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1

A Nano Surface Icephobic Coating Delays Ice Formation | GE Global...  

NLE Websites -- All DOE Office Websites (Extended Search)

health-monitoring sensors, non-icing surfaces, nano-enabled media storage and optoelectronic devices. She enjoys time with her son, exercise and reading. Recent Posts by This...

2

Ice nanoclusters at hydrophobic metal surfaces  

E-Print Network (OSTI)

and characterization of metal-supported water hexamers and a family of hydrated nanoclusters-- heptamers, octamers to nucleate through the presence of an `ice nucleating agent': a microscopic seed particle of salt, sand or such as the formation of new water structures not observed in the gas phase, altered H-bond strengths or different

3

Ice friction: The effects of surface roughness, structure, and hydrophobicity  

SciTech Connect

The effect of surface roughness, structure, and hydrophobicity on ice friction is studied systematically over a wide range of temperature and sliding speeds using several metallic interfaces. Hydrophobicity in combination with controlled roughness at the nanoscale is achieved by femtosecond laser irradiation to mimic the lotus effect on the slider's surface. The controlled roughness significantly increases the coefficient of friction at low sliding speeds and temperatures well below the ice melting point. However, at temperatures close to the melting point and relatively higher speeds, roughness and hydrophobicity significantly decrease ice friction. This decrease in friction is mainly due to the suppression of capillary bridges in spite of the presence of surface asperities that facilitate their formation. Finally, grooves oriented in the sliding direction also significantly decrease friction in the low velocity range compared to scratches and grooves randomly distributed over a surface.

Kietzig, Anne-Marie; Hatzikiriakos, Savvas G.; Englezos, Peter [Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, British Columbia V6T 1Z3 (Canada)

2009-07-15T23:59:59.000Z

4

Electric resistance of water films on the surface of ice near the phase transition temperature  

Science Journals Connector (OSTI)

The electric resistance of the surface layer of a polycrystalline ... ice melting, a monotonic decrease in the resistance of the ice surface changes to growth, ... of melting. In the growth stage, the resistance ...

G. S. Bordonski?; S. D. Krylov

2009-04-01T23:59:59.000Z

5

Assessment of Future ICE and Fuel-Cell Powered Vehicles and Their...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Assessment of Future ICE and Fuel-Cell Powered Vehicles and Their Potential Impacts Assessment of Future ICE and Fuel-Cell Powered Vehicles and Their Potential Impacts 2004 Diesel...

6

Greenland ice sheet surface mass balance variability (1988-2004) from calibrated Polar MM5 output*  

E-Print Network (OSTI)

1 Greenland ice sheet surface mass balance variability (1988-2004) from calibrated Polar MM5 output in Environmental Sciences, University of Colorado, Boulder, CO, USA 4 National Snow and Ice Data Center, University coherent regional patterns of Greenland ice sheet surface mass balance (SMB) change over a 17-year period

Howat, Ian M.

7

Sum-frequency spectroscopic studies: I. Surface melting of ice, II. Surface alignment of polymers  

SciTech Connect

Surface vibrational spectroscopy via infrared-visible sum-frequency generation (SFG) has been established as a useful tool to study the structures of different kinds of surfaces and interfaces. This technique was used to study the (0001) face of hexagonal ice (Ih). SFG spectra in the O-H stretch frequency range were obtained at various sample temperatures. For the vapor(air)/ice interface, the degree of orientational order of the dangling OH bonds at the surface was measured as a function of temperature. Disordering sets in around 200 K and increases dramatically with temperature, which is strong evidence of surface melting of ice. For the other ice interfaces (silica/OTS/ice and silica/ice), a similar temperature dependence of the hydrogen bonded OH stretch peak was observed; the free OH stretch mode, however, appears to be different from that of the vapor (air)/ice interface due to interactions at the interfaces. The technique was also used to measure the orientational distributions of the polymer chains on a rubbed polyvinyl alcohol surface. Results show that the polymer chains at the surface appear to be well aligned by rubbing, and the adsorbed liquid crystal molecules are aligned, in turn, by the surface polymer chains. A strong correlation exists between the orientational distributions of the polymer chains and the liquid crystal molecules, indicating that the surface-induced bulk alignment of a liquid crystal film by rubbed polymer surfaces is via an orientational epitaxy-like mechanism. This thesis also contains studies on some related issues that are crucial to the above applications. An experiment was designed to measure SFG spectra in both reflection and transmission. The result confirms that SFG in reflection is generally dominated by the surface contribution. Another issue is the motional effect due to fast orientational motion of molecules at a surface or interface. Calculations show that the effect is significant if the molecular orientation varies over a broad range within the vibrational relaxation time. The stretch vibration of the free OH bonds at the vapor/water interface is used to illustrate the importance of the effect.

Wei, Xing

2000-12-21T23:59:59.000Z

8

ASSESSING THE UTILITY OF MODIS FOR MONITORING SNOW AND SEA ICE EXTENT  

E-Print Network (OSTI)

has begun. For the first time daily, global maps of snow cover and sea ice extent are being produced, global maps of snow cover and sea ice extent are being produced in a fully automated fashion from spaceASSESSING THE UTILITY OF MODIS FOR MONITORING SNOW AND SEA ICE EXTENT G. Scharfen, S. Khalsa U

Oldenburg, Carl von Ossietzky Universität

9

The sensitivity of the Late Saalian (140 ka) and LGM (21 ka) Eurasian ice sheets to sea surface conditions  

E-Print Network (OSTI)

to the climatic cooling effect from the large ice sheet topography. Late Saalian SST are simulated using an AGCM-hemispheric asymmetry caused by the larger ice-albedo feedback, cooling climate. The resulting Late Saalian ice sheetThe sensitivity of the Late Saalian (140 ka) and LGM (21 ka) Eurasian ice sheets to sea surface

Jakobsson, Martin

10

Ice  

NLE Websites -- All DOE Office Websites (Extended Search)

Ice Ice Nature Bulletin No. 661-A january 7, 1978 Forest Preserve District of Cook County George W. Dunne, President Roland F. Eisenbeis, Supt. of Conservation ICE There was a time when ice, cut on frozen ponds and lakes, was transported by fast clipper ships from New England to New Orleans where it was worth its weight in gold. Nowadays this cold brittle colorless substance is commonplace everywhere. Few people, however, know that ice is one of the strangest of all solids; and that, because of its unique properties, life on earth is what it is. Those properties are due to the distinctive structure of a molecule of water, formed of three elemental particles or atoms -- two of hydrogen and one of oxygen -- expressed by the familiar symbol, H2O. The three atoms are held together by two chemical bonds expressed by another symbol, H-O-H. Briefly, the unique properties of water, water vapor, and ice arise from that bonding and the arrangement of electron pairs around the oxygen atom.

11

Determination of Ice Water Path Over the ARM SGP Using Combined Surface and Satellite Datasets  

NLE Websites -- All DOE Office Websites (Extended Search)

Determination of Ice Water Path Over the ARM SGP Using Determination of Ice Water Path Over the ARM SGP Using Combined Surface and Satellite Datasets J. Huang, M. M. Khaiyer, and P. W. Heck Analytical Services & Materials, Inc. Hampton, Virginia P. Minnis and B. Lin Atmospheric Sciences National Aeronautics and Space Administration Langley Research Center Hampton, Virginia T.-F. Fan Science Applications International Corporation Hampton, Virginia Introduction Global information of cloud ice water path (IWP) is urgently needed for testing of global climate models (GCMs) and other applications. Accurate quantification of the IWP is essential for characterizing the hydrological and radiation budget. For example, the reflection of shortwave radiation by ice clouds reduces the solar energy reaching the earth's surface. Ice clouds can also trap the longwave radiation

12

High-Latitude Ocean and Sea Ice Surface Fluxes: Challenges for Climate Research1 Mark A. Bourassa1  

E-Print Network (OSTI)

), and in 2008, the Wilkins Ice Shelf51 collapsed equally quickly (Scambos et al. 2009). Ocean heat content1 High-Latitude Ocean and Sea Ice Surface Fluxes: Challenges for Climate Research1 2 Mark A-latitude surface fluxes will require close collaboration among meteorologists,33 oceanographers, ice physicists

Gille, Sarah T.

13

Determination and Characterization of Ice Propagation Mechanisms on Surfaces Undergoing Dropwise Condensation  

E-Print Network (OSTI)

The mechanisms responsible for ice propagation on surfaces undergoing dropwise condensation have been determined and characterized. Based on experimental data acquired non-invasively with high speed quantitative microscopy, the freezing process...

Dooley, Jeffrey B.

2011-08-08T23:59:59.000Z

14

Surface science investigations of photoprocesses in model interstellar ices  

SciTech Connect

The kinetic energy of benzene and water molecules photodesorbed from astrophysically relevant ices on a sapphire substrate under irradiation by a UV laser tuned to the S{sub 1}(leftarrow)S{sub 0} {pi}{yields}{pi}* transition of benzene has been measured using time-of-flight mass spectrometry. Three distinct photodesorption mechanisms have been identified--a direct adsorbate-mediated desorption of benzene, an indirect adsorbate-mediated desorption of water, and a substrate-mediated desorption of both benzene and water. The translational temperature of each desorbing population was well in excess of the ambient temperature of the ice matrix.

Thrower, J. D.; Collings, M. P.; McCoustra, M. R. S.; Burke, D. J.; Brown, W. A.; Dawes, A.; Holtom, P. D.; Kendall, P.; Mason, N. J.; Jamme, F.; Fraser, H. J.; Clark, I. P.; Parker, A. W. [School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom); Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ (United Kingdom); Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes MK7 6AA (United Kingdom); SOLEIL Synchrotron, BP 48, L'Orme des Merisiers, F-91192 Gif sur Yvette Cedex (France); Department of Physics, Scottish Universities Physics Alliance (SUPA), University of Strathclyde, John Anderson Building, 107 Rottenrow East, Glasgow G4 0NG (United Kingdom); Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX (United Kingdom)

2008-07-15T23:59:59.000Z

15

UV-induced protonation of molecules adsorbed on ice surfaces at low temperature  

SciTech Connect

UV irradiation of ice films adsorbed with methylamine molecules induces protonation of the adsorbate molecules at low temperature (50-130 K). The observation indicates that long-lived protonic defects are created in the ice film by UV light, and they transfer protons to the adsorbate molecules via tunneling mechanism at low temperature. The methylammonium ion formed by proton transfer remains to be stable at the ice surface. It is suggested that this solid-phase protonation might play a significant role in the production of molecular ions in interstellar clouds.

