehensive studies of the adsorption, desorption, and surface chemistry of chemical warfare agents on model and militarily relevant surfaces. The system applies reflection-absorption infrared spectroscopy, x-ray photoelectron spectroscopy, and mass spectrometry to study adsorption and surface reactions of chemical warfare agents. Several novel components have been developed to address the unique safety and sample exposure challenges that accompany the research of these toxic, often very low vapor pressure, compounds. While results of vacuum-based surface science techniques may not necessarily translate directly to environmental processes, learning about the fundamental chemistry will begin to inform scientists about the critical aspects that impact real-world applications.

  4. Fluctuating Surface Currents: A New Algorithm for Efficient Prediction of Casimir Interactions among Arbitrary Materials in Arbitrary Geometries. I. Theory

    E-Print Network [OSTI]

    M. T. Homer Reid; Jacob White; Steven G. Johnson

    2012-07-12

    This paper presents a new method for the efficient numerical computation of Casimir interactions between objects of arbitrary geometries, composed of materials with arbitrary frequency-dependent electrical properties. Our method formulates the Casimir effect as an interaction between effective electric and magnetic current distributions on the surfaces of material bodies, and obtains Casimir energies, forces, and torques from the spectral properties of a matrix that quantifies the interactions of these surface currents. The method can be formulated and understood in two distinct ways: \\textbf{(1)} as a consequence of the familiar \\textit{stress-tensor} approach to Casimir physics, or, alternatively, \\textbf{(2)} as a particular case of the \\textit{path-integral} approach to Casimir physics, and we present both formulations in full detail. In addition to providing an algorithm for computing Casimir interactions in geometries that could not be efficiently handled by any other method, the framework proposed here thus achieves an explicit unification of two seemingly disparate approaches to computational Casimir physics.

  5. Atomic Force Microscope Based Near-field Imaging for Probing Cell Surface Interactions 

    E-Print Network [OSTI]

    Amini, Sina

    2013-03-26

    on the microsphere surface. For the EF technique, quantum dot (QD)-embedded polystyrene microspheres were used to couple light into whispering gallery modes (WGMs) inside the microspheres; the resulting EF at the surface of the microsphere was used as a near...

  6. EVIDENCE OF INTERACTION BETWEEN SYNOPTIC AND LOCAL SCALES IN THE SURFACE LAYER OVER THE PARIS AREA

    E-Print Network [OSTI]

    Menut, Laurent

    -hydrostatic mesoscale model MERCURE restricted to a small domain. This `column' model uses existing state-of-the-art surface-layer parameterizations (the addition of the convective velocity scale to the mean wind speed meteorological factors affecting urban air quality. Keywords: Surface layer, Roughness length, Sonic anemometer

  7. Radio-frequency sheath-plasma interactions with magnetic field tangency points along the sheath surface

    SciTech Connect (OSTI)

    Kohno, H. [Department of Physics, Lehigh University, 16 Memorial Drive East, Bethlehem, Pennsylvania 18015 (United States)] [Department of Physics, Lehigh University, 16 Memorial Drive East, Bethlehem, Pennsylvania 18015 (United States); Myra, J. R.; D'Ippolito, D. A. [Lodestar Research Corporation, 2400 Central Avenue P-5, Boulder, Colorado 80301 (United States)] [Lodestar Research Corporation, 2400 Central Avenue P-5, Boulder, Colorado 80301 (United States)

    2013-08-15

    Computer simulations of radio-frequency (RF) waves propagating across a two-dimensional (2D) magnetic field into a conducting boundary are described. The boundary condition for the RF fields at the metal surface leads to the formation of an RF sheath, which has previously been studied in one-dimensional models. In this 2D study, it is found that rapid variation of conditions along the sheath surface promote coupling of the incident RF branch (either fast or slow wave) to a short-scale-length sheath-plasma wave (SPW). The SPW propagates along the sheath surface in a particular direction dictated by the orientation of the magnetic field with respect to the surface, and the wave energy in the SPW accumulates near places where the background magnetic field is tangent to the surface.

  8. Biosphere-atmosphere interactions over semi-arid regions : modeling the role of mineral aerosols and irrigation in the regional climate system

    E-Print Network [OSTI]

    Marcella, Marc Pace

    2013-01-01

    This dissertation describes the role of land surface processes in shaping semi-arid climates, namely those of Southwest Asia and Northwest Africa. The interactions between dust emissions, irrigation, and climate processes ...

  9. Direct measurements of ensemble particle and surface interactions on homogeneous and patterned substrates 

    E-Print Network [OSTI]

    Wu, Hung-Jen

    2006-08-16

    range particle-particle attraction and recovery of the expected DLVO particle-wall interactions for all concentrations examined. The possible influence of charge heterogeneity and particle size polydispersity on measured distribution functions...

  10. Study of Interfacial Interactions Using Thing Film Surface Modification: Radiation and Oxidation Effects in Materials

    SciTech Connect (OSTI)

    Sridharan, Kumar; Zhang, Jinsuo

    2014-01-09

    Interfaces play a key role in dictating the long-term stability of materials under the influence of radiation and high temperatures. For example, grain boundaries affect corrosion by way of providing kinetically favorable paths for elemental diffusion, but they can also act as sinks for defects and helium generated during irradiation. Likewise, the retention of high-temperature strength in nanostructured, oxide-dispersion strengthened steels depends strongly on the stoichiometric and physical stability of the (Y, Ti)-oxide particles/matrix interface under radiation and high temperatures. An understanding of these interfacial effects at a fundamental level is important for the development of materials for extreme environments of nuclear reactors. The goal of this project is to develop an understanding stability of interfaces by depositing thin films of materials on substrates followed by ion irradiation of the film-substrate system at elevated temperatures followed by post-irradiation oxidation treatments. Specifically, the research will be performed by depositing thin films of yttrium and titanium (~500 nm) on Fe-12%Cr binary alloy substrate. Y and Ti have been selected as thin-film materials because they form highly stable protective oxides layers. The Fe-12%Cr binary alloy has been selected because it is representative of ferritic steels that are widely used in nuclear systems. The absence of other alloying elements in this binary alloy would allow for a clearer examination of structures and compositions that evolve during high-temperature irradiations and oxidation treatments. The research is divided into four specific tasks: (1) sputter deposition of 500 nm thick films of Y and Ti on Fe-12%Cr alloy substrates, (2) ion irradiation of the film-substrate system with 2MeV protons to a dose of 2 dpa at temperatures of 300°C, 500°C, and 700°C, (3) oxidation of as-deposited and ion-irradiated samples in a controlled oxygen environment at 500°C and 700°C, (4) multi-scale computational modeling involving first- principle molecular dynamics (FPMD) and coarse-grained dissipative particle dynamics (DPD) approaches to develop theories underlying the evolution and stability of structures and phases. Samples from Tasks 1 to 3 (above) will be rigorously characterized and analyzed using scanning electron microscopy, Auger electron microscopy, x-ray diffraction, Rutherford back scatter spectroscopy, and transmission electron microscopy. Expected outcomes of the experimental work include a quantitative understanding film-substrate interface mixing, evolution of defects and other phases at the interface, interaction of interfaces with defects, and the ability of the Y and Ti films to mitigate irradiation-assisted oxidation.The aforementioned experimental work will be closely coupled with multi-scale molecular dynamics (MD) modeling to understand the reactions at the surface, the transport of oxidant through the thin film, and the stabilities of the deposited thin films under radiation and oxidation. Simulations of materials property changes under conditions of radiation and oxidation require multiple size domains and a different simulation scheme for each of these domains. This will be achieved by coupling the FPMD and coarse-grained kinetic Monte Carlo (KMC). This will enable the comparison of the results of each simulation approach with the experimental results.

  11. Interaction Forces Measured Using AFM between Colloids and Surfaces Coated with Both Dextran and Protein

    E-Print Network [OSTI]

    a large proportion of polysaccharides. Proteins released by bacteria into solution can be rapidly adsorbed at a surface and can promote bacterial adhesion and the continuous secretion of proteins by bacteria during

  12. Groundwater Surface Water Interactions in a Gold-mined Floodplain of the Merced River

    E-Print Network [OSTI]

    Sullivan, Lynn Sager

    2013-01-01

    of small ponds on stream water chemistry. Lake and ReservoirSpeciation of iron in river water using a specific catalyticin surface-subsurface water exchange and lateral hyporheic

  13. Modeling the Interaction between Integrin-Binding Peptide (RGD) and Rutile Surface: The Effect of Na+ on Peptide Adsorption

    SciTech Connect (OSTI)

    Wu, Chunya; Skelton, Adam; Chen, Mingjun; Vlcek, Lukas; Cummings, Peter T

    2011-01-01

    The dynamics of a single tripeptide Arg-Gly-Asp (RGD) adsorbing onto negatively charged hydroxylated rutile (110) surface in aqueous solution was studied using molecular dynamics (MD) simulations. The results indicate that the adsorbed Na{sup +} ions play an important role in determining the binding geometry of RGD. With an initial 'horseshoe' configuration, the charged side groups (COO{sup -} and NH{sub 2}) of the peptide are able to interact with the surface through direct hydrogen bonds (H bonds) in the very early stage of adsorption. The Na{sup +} ions approach the positively charged Arg side chain, competing with the Arg side chain for adsorption to the negatively charged hydroxyl oxygen. In coordination with the structural adjustment of the peptide, the Arg residue is driven to detach from the rutile surface. In contrast, the Na+ ions in close proximity to the negatively charged Asp side chain contribute to the binding of the COO{sup -} group on the surface, helping the carboxyl oxygen not involved in COO{sup -}-surface H bonds to orientate toward the hydroxyl hydrogens. Once both carboxyl oxygens form enough H bonds with the hydroxyl hydrogens, the redundant ions move toward a more favorable adsorption site.

  14. First-principles study on the interaction of nitrogen atom with ?–uranium: From surface adsorption to bulk diffusion

    SciTech Connect (OSTI)

    Su, Qiulei; Deng, Huiqiu, E-mail: hqdeng@hnu.edu.cn, E-mail: hqdeng@gmail.com; Xiao, Shifang; Li, Xiaofan; Hu, Wangyu [Department of Applied Physics, Hunan University, Changsha 410082 (China); Ao, Bingyun; Chen, Piheng [Science and Technology on Surface Physics and Chemistry Laboratory, P.O. Box 718-35, Mianyang 621907 (China)

    2014-04-28

    Experimental studies of nitriding on uranium surfaces show that the modified layers provide considerable protection against air corrosion. The bimodal distribution of nitrogen is affected by both its implantation and diffusion, and the diffusion of nitrogen during implantation is also governed by vacancy trapping. In the present paper, nitrogen adsorption, absorption, diffusion, and vacancy trapping on the surface of and in the bulk of ?–uranium are studied with a first-principles density functional theory approach and the climbing image nudged elastic band method. The calculated results indicate that, regardless of the nitrogen coverage, a nitrogen atom prefers to reside at the hollow1 site and octahedral (Oct) site on and below the surface, respectively. The lowest energy barriers for on-surface and penetration diffusion occur at a coverage of 1/2 monolayer. A nitrogen atom prefers to occupy the Oct site in bulk ?–uranium. High energy barriers are observed during the diffusion between neighboring Oct sites. A vacancy can capture its nearby interstitial nitrogen atom with a low energy barrier, providing a significant attractive nitrogen-vacancy interaction at the trapping center site. This study provides a reference for understanding the nitriding process on uranium surfaces.

  15. Electrostatic interactions in the presence of surface charge regulation: exact results

    E-Print Network [OSTI]

    A. C. Maggs; R. Podgornik

    2014-10-01

    We study the problem of charge regulation and its effects on electrostatic interactions between dissociable charge groups immersed in a univalent electrolyte, within a family of one dimensional exactly solvable models. We consider the case of both charge regulated plates, but also the interaction of pairs of finite size dielectric "particles". Using the transfer matrix formalism we are able to determine the disjoining pressure as well as the correlations between the charge and the dipole moments of the objects as a function of their separation and electrolyte concentration

  16. Interaction of a Polyelectrolyte Solution with an Attractive Surface Kate Barteau

    E-Print Network [OSTI]

    Shell, M. Scott

    studied a simplified system of a semi-dilute polymer electrolyte solution and its behavior near an oppositely charged surface using molecular dynamics (MD) simulations. Polymers were simulated as 6-12 Lennard with an attractive wall has been carried out through molecular dynamics simulations. Total charge density along

  17. Cation Size Mismatch and Charge Interactions Drive Dopant Segregation at the Surfaces of Manganite Perovskites

    E-Print Network [OSTI]

    Yildiz, Bilge

    applications, including solid oxide fuel cells,1-9 oxygen permeation membranes,10,11 batteries,12 and stability of solid oxide fuel cell (SOFC) cathodes. A unified theory that explains the physical origins on perovskite oxide surfaces impacts tremendously the reactivity and stability of solid oxide fuel cell (SOFC

  18. Localized surface plasmon and exciton interaction in silver-coated cadmium sulphide quantum dots

    SciTech Connect (OSTI)

    Ghosh, P.; Rustagi, K. C.; Vasa, P.; Singh, B. P.

    2015-05-15

    Localized surface plasmon and exciton coupling has been investigated on colloidal solutions of silver-coated CdS nanoparticles (NPs), synthesized by gamma irradiation. Two broad photoluminescence (PL) bands (blue/red) corresponding to band to band and defect state transitions have been observed for the bare and coated samples. In case of bare CdS NPs, the intensity of the red PL peak is about ten times higher than the blue PL peak intensity. However, on coating the CdS NPs with silver, the peak intensity of the blue PL band gets enhanced and becomes equal to that of the red PL band. High-resolution transmission electron microscopic (HRTEM) images adequately demonstrate size distribution of these metal/semiconductor nanocomposites. UV-Vis absorption studies show quantum confinement effect in these semiconductor quantum dot (SQD) systems. Absorption spectrum of silver-coated SQDs shows signature of surface plasmon-exciton coupling which has been theoretically verified.

  19. Interaction of mineral surfaces with simple organci molecules by diffuse reflectance IR spectroscopy (DRIFT)

    SciTech Connect (OSTI)

    Joan Thomas; Michael Kelley

    2007-06-18

    Diffuse reflectance Fourier-transform infrared spectroscopy (DRIFTS) was used to characterize multi-layers of lysine, glutamic acid and salicylic acid on ?-alumina and kaolinite surfaces. The results agreed well with those previously obtained by ATR-IR in aqueous media where available, indicating that DRIFT may be regarded as effectively an in-situ spectroscopy for these materials. In the case of salicylic acid adsorption onto ?-alumina, DRIFTS was used to identify monolayer coverage and to detect molecules down to coverage of 3% of a monolayer. The spectroscopic results as to coverage were confirmed by analysis of the solutions used for treatment. The spectra obtained allowed identification of changes in the bonding environment with increasing surface coverage. DRIFTS, offers several advantages in terms of materials, experimental technique and data treatment, motivating further investigations.

  20. Addressing the challenges of plasma-surface interactions in NSTX-U*

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kaita, Robert [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Abrams, Tyler [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Jaworski, Michael [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Lucia, Matthew [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Nichols, Jacob H. [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Skinner, Charles H. [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Stotler, Daren [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Allain, Jean Paul [University of Illinois, Urbana, IL (United States); Bedoya, Felipe [University of Illinois, Urbana, IL (United States)

    2015-04-01

    The importance of conditioning plasma-facing components (PFCs) has long been recognized as a critical element in obtaining high-performance plasmas in magnetic confinement devices. Lithium coatings, for example, have been used for decades for conditioning PFCs. Since the initial studies on the Tokamak Fusion Test Reactor, experiments on devices with different aspect ratios and magnetic geometries like the National Spherical Torus Experiment (NSTX) continue to show the relationship between lithium PFCs and good confinement and stability. While such results are promising, their empirical nature do not reflect the detailed relationship between PFCs and the dynamic conditions that occur in the tokamak environment. A first step developing an understanding such complexity will be taken in the upgrade to NSTX (NSTX-U) that is nearing completion. New measurement capabilities include the Materials Analysis and Particle Probe (MAPP) for in situ surface analysis of samples exposed to tokamak plasmas. The OEDGE suite of codes, for example, will provide a new way to model the underlying mechanisms for such material migration in NSTX-U. This will lead to a better understanding of how plasma-facing surfaces evolve during a shot, and how the composition of the plasma facing surface influences the discharge performance we observe. This paper will provide an overview of these capabilities, and highlight their importance for NSTX-U plans to transition from carbon to high-Z PFCs.

  1. Addressing the challenges of plasma-surface interactions in NSTX-U*

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kaita, Robert; Abrams, Tyler; Jaworski, Michael; Lucia, Matthew; Nichols, Jacob H.; Skinner, Charles H.; Stotler, Daren; Allain, Jean Paul; Bedoya, Felipe

    2015-04-01

    The importance of conditioning plasma-facing components (PFCs) has long been recognized as a critical element in obtaining high-performance plasmas in magnetic confinement devices. Lithium coatings, for example, have been used for decades for conditioning PFCs. Since the initial studies on the Tokamak Fusion Test Reactor, experiments on devices with different aspect ratios and magnetic geometries like the National Spherical Torus Experiment (NSTX) continue to show the relationship between lithium PFCs and good confinement and stability. While such results are promising, their empirical nature do not reflect the detailed relationship between PFCs and the dynamic conditions that occur in the tokamakmore »environment. A first step developing an understanding such complexity will be taken in the upgrade to NSTX (NSTX-U) that is nearing completion. New measurement capabilities include the Materials Analysis and Particle Probe (MAPP) for in situ surface analysis of samples exposed to tokamak plasmas. The OEDGE suite of codes, for example, will provide a new way to model the underlying mechanisms for such material migration in NSTX-U. This will lead to a better understanding of how plasma-facing surfaces evolve during a shot, and how the composition of the plasma facing surface influences the discharge performance we observe. This paper will provide an overview of these capabilities, and highlight their importance for NSTX-U plans to transition from carbon to high-Z PFCs.« less

  2. Interactions Between the Daytime Mixed Layer and the Surface: Oklahoma Mesonet and EBBR Heat Fluxes

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACT EVALUATION PLANIs gravityIntellectualInteractions Between the Daytime

  3. Since Iceland was settled 1100 y ago, declines in vegetated land cover has been accompanied by severe wind and water erosion. Interaction of

    E-Print Network [OSTI]

    Archer, Steven R.

    Since Iceland was settled 1100 y ago, declines in vegetated land cover has been accompanied microtopography (i.e. hummock shape and size). DEGRADATION OF ICELANDIC RANGELANDS: PROCESSESS AND PROPERTIES J&M University, College Station, 2Soil Conservation Service, Gunnarsholt, Iceland, 3Agricultural Research

  4. Mechanisms of Radionuclide-Hyroxycarboxylic Acid Interactions for Decontamination of Metallic Surfaces

    SciTech Connect (OSTI)

    A.J. Francis; C.J. Dodge; J.B. Gillow; G.P. Halada; C.R. Clayton

    2002-04-24

    Is this EMSP program we investigated the key fundamental issues involved in the use of simple and safe methods for the removal of radioactive contamination from equipment and facilities using hydroxycarboxylic acids. Specifically, we investigate (i) the association of uranium with various iron oxides commonly formed on corroding plain carbon steel surfaces, (ii) the association of uranium with corroding metal coupons under a variety of conditions, and (iii) the decontamination of the uranium contaminated metal coupons by citric acid or citric acid formulations containing oxalic acid and hydrogen peroxide.

  5. Poisson-Boltzmann model for protein-surface electrostatic interactions and grid-convergence study using the PyGBe code

    E-Print Network [OSTI]

    Cooper, Christopher D

    2015-01-01

    Interactions between surfaces and proteins occur in many vital processes and are crucial in biotechnology: the ability to control specific interactions is essential in fields like biomaterials, biomedical implants and biosensors. In the latter case, biosensor sensitivity hinges on ligand proteins adsorbing on bioactive surfaces with a favorable orientation, exposing reaction sites to target molecules. Protein adsorption, being a free-energy-driven process, is difficult to study experimentally. This paper develops and evaluates a computational model to study electrostatic interactions of proteins and charged nanosurfaces, via the Poisson-Boltzmann equation. We extended the implicit-solvent model used in the open-source code PyGBe to include surfaces of imposed charge or potential. This code solves the boundary integral formulation of the Poisson-Boltzmann equation, discretized with surface elements. PyGBe has at its core a treecode-accelerated Krylov iterative solver, resulting in O(N log N) scaling, with furt...

  6. Combustion-turbulence interaction in the turbulent boundary layer over a hot surface

    SciTech Connect (OSTI)

    Ng, T.T.; Cheng, R.K.; Robben, F.; Talbot, L.

    1982-01-01

    The turbulence-combustion interaction in a reacting turbulent boundary layer over a heated flat plate was studied. Ethylene/air mixture with equivalence ratio of 0.35 was used. The free stream velocity was 10.5 m/s and the wall temperature was 1250/sup 0/K. Combustion structures visualization was provided by high-speed schlieren photographs. Fluid density statistics were deduced from Rayleigh scattering intensity measurements. A single-component laser Doppler velocimetry system was used to obtain mean and root-mean-square velocity distributions, the Reynolds stress, the streamwise and the cross-stream turbulent kinetic energy diffusion, and the production of turbulent kinetic energy by Reynolds stress. The combustion process was dominated by large-scale turbulent structures of the boundary layer. Combustion causes expansion of the boundary layer. No overall self-similarity is observed in either the velocity or the density profiles. Velocity fluctuations were increased in part of the boundary layer and the Reynolds stress was reduced. The turbulent kinetic energy diffusion pattern was changed significantly and a modification of the boundary layer assumption will be needed when dealing with this problem analytically. 11 figures, 1 table.

  7. Precipitation, Recycling, and Land Memory: An Integrated Analysis

    E-Print Network [OSTI]

    Dirmeyer, Paul A.

    A synthesis of several approaches to quantifying land–atmosphere interactions is presented. These approaches use data from observations or atmospheric reanalyses applied to atmospheric tracer models and stand-alone land ...

  8. Measuring Edinburgh’s Surface Urban Heat Island 

    E-Print Network [OSTI]

    Mackinnon, Kerr A H

    2013-10-27

    This project investigated Edinburgh’s surface urban heat island (SUHI) in relation to land cover and land use. Thermal channels of Landsat TM, Landsat ETM+ and ASTER imagery captured between 1999 and 2011 provide land surface temperatures (LST...

  9. Spectral behavior of the coupled land-atmosphere system

    E-Print Network [OSTI]

    Gentine, Pierre

    2010-01-01

    The main objective of this thesis is to understand the daily cycle of the energy coupling between the land and the atmosphere in response to a forcing of incoming radiation at their common boundary, the land surface. This ...