Moon, Eui-Seong; Lee, Chang-Woo; Kim, Joon-Ki; Park, Seong-Chan; Kang, Heon [Department of Chemistry, Seoul National University, Gwanak-gu, Seoul 151-747 (Korea, Republic of)

2008-05-21T23:59:59.000Z

16

The evolution of surface flow stripes and stratigraphic folds within Kamb Ice Stream: why don't they match?  

E-Print Network (OSTI)

from several processes or a combination of processes producing strains within the ice, and an extensive has been shown to produce folds of the internal stratigraphy depicted by ice- penetrating radarThe evolution of surface flow stripes and stratigraphic folds within Kamb Ice Stream: why don

Jacobel, Robert W.

17

Influence of Ice Particle Surface Roughening on the Global Cloud Radiative Effect BINGQI YI,* PING YANG,* BRYAN A. BAUM,1  

E-Print Network (OSTI)

Influence of Ice Particle Surface Roughening on the Global Cloud Radiative Effect BINGQI YI,* PING are developed for se- verely roughened ice particles. The parameterizations are based on a general habit mixture and severely roughened ice particles. While the influence of particle roughening on the single

Baum, Bryan A.

18

High-Latitude Ocean and Sea Ice Surface Fluxes: Challenges for Climate Research Mark A. Bourassa1  

E-Print Network (OSTI)

, the Wilkins Ice Shelf collapsed equally quickly (Scambos et al. 2009). Ocean heat content is rising rapidlyHigh-Latitude Ocean and Sea Ice Surface Fluxes: Challenges for Climate Research Mark A. Bourassa1 conditions for the measurement and estimation of air­sea and ice fluxes, limiting understanding of related

Gille, Sarah T.

19

High-Latitude Ocean and Sea Ice Surface Fluxes: Challenges for Climate Research1 Mark A. Bourassa1  

E-Print Network (OSTI)

), and in 2008, the Wilkins Ice Shelf51 collapsed equally quickly (Scambos et al. 2009). Ocean heat content1 High-Latitude Ocean and Sea Ice Surface Fluxes: Challenges for Climate Research1 2 Mark A conditions for the measurement and estimation of air­27 sea and ice fluxes, limiting understanding of related

Gille, Sarah T.

20

High-Latitude Ocean and Sea Ice Surface Fluxes: Requirements and Challenges for Climate Mark Bourassa1  

E-Print Network (OSTI)

temperatures, seasonal sea ice, and the remoteness of the regions all conspire to make observations difficult latitudes - the vertical exchanges of heat, momentum and material between the ocean, atmosphere and ice1 High-Latitude Ocean and Sea Ice Surface Fluxes: Requirements and Challenges for Climate Research

Gille, Sarah T.

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

A New Model to Construct Ice Stream Surface Elevation Profiles and Calculate Contributions to Sea-Level Rise  

E-Print Network (OSTI)

to produce independent assessments of the state of polar iceproduce these predictions account for thermal expansion, changes in non-polar glaciers and ice

Adachi, Yosuke

2012-01-01T23:59:59.000Z

22

J1.15 PARAMETERIZING THE TURBULENT SURFACE FLUXES OVER SUMMER SEA ICE Edgar L Andreas1*  

E-Print Network (OSTI)

of the surface heat budget for that year at several sites around the SHEBA ice camp (Andreas et al. 1999; Persson1 of 9 J1.15 PARAMETERIZING THE TURBULENT SURFACE FLUXES OVER SUMMER SEA ICE Edgar L Andreas1* , P to study the Surface Heat Budget of the Arctic Ocean (SHEBA) lasted for a year (Uttal et al. 2002). Our

Persson, Ola

23

Mobility of D atoms on porous amorphous water ice surfaces under interstellar conditions  

E-Print Network (OSTI)

Aims. The mobility of H atoms on the surface of interstellar dust grains at low temperature is still a matter of debate. In dense clouds, the hydrogenation of adsorbed species (i.e., CO), as well as the subsequent deuteration of the accreted molecules depend on the mobility of H atoms on water ice. Astrochemical models widely assume that H atoms are mobile on the surface of dust grains even if controversy still exists. We present here direct experimental evidence of the mobility of H atoms on porous water ice surfaces at 10 K. Methods. In a UHV chamber, O2 is deposited on a porous amorphous water ice substrate. Then D atoms are deposited onto the surface held at 10 K. Temperature-Programmed Desorption (TPD) is used and desorptions of O2 and D2 are simultaneously monitored. Results. We find that the amount of O2 that desorb during the TPD diminishes if we increase the deposition time of D atoms. O2 is thus destroyed by D atoms even though these molecules have previously diffused inside the pores of thick water ice. Our results can be easily interpreted if D is mobile at 10 K on the water ice surface. A simple rate equation model fits our experimental data and best fit curves were obtained for a D atoms diffusion barrier of 22(+-)2 meV. Therefore hydrogenation can take place efficiently on interstellar dust grains. These experimental results are in line with most calculations and validate the hypothesis used in several models.

E. Matar; E. Congiu; F. Dulieu; A. Momeni; J. L. Lemaire

2008-10-13T23:59:59.000Z

24

Love wave surface acoustic wave sensor for ice detection on aircraft  

Science Journals Connector (OSTI)

This paper presents the design fabrication experimental results and theoretical validation of a Love wave surface acoustic wave sensor for detecting the phase change from liquid water to solid ice. The sensing of this phase transition is due to the shear horizontal nature of Love waves which couple to a solid (ice) but not to a liquid (water). An SiO2 film of thickness 3.2 ?m deposited on an ST cut quartz wafer via plasma?enhanced chemical?vapor deposition acts as the guiding layer for Love waves. Testing is carried out with the water or ice placed directly in the propagation path of Love waves. An oscillation frequency shift of 2 MHz is observed when water on the sensor is frozen and melted cyclically. The contribution to the frequency shift is explained in terms of the acousto?electric effect (high permittivity and conductivity of water relative to ice) mass loading and elastic film formation (solid ice). An arrangement for wireless interrogation of the sensor is proposed which is particularly attractive for aircraft and rotorcraft applications obviating the need for complex wiring and local power sources. t

Vasundara V. Varadan; Sunil Gangadharan; Vijay K. Varadan

1999-01-01T23:59:59.000Z

25

Surface structures from low energy electron diffraction: Atoms, small molecules and an ordered ice film on metal surfaces  

SciTech Connect

We investigated the surface bonding of various adsorbates (0, S, C{sub 2}H{sub 3} and NO) along with the resulting relaxation of the Pt(111) surface using low energy electron diffiraction (LEED). LEED experiments have been performed on these ordered overlayers along with theoretical structural analysis using automated tensor LEED (ATLEED). The resulting surface structures of these ordered overlayers exhibit similar adsorbate-induced relaxations. In all cases the adsorbate occupies the fcc hollow site and induces an approximately 0.1 A buckling of the metal surface. The three metal atoms directly bonded to the adsorbate are ``pulled`` out of the surface and the metal atom that is not bound to the adsorbate is `pushed`` inward. In order to understand the reliability of such details, we have carried out a comprehensive study of various non-structural parameters used in a LEED computation. We also studied the adsorption of water on the Pt(lll) surface. We ordered an ultra thin ice film on this surface. The film`s surface is found to be the (0001) face of hexagonal ice. This surface is apparently terminated by a full-bilayer, in which the uppermost water molecules have large vibrational amplitudes even at temperatures as low as 90 K. We examined two other metal surfaces besides Pt(111): Ni(111) and Fe(lll). On Ni(111), we have studied the surface under a high coverage of NO. On both Ni(111) and Pt(111) NO molecules occupy the hollow sites and the N-0 bond distances are practically identical. The challenging sample preparation of an Fe(111) surface has been investigated and a successful procedure has been obtained. The small interlayer spacing found on Fe(111) required special treatment in the LEED calculations. A new ATLEED program has been developed to handle this surface.

Materer, N.F.

1995-09-01T23:59:59.000Z

26

Greenland ice sheet surface mass-balance variability: 19912003 Byrd Polar Research Center, The Ohio State University, 1090 Carmack Road, Columbus, OH 43210-1002, USA  

E-Print Network (OSTI)

Greenland ice sheet surface mass-balance variability: 1991­2003 J.E. BOX Byrd Polar Research Center. There is little evidence for a total ice-sheet surface mass-balance trend, although the meltwater runoff has a positive trend and, combined with iceberg discharge and basal melting estimates, suggests the ice sheet

Box, Jason E.

27

C. Tavakoli et al.: Dynamics and Modeling of AC Arc on Surface of Ice 1070-9878/06/$20.00 2006 IEEE  

E-Print Network (OSTI)

discharge activities leading to flashover on ice-covered insulator surface is presented. This model takes modeling, arc modeling, outdoor insulation, atmospheric icing. 1 INTRODUCTION OVERHEAD power lines icing deposited on insulators. The study and understanding of arc initiation and propagation

Paris-Sud XI, Université de

28

Impact of Solvent on Photocatalytic Mechanisms: Reactions of Photodesorption Products with Ice Overlayers on the TiO2(110) Surface  

SciTech Connect

The effects of water and methanol ice overlayers on the photodecomposition of acetone on rutile TiO2(110) were evaluated in ultrahigh vacuum (UHV) using photon stimulated desorption (PSD) and temperature programmed desorption (TPD). In the absence of ice overlayers, acetone photodecomposed on TiO2(110) at 95 K by ejection of a methyl radical into the gas phase and formation of acetate on the surface. With ice overlayers, the methyl radicals are trapped at the interface between TiO2(110) and the ice. When water ice was present, these trapped methyl radicals reacted either with each other to form ethane or with other molecules in the ice (e.g., water or displaced acetone) to form methane (CH4), ethane (CH3CH3) and other products (e.g., methanol), with all of these products trapped in the ice. The new products were free to revisit the surface or depart during desorption of the ice. When methanol ice was present, methane formation came about only from reaction of trapped methyl radicals with the methanol ice. Methane and ethane slowly leaked through methanol ice overlayers into vacuum at 95 K, but not through water ice overlayers. Different degrees of site competition between water and acetone, and between methanol and acetone led to different hydrogen abstraction pathways in the two ices. These results provide new insights into product formation routes and solution-phase radical formation mechanisms that are important in heterogeneous photocatalysis.

Shen, Mingmin; Henderson, Michael A.

2011-04-07T23:59:59.000Z

29

Assessing the Predictability of the Beaufort Sea Minimum Ice Extent in a Changing Arctic Climate Regime  

E-Print Network (OSTI)

Understanding the climatic drivers of changes in sea ice extent in the Arctic has become increasingly important as record minima in the September sea ice extent continue to be reached. This research therefore addresses the question of which synoptic...

Quirk, Laura Marie

2014-04-25T23:59:59.000Z

30

Structure of the Ice Nanocrystal Surface from Simulated versus Experimental Spectra of Adsorbed CF4  

Science Journals Connector (OSTI)

Infrared spectra of CF4 adsorbed on ice: Probing adsorbate dilution and phase separation with the ?3 transverse-longitudinal splitting ... IR spectra were detd. of CF4 adsorbed on nanocrystals of cubic ice at 83 K to a thickness ranging from submonolayer to multilayer with a max. ... For the multilayered adsorbate, the band of the CF4 antisym. ...

V. Buch; L. Delzeit; C. Blackledge; J. P. Devlin

1996-02-29T23:59:59.000Z

31

Greenland ice sheet surface mass-balance modeling in a 131-year perspective, 1950-2080  

SciTech Connect

Fluctuations in the Greenland Ice Sheet (GrIS) surface mass-balance (SMB) and freshwater influx to the surrounding oceans closely follow climate fluctuations and are of considerable importance to the global eustatic sea level rise. SnowModel, a state-of-the-art snow-evolution modeling system, was used to simulate variations in the GrIS melt extent, surface water balance components, changes in SMB, and freshwater influx to the ocean. The simulations are based on the IPCC scenario AlB modeled by the HIRHAM4 RCM (using boundary conditions from ECHAM5 AOGCM) from 1950 through 2080. In-situ meteorological station (GC-Net and WMO DMI) observations from inside and outside the GrIS were used to validate and correct RCM output data before it was used as input for SnowModel. Satellite observations and independent SMB studies were used to validate the SnowModel output and confirm the model's robustness. We simulated a {approx}90% increase in end-of-summer surface melt extent (0.483 x 10{sup 6} km{sup 2}) from 1950 to 2080, and a melt index (above 2,000-m elevation) increase of 138% (1.96 x 10{sup 6} km{sup 2} x days). The greatest difference in melt extent occured in the southern part of the GrIS, and the greatest changes in the number of melt days was seen in the eastern part of the GrIS ({approx}50-70%) and was lowest in the west ({approx}20-30%). The rate of SMB loss, largely tied to changes in ablation processes, lead to an enhanced average loss of 331 km{sup 3} from 1950 to 2080, an average 5MB level of -99 km{sup 3} for the period 2070-2080. GrIS surface freshwater runoff yielded an eustatic rise in sea level from 0.8 {+-} 0.1 (1950-1959) to 1.9 {+-} 0.1 mm (2070-2080) sea level equivalent (SLE) y{sup -1}. The accumulated GrIS freshwater runoff contribution from surface melting equaled 160 mm SLE from 1950 through 2080.

Mernild, Sebastian Haugard [Los Alamos National Laboratory; Liston, Glen [COLORADO STATE UNIV.; Hiemstra, Christopher [COLORADO STATE UNIV.; Christensen, Jens [DANISH METEOROLOGICAL INS.

2009-01-01T23:59:59.000Z

32

Application of a SeaWinds/QuikSCAT sea ice melt algorithm for assessing melt dynamics in the Canadian Arctic Archipelago  

E-Print Network (OSTI)

Application of a SeaWinds/QuikSCAT sea ice melt algorithm for assessing melt dynamics] A remotely sensed sea ice melt algorithm utilizing SeaWinds/QuikSCAT (QuikSCAT) data is developed and applied resolution radiometer Polar Pathfinder (APP-x) data set is used to identify spatially coupled relationships

33

The Effect of the Sea Ice Freshwater Flux on Southern Ocean Temperatures in CCSM3: Deep-Ocean Warming and Delayed Surface Warming  

Science Journals Connector (OSTI)

This study explores the role of sea ice freshwater and salt fluxes in modulating twenty-first-century surface warming in the Southern Ocean via analysis of sensitivity experiments in the Community Climate System Model, version 3 (CCSM3). In ...

Clark H. Kirkman IV; Cecilia M. Bitz

2011-05-01T23:59:59.000Z

34

An update on land-ice modeling in the CESM  

SciTech Connect

Mass loss from land ice, including the Greenland and Antarctic ice sheets as well as smaller glacier and ice caps, is making a large and growing contribution to global sea-level rise. Land ice is only beginning to be incorporated in climate models. The goal of the Land Ice Working Group (LIWG) is to develop improved land-ice models and incorporate them in CESM, in order to provide useful, physically-based sea-level predictions. LJWG efforts to date have led to the inclusion of a dynamic ice-sheet model (the Glimmer Community Ice Sheet Model, or Glimmer-CISM) in the Community Earth System Model (CESM), which was released in June 2010. CESM also includes a new surface-mass-balance scheme for ice sheets in the Community Land Model. Initial modeling efforts are focused on the Greenland ice sheet. Preliminary results are promising. In particular, the simulated surface mass balance for Greenland is in good agreement with observations and regional model results. The current model, however, has significant limitations: The land-ice coupling is one-way; we are using a serial version of Glimmer-CISM with the shallow-ice approximation; and there is no ice-ocean coupling. During the next year we plan to implement two-way coupling (including ice-ocean coupling with a dynamic Antarctic ice sheet) with a parallel , higher-order version of Glimmer-CISM. We will also add parameterizations of small glaciers and ice caps. With these model improvements, CESM will be able to simulate all the major contributors to 21st century global sea-level rise. Results of the first round of simulations should be available in time to be included in the Fifth Assessment Report (ARS) of the Intergovernmental Panel on Climate Change.

Lipscomb, William H [Los Alamos National Laboratory

2011-01-18T23:59:59.000Z

35

Bedmap2: improved ice bed, surface and thickness datasets for Antarctica  

E-Print Network (OSTI)

of the Potential Sea-Level Rise from a Col- lapse of theof floating ice and sea level rise, Geophys. Res. Lett. ,contribution to sea-level rise (58 m) are simi- lar to those

2013-01-01T23:59:59.000Z

36

Bedmap2: improved ice bed, surface and thickness datasets for Antarctica  

E-Print Network (OSTI)

and sub- ice-shelf bathymetry and gridded to produce oneice- free glaciated landscape of the Scottish Highlands, mosaiced with GEBCO Antarctic bathymetry to produceice in particular regions. The aim of the Bedmap2 project was to produce

2013-01-01T23:59:59.000Z

37

Surface Deformation from Satellite Data and Geothermal Assessment,  

Open Energy Info (EERE)

Surface Deformation from Satellite Data and Geothermal Assessment, Surface Deformation from Satellite Data and Geothermal Assessment, Exploration and Mitigation in Imperial Valley Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Surface Deformation from Satellite Data and Geothermal Assessment, Exploration and Mitigation in Imperial Valley Author Mariana Eneva Published N/A, 2012 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Surface Deformation from Satellite Data and Geothermal Assessment, Exploration and Mitigation in Imperial Valley Citation Mariana Eneva. Surface Deformation from Satellite Data and Geothermal Assessment, Exploration and Mitigation in Imperial Valley [Internet]. 2012. N/A. N/A. [cited 2013/09/17]. Available from: http://www.energy.ca.gov/research/notices/2012-02-29_workshop/presentations/Geothermal/Eneva-Imageair_Inc_Presentation.pdf

38

Assessment of sea-ice albedo radiative forcing and feedback over the Northern Hemisphere from 1982 to 2009 using satellite and reanalysis data  

Science Journals Connector (OSTI)

The decreasing surface albedo caused by continously retreating sea ice over Arctic plays a critical role in Arctic warming amplification. However, the quantification of the change in radiative forcing at top of atmosphere (TOA) introduced by the ...

Yunfeng Cao; Shunlin Liang; Xiaona Chen; Tao He

39

Mobile Ice Nucleus Spectrometer  

SciTech Connect

This first year report presents results from a computational fluid dynamics (CFD) study to assess the flow and temperature profiles within the mobile ice nucleus spectrometer.

Kulkarni, Gourihar R.; Kok, G. L.

2012-05-07T23:59:59.000Z

40

Surface Water Monitoring and Assessment (Ohio) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Surface Water Monitoring and Assessment (Ohio) Surface Water Monitoring and Assessment (Ohio) Surface Water Monitoring and Assessment (Ohio) < Back Eligibility Utility Agricultural Investor-Owned Utility State/Provincial Govt Industrial Municipal/Public Utility Local Government Tribal Government Low-Income Residential Multi-Family Residential Systems Integrator Transportation Savings Category Water Buying & Making Electricity Home Weatherization Program Info State Ohio Program Type Environmental Regulations Provider Ohio Environmental Protection Agency This law establishes criteria for three levels of credible data for a surface water quality monitoring and assessment program and establishes the necessary training and experience for persons to submit credible data, thereby increasing the information base upon which to enhance, improve and

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Basal Drainage System Response to Increasing Surface Melt on the Greenland Ice Sheet  

Science Journals Connector (OSTI)

...2010-2011 (NASA DAAC at the National Snow and Ice Data Center, Boulder, CO, 2010). 30 Murray T. Clarke G. K. C. , Black-box modeling...002214309790152375 41 Clarke G. K. C. , Hydraulics of subglacial outburst floods: New insights from the Spring-Hutter formulation . J. Glaciol...