  10. Terry Land

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired Solar FuelTechnologyTel: Name: Rm. Tel: Location:TerrachanicsTerry Land

  11. Land Use and Land Cover Change

    SciTech Connect (OSTI)

    Brown, Daniel; Polsky, Colin; Bolstad, Paul V.; Brody, Samuel D.; Hulse, David; Kroh, Roger; Loveland, Thomas; Thomson, Allison M.

    2014-05-01

    A contribution to the 3rd National Climate Assessment report, discussing the following key messages: 1. Choices about land-use and land-cover patterns have affected and will continue to affect how vulnerable or resilient human communities and ecosystems are to the effects of climate change. 2. Land-use and land-cover changes affect local, regional, and global climate processes. 3. Individuals, organizations, and governments have the capacity to make land-use decisions to adapt to the effects of climate change. 4. Choices about land use and land management provide a means of reducing atmospheric greenhouse gas levels.

  12. Interactions of aqueous amino acids and proteins with the (110) surface of ZnS in molecular dynamics simulations

    SciTech Connect (OSTI)

    Nawrocki, Grzegorz; Cieplak, Marek

    2014-03-07

    The growing usage of nanoparticles of zinc sulfide as quantum dots and biosensors calls for a theoretical assessment of interactions of ZnS with biomolecules. We employ the molecular-dynamics-based umbrella sampling method to determine potentials of mean force for 20 single amino acids near the ZnS (110) surface in aqueous solutions. We find that five amino acids do not bind at all and the binding energy of the remaining amino acids does not exceed 4.3 kJ/mol. Such energies are comparable to those found for ZnO (and to hydrogen bonds in proteins) but the nature of the specificity is different. Cysteine can bind with ZnS in a covalent way, e.g., by forming the disulfide bond with S in the solid. If this effect is included within a model incorporating the Morse potential, then the potential well becomes much deeper—the binding energy is close to 98 kJ/mol. We then consider tryptophan cage, a protein of 20 residues, and characterize its events of adsorption to ZnS. We demonstrate the relevance of interactions between the amino acids in the selection of optimal adsorbed conformations and recognize the key role of cysteine in generation of lasting adsorption. We show that ZnS is more hydrophobic than ZnO and that the density profile of water is quite different than that forming near ZnO—it has only a minor articulation into layers. Furthermore, the first layer of water is disordered and mobile.

  13. Proceedings of US/Japan workshop, Q219 on high heat flux components and plasma surface interactions for next fusion devices

    SciTech Connect (OSTI)

    Ulrickson, M.A.; Stevens, P.L.; Hino, T.; Hirohata, Y.

    1996-12-01

    This report contains the viewgraphs from the proceedings of US/Japan Workshop on High Heat Flux Components and Plasma Surface Interactions for Next Fusion Devices. Some of the general topics covered by this report are: PFC/PSI in tokamak and helical devices; development of high heat flux components; PSIS and plasma facing materials;tritium; and material damage.

  14. Treatment of soil, vegetation and snow in land surface models: a test of the BiosphereAtmosphere Transfer Scheme with the

    E-Print Network [OSTI]

    Yang, Zong-Liang

    surface consists of soil, vegetation, snow, glaciers, inland waters, mountains, animals, human beings to study the complicated transfer or diffusion of energy, water and trace gases within each study object of Arizona, Tucson, AZ 85721, USA b Department of Hydrology and Water Resources, University of Arizona

  15. [Cell Adhesion & Migration 2:2, 13-94; April/May/June 2008]; 2008 Landes Bioscience Chemomechanical characteristics of the extracellular materials

    E-Print Network [OSTI]

    Van Vliet, Krystyn J.

    [Cell Adhesion & Migration 2:2, 13-94; April/May/June 2008]; ©2008 Landes Bioscience (ECM) stiffness and extracellular pH influ- ence the interaction between cell surface adhesion receptors and extracellular matrix ligands, and we predict potential consequences for focal adhesion

  16. Tuning the interaction between propagating and localized surface plasmons for surface enhanced Raman scattering in water for biomedical and environmental applications

    SciTech Connect (OSTI)

    Shioi, Masahiko; Jans, Hilde; Lodewijks, Kristof; Van Dorpe, Pol; Lagae, Liesbet; Kawamura, Tatsuro

    2014-06-16

    With a view to biomedical and environmental applications, we investigate the plasmonic properties of a rectangular gold nanodisk array in water to boost surface enhanced Raman scattering (SERS) effects. To control the resonance wavelengths of the surface plasmon polariton and the localized surface plasmon, their dependence on the array period and diameter in water is studied in detail using a finite difference time domain method. A good agreement is obtained between calculated resonant wavelengths and those of gold nanodisk arrays fabricated using electron beam lithography. For the optimized structure, a SERS enhancement factor of 7.8?×?10{sup 7} is achieved in water experimentally.

  17. MODIS Collection 5 global land cover: Algorithm refinements and characterization of new datasets

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    information is required to parameterize land surface processes in regional-to-global scale Earth system models

  18. The Surface Expression of Semidiurnal Internal Tides near a Strong Source at Hawaii. Part II: Interactions with Mesoscale Currents*

    E-Print Network [OSTI]

    ) ABSTRACT Observations of semidiurnal surface currents in the Kauai Channel, Hawaii, are interpreted of semidiurnal currents in the Kauai Channel (Chavanne et al. 2010, hereafter Part I) during the Hawaii OceanThe Surface Expression of Semidiurnal Internal Tides near a Strong Source at Hawaii. Part II

  19. Interaction of light with the ZnO surface: Photon induced oxygen “breathing,” oxygen vacancies, persistent photoconductivity, and persistent photovoltage

    SciTech Connect (OSTI)

    Gurwitz, Ron; Cohen, Rotem; Shalish, Ilan

    2014-01-21

    ZnO surfaces adsorb oxygen in the dark and emit CO{sub 2} when exposed to white light, reminiscent of the lungs of living creatures. We find that this exchange of oxygen with the ambient affects the integrity of the ZnO surface. Thus, it forms a basis for several interesting surface phenomena in ZnO, such as photoconductivity, photovoltage, and gas sensing, and has a role in ZnO electrical conduction. Using x-ray photoelectron spectroscopy on ZnO nanowires, we observed a decomposition of ZnO under white light and formation of oxygen-depleted surface, which explains photoconductivity by the electron donation of oxygen vacancies. Our findings suggest that the observed decomposition of the ZnO lattice may only take place due to photon-induced reduction of ZnO by carbon containing molecules (or carbo-photonic reduction), possibly from the ambient gas, accounting in a consistent way for both the reduced demands on the energy required for decomposition and for the observed emission of lattice oxygen in the form of CO{sub 2}. The formation of oxygen-vacancy rich surface is suggested to induce surface delta doping, causing accumulation of electrons at the surface, which accounts for both the increase in conductivity and the flattening of the energy bands. Using surface photovoltage spectroscopy in ultra high vacuum, we monitored changes in the deep level spectrum. We observe a wide optical transition from a deep acceptor to the conduction band, which energy position coincides with the position of the so called “green luminescence” in ZnO. This green transition disappears with the formation of surface oxygen vacancies. Since the oxygen vacancies are donors, while the green transition involves surface acceptors, the results suggest that the initial emission of oxygen originates at the defect sites of the latter, thereby eliminating each other. This suggests that the green transition originates at surface Zn vacancy acceptors. Removing an oxygen atom from a Zn vacancy completes the vacancy to become a full ZnO molecule vacancy, which does not produce deep levels. Our results explain why ZnO finds use as an electrical detector for oxygen and for carbon containing gas molecules. They may also shed new light on photocatalytic uses of ZnO. It is suggested that similar surface phenomena may affect other semiconducting oxides.

  20. Primitive Land Plants 37 PRIMITIVE LAND PLANTS

    E-Print Network [OSTI]

    Koptur, Suzanne

    appeared at this time. Both of these groups of plants had life cycles, involving two generations. One of the year these mosses will produce tiny sporophytes. Prior to this generation, the tiny plants producedPrimitive Land Plants 37 PRIMITIVE LAND PLANTS These are the plants that were present soon after

  1. Early Career. Harnessing nanotechnology for fusion plasma-material interface research in an in-situ particle-surface interaction facility

    SciTech Connect (OSTI)

    Allain, Jean Paul

    2014-08-08

    This project consisted of fundamental and applied research of advanced in-situ particle-beam interactions with surfaces/interfaces to discover novel materials able to tolerate intense conditions at the plasma-material interface (PMI) in future fusion burning plasma devices. The project established a novel facility that is capable of not only characterizing new fusion nanomaterials but, more importantly probing and manipulating materials at the nanoscale while performing subsequent single-effect in-situ testing of their performance under simulated environments in fusion PMI.

  2. NERC funded PhD project to start in 2013 Surface mixed layer physical/biological interactions at submesoscales

    E-Print Network [OSTI]

    Cambridge, University of

    Laboratory) A NERC-funded studentship is available from 1 October 2013 (or earlier subject to individual at Submesoscales (SMILES), is to study the impact of submesoscales on the formation rate and properties of an important water mass known as Subantarctic Mode Water (SAMW). SAMW originates at the surface in the Southern

  3. Interaction of light with the ZnO surface: Photon induced oxygen "breathing," oxygen vacancies, persistent photoconductivity,

    E-Print Network [OSTI]

    Shalish, Ilan

    , which energy position coincides with the position of the so called "green luminescence" in Zn on the energy required for decomposition and for the observed emission of lattice oxygen in the form of CO2 of the energy bands. Using surface photovoltage spectroscopy in ultra high vacuum, we monitored changes

  4. Simulation par la théorie de la fonctionnelle de la densité de l'interaction de l'ion uranyle avec les surfaces de $TiO_{2}$ et de $NiFe_{2}O_4$

    E-Print Network [OSTI]

    Perron, Hadrien

    2007-01-01

    Simulation par la théorie de la fonctionnelle de la densité de l'interaction de l'ion uranyle avec les surfaces de $TiO_{2}$ et de $NiFe_{2}O_4$

  5. JET Papers Presented to the11th International Conference on Plasma Surface Interactions in Controlled Fusion Devices (11th PSI) (Mito-shi, Japan, 23rd-27th May 1994)

    E-Print Network [OSTI]

    JET Papers Presented to the11th International Conference on Plasma Surface Interactions in Controlled Fusion Devices (11th PSI) (Mito-shi, Japan, 23rd-27th May 1994)

  6. CARBON SEQUESTRATION ON SURFACE MINE LANDS

    SciTech Connect (OSTI)

    Donald H. Graves; Christopher Barton; Richard Sweigard; Richard Warner

    2004-11-30

    A monitoring program to measure treatment effects on above ground, and below ground carbon and nitrogen pools for the planting areas is being conducted. The collection of soil and tissue samples from both the 2003 and 2004 plantings is complete and are currently being processed in the laboratory. Detailed studies have been initiated to address specific questions pertaining to carbon cycling. Examinations of decomposition and heterotropic respiration on carbon cycling in the reforestation plots were continued during this reporting period. A whole-tree harvesting method was employed to evaluate carbon accumulation as a function of time on the mined site. The trees were extracted from the sites and separated into the following components: foliage, stems, branches, and roots.

  7. CARBON SEQUESTRATION ON SURFACE MINE LANDS

    SciTech Connect (OSTI)

    Donald H. Graves; Christopher Barton; Richard Sweigard; Richard Warner

    2005-02-25

    The October-December Quarter was dedicated to analyzing the first two years tree planting activities and evaluation of the results. This included the analyses of the species success at each of the sites and quantifying the data for future year determination of research levels. Additional detailed studies have been planned to further quantify total carbon storage accumulation on the research areas. At least 124 acres of new plantings will be established in 2005 to bring the total to 500 acres or more in the study area across the state of Kentucky. During the first 2 years of activities, 172,000 tree seedlings were planted on 257 acres in eastern Kentucky and 77,520 seedlings were planted on 119 acres in western Kentucky. The quantities of each species was discussed in the first Annual Report. A monitoring program was implemented to measure treatment effects on above and below ground C and nitrogen (N) pools and fluxes. A sampling strategy was devised that will allow for statistical comparisons of the various species within planting conditions and sites. Seedling heights and diameters are measured for initial status and re-measured on an annual basis. Leaves were harvested and leaf area measurements were performed. They were then dried and weighed and analyzed for C and N. Whole trees were removed to determine biomass levels and to evaluate C and N levels in all components of the trees. Clip plots were taken to determine herbaceous production and litter was collected in baskets and gathered each month to quantify C & N levels. Soil samples were collected to determine the chemical and mineralogical characterization of each area. The physical attributes of the soils are also being determined to provide information on the relative level of compaction. Hydrology and water quality monitoring is being conducted on all areas. Weather data is also being recorded that measures precipitation values, temperature, relative humidity wind speed and direction and solar radiation. Detailed studies to address specific questions pertaining to carbon flux are continuing.

  8. The surface structure of ?-uranophane and its interaction with Eu(III) – An integrated computational and fluorescence spectroscopy study

    SciTech Connect (OSTI)

    Kuta, Jadwiga; Wang, Zheming; Wisuri, Katy; Wander, Matthew C F.; Wall, Nathalie; Clark, Aurora E.

    2013-02-15

    Uranophane is a rare U(VI) secondary silicate mineral formed in nature by the oxidation of the primary mineral uraninite. It is also relevant to the long-term geochemistry of nuclear waste repositories, where it can be formed under oxidizing conditions and has the potential to act as a secondary barrier to the migration of radionuclides through mineral sorption reactions. A combination of classical molecular dynamics and ab-initio density functional theory (DFT) has been employed to investigate the uranophane|water interface as well as the interfacial reactivity of the U(VI) silicate toward acidic conditions and radionuclide ion sorption. The sorption simulations have been complemented by experimental sorption studies and laser induced fluorescence spectroscopy to help identify the molecular structure of the surface sorbed species. Experimental distances and essential coordination numbers are properly captured by the simulation results within bulk uranophane, while interfacial water is found to orient primarily with the hydrogen-atoms directed towards the negatively charged surface. Sorption sites for water are observed to belong to 3 different groups: (1) those involving uranyl oxygen, (2) involving uranyl and silica hydroxyl oxygen atoms, and (3) involving hydroxyl hydrogen. The pKa of the surface -OH groups have been calculated using a variety of models, including a bond valence approach and utilization of the energetics of deprotonation within DFT. Under basic conditions, deprotonation of the Si-OH groups is likely responsible for uranophane dissolution. Finally, the stability and structure of surface sorbed Eu3+ has been examined, with a stable inner-sphere species being observed.

  9. Evidence of a rearrangement of the surface structure in titanium phthalocyanine sensors induced by the interaction with nitrogen oxides molecules

    SciTech Connect (OSTI)

    Generosi, A.; Paci, B.; Albertini, V. Rossi; Perfetti, P.; Paoletti, A.M.; Pennesi, G.; Rossi, G.; Caminiti, R.

    2005-10-31

    Thin-film samples of titanium phthalocyanine, a sensor of environmental pollutants, were studied by time resolved energy-dispersive x-ray reflectivity (EDXR). This original method demonstrated to be an ideal tool to follow the evolution of the films morphology upon gas exposure, in situ, also allowing an unexpected response of the sensors to be detected. Indeed, while the increase in thickness showed the characteristic feature of a 'breathing-like' expansion, already observed in other metal-Pc, the curve of roughness versus exposure time exhibited a peak. This effect, in some cases evident by observation with the naked eye the EDXR data, was attributed to a surface structure rearrangement process.

  10. Costs of Land Subsidence Due to Groundwater Withdrawal 

    E-Print Network [OSTI]

    Warren, J. P.; Jones, L. L.; Griffin, W. L.; Lacewell, R. D.

    1974-01-01

    In recent years the area around Houston and Baytown, Texas, has been affected to an increasing degree by land subsidence. Sinking of the land surface has reached critical proportions in many areas, and subsidence of as much as eight feet has...

  11. Potential influence of climate-induced vegetation shifts on future land use and associated land carbon fluxes in Northern Eurasia

    E-Print Network [OSTI]

    Kicklighter, David

    Climate change will alter ecosystem metabolism and may lead to a redistribution of vegetation and changes in fire regimes in Northern Eurasia over the 21st century. Land management decisions will interact with these ...

  12. Title: Canada Land Inventory: Land Capability for Agriculture Data Creator /

    E-Print Network [OSTI]

    , Ontario, Prince Edward Island, Quebec, Saskatchewan Keywords (Subject): Land Use, Soils, Agriculture

  13. Title: Canada Land Inventory: Land Capability for Forestry Data Creator /

    E-Print Network [OSTI]

    , Ontario, Prince Edward Island, Quebec, Saskatchewan #12;Keywords (Subject): Land Use, Soils, Vegetation

  14. Land–Ocean Warming Contrast over a Wide Range of Climates: Convective Quasi-Equilibrium Theory and Idealized Simulations

    E-Print Network [OSTI]

    Byrne, Michael Patrick

    Surface temperatures increase at a greater rate over land than ocean in simulations and observations of global warming. It has previously been proposed that this land–ocean warming contrast is related to different changes ...

  15. User`s Guide: Database of literature pertaining to the unsaturated zone and surface water-ground water interactions at the Idaho National Engineering Laboratory

    SciTech Connect (OSTI)

    Hall, L.F.

    1993-05-01

    Since its beginnings in 1949, hydrogeologic investigations at the Idaho National Engineering Laboratory (INEL) have resulted in an extensive collection of technical publications providing information concerning ground water hydraulics and contaminant transport within the unsaturated zone. Funding has been provided by the Department of Energy through the Department of Energy Idaho Field Office in a grant to compile an INEL-wide summary of unsaturated zone studies based on a literature search. University of Idaho researchers are conducting a review of technical documents produced at or pertaining to the INEL, which present or discuss processes in the unsaturated zone and surface water-ground water interactions. Results of this review are being compiled as an electronic database. Fields are available in this database for document title and associated identification number, author, source, abstract, and summary of information (including types of data and parameters). AskSam{reg_sign}, a text-based database system, was chosen. WordPerfect 5.1{copyright} is being used as a text-editor to input data records into askSam.

  16. Keywords. Protein interaction; putative integral membrane protein; ribosomal phosphoprotein P0; surface expression; yeast two-Abbreviations used: GST, glutathione-S transferase; IP, immunoprecipitation; ORF, open reading frame; PfP0, Plasmodium falci-

    E-Print Network [OSTI]

    Sharma, Shobhona

    , Homi Bhabha Road, Mumbai 400 005, India Corresponding author (Fax, 91-22-2280-4610; Email, sharma. One of the strongest interactors (clone 67B) mapped to the gene YFL034W which codes for a hypothetical interacted with clone 67B, was mapped to 60­148 amino acids. It is envisaged that the surface localization

  17. Step free energies, surface stress, and adsorbate interactions for Cl-Si,,100... at 700 K G. J. Xu, S. V. Khare, Koji S. Nakayama, C. M. Aldao,* and J. H. Weaver

    E-Print Network [OSTI]

    Khare, Sanjay V.

    Step free energies, surface stress, and adsorbate interactions for Cl-Si,,100... at 700 K G. J. Xu free energies for A- and B-type steps was Fb /Fa 2.44 for regrowth islands and 3.33 for pits)-(2 1) and the energies of its two in- equivalent steps have been studied extensively.1 Step free

  18. Future land use plan

    SciTech Connect (OSTI)

    NONE

    1995-08-31

    The US Department of Energy`s (DOE) changing mission, coupled with the need to apply appropriate cleanup standards for current and future environmental restoration, prompted the need for a process to determine preferred Future Land Uses for DOE-owned sites. DOE began the ``Future Land Use`` initiative in 1994 to ensure that its cleanup efforts reflect the surrounding communities` interests in future land use. This plan presents the results of a study of stakeholder-preferred future land uses for the Brookhaven National Laboratory (BNL), located in central Long Island, New York. The plan gives the Laboratory`s view of its future development over the next 20 years, as well as land uses preferred by the community were BNL ever to cease operations as a national laboratory (the post-BNL scenario). The plan provides an overview of the physical features of the site including its history, topography, geology/hydrogeology, biological inventory, floodplains, wetlands, climate, and atmosphere. Utility systems and current environmental operations are described including waste management, waste water treatment, hazardous waste management, refuse disposal and ground water management. To complement the physical descriptions of the site, demographics are discussed, including overviews of the surrounding areas, laboratory population, and economic and non-economic impacts.

  19. Land-use Leakage

    SciTech Connect (OSTI)

    Calvin, Katherine V.; Edmonds, James A.; Clarke, Leon E.; Bond-Lamberty, Benjamin; Kim, Son H.; Wise, Marshall A.; Thomson, Allison M.; Kyle, G. Page

    2009-12-01

    Leakage occurs whenever actions to mitigate greenhouse gas emissions in one part of the world unleash countervailing forces elsewhere in the world so that reductions in global emissions are less than emissions mitigation in the mitigating region. While many researchers have examined the concept of industrial leakage, land-use policies can also result in leakage. We show that land-use leakage is potentially as large as or larger than industrial leakage. We identify two potential land-use leakage drivers, land-use policies and bioenergy. We distinguish between these two pathways and run numerical experiments for each. We also show that the land-use policy environment exerts a powerful influence on leakage and that under some policy designs leakage can be negative. International “offsets” are a potential mechanism to communicate emissions mitigation beyond the borders of emissions mitigating regions, but in a stabilization regime designed to limit radiative forcing to 3.7 2/m2, this also implies greater emissions mitigation commitments on the part of mitigating regions.

  20. Energy and land use

    SciTech Connect (OSTI)

    Not Available

    1981-12-01

    This report addresses the land use impacts of past and future energy development and summarizes the major federal and state legislation which influences the potential land use impacts of energy facilities and can thus influence the locations and timing of energy development. In addition, this report describes and presents the data which are used to measure, and in some cases, predict the potential conflicts between energy development and alternative uses of the nation's land resources. The topics section of this report is divided into three parts. The first part describes the myriad of federal, state and local legislation which have a direct or indirect impact upon the use of land for energy development. The second part addresses the potential land use impacts associated with the extraction, conversion and combustion of energy resources, as well as the disposal of wastes generated by these processes. The third part discusses the conflicts that might arise between agriculture and energy development as projected under a number of DOE mid-term (1990) energy supply and demand scenarios.

  1. Economic Effects of Land Subsidence Due to Excessive Groundwater Withdrawal in the Texas Gulf Coast Area 

    E-Print Network [OSTI]

    Jones, L. L.; Larson, J.

    1975-01-01

    Land surface subsidence continues to be a destructive force in the Texas Gulf Coast area. The sinking of the surface has been linked by engineers to the withdrawal of groundwater. Subsidence causes damages and property value losses as saltwater...

  2. Energy balance and partition in Inner Mongolia steppe ecosystems with different land use types

    E-Print Network [OSTI]

    Chen, Jiquan

    Energy balance and partition in Inner Mongolia steppe ecosystems with different land use types surface, including radiation balance, energy partitioning, aerodynamic characteristics, leaf area index records of the surface energy balance are currently available for grassland ecosystems, especially

  3. LAND MINE DETECTION IN BARE SOILS USING THERMAL INFRARED SENSORS

    E-Print Network [OSTI]

    Borchers, Brian

    LAND MINE DETECTION IN BARE SOILS USING THERMAL INFRARED SENSORS Sung-ho Hong, Timothy W. Miller, The Netherlands. lensen@fel.tno.nl ABSTRACT Soil surface temperatures not only exhibit daily and annual cycles of soil surface temperatures, it will be difficult to determine what times of day are most suitable

  4. Finding GIS data: Land cover and land use in Kansas

    E-Print Network [OSTI]

    Houser, Rhonda

    2006-12-08

    classes with no key to indicate class descriptions. The student understands how human actions modify the physical environment. The student helps create both a hard copy and digital pie chart that shows relative land cover class areas. The student... helps create a digital pie chart that shows relative land cover class areas. The student helps create a pie chart by hand that shows relative land cover class areas. The student creates e a pie chart by hand that shows relative land cover class...

  5. A framework for benchmarking land models

    SciTech Connect (OSTI)

    Luo, Yiqi; Randerson, J.; Abramowitz, G.; Bacour, C.; Blyth, E.; Carvalhais, N.; Ciais, Philippe; Dalmonech, D.; Fisher, J.B.; Fisher, R.; Friedlingstein, P.; Hibbard, Kathleen A.; Hoffman, F. M.; Huntzinger, Deborah; Jones, C.; Koven, C.; Lawrence, David M.; Li, D.J.; Mahecha, M.; Niu, S.L.; Norby, Richard J.; Piao, S.L.; Qi, X.; Peylin, P.; Prentice, I.C.; Riley, William; Reichstein, M.; Schwalm, C.; Wang, Y.; Xia, J. Y.; Zaehle, S.; Zhou, X. H.

    2012-10-09

    Land models, which have been developed by the modeling community in the past few decades to predict future states of ecosystems and climate, have to be critically evaluated for their performance skills of simulating ecosystem responses and feedback to climate change. Benchmarking is an emerging procedure to measure performance of models against a set of defined standards. This paper proposes a benchmarking framework for evaluation of land model performances and, meanwhile, highlights major challenges at this infant stage of benchmark analysis. The framework includes (1) targeted aspects of model performance to be evaluated, (2) a set of benchmarks as defined references to test model performance, (3) metrics to measure and compare performance skills among models so as to identify model strengths and deficiencies, and (4) model improvement. Land models are required to simulate exchange of water, energy, carbon and sometimes other trace gases between the atmosphere and land surface, and should be evaluated for their simulations of biophysical processes, biogeochemical cycles, and vegetation dynamics in response to climate change across broad temporal and spatial scales. Thus, one major challenge is to select and define a limited number of benchmarks to effectively evaluate land model performance. The second challenge is to develop metrics of measuring mismatches between models and benchmarks. The metrics may include (1) a priori thresholds of acceptable model performance and (2) a scoring system to combine data–model mismatches for various processes at different temporal and spatial scales. The benchmark analyses should identify clues of weak model performance to guide future development, thus enabling improved predictions of future states of ecosystems and climate. The near-future research effort should be on development of a set of widely acceptable benchmarks that can be used to objectively, effectively, and reliably evaluate fundamental properties of land models to improve their prediction performance skills.

  6. Stumped by Detroit's Vacant Land Process?

    E-Print Network [OSTI]

    Fischer, Lucia; Kiani, Naria; O'Brien-Kovari, Lilly; Ordower, Aaron

    2014-01-01

    Stumped by Detroit's Vacant Land Process?Illustrating the Role of the Detroit Land Bank AuthorityLos Angeles STUMPED BY DETROIT’S VACANT LAND PROCESS?

  7. Sandia Energy - Bureau of Land Management

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Bureau of Land Management Home Climate & Earth Systems Sustainable Subsurface Energy Development Program Leadership Bureau of Land Management Bureau of Land ManagementMaelyn...

  8. The Impacts of Land Cover Change on Climate over China 

    E-Print Network [OSTI]

    Chen, Liang

    2015-06-22

    experienced significant land cover changes, such as urbanization (Hua et al. 2008; Zhou et al. 2004), agricultural expansion (Zhang 2000), and desertification (Wang et al. 2006a; Xue 1996). Even though there have been several studies focusing on land... processes (Kalnay and Cai 2003). By using the OMR method, Zhang et al. (2005) suggest that urbanization in southern China, deforestation, and desertification in northern China may increase surface temperature, while vegetation cover increases may decrease...

  9. Chennai Urban Land Market Assessment

    E-Print Network [OSTI]

    Dowall, David E; Monkkonen, Paavo

    2007-01-01

    for 2003 and 2004 land price data (Tables 13 and 14), adding25 Table 12: Price Gradient Regression Results for35 Table 15: Average Price of Land in Residential Plots and

  10. Issues in using landscape indicators to assess land changes

    SciTech Connect (OSTI)

    Kline, Keith L [ORNL; Dale, Virginia H [ORNL

    2012-01-01

    Landscape indicators, when combined with information about environmental conditions (such as habitat potential, biodiversity, carbon and nutrient cycling, and erosion) and socioeconomic forces, can provide insights about changing ecosystem services. They also provide information about opportunities for improving natural resources management. Landscape indicators rely on data regarding land cover, land management and land functionality. Challenges in using landscape indicators to assess change and effects include (1) measures of land management and attributes that are reliable, robust and consistent for all areas on the Earth do not exist, and thus land cover is more frequently utilized; (2) multiple types of land cover and management are often found within a single landscape and are constantly changing, which complicates measurement and interpretation; and (3) while causal analysis is essential for understanding and interpreting changes in indicator values, the interactions among multiple causes and effects over time make accurate attribution among many drivers of change particularly difficult. Because of the complexity, sheer number of variables, and limitations of empirical data on land changes, models are often used to illustrate and estimate values for landscape indicators, and those models have several problems. Recommendations to improve our ability to assess the effects of changes in land management include refinement of questions to be more consistent with available information and the development of data sets based on systematic measurement over time of spatially explicit land qualities such as carbon and nutrient stocks, water and soil quality, net primary productivity, habitat and biodiversity. Well-defined and consistent land-classification systems that are capable of tracking changes in these and other qualities that matter to society need to be developed and deployed. Because landscapes are so dynamic, it is crucial to develop ways for the scientific community to work together to collect data and develop tools that will enable better analysis of causes and effects and to develop robust management recommendations that will increases land s capacity to meet societal needs in a changing world.

  11. Aggressive landing maneuvers for unmanned aerial vehicles

    E-Print Network [OSTI]

    Bayraktar, Selcuk

    2006-01-01

    VTOL (Vertical Take Off and Landing) vehicle landing is considered to be a critically difficult task for both land, marine, and urban operations. This thesis describes one possible control approach to enable landing of ...

  12. Spatial Scaling of Land Cover Networks

    E-Print Network [OSTI]

    Small, Christopher

    2015-01-01

    Spatial networks of land cover are well-described by power law rank-size distributions. Continuous field proxies for human settlements, agriculture and forest cover have similar spatial scaling properties spanning 4 to 5 orders of magnitude. Progressive segmentation of these continuous fields yields spatial networks with rank-size distributions having slopes near -1 for a wide range of thresholds. We consider a general explanation for this scaling that does not require different processes for each type of land cover. The same conditions that give rise to scale-free networks in general can produce power law distributions of component sizes for bounded spatial networks confined to a plane or surface. Progressive segmentation of a continuous field naturally results in growth of the network while the increasing perimeters of the growing components result in preferential attachment to the larger components with the longer perimeters. Progressive segmentation of two types of random continuous field results in progr...

  13. Integrating diverse methods to understand climateland interactions in East Africa

    E-Print Network [OSTI]

    Integrating diverse methods to understand climate­land interactions in East Africa Jennifer M-disciplinary scientists examining climate­land dynamics at multiple scales in East Africa. East Africa is a region Ltd. All rights reserved. Keywords: Climate change; Land use; Africa; Modeling; Biocomplexity; Human

  14. Final report for the project "Improving the understanding of surface-atmosphere radiative interactions by mapping surface reflectance over the ARM CART site" (award DE-FG02-02ER63351)

    SciTech Connect (OSTI)

    Alexander P. Trishchenko; Yi Luo; Konstantin V. Khlopenkov, William M. Park; Zhanqing Li; Maureen Cribb

    2008-11-28

    Surface spectral reflectance (albedo) is a fundamental variable affecting the transfer of solar radiation and the Earth’s climate. It determines the proportion of solar energy absorbed by the surface and reflected back to the atmosphere. The International Panel on Climate Change (IPCC) identified surface albedo among key factors influencing climate radiative forcing. Accurate knowledge of surface reflective properties is important for advancing weather forecasting and climate change impact studies. It is also important for determining radiative impact and acceptable levels of greenhouse gases in the atmosphere, which makes this work strongly linked to major scientific objectives of the Climate Change Research Division (CCRD) and Atmospheric Radiation Measurement (ARM) Program. Most significant accomplishments of eth project are listed below. I) Surface albedo/BRDF datasets from 1995 to the end of 2004 have been produced. They were made available to the ARM community and other interested users through the CCRS public ftp site ftp://ftp.ccrs.nrcan.gc.ca/ad/CCRS_ARM/ and ARM IOP data archive under “PI data Trishchenko”. II) Surface albedo properties over the ARM SGP area have been described for 10-year period. Comparison with ECMWF data product showed some deficiencies in the ECMWF surface scheme, such as missing some seasonal variability and no dependence on sky-conditions which biases surface energy budget and has some influence of the diurnal cycle of upward radiation and atmospheric absorption. III) Four surface albedo Intensive Observation Period (IOP) Field Campaigns have been conducted for every season (August, 2002, May 2003, February 2004 and October 2004). Data have been prepared, documented and transferred to ARM IOP archive. Nine peer-reviewed journal papers and 26 conference papers have been published.

  15. Rich land Operations Office

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100Nationalquestionnaires 0serialIndustrial ConsumptionRibbon The|Rich land

  16. Land Management - Hanford Site

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse Bergkamp Graduate studentScienceLaboratory program Labs and Field SiteLand

  17. Myoelectric control is filled with potential to significantly change human-robot interaction. Humans desire compliant robots to safely interact in dynamic environments associated with daily activities. As surface

    E-Print Network [OSTI]

    for Engineering of Matter, Transport and Energy #12; activities. As surface electromyography non-invasively measures limb motion intent and correlates with joint, allowing users to learn efficient control through the refinement of unique muscle synergies while

  18. From land use to land cover: Restoring the afforestation signal...

    Office of Scientific and Technical Information (OSTI)

    integrated assessment - earth system model and the implications for CMIP5 RCP simulations Climate projections depend on scenarios of fossil fuel emissions and land use change, and...

  19. Investigation of Soil Moisture - Vegetation Interactions in Oklahoma 

    E-Print Network [OSTI]

    Ford, Trenton W.

    2013-03-06

    and-atmosphere interactions are an important component of climate, especially in semi-arid regions such as the Southern Great Plains. Interactions between soil moisture and vegetation modulate land-atmosphere coupling and thus represent a crucial...

  20. REVIEW PAPER Watershed land use as a determinant of metal

    E-Print Network [OSTI]

    Mazumder, Asit

    REVIEW PAPER Watershed land use as a determinant of metal concentrations in freshwater systems- lating concentrations and behavior of metals in freshwater systems. Results from the review suggest metal­DOM­pH interactions) affect the metal concentrations in freshwater systems. Among the watershed

  1. s-d Electronic interactions induced H2 dissociation on the \\gamma-U(100) surface and influences of niobium doping

    E-Print Network [OSTI]

    Yang, Yu; Shi, Peng; Wang, Xiaolin

    2011-01-01

    The dissociation of hydrogen molecules on the \\gamma-U(100) surface is systematically studied with the density functional theory method. Through potential energy surface calculations, we find that hydrogen molecules can dissociate without any barriers on the clean \\gamma-U(100) surface. After careful electronic analysis, it is found that charge transfer between the hydrogen s and uranium d electronic states causes the dissociation, which is quite different from the dissociation of hydrogen molecules on other actinide metal surfaces. Considering that doping of 3d transition metal atoms can stabilize the \\alpha phase of U, we also study the influences of Nb-doping on the hydrogen dissociation process. We find that the 3d electronic states of Nb also take part in the hybridization with hydrogen s electronic states, which leads to the result that hydrogen molecules also dissociate without any energy barriers on the doped U surface. In addition, the free electronic energy lowers down more quickly for a hydrogen mo...

  2. Snow process modeling in the North American Land Data Assimilation System (NLDAS)

    E-Print Network [OSTI]

    Robock, Alan

    Snow process modeling in the North American Land Data Assimilation System (NLDAS): 1. Evaluation of model-simulated snow cover extent Justin Sheffield,1 Ming Pan,1 Eric F. Wood,1 Kenneth E. Mitchell,2) and consists of two parts: (1) assessment of land surface model simulations of snow cover extent and (2

  3. Simulating crop phenology in the Community Land Model and its impact on energy and carbon fluxes

    E-Print Network [OSTI]

    Minnesota, University of

    , regional, and global scales. However, the evaluation of crop models that can be coupled to Earth system al., 2012; Levis et al., 2012]. Since CLM is part of the Earth system model framework management are required. The Community Land Model (CLM) is the land surface scheme of the Community Earth

  4. Energy Budget-Based Simulation of Evapotranspiration from Land in the Great Lakes Basin

    E-Print Network [OSTI]

    Energy Budget-Based Simulation of Evapotranspiration from Land in the Great Lakes Basin Primary-available data for change in net radiative energy for land surfaces in the same region in the same general energy available in this region according to the corresponding GCM. Thus there is a mismatch: While air

  5. The influence of surface interactions on the reversibility of ferri/ferrocyanide at boron-doped diamond thin-film electrodes

    SciTech Connect (OSTI)

    Granger, M.C.; Swain, G.M.

    1999-12-01

    The electrochemistry of four redox analytes [Fe(CN){sub 6}{sup {minus}3/{minus}4}, Ru(NH{sub 3}){sub 6}{sup +2/+3}, IrCl{sub 6}{sup {minus}2/{minus}3}, and methyl viologen, MV{sup +2/+/0}] was investigated at polycrystalline, boron-doped diamond thin-film electrodes before and after anodic polarization and hydrogen plasma treatment. The as-deposited diamond surface is predominantly hydrogen treatment, and quasi-reversible cyclic voltammograms ({Delta}E{sub p} of 60--80 mV) were observed for all of these couples at 0.1 V/s. After anodic polarization in H{sub 2}SO{sub 4}, the surface atomic O/C ratio, as determined by X-ray photoelectron spectroscopy, increased from 0.02 to ca. 0.20. Concomitant with the increase in surface oxygen, the {Delta}E{sub p} for Fe(CN){sub 6}{sup {minus}3/{minus}4} increased to over 200 mV, while the {Delta}E{sub p} values for the other redox systems remained relatively unchanged. After acid washing and rehydrogenating the surface in hydrogen plasma (i.e., atomic hydrogen), the {Delta}E{sub p} for Fe(CN){sub 6}{sup {minus}3/{minus}4} returned to ca. 80 mV, while the {Delta}E{sub p} values for the other three redox analytes remained close to the original values. The results demonstrate the electron transfer for ferri/ferrocyanide is very sensitive to the presence of surface carbon-oxygen functionalities and that the electron transfer involves a site associated with the hydrogen-terminated surface. The results also unequivocally rule out the influence of adventitious nondiamond phases as the sole sites for the electron transfer.

  6. 22 WHOI 1999 Annual Report Landing Marine Laboratory) pur-

    E-Print Network [OSTI]

    Buesseler, Ken

    fertilization as a proxy for car- bon export from the surface to the deep sea. Thorium is a naturally oc and a chemical drawdown of carbon di- oxide in the water column. But what was the fate of this car- bon? We know- lations. In the 1980s, the late John Martin (Moss Landing Marine Labo- ratory) advanced the idea that car

  7. DECEMBER 2005|1738 Coupling between Land Ecosystems and

    E-Print Network [OSTI]

    Litvak, Marcy

    Biogenic Aerosol Pathways BY MARY BARTH, JOSEPH P. MCFADDEN, JIELUN SUN, CHRISTINE WIEDINMYER, PATRICK to Earth, in turn, affects many of the key properties of the land surface. Terrestrial ecosystems also incorporated into quantitative numerical models describing the interac- tions between the terrestrial

  8. Surface Salt Bridges, Double-Mutant Cycles, and Protein Stability: an Experimental and Computational Analysis of the Interaction of the Asp 23 Side Chain with the

    E-Print Network [OSTI]

    Snow, Christopher

    Surface Salt Bridges, Double-Mutant Cycles, and Protein Stability: an Experimental-mutant cycles have been used to investigate a salt bridge in the N-terminal domain of the protein L9. Aspartic solvent-exposed salt bridge with the protonated N-terminus of the protein. Mutations were studied in which

  9. Analysis of the aerosol-cloud interactions from aircraft, surface measurements, and cloud parcel model during the March 2000 IOP at the ARM SGP site

    E-Print Network [OSTI]

    Delene, David J.

    model during the March 2000 IOP at the ARM SGP site Delene, D. J. (a), Dong, X. (a), Chen, Y. (b (ARM) Southern Great Plains (SGP) site. Data Aerosol MeasurementsAerosol Measurements years of continuous surface aerosol measurements from the Department of Energy's ARM SGP Cloud

  10. ELEMENTARY PARTICLE INTERACTIONS

    SciTech Connect (OSTI)

    EFREMENKO, YURI; HANDLER, THOMAS; KAMYSHKOV, YURI; SIOPSIS, GEORGE; SPANIER, STEFAN

    2013-07-30

    The High-Energy Elementary Particle Interactions group at UT during the last three years worked on the following directions and projects: Collider-based Particle Physics; Neutrino Physics, particularly participation in “NO?A”, “Double Chooz”, and “KamLAND” neutrino experiments; and Theory, including Scattering amplitudes, Quark-gluon plasma; Holographic cosmology; Holographic superconductors; Charge density waves; Striped superconductors; and Holographic FFLO states.

  11. Integrating Multiple Geographic Information Systems to Create a Versatile Land Evaluation Site Assessment Model

    E-Print Network [OSTI]

    Morrison, Grady

    2008-11-19

    GIS in Urban Planning Integrating Multiple Geographic Information Systems to Create a Versatile Land Suitability Analysis Model Grady Morrison Undergraduate Department of Geography University of Kansas gmorrisn@ku.edu Impervious Surface...

  12. 3, 18091850, 2006 groundwater-surface

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    HESSD 3, 1809­1850, 2006 Measuring groundwater-surface water interactions: a review E. Kalbus et al System Sciences Measuring methods for groundwater, surface water and their interactions: a review E;HESSD 3, 1809­1850, 2006 Measuring groundwater-surface water interactions: a review E. Kalbus et al

  13. Contribution of ocean, fossil fuel, land biosphere, and biomass burning carbon fluxes to seasonal and interannual variability in atmospheric CO 2

    E-Print Network [OSTI]

    2008-01-01

    dioxide emissions from fossil fuel consumption and cementannual variations in fossil fuel emissions, J. Geophys.including land, ocean and fossil fuel surface fluxes, have

  14. National Land Cover Data National Land Cover Data

    E-Print Network [OSTI]

    _Data_Presentation_Form: raster digital data Other_Citation_Details: Classification and processing of the orginal remote sensing (NLCD). The NLCD is a 21-class land cover classification of the entire United States. It is derived from

  15. LOGISMOS Cost Functions Surface set feasibility

    E-Print Network [OSTI]

    Boykov, Yuri

    9/14/2014 1 LOGISMOS ­ Cost Functions 9/14/2014 1 Surface set feasibility A surface set { f1(x constraints Each pair of surfaces satisfies surface interaction constraints. #12;9/14/2014 2 Cost Function ­ Surface Costs One-to-one correspondence between each feasible surface set and each closed set

  16. Land and Facility Use Planning

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1996-07-09

    The Land and Facility Use Planning process provides a way to guide future site development and reuse based on the shared long-term goals and objectives of the Department, site and its stakeholders. Does not cancel other directives.

  17. Soil moisture in complex terrain: quantifying effects on atmospheric boundary layer flow and providing improved surface boundary conditions for mesoscale models

    E-Print Network [OSTI]

    Daniels, Megan Hanako

    2010-01-01

    groundwater, land-surface, and mesoscale atmospheric model-and modification of mesoscale circulations. , Mon. Wea.J. Davis, The effects of mesoscale surface heterogeneity on

  18. NASA Cold Land Processes Field Experiment

    E-Print Network [OSTI]

    NASA Cold Land Processes Field Experiment Overview and Preliminary Results NASA Cold Land Processes Field Experiment Overview and Preliminary Results NASA Cold Land ProcessesNASA Cold Land Processes Field properties using active and passive microwave remote sensing. NASA DC-8 Airborne Laboratory with AIRSAR

  19. Earth's surface fluid variations and deformations from GPS and GRACE in global warming

    E-Print Network [OSTI]

    Jin, Shuanggen; Feng, Guiping

    2011-01-01

    Global warming is affecting our Earth's environment. For example, sea level is rising with thermal expansion of water and fresh water input from the melting of continental ice sheets due to human-induced global warming. However, observing and modeling Earth's surface change has larger uncertainties in the changing rate and the scale and distribution of impacts due to the lack of direct measurements. Nowadays, the Earth observation from space provides a unique opportunity to monitor surface mass transfer and deformations related to climate change, particularly the global positioning system (GPS) and the Gravity Recovery and Climate Experiment (GRACE) with capability of estimating global land and ocean water mass. In this paper, the Earth's surface fluid variations and deformations are derived and analyzed from global GPS and GRACE measurements. The fluids loading deformation and its interaction with Earth system, e.g., Earth Rotation, are further presented and discussed.