T. Meierbachtol; J. Harper; N. Humphrey

2013-08-16T23:59:59.000Z

42

Determination of Large-Scale Cloud Ice Water Concentration by Combining Surface Radar and Satellite Data in Support of ARM SCM Activities  

SciTech Connect

Single-column modeling (SCM) is one of the key elements of Atmospheric Radiation Measurement (ARM) research initiatives for the development and testing of various physical parameterizations to be used in general circulation models (GCMs). The data required for use with an SCM include observed vertical profiles of temperature, water vapor, and condensed water, as well as the large-scale vertical motion and tendencies of temperature, water vapor, and condensed water due to horizontal advection. Surface-based measurements operated at ARM sites and upper-air sounding networks supply most of the required variables for model inputs, but do not provide the horizontal advection term of condensed water. Since surface cloud radar and microwave radiometer observations at ARM sites are single-point measurements, they can provide the amount of condensed water at the location of observation sites, but not a horizontal distribution of condensed water contents. Consequently, observational data for the large-scale advection tendencies of condensed water have not been available to the ARM cloud modeling community based on surface observations alone. This lack of advection data of water condensate could cause large uncertainties in SCM simulations. Additionally, to evaluate GCMsâ?? cloud physical parameterization, we need to compare GCM results with observed cloud water amounts over a scale that is large enough to be comparable to what a GCM grid represents. To this end, the point-measurements at ARM surface sites are again not adequate. Therefore, cloud water observations over a large area are needed. The main goal of this project is to retrieve ice water contents over an area of 10 x 10 deg. surrounding the ARM sites by combining surface and satellite observations. Built on the progress made during previous ARM research, we have conducted the retrievals of 3-dimensional ice water content by combining surface radar/radiometer and satellite measurements, and have produced 3-D cloud ice water contents in support of cloud modeling activities. The approach of the study is to expand a (surface) point measurement to an (satellite) area measurement. That is, the study takes the advantage of the high quality cloud measurements (particularly cloud radar and microwave radiometer measurements) at the point of the ARM sites. We use the cloud ice water characteristics derived from the point measurement to guide/constrain a satellite retrieval algorithm, then use the satellite algorithm to derive the 3-D cloud ice water distributions within an 10?° (latitude) x 10?° (longitude) area. During the research period, we have developed, validated and improved our cloud ice water retrievals, and have produced and archived at ARM website as a PI-product of the 3-D cloud ice water contents using combined satellite high-frequency microwave and surface radar observations for SGP March 2000 IOP and TWP-ICE 2006 IOP over 10 deg. x 10 deg. area centered at ARM SGP central facility and Darwin sites. We have also worked on validation of the 3-D ice water product by CloudSat data, synergy with visible/infrared cloud ice water retrievals for better results at low ice water conditions, and created a long-term (several years) of ice water climatology in 10 x 10 deg. area of ARM SGP and TWP sites and then compared it with GCMs.

Liu, Guosheng

2013-03-15T23:59:59.000Z

43

Ice age paleotopography  

SciTech Connect

A gravitationally self-consistent theory of postglacial relative sea level change is used to infer the variation of surface ice and water cover since the Last Glacial Maximum (LGM). The results show that LGM ice volume was approximately 35 percent lower than suggested by the CLIMAP reconstruction and the maximum heights of the main Laurentian and Fennoscandian ice complexes are inferred to have been commensurately lower with respect to sea level. Use of these Ice Age boundary conditions in atmospheric general circulation models will yield climates that differ significantly from those previously inferred on the basis of the CLIMAP data set.

Peltier, W.R. (Univ. of Toronto, Ontario (Canada))

1994-07-08T23:59:59.000Z

44

Triazine herbcides: Ecological risk assessment in North American surface waters  

SciTech Connect

The triazine herbicides are some of the most widely used pesticides in North America. Some are found in surface waters in North America and risks to aquatic ecosystems are a possible concern. This paper presents the results of a comprehensive aquatic ecological risk assessment conducted using probabilistic risk assessment techniques. The assessment of exposure data concentrated on Midwestern us watersheds, the area of greatest triazine use in North America and showed that concentrations of some triazines rarely exceeded 20 {mu}g/L in rivers, streams, and reservoirs. The effects assessment showed that phytoplankton were the most sensitive organisms to triazines followed, in decreasing order of sensitivity, by macrophytes, benthic invertebrates, zooplankton and fish. Distribution analysis of sensitivity to atrazine showed 10th percentile of 37 {mu}g/L for LC50s in all organisms and 5.4 {mu}g/L for LC50s in algae and plants. Simazine showed 10th percentiles of 188 {mu}g/L for LC50s in all organisms and 27 {mu}g/L for LC50s in aquatic plants. Comparisons of the exposure and effects distributions showed low probabilities of exceeding the 10th percentiles of the sensitivity distributions. These results will be discussed in relation to the mechanism of action of these substances and other stressors in the environment.

Solomon, K.R. [Univ. of Guelph (Canada)

1996-10-01T23:59:59.000Z

45

Ice deformation near SHEBA R. W. Lindsay  

E-Print Network (OSTI)

in the vicinity of the Surface Heat Budget of the Arctic Ocean (SHEBA) ice camp that is suitable for forcing factor for regional heat fluxes, ice growth and melt rates, and ice strength [Maykut, 1982Ice deformation near SHEBA R. W. Lindsay Polar Science Center, University of Washington, Seattle

Lindsay, Ron

46

A New Model to Construct Ice Stream Surface Elevation Profiles and Calculate Contributions to Sea-Level Rise  

E-Print Network (OSTI)

to 21st-Century Sea-Level Rise. Science, 321, 1340; DOI:in the Face of Sea-Level Rise: A Hybrid Modeling Approachof ice sheets to sea-level rise. Bibliography Alcamo, J. et

Adachi, Yosuke

2012-01-01T23:59:59.000Z

47

Hydrohalite in cold sea ice: Laboratory observations of single crystals, surface accumulations, and migration rates under a temperature  

E-Print Network (OSTI)

April 2009; published 17 July 2009. [1] When NaCl precipitates out of a saturated solution, it forms it instead precipitates as the dihydrate ``hydrohalite,'' NaCl Á 2H2O. When sea ice is cooled, hydrohalite begins to precipitate within brine inclusions at about ?23°C. In this work, hydrohalite crystals

Warren, Stephen

48

Economic assessment of the thin polymer icemaker  

SciTech Connect

We have constructed and tested a small device to produce ice in ice/water mixtures using a cold fluid as the heat sink. The device is a flexible heat exchanger constructed from a thin film of a suitable polymer. When filled with circulating liquid coolant the heat exchanger consists of an inflated series of parallel tubes; Ice forms on the outside in complementary half cylinders. When the circulation in cut off, gravity drains the coolant and the static head of the water bath crushes the tubes, freeing them from the ice which floats to the surface. We here report an economic assessment of this device. In its present form, we find it competitive with existing commercial ice making systems. The analysis also points out two areas where further technical progress could lead to a significant economic advantage for the polymer film ice maker.

Leigh, R.W. [Pratt Inst., Brooklyn, NY (United States)

1992-07-01T23:59:59.000Z

49

A model of the threedimensional evolution of Arctic melt ponds on firstyear and multiyear sea ice  

E-Print Network (OSTI)

ice. In the summer the upper layers of sea ice and snow melts producing meltwater that accumulatesA model of the threedimensional evolution of Arctic melt ponds on firstyear and multiyear sea ice F in Arctic melt ponds on the surface of sea ice. An accurate estimate of the fraction of the sea ice surface

Feltham, Daniel

50

Viscosity of interfacial water regulates ice nucleation  

SciTech Connect

Ice formation on solid surfaces is an important phenomenon in many fields, such as cloud formation and atmospheric icing, and a key factor for applications in preventing freezing. Here, we report temperature-dependent nucleation rates of ice for hydrophilic and hydrophobic surfaces. The results show that hydrophilic surface presents a lower ice nucleation rate. We develop a strategy to extract the thermodynamic parameters, J{sub 0} and ?, in the context of classical nucleation theory. From the extracted J{sub 0} and ?, we reveal the dominant role played by interfacial water. The results provide an insight into freezing mechanism on solid surfaces.

Li, Kaiyong; Chen, Jing; Zhang, Qiaolan; Zhang, Yifan [Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China) [Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); University of Chinese Academy of Sciences, Beijing 100049 (China); Xu, Shun; Zhou, Xin [School of Physics, University of Chinese Academy of Sciences, Beijing 100049 (China)] [School of Physics, University of Chinese Academy of Sciences, Beijing 100049 (China); Cui, Dapeng; Wang, Jianjun, E-mail: wangj220@iccas.ac.cn; Song, Yanlin [Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)] [Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)

2014-03-10T23:59:59.000Z

51

ARM - Measurement - Cloud ice particle  

NLE Websites -- All DOE Office Websites (Extended Search)

ice particle ice particle ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Cloud ice particle Particles made of ice found in clouds. Categories Cloud Properties Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments MET : Surface Meteorological Instrumentation Field Campaign Instruments REPLICATOR : Balloon-borne Ice Crystal Replicator CPI : Cloud Particle Imager CVI-AIR : Counterflow Virtual Impactor LEARJET : Lear Jet PARTIMG : Particle imager UAV-PROTEUS-MICRO : Proteus Cloud Microphysics Instruments

52

Gas Migration from Closed Coal Mines to the Surface RISK ASSESSMENT METHODOLOGY AND PREVENTION MEANS  

E-Print Network (OSTI)

Gas Migration from Closed Coal Mines to the Surface RISK ASSESSMENT METHODOLOGY AND PREVENTION to the surface is especially significant in the context of coal mines. This is because mine gas can migrate of the scheduled closure of all coal mining operations in France, INERIS has drawn up, at the request of national

Paris-Sud XI, Université de

53

Ice Fishing  

NLE Websites -- All DOE Office Websites (Extended Search)

Ice Fishing Ice Fishing Nature Bulletin No. 327-A January 11, 1969 Forest Preserve District of Cook County Richard B. Ogilvie, President Roland F. Eisenbeis, Supt. of Conservation ICE FISHING We have a peculiar class of people known as the "Frosty-toed Tribe". As soon as winter comes and the ice permits, they put on all the clothes they own and what they can borrow, pack their automobiles with equipment, and start early in the morning for some inland body of water or a bay along one of the Great Lakes. Usually, two or three go together and they may drive 50 or 100 miles. For hours, even in below zero weather, they huddle around holes cut in the ice, fishing patiently, sustained by hope, hot coffee, and a lot of conversation. Some days a man may catch nothing. Other days he may bring home all the law allows. Sometimes he fishes vainly until almost sundown and then begins to haul them in, all of the same kind and size, as fast as he can re-bait his hook. In the meantime, other anglers have rushed over, cut holes, and are fishing all around him -- usually in vain, because one of the strange things about ice fishing is that, although you may catch fish out of one hole, you may get nothing out of another only a few feet from it, using the same kind of bait at the same depth. There are a lot of hotly contested theories but nobody knows why. After watching and questioning scores of ice fishermen, some of them noted for their prowess, we find that although each has his own secret techniques and favorite spots, good catches seem more a matter of luck than skill. Although they are sluggish and don't fight, fish caught in winter have the firmest flesh and finest flavor. The biggest thrill comes from the skillet.

54

Intensive Sea Surface Microlayer Investigations of Open Leads in the Pack Ice during Arctic Ocean 2001 Expedition  

Science Journals Connector (OSTI)

3-7 Studies of microlayer properties have been conducted on freshwater lakes, seas, and temperate open oceans. ... The wind factor (Pw) discussed is an approximate measure of the wind power during sampling collection, calculated as Pw = 1/2ld(U)3, where l is the estimated fetch distance (m), d is air density (approximated from air pressure in hPa), and U the average wind speed (m s-1) measured at Z = 36 m. ... Williams et al.12 reported reduction of oceanic surface tension in a comprehensive study of surface characteristics in the Pacific Ocean off the coast of California. ...

Johan C. Knulst; Dena Rosenberger; Brian Thompson; Jussi Paatero

2003-11-01T23:59:59.000Z

55

Image Content Engine (ICE)  

SciTech Connect

The Image Content Engine (ICE) is being developed to provide cueing assistance to human image analysts faced with increasingly large and intractable amounts of image data. The ICE architecture includes user configurable feature extraction pipelines which produce intermediate feature vector and match surface files which can then be accessed by interactive relational queries. Application of the feature extraction algorithms to large collections of images may be extremely time consuming and is launched as a batch job on a Linux cluster. The query interface accesses only the intermediate files and returns candidate hits nearly instantaneously. Queries may be posed for individual objects or collections. The query interface prompts the user for feedback, and applies relevance feedback algorithms to revise the feature vector weighting and focus on relevant search results. Examples of feature extraction and both model-based and search-by-example queries are presented.

Brase, J M

2007-03-26T23:59:59.000Z

56

Assessment of architectural options for surface power generation and energy storage on human Mars missions  

E-Print Network (OSTI)

of the Martian day). Given the significant policy and sustainability advantages of solar power compared-film photovoltaic arrays and energy storage technologies that is anticipated over the coming decades, solar powerAssessment of architectural options for surface power generation and energy storage on human Mars

de Weck, Olivier L.

57

Medical ice slurry production device  

DOE Patents (OSTI)

The present invention relates to an apparatus for producing sterile ice slurries for medical cooling applications. The apparatus is capable of producing highly loaded slurries suitable for delivery to targeted internal organs of a patient, such as the brain, heart, lungs, stomach, kidneys, pancreas, and others, through medical size diameter tubing. The ice slurry production apparatus includes a slurry production reservoir adapted to contain a volume of a saline solution. A flexible membrane crystallization surface is provided within the slurry production reservoir. The crystallization surface is chilled to a temperature below a freezing point of the saline solution within the reservoir such that ice particles form on the crystallization surface. A deflector in the form of a reciprocating member is provided for periodically distorting the crystallization surface and dislodging the ice particles which form on the crystallization surface. Using reservoir mixing the slurry is conditioned for easy pumping directly out of the production reservoir via medical tubing or delivery through other means such as squeeze bottles, squeeze bags, hypodermic syringes, manual hand delivery, and the like.

Kasza, Kenneth E. (Palos Park, IL); Oras, John (Des Plaines, IL); Son, HyunJin (Naperville, IL)

2008-06-24T23:59:59.000Z

58

A Reconciled Estimate of Ice-Sheet Mass Balance  

Science Journals Connector (OSTI)

...Reassessment of net surface mass balance in Antarctica...high-resolution surface mass balance map of Antarctica (1979-2010...from ice-sheet-wide velocity mapping . J. Glaciol...J. ., Higher surface mass balance of the Greenland...

Andrew Shepherd; Erik R. Ivins; Geruo A; Valentina R. Barletta; Mike J. Bentley; Srinivas Bettadpur; Kate H. Briggs; David H. Bromwich; Ren Forsberg; Natalia Galin; Martin Horwath; Stan Jacobs; Ian Joughin; Matt A. King; Jan T. M. Lenaerts; Jilu Li; Stefan R. M. Ligtenberg; Adrian Luckman; Scott B. Luthcke; Malcolm McMillan; Rakia Meister; Glenn Milne; Jeremie Mouginot; Alan Muir; Julien P. Nicolas; John Paden; Antony J. Payne; Hamish Pritchard; Eric Rignot; Helmut Rott; Louise Sandberg Srensen; Ted A. Scambos; Bernd Scheuchl; Ernst J. O. Schrama; Ben Smith; Aud V. Sundal; Jan H. van Angelen; Willem J. van de Berg; Michiel R. van den Broeke; David G. Vaughan; Isabella Velicogna; John Wahr; Pippa L. Whitehouse; Duncan J. Wingham; Donghui Yi; Duncan Young; H. Jay Zwally

2012-11-30T23:59:59.000Z

59

Photoadaptation of high Arctic ice algae  

Science Journals Connector (OSTI)

... of the surface snow cover allowed considerable control over the light conditions of the epontic algae. Algal material was collected from the bottom few centimetres of ice with a SIPRE ... growth in their respective light environments.

Glenn F. Cota

1985-05-16T23:59:59.000Z

60

Physical Stability of Long-Term Surface Barriers-Assessment of Potentially Disruptive Natural Events  

NLE Websites -- All DOE Office Websites (Extended Search)

] ] a -" m HI BHI-00145 Rev. 00 Physical Stability of Long-Term Surface Barriers - Assessment of Potentially Disruptive Natural Events Authors N. R. Wing IT Hanford, Inc. F. M. Corpuz Bechtel Hanford, Inc. K. L. Petersen Pacific Northwest Laboratoy A. M. Tallman Westinghouse Hanford Company Date Published May 1995 HANFORD Prepared for the U.S. Department of Energy Office of Environmental Restoration and Waste Management Bechtel Hanford, Inc. Flichland, Washington Approved for Public Release . b q q BHI-00145 ma) Ou: NIA TSD: NIA ERA: NIA APPROVAL PAGE Title of Dccumw PHYSICAL STABILITY OF LONG-TERM SURFACE BARRIERS - ASSESSMENT OF POTE.INTI.ALLYDISRUPTIVE NATURAL Author(s): N. R. Wq, lT ~Otd, Inc. K. L. PetmerL hCi.fiC Northwest Labmtory F. M. Corpuz, Bechkl Hanford, Inc. A. M. Tai.lmaq W-owe HEUlfOd Corqnny Approvai: J. G. Zoghbi, Acting Manager, Technology Demonstration

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61

Assessment of Heliosat-4 surface solar irradiance derived on the basis of SEVIRI-APOLLO cloud products  

E-Print Network (OSTI)

surface downwelling solar irradiance (SSI). This method is composed by two parts: a clear-sky moduleAssessment of Heliosat-4 surface solar irradiance derived on the basis of SEVIRI-APOLLO cloud Aerospace Center (DLR), aims at estimating surface downwelling solar irradiance (SSI). It benefits from

Boyer, Edmond

62

Mars gets new icing  

Science Journals Connector (OSTI)

... north pole. Here the ice-cap shrinks each summer as a veneer of carbon dioxide burns off, revealing plenty of less volatile water ice beneath. The ice-cap at the ... beneath. The ice-cap at the red planet's south pole is covered with strange pits, called Swiss-cheese features. They have flat bottoms and steep sides; some are ...

Philip Ball

2003-02-14T23:59:59.000Z

63

Arctic ice islands  

SciTech Connect

The development of offshore oil and gas resources in the Arctic waters of Alaska requires offshore structures which successfully resist the lateral forces due to moving, drifting ice. Ice islands are floating, a tabular icebergs, up to 60 meters thick, of solid ice throughout their thickness. The ice islands are thus regarded as the strongest ice features in the Arctic; fixed offshore structures which can directly withstand the impact of ice islands are possible but in some locations may be so expensive as to make oilfield development uneconomic. The resolution of the ice island problem requires two research steps: (1) calculation of the probability of interaction between an ice island and an offshore structure in a given region; and (2) if the probability if sufficiently large, then the study of possible interactions between ice island and structure, to discover mitigative measures to deal with the moving ice island. The ice island research conducted during the 1983-1988 interval, which is summarized in this report, was concerned with the first step. Monte Carlo simulations of ice island generation and movement suggest that ice island lifetimes range from 0 to 70 years, and that 85% of the lifetimes are less then 35 years. The simulation shows a mean value of 18 ice islands present at any time in the Arctic Ocean, with a 90% probability of less than 30 ice islands. At this time, approximately 34 ice islands are known, from observations, to exist in the Arctic Ocean, not including the 10-meter thick class of ice islands. Return interval plots from the simulation show that coastal zones of the Beaufort and Chukchi Seas, already leased for oil development, have ice island recurrences of 10 to 100 years. This implies that the ice island hazard must be considered thoroughly, and appropriate safety measures adopted, when offshore oil production plans are formulated for the Alaskan Arctic offshore. 132 refs., 161 figs., 17 tabs.

Sackinger, W.M.; Jeffries, M.O.; Lu, M.C.; Li, F.C.

1988-01-01T23:59:59.000Z

64

ELECTRON IRRADIATION OF KUIPER BELT SURFACE ICES: TERNARY N{sub 2}-CH{sub 4}-CO MIXTURES AS A CASE STUDY  

SciTech Connect

The space weathering of icy Kuiper Belt Objects was investigated in this case study by exposing methane (CH{sub 4}) and carbon monoxide (CO) doped nitrogen (N{sub 2}) ices at 10 K to ionizing radiation in the form of energetic electrons. Online and in situ Fourier transform infrared spectroscopy was utilized to monitor the radiation-induced chemical processing of these ices. Along with isocyanic acid (HNCO), the products could be mainly derived from those formed in irradiated binary ices of the N{sub 2}-CH{sub 4} and CO-CH{sub 4} systems: nitrogen-bearing products were found in the form of hydrogen cyanide (HCN), hydrogen isocyanide (HNC), diazomethane (CH{sub 2}N{sub 2}), and its radical fragment (HCN{sub 2}); oxygen-bearing products were of acetaldehyde (CH{sub 3}CHO), formyl radical (HCO), and formaldehyde (H{sub 2}CO). As in the pure ices, the methyl radical (CH{sub 3}) and ethane (C{sub 2}H{sub 6}) were also detected, as were carbon dioxide (CO{sub 2}) and the azide radical (N{sub 3}). Based on the temporal evolution of the newly formed products, kinetic reaction schemes were then developed to fit the temporal profiles of the newly formed species, resulting in numerical sets of rate constants. The current study highlights important constraints on the preferential formation of isocyanic acid (HNCO) over hydrogen cyanide (HCN) and hydrogen isocyanide (HNC), thus guiding the astrobiological and chemical evolution of those distant bodies.