  20. Analysis of the densification of reclaimed surface mined land 

    E-Print Network [OSTI]

    Schneider, William Joseph

    1977-01-01

    exposed channel showing seepage into the pit. Striations are due to the dragline and are not large crossbeds. The scale bar is 20 ft. 27 18 Plasticity index, I ? liquid limit, w , relation- ship for the analyzed soils. The relationship of these two... (arrow) of the northern channel and the lignite. For scale, the picture is about 8 ft wide. FIGURE 17. Minor exposed channel showing seepage into the pit. Striations are due to the dragline and are not large crossbeds. The scale bar is 20 ft. 28...

  1. Effect of water table dynamics on land surface hydrologic memory

    E-Print Network [OSTI]

    Lo, Min-Hui; Famiglietti, James S

    2010-01-01

    Theory and observations, Water Resour. Res. , 34, 765–776.and macroscale models of water and energy balance, Ph.D.of capillary flux on the soil water balance in a stochastic

  2. Quantification of structural uncertainty in a land surface model

    E-Print Network [OSTI]

    Ray, Jaideep

    errors 0 500 1000 1500 2000 2500 -20 -10 0 10 20 30 40 50 60 70 80 time (days) runoffsimulationerrors 1600 1800 2000 4 8 16 32 64 128 256 512 1024 2048 0 100 200 Power c) Global Wavelet Spectrum 200 400-frequency decomposition of prior ensemble simulation errors 0 500 1000 1500 2000 2500 3000 3500 4000 4500 0 50 100 150 200

  3. Role of land surface processes in South American monsoon development

    E-Print Network [OSTI]

    Xue, Y; de Sales, F; Li, W P; Mechoso, C R; Nobre, C A; Juang, H M

    2006-01-01

    1996: The impact of desertification in the Mongolian and thehas dis- cussed desertification impacts in the framework of

  4. TNRC 51 - Land, Timber and Surface Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EISTJ Automation Jump to: navigation, search Name TJTMA Global33 -51 -

  5. Assessing surface water consumption using remotely-sensed groundwater, evapotranspiration, and precipitation

    E-Print Network [OSTI]

    Anderson, Ray G; Lo, Min-Hui; Famiglietti, James S

    2012-01-01

    model of land surface water and energy fluxes for generalin our water balance. One is a daily, 0.05 ET energy balance

  6. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Evaluation of 'all weather' microwave-derived land

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Evaluation of 'all weather measurements over land are still limited, especially under cloudy con- ditions. Ts estimates from infrared water vapor, cloud liquid wa- ter, and surface emissivities over land from Special Sensor Microwave / Im

  7. The Effect of War and Its Aftermath on Land Use and Land Cover in Jinotega, Nicaragua

    E-Print Network [OSTI]

    Zeledon, Esther Beatriz

    2010-01-01

    Lughod, D. 2000. Failed Buyout: Land Rights for the ContraLughod, D. 2000. Failed Buyout: Land Rights for the Contra

  8. Civil Engineering & Land Surveying Services

    E-Print Network [OSTI]

    Oviedo, Néstor J.

    Civil Engineering & Land Surveying Services May 6, 2014 COMPANY NAME DATE CONTACT PERSON MAILING ADDRESS PHONE / CELL # 1 Bedrock Engineering 5/6/14 David O. Hartley PO Box 25783 Fresno, CA 93729 559 North Star Engineering Group, Inc. 5/6/14 John Mensonides 620 12th St. Modesto, CA 95354 209-524-3525 4

  9. 2011LandesBioscience. Donotdistribute.

    E-Print Network [OSTI]

    Hay, Bruce A.

    fever, malaria, medea, merea, mosquitoes, pink bollworms, population replacement, population sup such as malaria and dengue fever. Advances in insect transgenesis are mak- ing it increasingly feasible Bugs 2:5, 1-6; September/October 2011; © 2011 Landes Bioscience COMMENTARY COMMENTARY Key words: dengue

  10. 2011LandesBioscience. Donotdistribute.

    E-Print Network [OSTI]

    Lasalde Dominicc, Jose A. - Department of Biology, Universidad de Puerto Rico

    -12; July/August 2011; © 2011 Landes Bioscience ReseARCh pApeR ReseARCh pApeR Introduction- and open-channel states can be explained by the structural effects caused by the presence of a bending scanning mutagenesis identifies a bending point on the lipid-exposed M3 transmembrane domain of the Torpedo

  11. Tropical Africa: Land use, biomass, and carbon estimates for 1980

    SciTech Connect (OSTI)

    Brown, S.; Gaston, G.; Daniels, R.C.

    1996-06-01

    This document describes the contents of a digital database containing maximum potential aboveground biomass, land use, and estimated biomass and carbon data for 1980 and describes a methodology that may be used to extend this data set to 1990 and beyond based on population and land cover data. The biomass data and carbon estimates are for woody vegetation in Tropical Africa. These data were collected to reduce the uncertainty associated with the possible magnitude of historical releases of carbon from land use change. Tropical Africa is defined here as encompassing 22.7 x 10{sup 6} km{sup 2} of the earth`s land surface and includes those countries that for the most part are located in Tropical Africa. Countries bordering the Mediterranean Sea and in southern Africa (i.e., Egypt, Libya, Tunisia, Algeria, Morocco, South Africa, Lesotho, Swaziland, and Western Sahara) have maximum potential biomass and land cover information but do not have biomass or carbon estimate. The database was developed using the GRID module in the ARC/INFO{sup TM} geographic information system. Source data were obtained from the Food and Agriculture Organization (FAO), the U.S. National Geophysical Data Center, and a limited number of biomass-carbon density case studies. These data were used to derive the maximum potential and actual (ca. 1980) aboveground biomass-carbon values at regional and country levels. The land-use data provided were derived from a vegetation map originally produced for the FAO by the International Institute of Vegetation Mapping, Toulouse, France.

  12. Chemical Reactions at Surfaces

    SciTech Connect (OSTI)

    Michael Henderson and Nancy Ryan Gray

    2010-04-14

    Chemical reactions at surfaces underlie some of the most important processes of today, including catalysis, energy conversion, microelectronics, human health and the environment. Understanding surface chemical reactions at a fundamental level is at the core of the field of surface science. The Gordon Research Conference on Chemical Reactions at Surfaces is one of the premiere meetings in the field. The program this year will cover a broad range of topics, including heterogeneous catalysis and surface chemistry, surfaces in environmental chemistry and energy conversion, reactions at the liquid-solid and liquid-gas interface, electronic materials growth and surface modification, biological interfaces, and electrons and photons at surfaces. An exciting program is planned, with contributions from outstanding speakers and discussion leaders from the international scientific community. The conference provides a dynamic environment with ample time for discussion and interaction. Attendees are encouraged to present posters; the poster sessions are historically well attended and stimulate additional discussions. The conference provides an excellent opportunity for junior researchers (e.g. graduate students or postdocs) to present their work and interact with established leaders in the field.

  13. Hawaii Department of Land and Natural Resources Office of Conservation...

    Open Energy Info (EERE)

    Resources Office of Conservation and Coastal Lands Jump to: navigation, search Name: Hawaii Department of Land and Natural Resources Office of Conservation and Coastal Lands From...

  14. Webtrends Archives by Fiscal Year - Topic Landing Pages | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Landing Pages Webtrends Archives by Fiscal Year - Topic Landing Pages From the EERE Web Statistics Archive: Corporate sites, Webtrends archives for the topic landing pages by...

  15. Pollution on the Federal Lands II: Water Pollution Law

    E-Print Network [OSTI]

    Glicksman, Robert L.

    1993-01-01

    text. FEDERAL LANDS WATER POLLUTION nonpoint sources. 19at 622. FEDERAL LANDS WATER POLLUTION The third requirement,n.25. FEDERAL LANDS WATER POLLUTION form a nondiscretionary

  16. Oregon Department of Land Conservation and Department - Forest...

    Open Energy Info (EERE)

    Land Protectio Program Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Oregon Department of Land Conservation and Department - Forest Land Protectio...

  17. Addressing land-based discrimination in

    E-Print Network [OSTI]

    Richner, Heinz

    , feudalism was based on ownership of land, the dominant mode of production. Political power was dominated by absolute kings and feudal overlords. Wealth and position in society was derived from the land ownership

  18. Land and Atmospheric Science GRAD STUDENT HANDBOOK

    E-Print Network [OSTI]

    Minnesota, University of

    Land and Atmospheric Science GRAD STUDENT HANDBOOK 20142015 WELCOME Welcome to the Graduate Program in Land and Atmospheric Science at the University of Minnesota. It is a sciencebased interdisciplinary program focused on the fundamentals of Earth system processes related

  19. Presented by LandScan Population Research

    E-Print Network [OSTI]

    by UT-Battelle for the U.S. Department of Energy Bhaduri_LandScan_SC10 Kosovo Refugee Crisis 1998 May 25 of Energy Bhaduri_LandScan_SC10 What is LandScan? Population distribution model, database, and tool people are located #12;3 Managed by UT-Battelle for the U.S. Department of Energy Bhaduri_LandScan_SC10

  20. Marine One Landing Exercise at Argonne

    SciTech Connect (OSTI)

    2013-03-20

    Marine One and its support helicopters conduct a landing exercise at Argonne prior to the President's visit.

  1. Oregon Department of Land Conservation and Department - Forest Land

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History ViewMayo, Maryland:NPIProtectio Program | Open Energy Information Oregon Department of Land

  2. SPECIES COMPOSITION OF INDUSTRIAL TRAWL LANDINGS

    E-Print Network [OSTI]

    SPECIES COMPOSITION OF INDUSTRIAL TRAWL LANDINGS IN NEW ENGLAND, 1957 Marine Biological Laboratory;#12;ABSTRACT This report presents data on the species composition of the industrial trawl fish catch landed OF TABLES Page Table 1. 1957 landings and number of trips of industrial trawl fish vessels at Pt. Judith

  3. Land-Use Change and Bioenergy

    SciTech Connect (OSTI)

    None

    2011-07-01

    This publication describes the Biomass Program’s efforts to examine the intersection of land-use change and bioenergy production. It describes legislation requiring land-use change assessments, key data and modeling challenges, and the research needs to better assess and understand the impact of bioenergy policy on land-use decisions.

  4. Land Information Systems in Developing Countries

    E-Print Network [OSTI]

    California at Santa Barbara, University of

    Land Information Systems in Developing Countries: Bibliography Compiled by: Harlan Onsrud Jeff Acknowledgments Articles on land information systems and cadastral systems in developing countries are spread SES 88-10917. #12;1 References Abdul, Majid Bin Mohamed (1984). Proposed Land Information System

  5. FIT-FOR-PURPOSE LAND ADMINISTRATION

    E-Print Network [OSTI]

    FIT-FOR-PURPOSE LAND ADMINISTRATION AND THE POST-2015 DEVELOPMENT AGENDA ANNUAL WORLD BANK the coalescence the yardstick 3 #12;Methodology fit-for-purpose land administration urban and rural; it will influence land administration design 2. Fit-for-purpose is happening; but, needs purpose, stages, and future

  6. Surface Soil

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Surface Soil Surface Soil We compare local soil samples with samples collected from northern New Mexico locations that are beyond the range of potential influence from normal...

  7. Monitoring urban land cover change: An expert system approach to land cover classification

    E-Print Network [OSTI]

    Ramsey, Michael

    such as land use data, spatial texture, and digital elevation models (DEMs) to obtain greater classificationMonitoring urban land cover change: An expert system approach to land cover classification with Landsat Thematic Mapper (TM) data to derive a land cover classification for the semiarid Phoenix

  8. Neutrino geophysics with KamLAND and future prospects

    E-Print Network [OSTI]

    S. Enomoto; E. Ohtani; K. Inoue; A. Suzuki

    2005-10-20

    The Kamioka liquid scintillator anti-neutrino detector (KamLAND) is a low-energy and low-background neutrino detector which could be a useful probe for determining the U and Th abundances of the Earth. We constructed a model of the Earth in order to evaluate the rate of geologically produced anti-neutrinos (geo-neutrinos) detectable by KamLAND. We found that KamLAND can be used to determine the absolute abundances of U and Th in the Earth with an accuracy sufficient for placing important constraints on Earth's accretional process and succeeding thermal history. The present observation of geo-neutrinos with KamLAND is consistent with our model prediction based on the bulk silicate Earth (BSE) composition within the uncertainty of the measurement. If a neutrino detector were to be built in Hawaii, where effects of the continental crust would be negligible, it could be used to estimate the U and Th content in the lower mantle and the core. Our calculation of the geo-neutrino event rate on the Earth's surface indicates that geo-neutrino observation can provide key information for testing the current models for the content and distribution of U and Th in the Earth.

  9. International interactive

    E-Print Network [OSTI]

    Nielsen, Finn Årup

    and interact with the same visualization. The researchers can be situated anywhere on the Internet. Bibli

  10. Assessment of Uncertainties in the Response of the African Monsoon Precipitation to Land Use change simulated by a regional model

    SciTech Connect (OSTI)

    Hagos, Samson M.; Leung, Lai-Yung R.; Xue, Yongkang; Boone, Aaron; de Sales, Fernando; Neupane, Naresh; Huang, Maoyi; Yoon, Jin-Ho

    2014-02-22

    Land use and land cover over Africa have changed substantially over the last sixty years and this change has been proposed to affect monsoon circulation and precipitation. This study examines the uncertainties on the effect of these changes on the African Monsoon system and Sahel precipitation using an ensemble of regional model simulations with different combinations of land surface and cumulus parameterization schemes. Although the magnitude of the response covers a broad range of values, most of the simulations show a decline in Sahel precipitation due to the expansion of pasture and croplands at the expense of trees and shrubs and an increase in surface air temperature.

  11. Land capability classification of minesoils in East Texas 

    E-Print Network [OSTI]

    Barth, Amy Kristen

    2002-01-01

    for the post-mine land. A land capability classification specific to minesoils will facilitate the design of appropriate land uses or alternative uses for reclaimed mine areas based on observed limitations. The proposed system is similar to the Land...

  12. Surface Drawing Steven Schkolne

    E-Print Network [OSTI]

    . Abstract We present Surface Drawing, a medium which provides direct con- trol over the creation of a wide-immersive 3D display and interaction environment (the Responsive Workbench). This technique allows both be freely explored during the modeling process without the need to plan the construction of the final shape

  13. Surface Drawing Steven Schkolne

    E-Print Network [OSTI]

    Desbrun, Mathieu

    present Surface Drawing, a medium which provides direct con- trol over the creation of a wide range and interaction environment (the Responsive Workbench). This technique allows both novices and experts to create the modeling process without the need to plan the construction of the final shape. In particular it supports un

  14. Quantifying turbidity current interactions with topography

    E-Print Network [OSTI]

    Straub, Kyle M

    2007-01-01

    This thesis advances our understanding of how transport properties of turbidity currents are mediated by interactions with seafloor topography, specifically channelized surfaces. Turbidity currents are responsible for ...

  15. Wind Development on Tribal Lands

    SciTech Connect (OSTI)

    Ken Haukaas; Dale Osborn; Belvin Pete

    2008-01-18

    Background: The Rosebud Sioux Tribe (RST) is located in south central South Dakota near the Nebraska border. The nearest community of size is Valentine, Nebraska. The RST is a recipient of several Department of Energy grants, written by Distributed Generation Systems, Inc. (Disgen), for the purposes of assessing the feasibility of its wind resource and subsequently to fund the development of the project. Disgen, as the contracting entity to the RST for this project, has completed all the pre-construction activities, with the exception of the power purchase agreement and interconnection agreement, to commence financing and construction of the project. The focus of this financing is to maximize the economic benefits to the RST while achieving commercially reasonable rates of return and fees for the other parties involved. Each of the development activities required and its status is discussed below. Land Resource: The Owl Feather War Bonnet 30 MW Wind Project is located on RST Tribal Trust Land of approximately 680 acres adjacent to the community of St. Francis, South Dakota. The RST Tribal Council has voted on several occasions for the development of this land for wind energy purposes, as has the District of St. Francis. Actual footprint of wind farm will be approx. 50 acres. Wind Resource Assessment: The wind data has been collected from the site since May 1, 2001 and continues to be collected and analyzed. The latest projections indicate a net capacity factor of 42% at a hub height of 80 meters. The data has been collected utilizing an NRG 9300 Data logger System with instrumentation installed at 30, 40 and 65 meters on an existing KINI radio tower. The long-term annual average wind speed at 65-meters above ground level is 18.2 mph (8.1 mps) and 18.7 mph (8.4 mps) at 80-meters agl. The wind resource is excellent and supports project financing.

  16. Meeting the Demand for Biofuels: Impact on Land Use and Carbon Mitigation

    SciTech Connect (OSTI)

    Khanna, Madhu; Jain, Atul; Onal, Hayri; Scheffran, Jurgen; Chen, Xiaoguang; Erickson, Matt; Huang, Haixiao; Kang, Seungmo.

    2011-08-14

    The purpose of this research was to develop an integrated, interdisciplinary framework to investigate the implications of large scale production of biofuels for land use, crop production, farm income and greenhouse gases. In particular, we examine the mix of feedstocks that would be viable for biofuel production and the spatial allocation of land required for producing these feedstocks at various gasoline and carbon emission prices as well as biofuel subsidy levels. The implication of interactions between energy policy that seeks energy independence from foreign oil and climate policy that seeks to mitigate greenhouse gas emissions for the optimal mix of biofuels and land use will also be investigated. This project contributes to the ELSI research goals of sustainable biofuel production while balancing competing demands for land and developing policy approaches needed to support biofuel production in a cost-effective and environmentally friendly manner.

  17. A multilevel analysis of effects of land use policy on land-cover change and local land use decisions

    E-Print Network [OSTI]

    Wu, Jianguo "Jingle"

    2014 Available online Keywords: Desertification Household Multi-scale drivers Multilevel statistical (Reynolds et al., 2007). Land degradation, which is often referred to as desertification in drylands (Dregne

  18. Raised land susceptibility of multifunctional epoxy/glass multilayer printed wiring boards

    SciTech Connect (OSTI)

    Lula, J.W.

    1992-03-01

    Three multifunctional epoxy/glass printed wiring board (PWB) laminates, along with standard FR4 laminate from production stores, were evaluated for their susceptibility to raised lands around the plated through-holes of PWBs. However, after thermal stress tests, the angles of the lands were measured in relation to the PWB surface, and the results were surprisingly similar. None of the materials that were tested stood out as being far better than the others in regard to reduced raised land susceptibility. Judging from the Z-axis thermal expansion curves, the similar average and angles measured after thermal stress tests, and rework simulation tests, it was not evident that any of these multifunctional epoxy systems would resolve the recurring problem of raised lands on channel-plated PWB product at Allied-Signal Inc., Kansas City Division. 2 refs.

  19. Raised land susceptibility of multifunctional epoxy/glass multilayer printed wiring boards. Final report

    SciTech Connect (OSTI)

    Lula, J.W.

    1992-03-01

    Three multifunctional epoxy/glass printed wiring board (PWB) laminates, along with standard FR4 laminate from production stores, were evaluated for their susceptibility to raised lands around the plated through-holes of PWBs. However, after thermal stress tests, the angles of the lands were measured in relation to the PWB surface, and the results were surprisingly similar. None of the materials that were tested stood out as being far better than the others in regard to reduced raised land susceptibility. Judging from the Z-axis thermal expansion curves, the similar average and angles measured after thermal stress tests, and rework simulation tests, it was not evident that any of these multifunctional epoxy systems would resolve the recurring problem of raised lands on channel-plated PWB product at Allied-Signal Inc., Kansas City Division. 2 refs.

  20. A framework for benchmarking land models

    E-Print Network [OSTI]

    2012-01-01

    processes (exchanges of water and energy) and biogeochemicalsimulation of the water and energy balance (Pitman, 2003).models. Exchange of water and energy between land sur- face

  1. DEPARTMENT OF LAND RESOURCES AND ENVIRONMENTAL SCIENCES

    E-Print Network [OSTI]

    Lawrence, Rick L.

    of invasive plant species, soil nutrient management, bioremediation, land reclamation ecology of natural systems, chemical fate and transport, water quality, crop

  2. Bureau of Land Management - Final Programmatic Environmental...

    Open Energy Info (EERE)

    Bureau of Land Management - Final Programmatic Environmental Impact Statement for Geothermal Leasing in the Western United States Jump to: navigation, search OpenEI Reference...

  3. Renewable Energy Development on Tribal Lands

    SciTech Connect (OSTI)

    Not Available

    2006-10-01

    Brochure describes the Tribal Energy Program, which provides American Indian tribes with financial and technical assistance for developing renewable energy projects on tribal land.

  4. Renewable Energy Development on Tribal Lands (Brochure)

    SciTech Connect (OSTI)

    2009-01-18

    Brochure describes the Tribal Energy Program, which provides American Indian tribes with financial and technical assistance for developing renewable energy projects on tribal land.

  5. Navajo Hopi Land Commission Office (NHLCO): Navajo Hopi Land Commission Office (NHLCO)- 2012 Project

    Broader source: Energy.gov [DOE]

    The Navajo Hopi Land Commission (NHLCO), together with its partners, will conduct a feasibility study (FS) of a program to develop renewable energy on the Paragon-Bisti ranch lands in northwestern New Mexico, which were set aside under the Navajo-Hopi Land Settlement Act for the benefit of relocatees (defined as Navajo families living on Hopi Partitioned Lands as of December 22, 1974).

  6. Elastic Interactions of Cells

    E-Print Network [OSTI]

    U. S. Schwarz; S. A. Safran

    2002-01-08

    Biological cells in soft materials can be modeled as anisotropic force contraction dipoles. The corresponding elastic interaction potentials are long-ranged ($\\sim 1/r^3$ with distance $r$) and depend sensitively on elastic constants, geometry and cellular orientations. On elastic substrates, the elastic interaction is similar to that of electric quadrupoles in two dimensions and for dense systems leads to aggregation with herringbone order on a cellular scale. Free and clamped surfaces of samples of finite size introduce attractive and repulsive corrections, respectively, which vary on the macroscopic scale. Our theory predicts cell reorientation on stretched elastic substrates.

  7. Land Tenure and Land Administration Issues in Guatemala Danielle Kelly Donovan

    E-Print Network [OSTI]

    Onsrud, Harlan J.

    Land Tenure and Land Administration Issues in Guatemala Danielle Kelly Donovan danielle.donovan@spatial.maine.edu May 2002 1. Abstract The evolution of land tenure in Guatemala is a mix of the native Mayan implementation stage, when the CIA began "Operation Success". The operation sent mercenaries into Guatemala

  8. How emissions, climate, and land use change will impact mid-century air quality over the United States: a focus on effects at national parks

    E-Print Network [OSTI]

    Val Martin, M.