Kim, Y. S.; Kaiser, R. I., E-mail: ralfk@hawaii.edu [Department of Chemistry, University of Hawaii at Manoa, Honolulu, HI 96822 (United States)

2012-10-10T23:59:59.000Z

65

Use of OCA and APOLLO in Heliosat-4 method for the assessment of surface downwelling solar irradiance  

E-Print Network (OSTI)

-based assessments of surface downwelling solar irradiance (SSI) are more and more used in the domain of solar energy studies will be performed in order to better understand the advantage and disadvantage of each product, diffuse and direct surface irradiance for use in various domains: solar energy, biomass, agriculture

Paris-Sud XI, Université de

66

Assessing the cleanliness of surfaces: Innovative molecular approaches vs. standard spore assays  

SciTech Connect

A bacterial spore assay and a molecular DNA microarray method were compared for their ability to assess relative cleanliness in the context of bacterial abundance and diversity on spacecraft surfaces. Colony counts derived from the NASA standard spore assay were extremely low for spacecraft surfaces. However, the PhyloChip generation 3 (G3) DNA microarray resolved the genetic signatures of a highly diverse suite of microorganisms in the very same sample set. Samples completely devoid of cultivable spores were shown to harbor the DNA of more than 100 distinct microbial phylotypes. Furthermore, samples with higher numbers of cultivable spores did not necessarily give rise to a greater microbial diversity upon analysis with the DNA microarray. The findings of this study clearly demonstrated that there is not a statistically significant correlation between the cultivable spore counts obtained from a sample and the degree of bacterial diversity present. Based on these results, it can be stated that validated state-of-the-art molecular techniques, such as DNA microarrays, can be utilized in parallel with classical culture-based methods to further describe the cleanliness of spacecraft surfaces.

Cooper, M.; Duc, M.T. La; Probst, A.; Vaishampayan, P.; Stam, C.; Benardini, J.N.; Piceno, Y.M.; Andersen, G.L.; Venkateswaran, K.

2011-04-01T23:59:59.000Z

67

Ising model for melt ponds on Arctic sea ice  

E-Print Network (OSTI)

The albedo of melting Arctic sea ice, a key parameter in climate modeling, is determined by pools of water on the ice surface. Recent observations show an onset of pond complexity at a critical area of about 100 square meters, attended by a transition in pond fractal dimension. To explain this behavior and provide a statistical physics approach to sea ice modeling, we introduce a two dimensional Ising model for pond evolution which incorporates ice-albedo feedback and the underlying thermodynamics. The binary magnetic spin variables in the Ising model correspond to the presence of melt water or ice on the sea ice surface. The model exhibits a second-order phase transition from isolated to clustered melt ponds, with the evolution of pond complexity in the clustered phase consistent with the observations.

Ma, Y -P; Golden, K M

2014-01-01T23:59:59.000Z

68

Assessment of damage to the desert surfaces of Kuwait due to the Gulf War  

SciTech Connect

This is a preliminary report on a joint research project by Boston University and the Kuwait Institute for Scientific Research that commenced in April 1992. The project aim is to establish the extent and nature of environmental damage to the desert surface and coastal zone of Kuwait due to the Gulf War and its aftermath. Change detection image enhancement techniques were employed to enhance environmental change by comparison of Landsat Thematic Mapper images obtained before the wars and after the cessation of the oil and well fires. Higher resolution SPOT images were also utilized to evaluate the nature of the environmental damage to specific areas. The most prominent changes were due to: (1) the deposition of oil and course-grained soot on the desert surface as a result of oil rain'' from the plume that emanated from the oil well fires; (2) the formation of hundreds of oil lakes, from oil seepage at the damaged oil well heads; (3) the mobilization of sand and dust and (4) the pollution of segments of the coastal zone by the deposition of oil from several oil spills. Interpretation of satellite image data are checked in the field to confirm the observations, and to assess the nature of the damage. Final results will be utilized in establishing the needs for remedial action to counteract the harmful effects of the various types of damage to the environment of Kuwait.

El-Baz, F. (Boston Univ., MA (United States). Center for Remote Sensing); Al-Ajmi, D. (Kuwait Inst. for Scientific Research (Kuwait). Environmental and Earth Sciences Div.)

1993-01-01T23:59:59.000Z

69

Surface water drainage system. Environmental assessment and finding of no significant impact  

SciTech Connect

This Environmental Assessment (EA) is written pursuant to the National Environmental Policy Act (NEPA). The document identifies and evaluates the action proposed to correct deficiencies in, and then to maintain, the surface water drainage system serving the Department of Energy`s Rocky Flats Environmental Technology Site (Site), located north of Golden, Colorado. Many of the activities proposed would not normally be subject to this level of NEPA documentation. However, in many cases, maintenance of the system has been deferred to the point that wetlands vegetation has become established in some ditches and culverts, creating wetlands. The proposed activities would damage or remove some of these wetlands in order to return the drainage system to the point that it would be able to fully serve its intended function - stormwater control. The Department of Energy (DOE) regulations require that activities affecting environmentally sensitive areas like wetlands be the subject of an EA. Most portions of the surface water drainage system are presently inadequate to convey the runoff from a 100-year storm event. As a result, such an event would cause flooding across much of the Site and possibly threaten the integrity of the dams at the terminal ponds. Severe flooding would not only cause damage to facilities and equipment, but could also facilitate the transport of contaminants from individual hazardous substance sites (IHSSs). Uncontrolled flow through the A- and B-series ponds could cause contaminated sediments to become suspended and carried downstream. Additionally, high velocity flood flows significantly increase erosion losses.

NONE

1996-05-01T23:59:59.000Z

70

Test Plan to Assess Fire Effects on the Function of an Engineered Surface Barrier  

SciTech Connect

Wildfire is a frequent perturbation in shrub steppe ecosystems, altering the flora, fauna, atmosphere, and soil of these systems. Research on the fire effects has focused mostly on natural ecosystems with essentially no attention on engineered systems like surface barriers. The scope of the project is to use a simulated wildfire to induce changes in an engineered surface barrier and document the effects on barrier performance. The main objective is to quantify the effects of burning and the resulting post-fire conditions on alterations in soil physical properties; hydrologic response, particularly the water balance; geochemical properties; and biological properties. A secondary objective is to use the lessons learned to maximize fire protection in the design of long-term monitoring systems based on electronic sensors. A simulated wildfire will be initiated, controlled and monitored at the 200-BP-1 barrier in collaboration with the Hanford Fire Department during the fall of 2008. The north half of the barrier will be divided into nine 12 x 12 m plots, each of which will be randomly assigned a fuel load of 2 kg m-2 or 4 kg m-2. Each plot will be ignited around the perimeter and flames allowed to carry to the centre. Any remaining unburned vegetation will be manually burned off using a drip torch. Progress of the fire and its effects will be monitored using point measurements of thermal, hydrologic, and biotic variables. Three measures of fire intensity will be used to characterize fire behavior: (1) flame height, (2) the maximum temperature at three vertical profile levels, and (3) total duration of elevated temperature at these levels. Pre-burn plant information, including species diversity, plant height, and canopy diameter will be measured on shrubs from the plots to be burned and from control plots at the McGee ranch. General assessments of shrub survival, recovery, and recruitment will be made after the fire. Near-surface soil samples will be collected pre- and post-burn to determine changes in the gravel content of the surface layer so as to quantify inflationary or deflationary responses to fire and to reveal the ability of the surface to resist post-fire erosive stresses. Measures of bulk density, water repellency, water retention, and hydraulic conductivity will be used to characterize changes in infiltration rates and water storage capacity following the fire. Samples will also be analyzed to quantify geochemical changes including changes in soil pH, cation exchange capacity, specific surface area, and the concentration of macro nutrients (e.g. N, P, K) and other elements such as Na, Mg, Ca, that are critical to the post-fire recovery revegetation. Soil CO2 emissions will be measured monthly for one year following the burn to document post-fire stimulation of carbon turnover and soil biogenic emissions. Surface and subsurface temperature measurements at and near monitoring installations will be used to document fire effects on electronic equipment. The results of this study will be used to bridge the gaps in knowledge on the effects of fire on engineered ecosystems (e.g. surface barriers), particularly the hydrologic and biotic characteristics that govern the water and energy balance. These results will also support the development of practical fire management techniques for barriers that are compatible with wildfire suppression strategies. Furthermore, lessons learned will be use to develop installation strategies needed to protect electronic monitoring equipment from the intense heat of fire and the potential damaging effects of smoke and fire extinguishing agents. Such information is needed to better understand long-term barrier performance under extreme conditions, especially if site maintenance and operational funding is lost for activities such as barrier revegetation.

Ward, Anderson L.; Berlin, Gregory T.; Cammann, Jerry W.; Leary, Kevin D.; Link, Steven O.

2008-09-29T23:59:59.000Z

71

Ultrafast photochemistry of methyl hydroperoxide on ice particles  

E-Print Network (OSTI)

Ultrafast photochemistry of methyl hydroperoxide on ice particles M. A. Kambouresa , S. AOOH, on water clusters produces a surprisingly wide range of products on a subpicosecond time scale | photodissociation Photoinduced processes at surfaces of water or ice are of interest in atmospheric chemistry

Nizkorodov, Sergey

72

Surface deacidification of ZSM5 by SiCl4 treatment: Assessment of surface specificity by methylene blue adsorption  

Science Journals Connector (OSTI)

A study has been made of ZSM5 zeolite deacidification (dealumination) by high temperature treatment in SiCl4 vapour, monitoring total acidity by Na+-exchange, and external surface acidity by methylene blue adsorp...

J. R. Anderson; Y. -F. Chang; A. E. Hughes

1989-01-01T23:59:59.000Z

73

Intertemporal Computable Equilibrium System (ICES) | Open Energy  

Open Energy Info (EERE)

Intertemporal Computable Equilibrium System (ICES) Intertemporal Computable Equilibrium System (ICES) Jump to: navigation, search Tool Summary Name: Intertemporal Computable Equilibrium System (ICES) Agency/Company /Organization: Fondazione Eni Enrico Mattei Sector: Climate, Energy Complexity/Ease of Use: Moderate Website: www.feem.it/getpage.aspx?id=138&sez=Research&padre=18&sub=75&idsub=102 Related Tools Ex Ante Appraisal Carbon-Balance Tool (EX-ACT) General Equilibrium Model for Economy - Energy - Environment (GEM-E3) DNE21+ ... further results Find Another Tool FIND DEVELOPMENT IMPACTS ASSESSMENT TOOLS A recursive dynamic general equilibrium model developed with the main but not exclusive purpose of assessing the final welfare implication of climate change impacts on world economies. In addition to climate-change impact

74

Observations of an Impurity-driven Hysteresis Behavior in Ice Crystal Growth at Low Pressure  

E-Print Network (OSTI)

mechanisms for this instability, which can be used to produce clean, faceted ice surfaces. 1 IntroductionObservations of an Impurity-driven Hysteresis Behavior in Ice Crystal Growth at Low Pressure Abstract. We describe observations of a novel hysteresis behavior in the growth of ice crystals under near

Libbrecht, Kenneth G.

75

Streamline Regularization for Large Discontinuous Motion of Sea Ice , C. A. Geiger1  

E-Print Network (OSTI)

Streamline Regularization for Large Discontinuous Motion of Sea Ice M. Thomas1 , C. A. Geiger1 , P the sea ice on the po- lar ocean surfaces serve as thermal regulators for the planet. The variable thickness and dynamic nature of the sea ice is intimately connected with the thermal reg- ulation

Geiger, Cathleen

76

SPIRIT-IPY: List of Publications SPOT 5 stereoscopic survey of Polar Ice: Reference Images &  

E-Print Network (OSTI)

, A. and Gallee, H.: Modeling the mass and surface heat budgets in a coastal blue ice area of AdelieSPIRIT-IPY: List of Publications SPOT 5 stereoscopic survey of Polar Ice: Reference Images stereoscopic survey of Polar Ice: Reference Images and Topographies during the fourth International Polar Year

Berthier, Etienne

77

Can North Atlantic Sea Ice Anomalies Account for DansgaardOeschger Climate Signals?*  

E-Print Network (OSTI)

. The presence of sea ice lowers surface temperature by insulating the atmosphere from the ocean heat reservoirCan North Atlantic Sea Ice Anomalies Account for Dansgaard­Oeschger Climate Signals?* CAMILLE LI 2010) ABSTRACT North Atlantic sea ice anomalies are thought to play an important role in the abrupt

Battisti, David

78

A continuum model of melt pond evolution on Arctic sea ice Daniela Flocco1  

E-Print Network (OSTI)

the atmosphere and ocean. In particular, sea ice affects the polar climate by insulating the ocean fromA continuum model of melt pond evolution on Arctic sea ice Daniela Flocco1 and Daniel L. Feltham1 the Northern Hemisphere summer, absorbed solar radiation melts snow and the upper surface of Arctic sea ice

Feltham, Daniel

79

Formation of ice lenses and frost heave A. W. Rempel1  

E-Print Network (OSTI)

between the ice and matrix surfaces produce a diverse array of behavior, including the growth of needleFormation of ice lenses and frost heave A. W. Rempel1 Received 13 April 2006; revised 26 January 2007; accepted 8 March 2007; published 21 June 2007. [1] I examine the morphology of ice growth

Rempel, Alan W.

80

SPORT & RECREATION SERVICES-ICE HOCKEY INTRAMURALS RELEASE OF LIABILITY, WAIVER OF CLAIMS,  

E-Print Network (OSTI)

of injury arising from falling and impacting against the floor or ice surface, walls or rink boardsSPORT & RECREATION SERVICES-ICE HOCKEY INTRAMURALS RELEASE OF LIABILITY, WAIVER OF CLAIMS #:______________________ TO: THE UNIVERSITY OF LETHBRIDGE (THE "UOFL"), THE ACTIVITY: The UofL plays host to Ice Hockey

Burg, Theresa

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Journal of Nondestructive Evaluation, Vol. 23, No. 3, September 2004 ( C 2004) Eddy Current Assessment of Near-Surface Residual  

E-Print Network (OSTI)

reason why nickel-base superalloys, which are often used in the most critical gas-turbine engine applications, including gas-turbine engines. Modern aircraft turbine engine components are designed using Assessment of Near-Surface Residual Stress in Shot-Peened Nickel-Base Superalloys Mark P. Blodgett1 and Peter

Nagy, Peter B.

82

Assessing the flammability of surface fuels beneath ornamental vegetation in wildland urban interfaces in Provence (south-eastern France)  

E-Print Network (OSTI)

characteristics according to the composition of their litter. Hierarchical cluster analysis ranked the sevenAssessing the flammability of surface fuels beneath ornamental vegetation in wildland� urbanA A Irstea UR EMAX, 3275 route de C�zanne, CS 40061, F-13182 Aix-en-Provence, cedex 5, France. B

Boyer, Edmond

83

A practical profile of integrated safety assessment of near-surface disposal of radwaste at  

Science Journals Connector (OSTI)

Near-surface or shallow land disposal of radioactive waste has been the primary practice at the Pakistan Institute of Nuclear Science and Technology (PINSTECH). The adopted choice of this mode of disposal has been based on a study of the site and the quality and quantity of waste generated at the 5MW reactor with HEU fuel. Specific measures regarding the radiation safety of the workers and environmental protection have been adopted. The waste disposal operations are conducted to meet local regulatory requirements, IAEA recommendations and internationally endorsed principles such as ALARA (as low as reasonably achievableeconomic, social and other relevant factors being considered). The data obtained through the years of operational and management experience have manifested the robustness of the disposal system and reliability of the disposal criterion, and have also served to further refine the latter. Consequently, confidence in the current shallow-land-burial practices has increased. Radiological safety of these practices has been assessed by addressing different aspects of the safety and disposal system. These parameters, as indices of a non-exclusive and operational safety model, are presented.

F Jan; S S Ahmad; S M Hasany; M Aslam

2007-01-01T23:59:59.000Z

84

Fish Smother Under Ice  

NLE Websites -- All DOE Office Websites (Extended Search)

Smother Under Ice Smother Under Ice A BULLETIN FOR THE CHICAGO PUBLIC SCHOOLS DESIGNED FOR INCLUSION IN THE WEEKLY ANNOUNCEMENT SENT OUT FROM THE OFFICE OF SUPT. WILLIAM H. JOHNSON Clayton F. Smith, President Roberts Mann, Superintendent of Conservation February 1, 1945 Nature Bulletin No. 1 FOREST PRESERVE NOTES Grown-ups, who used to kive on a farm or in a small town, are fond of talking about the old-fashioned winters "when I was a boy" and the winters that grandpa used to tell about. Well, one would have to go back a long, long time to find a winter as severe as this one. FISH SMOTHER UNDER ICE Lakes and streams breathe the same as living things. When they are covered with ice and snow they cannot get air and they much hold their breath until the ice thaws. While they are holding their breath the oxygen in the water is gradually used up by the living things sealed up in it -- fish, plants "bugs", snails, and hosts of microscopic life. If the ice lasts long enough, these living things die one after another as each kind reaches the point where it cannot stand any further oxygen starvation. Sometimes temporary relief is given by rains and melting snow that bring fresh, serated water under the ice, but no method of artificial respiration has been found that works. Sometimes, too, when water plants get enough sunlight through clear ice they produce small amounts of oxygen and delay the suffocation of the fish, etc.; but when snow and cloudy ice cuts off the light this does not happen.

85

Surface premelting  

Science Journals Connector (OSTI)

The most important results obtained in the theory of surface premelting of crystals are briefly discussed on the basis of the vibration-positional model, the quasiliquid layer model, the surface roughness model, and in the case of ice, the model of the oriented dipoles at the surface. A review of the existing experimental results on surface premelting is presented, these results being obtained by investigating the crystal morphology, the polar diagram of the specific surface energy, the surface self-diffusion, the thermal emissivity, as well as upon application of LEED, NMR, Rutherford backscattering at proton channeling and ellipsometry. The agreement between theoretical and experimental data is discussed.

D. Nenow

1984-01-01T23:59:59.000Z

86

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 42, NO. 7, JULY 2004 1433 Automatic Detection and Validity of the Sea-Ice  

E-Print Network (OSTI)

by insulating the ocean from the atmosphere and increasing the surface albedo. Sea-ice Manuscript received Detection and Validity of the Sea-Ice Edge: An Application of Enhanced-Resolution QuikScat/SeaWinds Data Abstract--Sea-ice edge detection is an essential task at the different national ice services to secure

Long, David G.

87

Safety Assessment for a Surface Repository in the Chernobyl Exclusion Zone - Methodology for Assessing Disposal under Intervention Conditions - 13476  

SciTech Connect

The Radioactive Waste Disposal Facility (RWDF) Buryakovka was constructed in 1986 as part of the intervention measures after the accident at Chernobyl NPP (ChNPP). Today, RWDF Buryakovka is still being operated but its maximum capacity is nearly reached. Plans for enlargement of the facility exist since more than 10 years but have not been implemented yet. In the framework of an European Commission Project DBE Technology GmbH prepared a safety analysis report of the facility in its current state (SAR) and a preliminary safety analysis report (PSAR) based on the planned enlargement. Due to its history RWDF Buryakovka does not fully comply with today's best international practices and the latest Ukrainian regulations in this area. The most critical aspects are its inventory of long-lived radionuclides, and the non-existent multi-barrier waste confinement system. A significant part of the project was dedicated, therefore, to the development of a methodology for the safety assessment taking into consideration the facility's special situation and to reach an agreement with all stakeholders involved in the later review and approval procedure of the safety analysis reports. Main aspect of the agreed methodology was to analyze the safety, not strictly based on regulatory requirements but on the assessment of the actual situation of the facility including its location within the Exclusion Zone. For both safety analysis reports, SAR and PSAR, the assessment of the long-term safety led to results that were either within regulatory limits or within the limits allowing for a specific situational evaluation by the regulator. (authors)

Haverkamp, B.; Krone, J. [DBE TECHNOLOGY GmbH, Eschenstr. 55, D-31224 Peine (Germany)] [DBE TECHNOLOGY GmbH, Eschenstr. 55, D-31224 Peine (Germany); Shybetskyi, I. [Radioenvironmental Centre at Presidium of National Academy of Sciences of Ukraine, Ul. O. Gonchara 55 b, 01054 Kiev (Ukraine)] [Radioenvironmental Centre at Presidium of National Academy of Sciences of Ukraine, Ul. O. Gonchara 55 b, 01054 Kiev (Ukraine)

2013-07-01T23:59:59.000Z

88

DIFFRACTION STUDIES OF ICE Alexe BOSAK  

E-Print Network (OSTI)

Ic 28o halo observed at least 7 times since 1629 octahedral particles of ice Ic! #12;Cooling downDIFFRACTION STUDIES OF ICE Alexeï BOSAK European Synchrotron Radiation Facility #12;Ice as the mild threat ice Ih the only ice in the crust #12;Ice as the absolute weapon Ice IX : melting point 45.8°C

Titov, Anatoly

89

The Viscosity of Ice  

Science Journals Connector (OSTI)

11 September 1908 research-article The Viscosity of Ice R. M. Deeley The Royal Society is collaborating with JSTOR to digitize, preserve, and extend access to Proceedings of...

1908-01-01T23:59:59.000Z

90

Ice Nuclei in Marine Air: Biogenic Particles or Dust?  