    We use a global coupled chemistry–climate–land model (CESM) to assess the integrated effect of climate, emissions and land use changes on annual surface O[subscript 3] and PM[subscript 2.5] in the United States with a focus ...

  9. Extended Edited Synoptic Cloud Reports from Ships and Land Stations Over the Globe, 1952-1996

    SciTech Connect (OSTI)

    Hahn, C.J.; Warren, S.G.

    1999-08-01

    Surface synoptic weather reports for the entire globe, gathered from various available data sets, were processed, edited, and rewritten to provide a single data set of individual observations of clouds, spanning the 44 years 1952-1995 for ship data and the 26 years 1971-1996 for land station data. In addition to the cloud portion of the synoptic report, each edited report also includes the associated pressure, present weather, wind, air temperature, and dew point (and sea surface temperature over oceans).

  10. Exploring the LandOcean Contrast in Convective Vigor Using Islands F. J. ROBINSON

    E-Print Network [OSTI]

    Sherwood, Steven

    was idealized, with islands represented by regions of uniform surface heat flux without orography, using a rangeExploring the Land­Ocean Contrast in Convective Vigor Using Islands F. J. ROBINSON Department) observations over islands of increasing size to those simulated by a cloud- resolving model. The observed

  11. IEEE Transactions on Geoscience and Remote Sensing, 2002 1 Atmospheric Correction of Landsat ETM+ Land

    E-Print Network [OSTI]

    Liang, Shunlin

    IEEE Transactions on Geoscience and Remote Sensing, 2002 1 Atmospheric Correction of Landsat ETM+ Land Surface Imagery: II. Validation and Applications Shunlin Liang, Senior member, IEEE, Hongliang Fang, Jeffrey T. Morisette, member, IEEE, Mingzhen Chen, Chad J. Shuey, Charles L. Walthall, member

  12. The Impact of Observed Vegetation Changes on LandAtmosphere Feedbacks During Drought

    E-Print Network [OSTI]

    Evans, Jason

    Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Cold and Arid Regions conditions of the advanced research Weather Research and Forecasting (WRF) Model to assess the influence show that modeled air temperature was improved when MODIS data were incorporated, while precipitation

  13. Compositions of subsurface ices at the Mars Phoenix landing site Selby Cull,1

    E-Print Network [OSTI]

    Skemer, Philip

    Compositions of subsurface ices at the Mars Phoenix landing site Selby Cull,1 Raymond E. Arvidson,1 25 October 2010; accepted 2 November 2010; published 22 December 2010. [1] NASA's Phoenix Lander that broke during Robotic Arm operations; and a darker icy deposit. Spectra from the Phoenix Surface Stereo

  14. TS 10 Developing Land Administration Systems Paul van der Molen

    E-Print Network [OSTI]

    TS 10 ­ Developing Land Administration Systems Paul van der Molen TS10.5 Some Microeconomic Aspects Microeconomic Aspects of Land Ownership Paul VAN DER MOLEN, The Netherlands Key words: land administration, microeconomics, institutions, property rights, transaction costs, land markets SUMMARY Land administration ('the

  15. Land Use Planning (3cr.) Spring 2007

    E-Print Network [OSTI]

    Brown, Gregory G.

    , as well as the use of geographic information systems. The environmental approach to land use planning, ENV 2011. Students should also have taken ENV 2010, Geographic Information Systems, or alternatively information system · The ability to do a land suitability analysis Class expectations: This class is designed

  16. LAND USE AND WATER QUALITY MANAGEMENT

    E-Print Network [OSTI]

    #12;LAND USE AND WATER QUALITY MANAGEMENT IN THE BRIDGE CREEK BASIN Prepared for: Water Quality Branch Environmental Protection Dept. BC Environment Victoria, B.C. and Fraser Pollution Abatement Office ..................................................... WATER QUALITY OF UNDISTURBED AREAS ....................... LAND USE EFFECTS ON WATER QUALITY

  17. Oak Ridge reservation land-use plan

    SciTech Connect (OSTI)

    Bibb, W. R.; Hardin, T. H.; Hawkins, C. C.; Johnson, W. A.; Peitzsch, F. C.; Scott, T. H.; Theisen, M. R.; Tuck, S. C.

    1980-03-01

    This study establishes a basis for long-range land-use planning to accommodate both present and projected DOE program requirements in Oak Ridge. In addition to technological requirements, this land-use plan incorporates in-depth ecological concepts that recognize multiple uses of land as a viable option. Neither environmental research nor technological operations need to be mutually exclusive in all instances. Unique biological areas, as well as rare and endangered species, need to be protected, and human and environmental health and safety must be maintained. The plan is based on the concept that the primary use of DOE land resources must be to implement the overall DOE mission in Oak Ridge. This document, along with the base map and overlay maps, provides a reasonably detailed description of the DOE Oak Ridge land resources and of the current and potential uses of the land. A description of the land characteristics, including geomorphology, agricultural productivity and soils, water courses, vegetation, and terrestrial and aquatic animal habitats, is presented to serve as a resource document. Essentially all DOE land in the Oak Ridge area is being fully used for ongoing DOE programs or has been set aside as protected areas.

  18. Theoretical studies of molecular interactions

    SciTech Connect (OSTI)

    Lester, W.A. Jr. [Univ. of California, Berkeley (United States)

    1993-12-01

    This research program is directed at extending fundamental knowledge of atoms and molecules including their electronic structure, mutual interaction, collision dynamics, and interaction with radiation. The approach combines the use of ab initio methods--Hartree-Fock (HF) multiconfiguration HF, configuration interaction, and the recently developed quantum Monte Carlo (MC)--to describe electronic structure, intermolecular interactions, and other properties, with various methods of characterizing inelastic and reaction collision processes, and photodissociation dynamics. Present activity is focused on the development and application of the QMC method, surface catalyzed reactions, and reorientation cross sections.

  19. Journal of the Meteorological Society of Japan, Vol. 82, No. 6, pp. 1679--1693, 2004 1679 Impacts of Re-greening the Desertified Lands in Northwestern China

    E-Print Network [OSTI]

    Wang, Yuqing

    -atmosphere inter- action processes. Desertification and deforesta- tion are two types of land-surface degradations; Hahmann and Dickinson 1997; Kanae et al. 2001; Zeng et al. 2002; Sen et al. 2004). Desertification refers

  20. The Resurgence of Land Reform Policy and Agrarian Movements in Indonesia

    E-Print Network [OSTI]

    Rachman, Noer Fauzi

    2011-01-01

    2006. Tafsir(an) Land Reform dalam Alur Sejarah Indonesia:Bibingka Strategy in Land Reform Implementation: Autonomous2006a. “Redistributive Land Reform in ‘Public (Forest) Land?

  1. Large eddy simulations of surface roughness parameter sensitivity to canopy-structure characteristics

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Maurer, K. D.; Bohrer, G.; Ivanov, V. Y.

    2014-11-27

    Surface roughness parameters are at the core of every model representation of the coupling and interactions between land-surface and atmosphere, and are used in every model of surface fluxes. However, most models assume these parameters to be a fixed property of plant functional type and do not vary them in response to spatial or temporal changes to canopy structure. In part, this is due to the difficulty of reducing the complexity of canopy structure and its spatiotemporal dynamic and heterogeneity to less than a handful of parameters describing its effects of atmosphere–surface interactions. In this study we use large-eddy simulationsmore »to explore, in silico, the effects of canopy structure characteristics on surface roughness parameters. We performed a virtual experiment to test the sensitivity of resolved surface roughness to four axes of canopy structure: (1) leaf area index, (2) the vertical profile of leaf density, (3) canopy height, and (4) canopy gap fraction. We found roughness parameters to be highly variable, but were able to find positive relationships between displacement height and maximum canopy height, aerodynamic canopy height and maximum canopy height and leaf area index, and eddy-penetration depth and gap fraction. We also found negative relationships between aerodynamic canopy height and gap fraction, and between eddy-penetration depth and maximum canopy height and leaf area index. Using a decade of wind and canopy structure observations in a site in Michigan, we tested the effectiveness of our model-resolved parameters in predicting the frictional velocity over heterogeneous and disturbed canopies. We compared it with three other semi-empirical models and with a decade of meteorological observations. We found that parameterizations with fixed representations of roughness performed relatively well. Nonetheless, some empirical approaches that incorporate seasonal and inter-annual changes to the canopy structure performed even better than models with temporally fixed parameters.« less

  2. Painting surface characteristics Pierre Poulin Alain Fournier

    E-Print Network [OSTI]

    Montréal, Université de

    Painting surface characteristics Pierre Poulin Alain Fournier Dept. I.R.O. Dept. of Computer a painting paradigm. An interactive system is provided where the user simply applies color points the surface parameters by simply painting color points on a surface. Each color point is governed

  3. Relating Surface Energy Budgets to the Biochemistry of Photosynthesis

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    the parameterization. Photosynthesis is the process by which plants store solar energy in chemical bonds, thereby of surface energy budgets at the vegetated land surface. A recent parameterization of plant transpiration compounds in specialized plant organelles called chloroplasts. The process involves an energy generation

  4. Achromatic Interaction Point Design

    SciTech Connect (OSTI)

    Guimei Wang,, Yaroslav Derbenev, S.Alex Bogacz, P. Chevtsov, Andre Afanaciev, Charles Ankenbrandt, Valentin Ivanov, Rolland P. Johnson

    2009-05-01

    Designers of high-luminosity energy-frontier muon colliders must provide strong beam focusing in the interaction regions. However, the construction of a strong, aberration-free beam focus is difficult and space consuming, and long straight sections generate an off-site radiation problem due to muon decay neutrinos that interact as they leave the surface of the earth. Without some way to mitigate the neutrino radiation problem, the maximum c.m. energy of a muon collider will be limited to about 3.5 TeV. A new concept for achromatic low beta design is being developed, in which the interaction region telescope and optical correction elements, are installed in the bending arcs. The concept, formulated analytically, combines space economy, a preventative approach to compensation for aberrations, and a reduction of neutrino flux concentration. An analytical theory for the aberration-free, low beta, spatially compact insertion is being developed.

  5. NUMERICAL MODEL FOR LAND SUBSIDENCE IN SHALLOW GROUNDWATER SYSTEMS

    E-Print Network [OSTI]

    Narasimhan, T.N.

    2010-01-01

    and R. L. Klausing, 1969, Land subsidence due to groundwater7612-10874 Fig. S. Land subsidence at Pixley, California:Symposium on Land Subsidence, Anaheim, CA, December 10-

  6. Modeling the impact of agricultural land use and management on US carbon budgets

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Drewniak, B. A.; Mishra, U.; Song, J.; Prell, J.; Kotamarthi, V. R.

    2014-09-22

    Cultivation of the terrestrial land surface can create either a source or sink of atmospheric CO2, depending on land management practices. The Community Land Model (CLM) provides a useful tool to explore how land use and management impact the soil carbon pool at regional to global scales. CLM was recently updated to include representation of managed lands growing maize, soybean, and spring wheat. In this study, CLM-Crop is used to investigate the impacts of various management practices, including fertilizer use and differential rates of crop residue removal, on the soil organic carbon (SOC) storage of croplands in the continental Unitedmore »States over approximately a 170 year period. Results indicate that total US SOC stocks have already lost over 8 Pg C (10%) due to land cultivation practices (e.g., fertilizer application, cultivar choice, and residue removal), compared to a land surface composed of native vegetation (i.e., grasslands). After long periods of cultivation, individual plots growing maize and soybean lost up to 65% of the carbon stored, compared to a grassland site. Crop residue management showed the greatest effect on soil carbon storage, with low and medium residue returns resulting in additional losses of 5% and 3.5%, respectively, in US carbon storage, while plots with high residue returns stored 2% more carbon. Nitrogenous fertilizer can alter the amount of soil carbon stocks significantly. Under current levels of crop residue return, not applying fertilizer resulted in a 5% loss of soil carbon. Our simulations indicate that disturbance through cultivation will always result in a loss of soil carbon, and management practices will have a large influence on the magnitude of SOC loss.« less

  7. Modeling the impact of agricultural land use and management on US carbon budgets

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Drewniak, B. A.; Mishra, U.; Song, J.; Prell, J.; Kotamarthi, V. R.

    2015-04-09

    Cultivation of the terrestrial land surface can create either a source or sink of atmospheric CO2, depending on land management practices. The Community Land Model (CLM) provides a useful tool for exploring how land use and management impact the soil carbon pool at regional to global scales. CLM was recently updated to include representation of managed lands growing maize, soybean, and spring wheat. In this study, CLM-Crop is used to investigate the impacts of various management practices, including fertilizer use and differential rates of crop residue removal, on the soil organic carbon (SOC) storage of croplands in the continental Unitedmore »States over approximately a 170-year period. Results indicate that total US SOC stocks have already lost over 8 Pg C (10%) due to land cultivation practices (e.g., fertilizer application, cultivar choice, and residue removal), compared to a land surface composed of native vegetation (i.e., grasslands). After long periods of cultivation, individual subgrids (the equivalent of a field plot) growing maize and soybean lost up to 65% of the carbon stored compared to a grassland site. Crop residue management showed the greatest effect on soil carbon storage, with low and medium residue returns resulting in additional losses of 5 and 3.5%, respectively, in US carbon storage, while plots with high residue returns stored 2% more carbon. Nitrogenous fertilizer can alter the amount of soil carbon stocks significantly. Under current levels of crop residue return, not applying fertilizer resulted in a 5% loss of soil carbon. Our simulations indicate that disturbance through cultivation will always result in a loss of soil carbon, and management practices will have a large influence on the magnitude of SOC loss.« less

  8. Waste Isolation Pilot Plant, Land Management Plan

    SciTech Connect (OSTI)

    Not Available

    1993-12-01

    To reflect the requirement of section 4 of the Wastes Isolation Pilot Plant Land Withdrawal Act (the Act) (Public Law 102-579), this land management plan has been written for the withdrawal area consistent with the Federal Land Policy and Management Act of 1976. The objective of this document, per the Act, is to describe the plan for the use of the withdrawn land until the end of the decommissioning phase. The plan identifies resource values within the withdrawal area and promotes the concept of multiple-use management. The plan also provides opportunity for participation in the land use planning process by the public and local, State, and Federal agencies. Chapter 1, Introduction, provides the reader with the purpose of this land management plan as well as an overview of the Waste Isolation Pilot Plant. Chapter 2, Affected Environment, is a brief description of the existing resources within the withdrawal area. Chapter 3, Management Objectives and Planned Actions, describes the land management objectives and actions taken to accomplish these objectives.

  9. EA-2000: Proposed Land Transfer to Develop a General Aviation...

    Energy Savers [EERE]

    2000: Proposed Land Transfer to Develop a General Aviation Airport at the East Tennessee Technology Park Heritage Center, Oak Ridge, Tennessee EA-2000: Proposed Land Transfer to...

  10. Hawaii Department of Land and Natural Resources Historic Preservation...

    Open Energy Info (EERE)

    Hawaii Department of Land and Natural Resources Historic Preservation Division Jump to: navigation, search Name: Hawaii Department of Land and Natural Resources Historic...

  11. Hawaii Department of Land and Natural Resources Division of Forestry...

    Open Energy Info (EERE)

    Hawaii Department of Land and Natural Resources Division of Forestry and Wildlife Jump to: navigation, search Name: Hawaii Department of Land and Natural Resources Division of...

  12. Hawaii Department of Land and Natural Resources Commission on...

    Open Energy Info (EERE)

    Hawaii Department of Land and Natural Resources Commission on Water Resource Management Jump to: navigation, search Name: Hawaii Department of Land and Natural Resources Commission...

  13. Clean Cities: Land of Sky Clean Vehicles coalition (Western North...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Land of Sky Clean Vehicles Coalition (Western North Carolina) The Land of Sky Clean Vehicles coalition (Western North Carolina) works with vehicle fleets, fuel providers, community...

  14. Land Acquisition Prepared by: Ben Floyd, Economic & Engineering Services

    E-Print Network [OSTI]

    Land Acquisition Prepared by: Ben Floyd, Economic & Engineering Services May 2004 Introduction Land economy. This may also require that existing agricultural producers need to travel farther

  15. Land Transport Sector in Bangladesh: An Analysis Toward Motivating...

    Open Energy Info (EERE)

    Land Transport Sector in Bangladesh: An Analysis Toward Motivating GHG Emission Reduction Strategies Jump to: navigation, search Name Land Transport Sector in Bangladesh: An...

  16. Sustainable Land Management Through Market-Oriented Commodity...

    Open Energy Info (EERE)

    Sustainable Land Management Through Market-Oriented Commodity Development: Case studies from Ethiopia Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Sustainable Land...

  17. The Public Lands Commission of 1879 

    E-Print Network [OSTI]

    Odom, Danna Evelyn

    1971-01-01

    primary sources for a study of' the Public Lands Commission of i879 are the 2 1 ' rl ~Rt (46 Cong. , 2 . , Ron Rxee tt Document 06), and Thomas Donaldson's The Public Domain. Important background material for the formation of the commission... is provided. by A Letter from the ~Actin Presi- 6* t 8 th Nt' 1~Ad. f S ' ~7?'tt' sess. , House Miscellaneous Document 5), and by the ~Re ort on the Lands of the Arid ~Re ion of the United. States with a Kore Detailecl Account of the Lands of Utah, by John...

  18. Interactive Jobs

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractive Jobs Interactive Jobs To run an interactive

  19. developments. interactive

    E-Print Network [OSTI]

    Jaun, André

    interactive course: ffl web­pages for hyper­linked lecture notes, student exercises and projects, ffl java teachers: ffl public on the web y : lecture notes including the JBONE applet, ffl on demand: source Java

  20. Making land fly : the institutionalization of China's land quota markets and its implications for urbanization, property rights, and intergovernmental politics

    E-Print Network [OSTI]

    Xiao, Yuan, Ph. D. Massachusetts Institute of Technology

    2014-01-01

    This dissertation investigates China's land quota markets, a recent land policy innovation that virtually transfers urbanization permission from the countryside to cities. To circumvent national government's quota restrictions ...

  1. Programmable surfaces

    E-Print Network [OSTI]

    Sun, Amy (Amy Teh-Yu)

    2012-01-01

    Robotic vehicles walk on legs, roll on wheels, are pulled by tracks, pushed by propellers, lifted by wings, and steered by rudders. All of these systems share the common character of momentum transport across their surfaces. ...

  2. Method for large-scale fabrication of atomic-scale structures on material surfaces using surface vacancies

    DOE Patents [OSTI]

    Lim, Chong Wee (Urbana, IL); Ohmori, Kenji (Urbana, IL); Petrov, Ivan Georgiev (Champaign, IL); Greene, Joseph E. (Champaign, IL)

    2004-07-13

    A method for forming atomic-scale structures on a surface of a substrate on a large-scale includes creating a predetermined amount of surface vacancies on the surface of the substrate by removing an amount of atoms on the surface of the material corresponding to the predetermined amount of the surface vacancies. Once the surface vacancies have been created, atoms of a desired structure material are deposited on the surface of the substrate to enable the surface vacancies and the atoms of the structure material to interact. The interaction causes the atoms of the structure material to form the atomic-scale structures.

  3. Land system architecture: Using land systems to adapt and mitigate global environmental change

    SciTech Connect (OSTI)

    Turner, B.L.; Janetos, Anthony C.; Verbug, Peter H.; Murray, Alan T.

    2013-04-01

    Land systems (mosaics of land use and cover) are human environment systems, the changes in which drive and respond to local to global environmental changes, climate to macro-economy (Foley et al., 2005). Changes in land systems have been the principal proximate cause in the loss of habitats and biota globally, long contributed to atmospheric greenhouse gases, and hypothesized to have triggered climate changes in the early Holocene (Ruddiman, 2003). Land use, foremost agriculture, is the largest source of biologically active nitrogen to the atmosphere, critical to sources and sinks of carbon, and a major component in the hydrologic cycle (e.g., Bouwman et al., 2011). Changes in land systems also affect regional climate (Feddema et al., 2005; Pielke, 2005), ecosystem functions, and the array of ecosystem services they provide. Land systems, therefore, are a central feature of how humankind manages its relationship with nature-intended or not, or whether this relationship proceeds sustainably or not.

  4. 2015 Tribal Lands and Environment Forum

    Broader source: Energy.gov [DOE]

    The Institute for Tribal Environmental Professionals (ITEP) are hosting the annual Tribal Lands and Environment Forum. The four-day forum will feature special trainings, field trips, and breakout sessions focused on tribal water programs.

  5. 2015 Tribal Lands and Environment Forum

    Broader source: Energy.gov [DOE]

    The Institute for Tribal Environmental Professionals (ITEP) are hosting the annual Tribal Lands and Environment Forum. The four-day forum will feature special trainings, field trips, and breakout...

  6. A framework for benchmarking land models

    E-Print Network [OSTI]

    2012-01-01

    their inclu- sion in Earth system models (ESMs). State-of-land models cou- pled to Earth system models should simulateland models within Earth system models, however, can help

  7. Modeling Land Biogeochemistry Term Spring 2015

    E-Print Network [OSTI]

    Ma, Lena

    :30 pm or by appointment Course Description Dynamic land models are widely used as part of Earth system models and serve to represent exchange of energy (heat radiation momentum), water, carbon, and nutrients

  8. Northeast Regional Land Cover Change Report

    E-Print Network [OSTI]

    . To learn more about the C-CAP data products used in this report and to access the data sets, please visit% of the total land area. The region has significant coastal-dependent industries, including tourism

  9. Biomass Energy and Competition for Land

    E-Print Network [OSTI]

    Reilly, John

    We describe an approach for incorporating biomass energy production and competition for land into the MIT Emissions Prediction and Policy Analysis (EPPA) model, a computable general equilibrium model of the world economy, ...

  10. Materializing interaction

    E-Print Network [OSTI]

    Coelho, Marcelo

    2013-01-01

    At the boundary between people, objects and spaces, we encounter a broad range of surfaces. Their properties perform functional roles such as permeability, comfort or illumination, while conveying information such as an ...

  11. Keystone rodent interactions: prairie dogs and kangaroo rats structure the biotic composition of a desertified grassland

    E-Print Network [OSTI]

    Davidson, Ana

    Keystone rodent interactions: prairie dogs and kangaroo rats structure the biotic composition. Keystone rodent interactions: prairie dogs and kangaroo rats structure the biotic composition of a desertified grass- land. Á Ecography 29: 755Á765. Understanding the interactive effects of multiple keystone

  12. Constructing use in surface parking lots : strategies for enhancing lots as part-time public spaces

    E-Print Network [OSTI]

    Ziegenfuss, Kathleen Kane

    2009-01-01

    Surface parking lots occupy vast amounts of land in urbanized areas-at times covering up to 40% of land in downtown areas in the United States. It is estimated that there are seven parking spaces for every vehicle in the ...

  13. Paul van der Molen Good Administration of Land in Europe

    E-Print Network [OSTI]

    Paul van der Molen Good Administration of Land in Europe UN, FIG, PC IDEA Inter-regional Special 2004 1/14 Good Administration of Land in Europe Paul van der MOLEN, The Netherlands Keywords: land administration, spatial data infrastructures, land policy, Europe ABSTRACT Europe's history resulted in a variety

  14. Interactive Jobs

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibiting IndividualIntegratingInstituteInteractiveInteractive

  15. Surface Soil

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired Solar Fuel Production 1: TotalofSupplySurface Soil Surface Soil We

  16. Neutrino Properties Before and After KamLAND

    E-Print Network [OSTI]

    S. Pakvasa; J. W. F. Valle

    2003-02-05

    We review neutrino oscillation physics, including the determination of mass splittings and mixings from current solar, atmospheric, reactor and accelerator neutrino data. A brief discussion is given of cosmological and astrophysical implications. Non-oscillation phenomena such as neutrinoless double beta decay would, if discovered, probe the absolute scale of neutrino mass and also reveal their Majorana nature. Non-oscillation descriptions in terms of spin-flavor precession (SFP) and non-standard neutrino interactions (NSI) currently provide an excellent fit of the solar data. However they are at odds with the first results from the KamLAND experiment which imply that, despite their theoretical interest, non-standard mechanisms can only play a sub-leading role in the solar neutrino anomaly. Accepting the LMA-MSW solution, one can use the current solar neutrino data to place important restrictions on non-standard neutrino properties, such as neutrino magnetic moments. Both solar and atmospheric neutrino data can also be used to place constraints on neutrino instability as well as the more exotic possibility of $CPT$ and Lorentz Violation. Weillustrate the potential of future data from experiments such as KamLAND, Borexino and the upcoming neutrino factories in constraining non-standard neutrino properties.

  17. On Surface Approximation using Developable Surfaces

    E-Print Network [OSTI]

    Lee, In-Kwon

    manufacturing, e.g. in shipbuilding. Keywords: computer aided design, computer aided manufacturing, surface ap- proximation, reverse engineering, surface of revolution, developable surface, shipbuilding. 2 #12

  18. Development of the Flux-Adjusting Surface Data Assimilation System for Mesoscale Models

    E-Print Network [OSTI]

    Niyogi, Dev

    Development of the Flux-Adjusting Surface Data Assimilation System for Mesoscale Models KIRAN and temperature and for surface air temperature and water vapor mixing ratio for mesoscale models. In the FASDAS-field variables. The FASDAS is coupled to a land surface submodel in a three-dimensional mesoscale model and tests

  19. Global Climate Change,Global Climate Change, Land Cover Change, andLand Cover Change, and

    E-Print Network [OSTI]

    1 Global Climate Change,Global Climate Change, Land Cover Change, andLand Cover Change, and HydrologyHydrology Steven Fassnacht Watershed Science Colorado State University The Importance of Climate · Climate affects the environment and us ­ Ecology: vegetation and animals ­ Water Systems ­ People

  20. Extended Two Dimensional Nanotube and Nanowire Surfaces as Fuel Cell Catalysts

    E-Print Network [OSTI]

    Alia, Shaun Michael

    2011-01-01

    J. R. Varcoe, R. C. T. Slade, Fuel Cells 2005, 5, 187. T. J.K. J. J. Mayrhofer, M. Arenz, Fuel Cells 2010, 10, 575. L.and Nanowire Surfaces as Fuel Cell Catalysts A Dissertation

  1. Surface Meteorology, Barrow, Alaska, Area A, B, C and D, Ongoing from 2012

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Bob Busey; Larry Hinzman; William Cable; Vladimir Romanovsky

    Meteorological data are being collected at several points within four intensive study areas in Barrow. These data assist in the calculation of the energy balance at the land surface and are also useful as inputs into modeling activities.

  2. Parameter estimation of coupled water and energy balance models based on stationary constraints of surface states

    E-Print Network [OSTI]

    Sun, Jian

    [1] We use a conditional averaging approach to estimate the parameters of a land surface water and energy balance model and then use the estimated parameters to partition net radiation into latent, sensible, and ground ...

  3. Surface Meteorology, Barrow, Alaska, Area A, B, C and D, Ongoing from 2012

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Bob Busey; Larry Hinzman; William Cable; Vladimir Romanovsky

    2014-12-04

    Meteorological data are being collected at several points within four intensive study areas in Barrow. These data assist in the calculation of the energy balance at the land surface and are also useful as inputs into modeling activities.

  4. Symmetry Energy in Nuclear Surface

    E-Print Network [OSTI]

    Pawel Danielewicz; Jenny Lee

    2008-12-25

    Interplay between the dependence of symmetry energy on density and the variation of nucleonic densities across nuclear surface is discussed. That interplay gives rise to the mass dependence of the symmetry coefficient in an energy formula. Charge symmetry of the nuclear interactions allows to introduce isoscalar and isovector densities that are approximately independent of the magnitude of neutron-proton asymmetry.

  5. Carbon Density and Anthropogenic Land Use Influences on Net Land-Use Change Emissions

    SciTech Connect (OSTI)

    Smith, Steven J.; Rothwell, Andrew J.

    2013-10-08

    We examine historical and future land-use emissions using a simple mechanistic carbon-cycle model with regional and ecosystem specific parameterizations. Our central estimate of net terrestrial land-use change emissions, exclusive of climate feedbacks, is 250 GtC over the last three hundred years. This estimate is most sensitive to assumptions for preindustrial forest and soil carbon densities. We also find that estimates are sensitive to the treatment of crop and pasture lands. These sensitivities also translate into differences in future terrestrial uptake in the RCP4.5 land-use scenario. This estimate of future uptake is lower than the native values from the GCAM integrated assessment model result due to lower net reforestation in the RCP4.5 gridded land-use data product

  6. INTERACTIONS BETWEEN ADSORBATE PARTICLES Theodore L. Einstein

    E-Print Network [OSTI]

    Einstein, Theodore L.

    .N. Unertl, (Elsevier, Amsterdam, 1996), Handbook of Surface Science, vol. 1, S. Holloway and N.V. Richardson.2. General Features of Lateral Interaction Energies 11.2.1. Fundamental Ideas 11.2.2. Electronic Indirect

  7. Investigations of multivalent ligand-receptor interactions in microfluidic devices 

    E-Print Network [OSTI]

    Baryshnikova, Olga K.

    2002-01-01

    The objective of the studies presented herein was to obtain thermodynamic data on surface confined multivalent ligand - receptor interactions. Novel microfluidic strategies in conjunction with total internal reflection ...

  8. Results from KamLAND-Zen

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Asakura, K.; Gando, A.; Gando, Y.; Hachiya, T.; Hayashida, S.; Ikeda, H.; Inoue, K.; Ishidoshiro, K.; Ishikawa, T.; Ishio, S.; et al

    2015-07-15

    KamLAND-Zen reports on a preliminary search for neutrinoless double-beta decay with 136Xe based on 114.8 live-days after the purification of the xenon loaded liquid scintillator. In this data, the problematic 110mAg background peak identified in previous searches is reduced by more than a factor of 10. By combining the KamLAND-Zen pre- and post-purification data, we obtain a preliminary lower limit on the 0??? decay half-life of T0?1/2 > 2.6×1025 yr at 90% C.L. The search sensitivity will be enhanced with additional low background data after the purification. As a result, prospects for further improvements with future KamLAND-Zen upgrades are alsomore »presented.« less

  9. Remediation and management of degraded lands

    SciTech Connect (OSTI)

    Wong, M.H.; Wong, J.W.C.; Baker, A.J.M. [eds.

    1999-11-01

    This book presents the program of the first International Conference on the Remediation and Management of Degraded lands. The book has three sections: mine management and rehabilitation, the management of derelict lands, and soil contamination and reclamation. The 34 chapters present a proactive, solution based approach to the rehabilitation of natural resources. Topics of discussions include the following: the multidisciplinary approach practiced by the Australian Center for Minesite Rehabilitation Research; the relationship between biofuel harvesting and Hong Kong`s continuing upland degradation; and experiments with the effectiveness of EDTA/HCI to remove contaminants from soil.

  10. Recent Trends in Land Tenure in Texas. 

    E-Print Network [OSTI]

    Motheral, Joe

    1944-01-01

    IN TEXAS JOE MOTHERAL Division of Farm and Ranch Economics [Blank Page in Original Bulletin] Public interest in the subject of land tenure has been height- ened by the swift changes, in the tenure pattern of the Southwest during the last decade.... In Texas, Common methods of renting farm land such as the "third-and-fourth" system, which is adapted to the growing of annual cash crops, proved to be inadequate in numerous instances where cotton acreage was reduced and a live- stock program...

  11. Effect of surface strain on oxygen adsorption on Zr (0001) surface

    SciTech Connect (OSTI)

    Wang, Xing [Univ. of Wisconsin-Madison, Madison, WI (United States). Dept. of Engineering Physics; Khafizov, Marat [Idaho National Laboratory (INL), Idaho Falls, ID (United States); Szlufarska, Izabela [Univ. of Wisconsin-Madison, Madison, WI (United States). Dept. of Engineering Physics; Univ. of Wisconsin-Madison, Madison, WI (United States). Dept. of Materials Science and Engineering

    2014-02-01

    The effect of surface strain on oxygen adsorption on Zr (0 0 0 1) surface is investigated by density functional theory (DFT) calculations. It is demonstrated that both surface strain and interactions between oxygen adsorbates influence the adsorption process. Oxygen binding to zirconium becomes stronger as the strain changes from compressive to tensile. When oxygen coverage is low and the oxygen interactions are negligible, surface face-centered cubic sites are the most stable for O binding. At high coverage and under compression, octahedral sites between second and third Zr layers become most favorable because the interactions between adsorbates are weakened by positive charge screening. Calculations with both single-layer adsorption model and multiple-layer adsorption model demonstrate that compressive strain at the Zr/oxide interface will provide a thermodynamic driving force for oxygen to incorporate from the surface into the bulk of Zr, while binding oxygen to the Zr surface will be easier when tensile strain is applied.

  12. Ecological perspectives of land use history: The Arid Lands Ecology (ALE) Reserve

    SciTech Connect (OSTI)

    Hinds, N R; Rogers, L E

    1991-07-01

    The objective of this study was to gather information on the land use history of the Arid Land Ecology (ALE) Reserve so that current ecological research could be placed within a historical perspective. The data were gathered in the early 1980s by interviewing former users of the land and from previously published research (where available). Interviews with former land users of the ALE Reserve in Benton County, Washington, revealed that major land uses from 1880 to 1940 were homesteading, grazing, oil/gas production, and road building. Land use practices associated with grazing and homesteading have left the greatest impact on the landscape. Disturbed sites where succession is characterized by non-native species, plots where sagebrush was railed away, and sheep trails are major indications today of past land uses. Recent estimates of annual bunchgrass production do ALE do not support the widespread belief that bunchgrass were more productive during the homesteading era, though the invasion of cheatgrass (Bromus tectorum), Jim Hill mustard (Sisymbrium altissium), and other European alien plant species has altered pre-settlement succession patterns. 15 refs., 6 figs., 1 tab.

  13. Inter-regional comparison of land-use effects on stream metabolism

    SciTech Connect (OSTI)

    Bernot, Melody [Ball State University; Sobota, Daniel [Oregon State University; Hall, Robert [University of Wyoming, Laramie; Mulholland, Patrick J [ORNL; Dodds, Walter [Kansas State University; Webster, Jackson [Virginia Polytechnic Institute and State University (Virginia Tech); Tank, Jennifer [University of Notre Dame, IN; Ashkenas, Linda [Oregon State University, Corvallis; Cooper, Lee W [ORNL; Dahm, Cliff [University of New Mexico, Albuquerque; Gregory, Stanley [Oregon State University, Corvallis; Grimm, Nancy [Arizona State University; Hamilton, Stephen [Michigan State University, East Lansing; Johnson, Sherri [Oregon State University; McDowell, William [University of Hew Hampshire; Meyer, Judy [University of Georgia, Athens, GA; Peterson, Bruce [Marine Biological Laboratory; Poole, Geoffrey C. [Montana State University; Valett, H. Maurice [Virginia Polytechnic Institute and State University (Virginia Tech); Arango, Clay [University of Notre Dame, IN; Beaulieu, Jake [University of Notre Dame, IN; Burgin, Amy [Michigan State University, East Lansing; Crenshaw, Chelsea [University of New Mexico, Albuquerque; Helton, Ashley [University of Georgia, Athens, GA; Johnson, Laura [University of Notre Dame, IN; Merriam, Jeffrey [University of New Hampshire; Niederlehner, Bobbie [Virginia Polytechnic Institute and State University (Virginia Tech); O'Brien, Jon [Michigan State University, East Lansing; Potter, Jody [University of New Hampshire; Sheibley, Rich [Arizona State University; Thomas, Suzanne [Marine Biological Laboratory; Wilson, Kym [Kansas State University

    2010-01-01

    Rates of whole-system metabolism (production and respiration) are fundamental indicators of ecosystem structure and function. Although first-order, proximal controls are well understood, assessments of the interactions between proximal controls and distal controls, such as land use and geographic region, are lacking. Thus, the influence of land use on stream metabolism across geographic regions is unknown. Further, there is limited understanding of how land use may alter variability in ecosystem metabolism across regions. 2. Stream metabolism was measured in nine streams in each of eight regions (n = 72) across the United States and Puerto Rico. In each region, three streams were selected from a range of three land uses: agriculturally influenced, urban-influenced, and reference streams. Stream metabolism was estimated from diel changes in dissolved oxygen concentrations in each stream reach with correction for reaeration and groundwater input. 3. Gross primary production (GPP) was highest in regions with little riparian vegetation (sagebrush steppe in Wyoming, desert shrub in Arizona/New Mexico) and lowest in forested regions (North Carolina, Oregon). In contrast, ecosystem respiration (ER) varied both within and among regions. Reference streams had significantly lower rates of GPP than urban or agriculturally influenced streams. 4. GPP was positively correlated with photosynthetically active radiation and autotrophic biomass. Multiple regression models compared using Akaike's information criterion (AIC) indicated GPP increased with water column ammonium and the fraction of the catchment in urban and reference land-use categories. Multiple regression models also identified velocity, temperature, nitrate, ammonium, dissolved organic carbon, GPP, coarse benthic organic matter, fine benthic organic matter and the fraction of all land-use categories in the catchment as regulators of ER. 5. Structural equation modelling indicated significant distal as well as proximal control pathways including a direct effect of land-use on GPP as well as SRP, DIN, and PAR effects on GPP; GPP effects on autotrophic biomass, organic matter, and ER; and organic matter effects on ER. 6. Overall, consideration of the data separated by land-use categories showed reduced inter-regional variability in rates of metabolism, indicating that the influence of agricultural and urban land use can obscure regional differences in stream metabolism.

  14. Identifying Potential Land Use-derived Solute Sources to Stream Baseflow Using Ground Water Models and GIS

    E-Print Network [OSTI]

    to assess the impact of different baseflow solute contributions to surface water chemistry. Numerous field systems, locations of oil brine fields and high- density human populations) likely exist. Impacts of otherBoutt 1 Identifying Potential Land Use-derived Solute Sources to Stream Baseflow Using Ground Water

  15. TS5 e-Land Administration and e-Government Christiaan Lemmen, Paul van der Molen and Gerda Schennach

    E-Print Network [OSTI]

    for society, e.g. coping with the fast moving property market (e.g. Netherlands), with the 'chain of titles for an increasing market developing from the necessary involvement of land administration data into e public agencies and public structures. e- Government needs to transform the procedures behind the surface

  16. EA-1779: Proposed Changes to the Sanitary Biosolids Land Application Program on the Oak Ridge Reservation, Oak Ridge, Tennessee

    Broader source: Energy.gov [DOE]

    This EA evaluates the environmental impacts of a proposal to amend (e.g., by changing setback requirements from surface water features and potential channels to groundwater) the Sanitary Biosolids Land Application Program at the Oak Ridge Reservation in Oak Ridge, Tennessee.

  17. Climate Effects of Global Land Cover Change

    SciTech Connect (OSTI)

    Gibbard, S G; Caldeira, K; Bala, G; Phillips, T; Wickett, M

    2005-08-24

    There are two competing effects of global land cover change on climate: an albedo effect which leads to heating when changing from grass/croplands to forest, and an evapotranspiration effect which tends to produce cooling. It is not clear which effect would dominate in a global land cover change scenario. We have performed coupled land/ocean/atmosphere simulations of global land cover change using the NCAR CAM3 atmospheric general circulation model. We find that replacement of current vegetation by trees on a global basis would lead to a global annual mean warming of 1.6 C, nearly 75% of the warming produced under a doubled CO{sub 2} concentration, while global replacement by grasslands would result in a cooling of 0.4 C. These results suggest that more research is necessary before forest carbon storage should be deployed as a mitigation strategy for global warming. In particular, high latitude forests probably have a net warming effect on the Earth's climate.

  18. THE UNIVERSITY OF EDINBURGH. Paterson's Land.

    E-Print Network [OSTI]

    Edinburgh, University of

    . Page 9. Internal Access. Page 13. Reception. Page 14. Lift. Page 14. Platform Lifts. Page 15. Stairs staff, students, visitors and contractors. The main Holyrood Campus car park is located off St John Street, to the rear of Paterson's Land (see location map). This is a one way car park which is accessed

  19. State Agency Land Leases Prepared for the

    E-Print Network [OSTI]

    and Energy Reliability Under Cooperative Agreement No. DE-FC26-06NT42847 Hawai`i Distributed Energy Resource: This material is based upon work supported by the United States Department of Energy under Cooperative AgreementState Agency Land Leases Prepared for the U.S. Department of Energy Office of Electricity Delivery

  20. Accuracy Requirements for Rural Land Parcel Boundaries

    E-Print Network [OSTI]

    Stock, Kristin

    Accuracy Requirements for Rural Land Parcel Boundaries Kristin M. Stock School of Planning accuracy of about +/-0.2m. Utilities companies and local authorities in rural areas have more relaxed of Planning, Landscape Architecture and Surveying at Queensland University of Technology, and the Geodetic

  1. Bureau of Land Management Oil Shale Development

    E-Print Network [OSTI]

    Utah, University of

    Bureau of Land Management Oil Shale Development Unconventional Fuels Conference University of Utah May 17, 2011 #12;#12;Domestic Oil Shale Resources Primary oil shale resources in the U.S. are in the Green River Formation in Wyoming, Utah, and Colorado. 72 % of this oil shale resource is on Federal

  2. Arid Lands Ecology Facility management plan

    SciTech Connect (OSTI)

    None

    1993-02-01

    The Arid Lands Ecology (ALE) facility is a 312-sq-km tract of land that lies on the western side of the Hanford Site in southcentral Washington. The US Atomic Energy Commission officially set aside this land area in 1967 to preserve shrub-steppe habitat and vegetation. The ALE facility is managed by Pacific Northwest Laboratory (PNL) for the US Department of Energy (DOE) for ecological research and education purposes. In 1971, the ALE facility was designated the Rattlesnake Hills Research Natural Area (RNA) as a result of an interagency federal cooperative agreement, and remains the largest RNA in Washington. it is also one of the few remaining large tracts of shrub-steppe vegetation in the state retaining a predominant preeuropean settlement character. This management plan provides policy and implementation methods for management of the ALE facilities consistent with both US Department of Energy Headquarters and the Richland Field Office decision (US Congress 1977) to designate and manage ALE lands as an RNA and as a component of the DOE National Environmental Research Park System.

  3. INTERAGENCY REPORT APOLLO 17 LANDING SITE GEOLOGY

    E-Print Network [OSTI]

    Rathbun, Julie A.

    INTERAGENCY REPORT APOLLO 17 LANDING SITE GEOLOGY UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY ASTROGEOLOGY #73 JUNE 1975 Prepared under NASA Contract T-5874A and W13,130 NATIONAL STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY INTERAGENCY REPORT: ASTROGEOLOGY 73 Part I

  4. Influenza A Virus Infections in Land

    E-Print Network [OSTI]

    Clayton, Dale H.

    Influenza A Virus Infections in Land Birds, People's Republic of China A. Townsend Peterson, Sarah for avian in- fluenza viruses. We examined this assumption by sampling and real-time reverse transcription migratory species. Surveillance programs for monitoring spread of these viruses need to be redesigned. Avian

  5. Land Use Baseline Report Savannah River Site

    SciTech Connect (OSTI)

    Noah, J.C.

    1995-06-29

    This document is to serve as a resource for Savannah River Site managers, planners, and SRS stakeholders by providing a general description of the site and land-use factors important to future use decisions and plans. The intent of this document is to be comprehensive in its review of SRS and the surrounding area.

  6. Modification ofregional groundwater regimes by land reclamation

    E-Print Network [OSTI]

    Jiao, Jiu Jimmy

    Modification ofregional groundwater regimes by land reclamation Jiu Jimmy Jiao Department of groundwater regime, in tum causing similar problems. This paper represents the first attempt to address the impact ofreclamation on groundwater regimes. It will be demonstrated that large-scale of reclamation

  7. Land Condition -Trend Analysis Data Dictionary

    E-Print Network [OSTI]

    and wildlife resources to characterize an installation's natural resources in a cost- and time-effective manner (USACERL) developed the Land Condition Trend Analysis (LCTA) program to meet the need for natural resources of natural resources data collection, analysis, and reporting designed to meet multiple goals and objectives

  8. Interactive Jobs

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibiting IndividualIntegratingInstituteInteractive Jobs

  9. Interactive Jobs

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibiting IndividualIntegratingInstituteInteractive

  10. Soil erosion and conservation as affcted by land use and land tenure, El Pital Watershed, Nicaragua 

    E-Print Network [OSTI]

    Somarriba-Chang, Matilde de los Angeles

    1997-01-01

    . This trend is associated with increased fragmentation of farms associated with the agrarian reform activities of the 1980's, during which many of the large land-holdings were confiscated and redistributed to many peasant families. Also the increasing...

  11. November 2009 Land-Use/Land Cover Transitions in Delaware, 2002-2007

    E-Print Network [OSTI]

    Firestone, Jeremy

    of Agriculture & Natural Resources University of Delaware Newark, DE 19717 Abstract: This report quantifies land are distributed as GIS shapefiles from the Office of Statewide Planning Coordination website at http://stateplanning.delaware.gov/info

  12. Predicting the Unit Appraisal Value of the Unimproved and Private Land in the City of Houston by LEED Sustainable Site Credits 

    E-Print Network [OSTI]

    Park, Young Jun

    2011-02-22

    affect this price are 1) its location, size, shape, and slope; 2) town planning controls; 3) constraints on use such as heritage restrictions; 4) any rights connected with ownership of the land such as water rights; and 5) nearby development...). Furthermore, according to the LEED metric, restrictions on land use such as the preservation of prime farmland, habitat, and surface water, brownfield rehabilitation, and public transportation are also important components which affect the sustainable rating...

  13. Symposium Essay: The Energy-Land Use Nexus

    E-Print Network [OSTI]

    Outka, Uma

    2012-01-01

    This Symposium Essay explores the contours of the 'energy-land use nexus' – the rich set of interrelationships between land use and energy production and consumption. This underexplored nexus encapsulates barriers and opportunities as the trajectory...

  14. Land Snail Ecology and Biogeography of Eastern Maine

    E-Print Network [OSTI]

    Nekola, Jeffrey C.

    Land Snail Ecology and Biogeography of Eastern Maine Vertigo bollesiana Vertigo nylanderi Vertigo & Invertebrate Group Maine Department of Inland Fisheries & Wildlife and the Aroostook Hills and Lowlands ......................................................................................................... 75 Appendix I: Taxonomic Key for Maine Land Snails ............................................... 78

  15. Energy Department Releases New Land-Based/Offshore Wind Resource...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Releases New Land-BasedOffshore Wind Resource Map Energy Department Releases New Land-BasedOffshore Wind Resource Map May 1, 2012 - 2:23pm Addthis This is an excerpt from the...

  16. Geothermal Power Plants — Minimizing Land Use and Impact

    Broader source: Energy.gov [DOE]

    For energy production and development, geothermal power plants don't use much land compared to coal and nuclear power plants. And the environmental impact upon the land they use is minimal.

  17. Title 16 USC 818 Public Lands Included in Project - Reservation...

    Open Energy Info (EERE)

    of Lands From Entry Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document- StatuteStatute: Title 16 USC 818 Public Lands Included in Project...

  18. Regulatory Impacts for Renewable Energy Projects on Indian Lands...

    Office of Environmental Management (EM)

    Regulatory Impacts for Renewable Energy Projects on Indian Lands Webinar Regulatory Impacts for Renewable Energy Projects on Indian Lands Webinar June 24, 2015 11:00AM to 12:30PM...

  19. Grout treatment facility land disposal restriction management plan

    SciTech Connect (OSTI)

    Hendrickson, D.W.

    1991-04-04

    This document establishes management plans directed to result in the land disposal of grouted wastes at the Hanford Grout Facilities in compliance with Federal, State of Washington, and Department of Energy land disposal restrictions. 9 refs., 1 fig.

  20. Bureau of Land Management - Techniques for Documenting a No Action...

    Open Energy Info (EERE)

    Bureau of Land Management - Techniques for Documenting a No Action Alternative in an EA Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Bureau of Land...

  1. Conditions and effectiveness of land use as a mobility tool

    E-Print Network [OSTI]

    Zhang, Ming, 1963 Apr. 22-

    2002-01-01

    This dissertation examines the potential of land use as a mobility tool to affect travel, a subject of long and ongoing policy debate. Land use strategies such as densification, mixed-use development, and non-driving-oriented ...

  2. Scenarios of Future Socio-Economics, Energy, Land Use, and Radiative Forcing

    SciTech Connect (OSTI)

    Eom, Jiyong; Moss, Richard H.; Edmonds, James A.; Calvin, Katherine V.; Clarke, Leon E.; Dooley, James J.; Kim, Son H.; Kopp, Roberrt; Kyle, G. Page; Luckow, Patrick W.; Patel, Pralit L.; Thomson, Allison M.; Wise, Marshall A.; Zhou, Yuyu

    2013-04-13

    This chapter explores uncertainty in future scenarios of energy, land use, emissions and radiative forcing that span the range in the literature for radiative forcing, but also consider uncertainty in two other dimensions, challenges to mitigation and challenges to adaptation. We develop a set of six scenarios that we explore in detail including the underlying the context in which they are set, assumptions that drive the scenarios, the Global Change Assessment Model (GCAM), used to produce quantified implications for those assumptions, and results for the global energy and land-use systems as well as emissions, concentrations and radiative forcing. We also describe the history of scenario development and the present state of development of this branch of climate change research. We discuss the implications of alternative social, economic, demographic, and technology development possibilities, as well as potential stabilization regimes for the supply of and demand for energy, the choice of energy technologies, and prices of energy and agricultural commodities. Land use and land cover will also be discussed with the emphasis on the interaction between the demand for bioenergy and crops, crop yields, crop prices, and policy settings to limit greenhouse gas emissions.

  3. Earth Planets Space, 60, 453461, 2008 InSAR-based mapping of surface subsidence in Mokpo City, Korea, using

    E-Print Network [OSTI]

    Amelung, Falk

    Earth Planets Space, 60, 453­461, 2008 InSAR-based mapping of surface subsidence in Mokpo City land in Korea. This reclaimed land is currently experiencing significant ground subsidence due to soil consolidation. We have estimated the subsidence rate of Mokpo City (8 × 8 km) using the synthetic aperture radar

  4. Aircraft Landing Gear Thermo-Tribomechanical Model and Sensitivity Study

    E-Print Network [OSTI]

    Aircraft Landing Gear Thermo-Tribomechanical Model and Sensitivity Study Laurent Heirendt and Hugh-tribomechanical response of an aircraft landing gear shock absorber is presented. Structural damage has been reported sources and sinks in the landing gear shock absorber is developed. The thermo-tribomechanical model

  5. Towards vision-based safe landing for an autonomous helicopter

    E-Print Network [OSTI]

    Sukhatme, Gaurav S.

    Towards vision-based safe landing for an autonomous helicopter Pedro J. Garcia-Pardoa;, Gaurav S from real test ights on a helicopter testbed demonstrate the robustness of the approach under widely di-performance embedded com- puters. Key words: autonomous helicopter, vision-based landing, safe landing, contrast

  6. Montana State University 1 M.S. in Land Rehabilitation

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    Montana State University 1 M.S. in Land Rehabilitation Course work in land rehabilitation is designed to serve students new to the rehabilitation field, as well as to experienced individuals or those already working in land rehabilitation or restoration ecology and who desire further education

  7. PETROLEUM LAND MANAGEMENT (PLMA) Bachelor of Commerce Degree

    E-Print Network [OSTI]

    Calgary, University of

    PETROLEUM LAND MANAGEMENT (PLMA) Bachelor of Commerce Degree The Haskayne School of Business offers a Bachelor of commerce degree with a concentration in Petroleum Land Management that prepares graduates average, and other documentation. Two third-year courses, PLMA 475 (Introduction to Petroleum Land

  8. Bioenergy and land-use competition in Northeast Brazil

    E-Print Network [OSTI]

    Bioenergy and land-use competition in Northeast Brazil Christian Azar Department of Physical of Brazil on "good" versus "bad" lands is investigated. It is shown that the value of the higher yields) lands. The focus of the analysis is on the Northeast of Brazil (NE), where the prospects for dedicated

  9. AUTOMATED LANDING SITE EVALUATION FOR SEMI-AUTONOMOUS

    E-Print Network [OSTI]

    Kochersberger, Kevin

    AUTOMATED LANDING SITE EVALUATION FOR SEMI-AUTONOMOUS UNMANNED AERIAL VEHICLES Dylan Klomparens for a vertical-takeoff-and- landing (VTOL) semi-autonomous unmanned aerial vehicle (UAV) from point cloud data Evaluation © 2008, Dylan Klomparens #12;AUTOMATED LANDING SITE EVALUATION FOR SEMI-AUTONOMOUS UNMANNED AERIAL

  10. Tuesday, March 14, 2006 POSTER SESSION I: PHOENIX LANDING SITE

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Tuesday, March 14, 2006 POSTER SESSION I: PHOENIX LANDING SITE 7:00 p.m. Fitness Center Guinn J. The Engineering Behind Mars Exploration Program 2007 Phoenix Mission Landing Site Selection [#2051] This abstract Characterization of the 2007 Phoenix Mission Landing Sites in the Northern Plains of Mars [#2166] Geomorphology

  11. Tuesday, March 14, 2006 SPECIAL SESSION: PHOENIX LANDING SITE

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Tuesday, March 14, 2006 SPECIAL SESSION: PHOENIX LANDING SITE 5:30 p.m. Marina Plaza Ballroom of the Phoenix Mission Landing Site [#1910] The Phoenix mission will study the subsurface ice discovered in 2002 L. Tyler D. Overview of Mars Exploration Program 2007 Phoenix Mission Landing Site Selection [#1328

  12. Carbon-nitrogen interactions regulate climate-carbon cycle feedbacks: results from an atmosphere-ocean general circulation model

    E-Print Network [OSTI]

    Thornton, P. E.; Doney, S. C.; Lindsay, Keith; Moore, J. K.; Mahowald, N. M.; Randerson, J. T.; Fung, I.; Lamarque, J. F.; Feddema, Johannes J.

    2009-01-01

    Abstract. Inclusion of fundamental ecological interactions between carbon and nitrogen cycles in the land component of an atmosphere-ocean general circulation model (AOGCM) leads to decreased carbon uptake associated ...

  13. Impact of modern climate change on the intercommunication: Global ocean-land (Northern Hemisphere)

    SciTech Connect (OSTI)

    Lobanova, H.V.; Lobanov, V.A.; Stepanenko, S.R.

    1996-12-31

    Two main temperature gradients define the synoptic and climatic conditions on the earth in general: equator-pole gradient and ocean-land gradient. The analysis of temperature on the basis of new cyclic-different-scales conception has been fulfilled in every important part of the climatic system in the Northern Hemisphere for assessment of their vulnerability to modern climate change. Historical time series of monthly surface temperature have been used for this aim in the points of regular grid over the Northern Hemisphere from 1891 to 1992. The main feature of the temperature in main climatic parts of the earth is a complexity of its spatial structure. New methods of spatial decomposition have been developed for the division of this complex fields structure into characteristics of mean value of the field and index of its non-homogeneity or spatial variation. It has been established, that the temperature gradient between ocean and land is increasing that is characterized of the increasing of an intensity of synoptic processes, their spatial non-homogeneity and more frequent appearance of the extreme synoptic events. The models of intercommunications between coefficients of temperature spatial decomposition over the ocean and land have been developed for two time period and the increasing of the relationships closeness has been established between ocean and land as well as the decrease of main planet gradient: the pole(the Polar ocean)-equator.

  14. Tropical Africa: Land Use, Biomass, and Carbon Estimates for 1980 (NDP-055)

    SciTech Connect (OSTI)

    Brown, S.

    2002-04-16

    This document describes the contents of a digital database containing maximum potential aboveground biomass, land use, and estimated biomass and carbon data for 1980. The biomass data and carbon estimates are associated with woody vegetation in Tropical Africa. These data were collected to reduce the uncertainty associated with estimating historical releases of carbon from land use change. Tropical Africa is defined here as encompassing 22.7 x 10{sup 6} km{sup 2} of the earth's land surface and is comprised of countries that are located in tropical Africa (Angola, Botswana, Burundi, Cameroon, Cape Verde, Central African Republic, Chad, Congo, Benin, Equatorial Guinea, Ethiopia, Djibouti, Gabon, Gambia, Ghana, Guinea, Ivory Coast, Kenya, Liberia, Madagascar, Malawi, Mali, Mauritania, Mozambique, Namibia, Niger, Nigeria, Guinea-Bissau, Zimbabwe (Rhodesia), Rwanda, Senegal, Sierra Leone, Somalia, Sudan, Tanzania, Togo, Uganda, Burkina Faso (Upper Volta), Zaire, and Zambia). The database was developed using the GRID module in the ARC/INFO{trademark} geographic information system. Source data were obtained from the Food and Agriculture Organization (FAO), the U.S. National Geophysical Data Center, and a limited number of biomass-carbon density case studies. These data were used to derive the maximum potential and actual (ca. 1980) aboveground biomass values at regional and country levels. The land-use data provided were derived from a vegetation map originally produced for the FAO by the International Institute of Vegetation Mapping, Toulouse, France.

  15. Project Reports for Navajo Hopi Land Commission Office (NHLCO): Navajo Hopi Land Commission Office (NHLCO)- 2012 Project

    Broader source: Energy.gov [DOE]

    The Navajo Hopi Land Commission (NHLCO), together with its partners, will conduct a feasibility study (FS) of a program to develop renewable energy on the Paragon-Bisti ranch lands in northwestern New Mexico, which were set aside under the Navajo-Hopi Land Settlement Act for the benefit of relocatees (defined as Navajo families living on Hopi Partitioned Lands as of December 22, 1974).

  16. An international land-biosphere model benchmarking activity for the IPCC Fifth Assessment Report (AR5)

    SciTech Connect (OSTI)

    Hoffman, Forrest M [ORNL; Randerson, James T [ORNL; Thornton, Peter E [ORNL; Bonan, Gordon [National Center for Atmospheric Research (NCAR); Erickson III, David J [ORNL; Fung, Inez [University of California, Berkeley

    2009-12-01

    The need to capture important climate feedbacks in general circulation models (GCMs) has resulted in efforts to include atmospheric chemistry and land and ocean biogeochemistry into the next generation of production climate models, called Earth System Models (ESMs). While many terrestrial and ocean carbon models have been coupled to GCMs, recent work has shown that such models can yield a wide range of results (Friedlingstein et al., 2006). This work suggests that a more rigorous set of global offline and partially coupled experiments, along with detailed analyses of processes and comparisons with measurements, are needed. The Carbon-Land Model Intercomparison Project (C-LAMP) was designed to meet this need by providing a simulation protocol and model performance metrics based upon comparisons against best-available satellite- and ground-based measurements (Hoffman et al., 2007). Recently, a similar effort in Europe, called the International Land Model Benchmark (ILAMB) Project, was begun to assess the performance of European land surface models. These two projects will now serve as prototypes for a proposed international land-biosphere model benchmarking activity for those models participating in the IPCC Fifth Assessment Report (AR5). Initially used for model validation for terrestrial biogeochemistry models in the NCAR Community Land Model (CLM), C-LAMP incorporates a simulation protocol for both offline and partially coupled simulations using a prescribed historical trajectory of atmospheric CO2 concentrations. Models are confronted with data through comparisons against AmeriFlux site measurements, MODIS satellite observations, NOAA Globalview flask records, TRANSCOM inversions, and Free Air CO2 Enrichment (FACE) site measurements. Both sets of experiments have been performed using two different terrestrial biogeochemistry modules coupled to the CLM version 3 in the Community Climate System Model version 3 (CCSM3): the CASA model of Fung, et al., and the carbon-nitrogen (CN) model of Thornton. Comparisons of the CLM3 offline results against observational datasets have been performed and are described in Randerson et al. (2009). CLM version 4 has been evaluated using C-LAMP, showing improvement in many of the metrics. Efforts are now underway to initiate a Nitrogen-Land Model Intercomparison Project (N-LAMP) to better constrain the effects of the nitrogen cycle in biosphere models. Presented will be new results from C-LAMP for CLM4, initial N-LAMP developments, and the proposed land-biosphere model benchmarking activity.

  17. Impacts of Land-use Changes on Biofuels ORNL History of Exploring Changes in Land Use in the United States

    E-Print Network [OSTI]

    Impacts of Land-use Changes on Biofuels ORNL History of Exploring Changes in Land Use in the United. Building from their work on environmental costs and benefits associated with biofuel production, ORNL positively impact the sustainability of the biofuels industry. Building understanding of land-use change from

  18. NEEC RESEARCH: GPS-DENIED LANDING OF UAVS ON SHIPS 1 NEEC Research: Toward GPS-denied Landing of

    E-Print Network [OSTI]

    Eustice, Ryan

    . The UAV estimates its relative-pose to the landing platform through observations of fiducial markers detections, estimated poses of the UAV and landing platform, and an embedded stream of the UAV's onboard-build-test project focused on the development of a fully autonomous system for landing Navy unmanned aerial vehicles

  19. State Land Commission FAQ | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-Enhancing CapacityVectren) Jumpand Maintenance Geothermal Project | OpenStateLand

  20. How laminar frontal cortex and basal ganglia circuits interact to control planned and reactive saccades

    E-Print Network [OSTI]

    Crawford, Doug

    How laminar frontal cortex and basal ganglia circuits interact to control planned and reactive reactive behaviors are insufficient. This paper proposes a new model, called TELOS, to explain how laminar). In amphibians and all land vertebrates, the BG interact with a laminar structure, the optic tectum (OT), or its

  1. Land Disposal Restrictions (LDR) program overview

    SciTech Connect (OSTI)

    Not Available

    1993-04-01

    The Hazardous and Solid Waste Amendments (HSWA) to the Resource Conservation and Recovery Act (RCRA) enacted in 1984 required the Environmental Protection Agency (EPA) to evaluate all listed and characteristic hazardous wastes according to a strict schedule and to develop requirements by which disposal of these wastes would be protective of human health and the environment. The implementing regulations for accomplishing this statutory requirement are established within the Land Disposal Restrictions (LDR) program. The LDR regulations (40 CFR Part 268) impose significant requirements on waste management operations and environmental restoration activities at DOE sites. For hazardous wastes restricted by statute from land disposal, EPA is required to set levels or methods of treatment that substantially reduce the waste`s toxicity or the likelihood that the waste`s hazardous constituents will migrate. Upon the specified LDR effective dates, restricted wastes that do not meet treatment standards are prohibited from land disposal unless they qualify for certain variances or exemptions. This document provides an overview of the LDR Program.

  2. Soil and Water Science Department University of Florida Background concentrations of trace metals in Florida surface soils

    E-Print Network [OSTI]

    Ma, Lena

    locations, will be analyzed using a SAS statistical program (SAS, 1987). GIS softwares Arc/Info and Arc View surface soils is critical for evaluating land application of non-hazardous waste materials. Concentrations

  3. Enhanced van der Waals interaction at interfaces

    E-Print Network [OSTI]

    Marin-Slobodan Tomas

    2008-02-20

    Using a recently obtained (general) formula for the interaction energy between an excited and a ground-state atom (Sherkunov Y 2007 Phys. Rev. A 75 012705), we consider the interaction energy between two such atoms near the interface between two media. We demonstrate that under the circumstances of the resonant coupling of the excited atom to the surface polariton mode of a vacuum-medium system the nonretarded atom*-atom interaction energy can be enhanced by (several) orders of magnitude in comparison with the van der Waals interaction energy of the two isolated atoms.

  4. Watershed response and land energy feedbacks under climate change depend upon groundwater.

    SciTech Connect (OSTI)

    Maxwell, R M; Kollet, S J

    2008-06-10

    Human induced climate change will have a significant impact on the hydrologic cycle, creating changes in fresh water resources, land cover, and feedbacks that are difficult to characterize, which makes it an issue of global importance. Previous studies have not included subsurface storage in climate change simulations and feedbacks. A variably-saturated groundwater flow model with integrated overland flow and land surface model processes is used to examine the interplay between coupled water and energy processes under climate change conditions. A case study from the Southern Great Plains (SGP) USA, an important agricultural region that is susceptible to drought, is used as the basis for three scenarios simulations using a modified atmospheric forcing dataset to reflect predicted effects due to human-induced climate change. These scenarios include an increase in the atmospheric temperature and variations in rainfall amount and are compared to the present-day climate case. Changes in shallow soil saturation and groundwater levels are quantified as well as the corresponding energy fluxes at the land surface. Here we show that groundwater and subsurface lateral flow processes are critical in understanding hydrologic response and energy feedbacks to climate change and that certain regions are more susceptible to changes in temperature, while others to changes in precipitation. This groundwater control is critical for understanding recharge and drought processes, possible under future climate conditions.

  5. Electrically Controllable Surface Magnetism on the Surface of Topological Insulators Jia-Ji Zhu,1

    E-Print Network [OSTI]

    Electrically Controllable Surface Magnetism on the Surface of Topological Insulators Jia-Ji Zhu,1 magnetism electrically. The gap opened by doped magnetic ions can lead to a short-range Bloembergen 2010; published 28 February 2011) We study theoretically the RKKY interaction between magnetic

  6. Coal surface structure and thermodynamics. Final report

    SciTech Connect (OSTI)

    Larsen, J.W.; Wernett, P.C.; Glass, A.S.; Quay, D.; Roberts, J.

    1994-05-01

    Coals surfaces were studied using static surface adsorption measurements, low angle x-ray scattering (LAXS), inverse gas chromatography (IGC) and a new {sup 13}C NMR relaxation technique. A comparison of surface areas determined by hydrocarbon gas adsorption and LAXS led to the twin conclusions that the hydrocarbons had to diffuse through the solid to reach isolated pores and that the coal pores do not form interconnected networks, but are largely isolated. This conclusion was confirmed when IGC data for small hydrocarbons showed no discontinuities in their size dependence as usually observed with porous solids. IGC is capable of providing adsorption thermodynamics of gases on coal surfaces. The interactions of non-polar molecules and coal surfaces are directly proportioned to the gas molecular polarizability. For bases, the adsorption enthalpy is equal to the polarizability interaction plus the heat of hydrogen bond formation with phenol. Amphoteric molecules have more complex interactions. Mineral matter can have highly specific effects on surface interactions, but with most of the molecules studied is not an important factor.

  7. Surface Emissivity Impact on Temperature and Moisture Soundings from Hyperspectral Infrared Radiance Measurements

    E-Print Network [OSTI]

    Li, Jun

    Surface Emissivity Impact on Temperature and Moisture Soundings from Hyperspectral Infrared June 2010, in final form 13 December 2010) ABSTRACT An accurate land surface emissivity (LSE the emissivities are fixed in the retrieval process. The results also confirm that the simultaneous retrieval

  8. Cosmogenic nuclide surface exposure ages from Nordland, northern Norway: implications for

    E-Print Network [OSTI]

    269 Cosmogenic nuclide surface exposure ages from Nordland, northern Norway: implications.R., Mickelson, D.M., Raisbeck, G.M. & Yiou, F.: Cosmogenic nuclide surface exposure ages from Nord- land cosmogenic nuclides can be used as a measure (i.e. exposure dating) of the duration of subaerial exposure (e

  9. Water and Energy Interactions

    E-Print Network [OSTI]

    McMahon, James E.

    2013-01-01

    produced during coal mining, both surface and groundwatercoal/coal_mining.html 15. Surface Mining Control and

  10. Structural analysis of three global land models on carbon cycle simulations using a traceability framework

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Rafique, R.; Xia, J.; Hararuk, O.; Luo, Y.

    2014-06-27

    Modeled carbon (C) storage capacity is largely determined by the C residence time and net primary productivity (NPP). Extensive research has been done on NPP dynamics but the residence time and their relationships with C storage are much less studied. In this study, we implemented a traceability analysis to understand the modeled C storage and residence time in three land surface models: CSIRO's Atmosphere Biosphere Land Exchange (CABLE) with 9 C pools, Community Land Model (version 3.5) combined with Carnegie-Ames-Stanford Approach (CLM3.5-CASA) with 12 C pools and Community Land Model (version 4) (CLM4) with 26 C pools. The globally averagedmore »C storage and residence time was computed at both individual pool and total ecosystem levels. The spatial distribution of total ecosystem C storage and residence time differ greatly among the three models. The CABLE model showed a closer agreement with measured C storage and residence time in plant and soil pools than CLM3.5-CASA and CLM4. However, CLM3.5-CASA and CLM4 were close to each other in modeled C storage but not with measured data. CABLE stores more C in root whereas CLM3.5-CASA and CLM4 store more C in woody pools, partly due to differential NPP allocation in respective pools. The C residence time in individual C pools is greatly different among models, largely because of different transfer coefficient values among pools. CABLE had higher bulk residence time for soil C pools than the other two models. Overall, the traceability analysis used in this study can help fully characterizes the behavior of complex land models.« less

  11. Green Lands Blue Water 2014 Fall Conference

    Broader source: Energy.gov [DOE]

    The Green Lands Blue Water 2014 Fall Conference will be held from November 19–20, 2014, at the Richland Community College in Decatur, Illinois. The event will focus on bioenergy and sustainable agriculture and explore topics ranging from logistics, energy conversion technologies, and markets for grass biomass. BETO Sustainability Program Technology Manager Kristen Johnson will be speaking about the Energy Department’s perspective on sustainable bioenergy landscapes and will focus on BETO’s recent work with landscape design. The conference will be November 19–20 only. On November 18, participants may choose to participate in a pre-conference field tour.

  12. Ewing Land Development Services | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, AlabamaETEC GmbH JumpEllenville,PowerEvaporative Coolers Jumpin theVillages,Ewing Land

  13. AG Land 1 | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'SHeavyAgencyTendo NewYanbu,Information onAD HydroCompanyAG Land 1

  14. LDK Uni Land JV | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EAInvervar HydroElectric Cooperative(Redirected fromUni Land JV Jump

  15. Montana State Land Board | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsourceII Jump to: navigation, searchsource History ViewMoe WindJump to:VistaLand Board

  16. pv land use | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowa (UtilityMichigan)data book Homefuelleasingoutages Homeplanningpowerpv land

  17. solar land use | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowa (UtilityMichigan)data bookresult formats Home Jweers'ssmartsolar land use

  18. California State Lands Commission | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButte County, California: EnergyNatural Resources Agency Jump to:Assembly JumpLands

  19. Quantifying the effect of land use and land cover changes on green water and blue water in northern part of China 

    E-Print Network [OSTI]

    Liu, X.; Ren, L.; Yuan, F.; Singh, V. P.; Fang, X.; Yu, Z.; Zhang, W.

    2009-06-12

    ) and runoff. The LULC data showed that from 1980 to 1996 grass land and water body had decreased and forest land and crop land had increased. This change caused the evaporation from vegetation interception and vegetation transpiration to increase, whereas...

  20. SELECT BIBLIOGRAPHY OF REPORTS ON BIOFUELS, LAND RIGHTS IN AFRICA & GLOBAL LAND GRABBING

    E-Print Network [OSTI]

    functional at todays date. The majority of the reports are by FAO, GRAIN, SCI-DEV NET, Pambazuka News, IIED, 13 December 2009 http://farmlandgrab.org/9723/print/ Feeding the world in 2050, World Summit on Food investment ­ win-win or land grab?, World Summit on Food Security, Rome, 16-18 November 2009 ftp

  1. Characterizing the Impact of Land Use and Land Cover Change on Freshwater Inflows 

    E-Print Network [OSTI]

    Ferijal, Teuku

    2009-05-15

    . This study proposed to characterize the impact of land use/cover change in the Guadalupe River Watershed on freshwater inflows to the Guadalupe Estuary. Pre-whitening, Mann-Kendall and bootstrap techniques were used to test for significant trends...

  2. Bayesian Calibration of the Community Land Model using Surrogates

    SciTech Connect (OSTI)

    Ray, Jaideep; Hou, Zhangshuan; Huang, Maoyi; Sargsyan, K.; Swiler, Laura P.

    2015-01-01

    We present results from the Bayesian calibration of hydrological parameters of the Community Land Model (CLM), which is often used in climate simulations and Earth system models. A statistical inverse problem is formulated for three hydrological parameters, conditioned on observations of latent heat surface fluxes over 48 months. Our calibration method uses polynomial and Gaussian process surrogates of the CLM, and solves the parameter estimation problem using a Markov chain Monte Carlo sampler. Posterior probability densities for the parameters are developed for two sites with different soil and vegetation covers. Our method also allows us to examine the structural error in CLM under two error models. We find that accurate surrogate models can be created for CLM in most cases. The posterior distributions lead to better prediction than the default parameter values in CLM. Climatologically averaging the observations does not modify the parameters’ distributions significantly. The structural error model reveals a correlation time-scale which can potentially be used to identify physical processes that could be contributing to it. While the calibrated CLM has a higher predictive skill, the calibration is under-dispersive.

  3. Bayesian calibration of the Community Land Model using surrogates

    SciTech Connect (OSTI)

    Ray, Jaideep; Hou, Zhangshuan; Huang, Maoyi; Swiler, Laura Painton

    2014-02-01

    We present results from the Bayesian calibration of hydrological parameters of the Community Land Model (CLM), which is often used in climate simulations and Earth system models. A statistical inverse problem is formulated for three hydrological parameters, conditional on observations of latent heat surface fluxes over 48 months. Our calibration method uses polynomial and Gaussian process surrogates of the CLM, and solves the parameter estimation problem using a Markov chain Monte Carlo sampler. Posterior probability densities for the parameters are developed for two sites with different soil and vegetation covers. Our method also allows us to examine the structural error in CLM under two error models. We find that surrogate models can be created for CLM in most cases. The posterior distributions are more predictive than the default parameter values in CLM. Climatologically averaging the observations does not modify the parameters' distributions significantly. The structural error model reveals a correlation time-scale which can be used to identify the physical process that could be contributing to it. While the calibrated CLM has a higher predictive skill, the calibration is under-dispersive.

  4. GIS-Based Cellular Automaton Model to allocate Kansas High Plains Irrigated Agriculture Land Use

    E-Print Network [OSTI]

    Chiu, Peiwen

    2014-04-08

    GIS-Based Cellular Automaton Model to Allocate Irrigated Agriculture Land Use Peiwen Chiu Kansas State University GIS Day 2013 November 20, 2013 University of Kansas High Plains/Ogallala Aquifer 8 States 186,000 mi2 480,000 km2 http...://www.nytimes.com/interactive/2013/05/16/us/an-underground-pool-drying-up.html?ref=us Aquifer Decline When amount of water diverted in the zone of influence is greater than recharge, this will result decline in the water level in the Aquifer. Most concentrated irrigated...

  5. RAPID/Geothermal/Land Access/Washington | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onRAPID/Geothermal/Exploration/Colorado < RAPID‎ |RAPID/Geothermal/LandRAPID/Geothermal/LandRAPID/Geothermal/Land

  6. Analysis of Impacts on Prime or Unique Agricultural Lands in...

    Energy Savers [EERE]

    on Analysis of Impacts on Prime or Unique Agricultural Lands in Implementing the National Environmental Policy Act was developed in cooperation with the Department of Agriculture....

  7. Energy Corridors on Federal Lands | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    lands throughout the United States. Energy corridors would help address growing energy demand by facilitating future siting of oil, gas, and hydrogen pipelines and electricity...

  8. Coordination of Federal Transmission Permitting on Federal Lands...

    Energy Savers [EERE]

    federal agencies, states and tribes involved in the siting and permitting process for electric transmission facilities on Federal land. The MOU will improve uniformity,...

  9. Oregon Department of Land Conservation and Development - Farmland...

    Open Energy Info (EERE)

    Not Provided DOI Not Provided Check for DOI availability: http:crossref.org Online Internet link for Oregon Department of Land Conservation and Development - Farmland Protection...

  10. Geothermal Direct-Use — Minimizing Land Use and Impact

    Office of Energy Efficiency and Renewable Energy (EERE)

    With geothermal direct-use applications, land use issues usually only arise during exploration and development when geothermal reservoirs are located in or near urbanized areas, critical habitat...

  11. Bureau of Land Management, Colorado collaborate to advance efficient...

    Open Energy Info (EERE)

    Bureau of Land Management, Colorado collaborate to advance efficient geothermal development Jump to: navigation, search OpenEI Reference LibraryAdd to library Memorandum: Bureau of...

  12. Bureau of Land Management - Notice of Intent to Conduct Geothermal...

    Open Energy Info (EERE)

    Bureau of Land Management - Notice of Intent to Conduct Geothermal Resource Exploration Operations Jump to: navigation, search OpenEI Reference LibraryAdd to library Form: Bureau...

  13. Texas General Land Office Construction Certificate and Dune Protection...

    Open Energy Info (EERE)

    OpenEI Reference LibraryAdd to library PermittingRegulatory Guidance - Checklist: Texas General Land Office Construction Certificate and Dune Protection Permit Requirements...

  14. Wind Power Siting: Public Acceptance and Land Use

    Wind Powering America (EERE)

    by the Alliance for Sustainable Energy, LLC. Wind Power Siting: Public Acceptance and Land Use Suzanne Tegen WINDExchange Webinar June 17, 2015 2 Overview * Current NREL Research *...

  15. 11.4 CLIP: CLIMATE-LAND INTERACTION PROJECT--INVESTIGATING HUMAN-CLIMATE INTERACTIONS IN EAST AFRICA

    E-Print Network [OSTI]

    AFRICA Brent M. Lofgren* Great Lakes Environmental Research Laboratory, Ann Arbor, Michigan Nathan J Africa is a region with an economy that is rapidly developing in a variety of sectors, an ex- panding to have significant effects on climate in other parts of Africa, leading to feedback between vegetation

  16. Demonstrating a Market-Based Approach to the Reclamation of Mined Lands in West Virginia

    SciTech Connect (OSTI)

    John W. Goodrich-Mahoney; Paul Ziemkiewicz

    2006-07-19

    This is the third quarter progress report of Phase II of a three-phase project to develop and evaluate the efficacy of developing multiple environmental market trading credits on a partially reclaimed surface mined site near Valley Point, Preston County, WV. Construction of the passive acid mine drainage (AMD) treatment system was completed but several modifications from the original design had to be made following the land survey and during construction to compensate for unforeseen circumstances. We continued to collect baseline quality data from the Conner Run AMD seeps to confirm the conceptual and final design for the passive AMD treatment system.

  17. Regulations for Land Disturbing Activities (North Carolina)

    Broader source: Energy.gov [DOE]

    The law requires installation and maintenance of sufficient erosion control practices to retain sediment within the boundaries of the site. It also requires that surfaces be non-erosive and stable...

  18. Moving towards pro-poor systems of land administration: Challenges for land and asset distribution in Africa

    E-Print Network [OSTI]

    Deininger, Klaus

    2009-01-01

    and Management in Africa." IIED Issues Paper 120. London:Custom and commonage in Africa: Rethinking the orthodoxies."Land Registration in Africa: The Impact on Agricultural

  19. Compact submanifolds supporting singular interactions

    SciTech Connect (OSTI)

    Kaynak, Burak Tevfik Teoman Turgut, O.

    2013-12-15

    A quantum particle moving under the influence of singular interactions on embedded surfaces furnish an interesting example from the spectral point of view. In these problems, the possible occurrence of a bound-state is perhaps the most important aspect. Such systems can be introduced as quadratic forms and generically they do not require renormalization. Yet an alternative path through the resolvent is also beneficial to study various properties. In the present work, we address these issues for compact surfaces embedded in a class of ambient manifolds. We discover that there is an exact bound state solution written in terms of the heat kernel of the ambient manifold for a range of coupling strengths. Moreover, we develop techniques to estimate bounds on the ground state energy when several surfaces, each of which admits a bound state solution, coexist. -- Highlights: •Schrödinger operator with singular interactions supported on compact submanifolds. •Exact bound-state solution in terms of the heat kernel of the ambient manifold. •Generalization of the variational approach to a collection of submanifolds. •Existence of a lower bound for a unique ground state energy.

  20. WILDLAND FIRE SERVICES CENTER FOR ENVIRONMENTAL MANAGEMENT OF MILITARY LANDS

    E-Print Network [OSTI]

    products and services to assist military land managers and range operations personnel in protecting against is already in place. Fire Management Planning CEMML provides high quality fire management planning adviceWILDLAND FIRE SERVICES CENTER FOR ENVIRONMENTAL MANAGEMENT OF MILITARY LANDS CEMML | 1490 Campus

  1. Assessment of Biomass Resources from Marginal Lands in APEC Economies

    SciTech Connect (OSTI)

    Milbrandt, A.; Overend, R. P.

    2009-08-01

    The goal of this study is to examine the marginal lands in Asia-Pacific Economic Cooperation (APEC) economies and evaluate their biomass productivity potential. Twelve categories of marginal lands are identified using the Global Agro-Ecological Zones system of the United Nations Food and Agriculture Organization.

  2. Analysis of Land Suitable for Algae State of Hawaii

    E-Print Network [OSTI]

    Analysis of Land Suitable for Algae Production State of Hawaii Prepared for the U.S. Department agency thereof. #12;Analysis of Land Suitable for Algae Production State of Hawaii Prepared by Mele University of Hawaii at Manoa August 2011 #12;i Executive Summary Algae are considered to be a viable crop

  3. Can land management and biomass utilization help mitigate global warming?

    SciTech Connect (OSTI)

    Schlamadinger, B.; Lauer, M.

    1996-12-31

    With rising concern about the increase of the CO{sub 2} concentration in the earth`s atmosphere there is considerable interest in various land-use based mitigation options, like afforestation of surplus agricultural land with or without subsequent harvest; improved forest management; strategies that rely on wood plantations managed in short rotation or agricultural crops with high yields to produce bioenergy, timber and other biomass products. In the first step of this study, the net carbon benefits of such strategies will be calculated per unit of land, i.e., per hectare, because it is assumed that land is the limiting resource for such strategies in the future, and thus, the benefits per unit land need to be optimized. For these calculations a computer model has been developed. The results take into account the time dependence of carbon storage in the biosphere and are shown graphically both for land and for plantation systems with constant output of biomass over time. In the second step, these results will be combined with data on available land for Austria. The potential contribution of each of the above strategies towards mitigating the Austrian CO{sub 2} emissions will be demonstrated. A comparison to other renewable mitigation options, like solar thermal or photovoltaics, will be drawn in terms of available land resources and overall CO{sub 2} reductions.

  4. Gulf of Mexico Regional Land Cover Change Report

    E-Print Network [OSTI]

    Gulf of Mexico Regional Land Cover Change Report 1996­2010 #12;About This Report The Gulf of Mexico at www.coast.noaa.gov. #12;GULF OF MEXICO REGIONAL LAND COVER CHANGE REPORT, 1996­2010 THE GULF OF MEXICO REGION covers over 200,400 square miles and extends from Texas'border with Mexico in the west to the tip

  5. Hawaii Bioenergy Master Plan Land and Water Resources

    E-Print Network [OSTI]

    with phytoremediation and bioremediation processes; · Document methods to increase water use efficiency for bioenergyHawaii Bioenergy Master Plan Land and Water Resources Submitted to Hawaii Natural Energy Institute of any bioenergy crops in Hawaii is the availability of the land and water necessary to produce

  6. Views of Private-Land Stewardship among Latinos on the

    E-Print Network [OSTI]

    Langerhans, Brian

    predictors of private-land steward- ship (PLS), its definitions, and what people feel they owe stewardship Sciences, Texas A&M University. Jianguo Liu, Center for Systems Integration and Sustainability, Department to voluntarily promote sustainable land-use practices. Such voluntary protection is often labeled stewardship

  7. POST-CONFLICT LAND ADMINISTRATION WITHIN THE PROCESS OF

    E-Print Network [OSTI]

    POST-CONFLICT LAND ADMINISTRATION WITHIN THE PROCESS OF POST-CONFLICT STATE BUILDING; CASE KOSOVO and Post-Conflict Environment Land Administration in Post-Conflict Environment Post-Conflict State Building-conflict state building Figure 1: Conceptual Research design #12;KOSOVO ­ MAIN CASE STUDY Field work ­ 2 weeks

  8. Global Consequences of Land Use Jonathan A. Foley,1

    E-Print Network [OSTI]

    Schweik, Charles M.

    , fiber, water, and shelter to more than six billion people. Global croplands, pastures, plantations in atmospheric composition to the extensive modification of Earth_s ecosystems (3­6). For example, land and ecosystem services, such as food, fiber, shelter, and fresh- water. On the other hand, some forms of land

  9. The Impact of Biofuel Mandates on Land Use Suhail Ahmad

    E-Print Network [OSTI]

    The Impact of Biofuel Mandates on Land Use by Suhail Ahmad B.E., Avionics Engineering National, Technology and Policy Program #12;#12;3 The Impact of Biofuel Mandates on Land Use by Suhail Ahmad Submitted of Master of Science in Technology and Policy ABSTRACT The use of biofuels in domestic transportation sector

  10. Climate change and land use in Florida: Interdependencies and opportunities

    E-Print Network [OSTI]

    Watson, Craig A.

    Climate change and land use in Florida: Interdependencies and opportunities Stephen Mulkey, Ph June 2007 Revised 30 September 2007 #12;Climate change and land use ­ Report to the Century Commission - S. Mulkey, June 2007 2 Executive summary Over this century anthropogenic climate change will present

  11. Geospatial Analysis of Renewable Energy Technical Potential on Tribal Lands

    SciTech Connect (OSTI)

    Doris, E.; Lopez, A.; Beckley, D.

    2013-02-01

    This technical report uses an established geospatial methodology to estimate the technical potential for renewable energy on tribal lands for the purpose of allowing Tribes to prioritize the development of renewable energy resources either for community scale on-tribal land use or for revenue generating electricity sales.

  12. Technical Note/ Impact of Coastal Land Reclamation on

    E-Print Network [OSTI]

    Jiao, Jiu Jimmy

    of fresh ground water resource because the reclaimed land can be an additional aquifer and rain rechargeTechnical Note/ Impact of Coastal Land Reclamation on Ground Water Level and the Sea Water a significant effect on local ground water systems. Steady-state analytic solutions based on Dupuit and Ghyben

  13. Urban Land Use and Transportation Center University of California, Davis

    E-Print Network [OSTI]

    California at Davis, University of

    Urban Land Use and Transportation Center University of California, Davis The Urban Land Use and Transportation Center (ULTRANS) at the UC Davis Institute of Transportation Studies (ITS-Davis) is tackling-Davis researchers have provided strong input to the design and analysis of the entire array of California's proposed

  14. Urban Surfaces and Heat Island Mitigation Potentials

    SciTech Connect (OSTI)

    Akbari, Hashem; Akbari, Hashem; Shea Rose, Leanna

    2007-06-14

    Data on materials and surface types that comprise a city, i.e. urban fabric, are needed in order to estimate the effects of light-colored surfaces (roofs and pavements) and urban vegetation (trees, grass, shrubs) on the meteorology and air quality of a city. We discuss the results of a semi-automatic statistical approach used to develop data on surface-type distribution and urban-fabric makeup using aerial color orthophotography, for four metropolitan areas of Chicago, IL, Houston, TX, Sacramento, CA, and Salt Lake City, UT. The digital high resolution (0.3 to 0.5-m) aerial photographs for each of these metropolitan areas covers representative urban areas ranging from 30 km{sup 2} to 52 km{sup 2}. Major land-use types examined included: commercial, residential, industrial, educational, and transportation. On average, for the metropolitan areas studied, vegetation covers about 29-41% of the area, roofs 19-25%, and paved surfaces 29-39%. For the most part, trees shade streets, parking lots, grass, and sidewalks. At ground level, i.e., view from below the tree canopies, vegetation covers about 20-37% of the area, roofs 20-25%, and paved surfaces 29-36%.

  15. USER INTERACTION WITH CAD MODELS WITH NONHOLONOMIC PARAMETRIC SURFACE CONSTRAINTS

    E-Print Network [OSTI]

    Utah, University of

    during the early, formulative design stages into kinematic and dynamic characteristics of a mechanism. We is an interesting case that can come up in kinematic and dynamic analysis of knee or spatial cam mechanisms present the advan- tages of kinematic representation of constraint equations in fully Cartesian

  16. A Delaunay approach to interactive cutting in triangulated surfaces

    E-Print Network [OSTI]

    Utrecht, Universiteit

    , where the matrix is called sti#ness matrix. Finding a solution is a two step process: first, the sti#ness matrix is constructed, then the unknowns (a set of deformations) are computed from the sti#ness matrix of the solution process in finite precision arithmetic is determined by the condition num­ ber of the sti#ness

  17. From Digital to Physical: Learning Physical Computing on Interactive Surfaces

    E-Print Network [OSTI]

    by empowering users to program an Arduino application visually, while the result- ing code is simultaneously or new components may not have been acquired. More sophisticated IO-Boards such as Arduino2 allow users Arduino [3]) or digital representations of hardware setups (e.g. with Fritzing [2]) help users in learning

  18. Interaction between surface and atmosphere in a convective boundary layer /

    E-Print Network [OSTI]

    Garai, Anirban

    2013-01-01

    of cold fluid constitute most of the heat transport andevent cold air descends to the ground, heat transport fromcold air during sweep events. The convective boundary layer has a great influence on moisture transport,

  19. Surface Drawing Steven Schkolne # Peter Schroder +

    E-Print Network [OSTI]

    . Abstract We present Surface Drawing, a medium which provides direct con­ trol over the creation of a wide­immersive 3D display and interaction environment (the Responsive Workbench). This technique allows both be freely explored during the modeling process without the need to plan the construction of the final shape

  20. Creating deformations and tunnels in a surface using layered geometry with adaptive filtering 

    E-Print Network [OSTI]

    Brooks, Jacob Kirk

    2005-11-01

    With this thesis, I present a method for creating footprints and tunnels in a surface through the use of layered geometry. Rather than using a single geometric surface, deformations are created through the interaction of a polygonal object...