SciTech Connect

Ice nuclei impact clouds, but their sources and distribution in the atmosphere are still not well known. Particularly little attention has been paid to IN sources in marine environments, although evidence from field studies suggests that IN populations in remote marine regions may be dominated by primary biogenic particles associated with sea spray. In this exploratory model study, we aim to bring attention to this long-neglected topic and identify promising target regions for future field campaigns. We assess the likely global distribution of marine biogenic ice nuclei using a combination of historical observations, satellite data and model output. By comparing simulated marine biogenic immersion IN distributions and dust immersion IN distributions, we predict strong regional differences in the importance of marine biogenic IN relative to dust IN. Our analysis suggests that marine biogenic IN are most likely to play a dominant role in determining IN concentrations in near-surface-air over the Southern Ocean, so future field campaigns aimed at investigating marine biogenic IN should target that region. Climate related changes in the abundance and emission of biogenic marine IN could affect marine cloud properties, thereby introducing previously unconsidered feedbacks that influence the hydrological cycle and the Earths energy balance. Furthermore, marine biogenic IN may be an important aspect to consider in proposals for marine cloud brightening by artificial sea spray production.

Burrows, Susannah M.; Hoose, C.; Poschl, U.; Lawrence, M.

2013-01-11T23:59:59.000Z

91

ICE Raids: Compounding Production, Contradiction, and Capitalism  

E-Print Network (OSTI)

America: Factories and ICE Raids Produce Citizens Americansubjects. ICE raids (re)produce workers contradictoryfactories and ICE raids have come to produce immigrant

Reas, Elizabeth I

2009-01-01T23:59:59.000Z

92

Large Scale Ice Water Path and 3-D Ice Water Content  

DOE Data Explorer (OSTI)

Cloud ice water concentration is one of the most important, yet poorly observed, cloud properties. Developing physical parameterizations used in general circulation models through single-column modeling is one of the key foci of the ARM program. In addition to the vertical profiles of temperature, water vapor and condensed water at the model grids, large-scale horizontal advective tendencies of these variables are also required as forcing terms in the single-column models. Observed horizontal advection of condensed water has not been available because the radar/lidar/radiometer observations at the ARM site are single-point measurement, therefore, do not provide horizontal distribution of condensed water. The intention of this product is to provide large-scale distribution of cloud ice water by merging available surface and satellite measurements. The satellite cloud ice water algorithm uses ARM ground-based measurements as baseline, produces datasets for 3-D cloud ice water distributions in a 10 deg x 10 deg area near ARM site. The approach of the study is to expand a (surface) point measurement to an (satellite) areal measurement. That is, this study takes the advantage of the high quality cloud measurements at the point of ARM site. We use the cloud characteristics derived from the point measurement to guide/constrain satellite retrieval, then use the satellite algorithm to derive the cloud ice water distributions within an area, i.e., 10 deg x 10 deg centered at ARM site.

Liu, Guosheng

93

Assessing the Accuracy of Contact Angle Measurements for Sessile Drops on Liquid-Repellent Surfaces  

E-Print Network (OSTI)

Gravity-induced sagging can amplify variations in goniometric measurements of the contact angles of sessile drops on super-liquid-repellent surfaces. The very large value of the effective contact angle leads to increased ...

Srinivasan, Siddarth

94

A New Approach for Exploring Ice Sheets and Sub-Ice Geology  

E-Print Network (OSTI)

-velocity gradient in the surface layer. The boreholes are drilled by different techniques, requiring considerable in controlling ice dynam- ics and is largely determined by the pres- ence of water and/or sediments underneath Geological Drilling (ANDRILL)). Nev- ertheless, the available literature demon- strates that seismic studies

Kristoffersen, Yngve

95

IAHR International Symposium on Ice Singapore, August 11 to 15, 2014  

E-Print Network (OSTI)

horizontal grid size of 2 km. The model uses time-dependent wind stress and heat flux forcing at the surface of thermal structure, ice cover and heat exchange with atmosphere. Our specific objectives are to: Determine temperature and circulation using field observations; Determine the impact of lake ice on surface heat

96

Dynamical mechanism of antifreeze proteins to prevent ice growth  

E-Print Network (OSTI)

The fascinating ability of algae, insects and fishes to survive at temperatures below normal freezing is realized by antifreeze proteins (AFPs). These are surface-active molecules and interact with the diffusive water/ice interface thus preventing complete solidification. We propose a new dynamical mechanism on how these proteins inhibit the freezing of water. We apply a Ginzburg-Landau type approach to describe the phase separation in the two-component system (ice, AFP). The free energy density involves two fields: one for the ice phase with a low AFP concentration, and one for liquid water with a high AFP concentration. The time evolution of the ice reveals microstructures resulting from phase separation in the presence of AFPs. We observed a faster clustering of pre-ice structure connected to a locking of grain size by the action of AFP, which is an essentially dynamical process. The adsorption of additional water molecules is inhibited and the further growth of ice grains stopped. The interfacial energy between ice and water is lowered allowing the AFPs to form smaller critical ice nuclei. Similar to a hysteresis in magnetic materials we observe a thermodynamic hysteresis leading to a nonlinear density dependence of the freezing point depression in agreement with the experiments.

B. Kutschan; K. Morawetz; S. Thoms

2014-06-19T23:59:59.000Z

97

Ice cream headache  

NLE Websites -- All DOE Office Websites (Extended Search)

Ice cream headache Ice cream headache Name: fath Status: N/A Age: N/A Location: N/A Country: N/A Date: Around 1993 Question: What causes an "ice cream headache"? Are they dangerous? What would happen if I induced an ice cream headache when I had a regular headache? Replies: This is really a neat question. I am certainly no expert on headaches, but it has a lot to do blood circulation in the sinuses and around and within the brain. Why do some people get them easily and other seem resistant? The cold might restrict blood flow which is the basis for the problem. An Ice cream headache can be turned "on" or "off" by adjusting the rate of consumption, Slurpees work best, so really cold stuff enhances the effect. Are there stages: cold sensation, lingering headache, subsiding headache, warming, etc? Does the cold actually create similar headache "conditions" or does the brain confused cause it cannot directly feel pain? The difference in people is probably due to differences in arteriole branching and general circulation. In my experience smokers get worse headaches than nonsmokers of the same age. Do you find a similar trend? I am trying to stimulate discussion!

98

Ice Heating Up Cold Clouds | EMSL  

NLE Websites -- All DOE Office Websites (Extended Search)

Ice Heating Up Cold Clouds Ice Heating Up Cold Clouds In a heated battle, ice crystals win the competition for cloud water vapor The mighty cloud ice crystal appears deceptively...

99

Designing for effective stationkeeping in ice  

E-Print Network (OSTI)

and intervention vessels for Arctic oil and gas. #12;2. An effective Ice Management system · Ice Management for the CIVArctic vessel. - Comparison with the ice model tests carried out in the Aker Arctic ice tank in May 2011

Nørvåg, Kjetil

100

Atmospheric Circulation and Its Effect on Arctic Sea Ice in CCSM3 Simulations at Medium and High Resolution*  

E-Print Network (OSTI)

the Canadian archipelago, where the T85 winds produce thicker ice than their T42 counterparts. Seasonal forcingAtmospheric Circulation and Its Effect on Arctic Sea Ice in CCSM3 Simulations at Medium and High) ABSTRACT The simulation of Arctic sea ice and surface winds changes significantly when Community Climate

Bitz, Cecilia

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Controls on Eurasian coastal sea ice formation, melt onset and decay from ERS scatterometry: regional contrasts and effects of river  

E-Print Network (OSTI)

first-year sea ice (FYI) are observed in the Eurasian Arctic using the C-band (5.3 GHz) European RemoteControls on Eurasian coastal sea ice formation, melt onset and decay from ERS scatterometry and Kolyma rivers. Melt onset of the sea ice surface is associated with abrupt changes in s0 40, with values

Smith, Laurence C.

102

An Investigation of Light Scattering by Irregular Ice Crystals via PSTD  

E-Print Network (OSTI)

to determine the validity PSTD with CPML. We propose a random field model for surface irregularities of ice crystals with roughened surfaces. Results using this model show that reflection probability decreases exponentially as the roughness is increased...

Zhang, Jianing

2014-07-28T23:59:59.000Z

103

Risk assessment of surface vs subsea blowout preventers (bops) on mobile offshore drilling units focusing on riser failure and the use of subsea shear rams  

E-Print Network (OSTI)

RISK ASSESSMENT OF SURFACE VS SUBSEA BLOWOUT PREVENTERS (BOPS) ON MOBILE OFFSHORE DRILLING UNITS FOCUSING ON RISER FAILURE AND THE USE OF SUBSEA SHEAR RAMS A Thesis by JORGE LUIS MELENDEZ Submitted to the Office of Graduate Studies... of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 2006 Major Subject: Petroleum Engineering RISK ASSESSMENT OF SURFACE VS SUBSEA BLOWOUT PREVENTERS (BOPS) ON MOBILE OFFSHORE...

Melendez, Jorge Luis

2006-08-16T23:59:59.000Z

104

Comparison of Innovative Molecular Approaches and Standard Spore Assays for Assessment of Surface Cleanliness  

Science Journals Connector (OSTI)

...sampling. A more plausible explanation may be the random capture of airborne spore-bearing particles from the air within the cleanroom where the spacecraft was assembled and sampled. The low incidence of detectable spores on the surfaces of the spacecraft...

Moogega Cooper; Myron T. La Duc; Alexander Probst; Parag Vaishampayan; Christina Stam; James N. Benardini; Yvette M. Piceno; Gary L. Andersen; Kasthuri Venkateswaran

2011-06-07T23:59:59.000Z

105

Revised estimates of Greenland ice sheet thinning histories based on ice-core records  

Science Journals Connector (OSTI)

Ice core records were recently used to infer elevation changes of the Greenland ice sheet throughout the Holocene. The inferred elevation changes show a significantly greater elevation reduction than those output from numerical models, bringing into question the accuracy of the model-based reconstructions and, to some extent, the estimated elevation histories. A key component of the ice core analysis involved removing the influence of vertical surface motion on the ?18O signal measured from the Agassiz and Renland ice caps. We re-visit the original analysis with the intent to determine if the use of more accurate land uplift curves can account for some of the above noted discrepancy. To improve on the original analysis, we apply a geophysical model of glacial isostatic adjustment calibrated to sea-level records from the Queen Elizabeth Islands and Greenland to calculate the influence of land height changes on the ?18O signal from the two ice cores. This procedure is complicated by the fact that ?18O contained in Agassiz ice is influenced by land height changes distant from the ice cap and so selecting a single location at which to compute the land height signal is not possible. Uncertainty in this selection is further complicated by the possible influence of Innuitian ice during the early Holocene (128kaBP). Our results indicate that a more accurate treatment of the uplift correction leads to elevation histories that are, in general, shifted down relative to the original curves at GRIP, NGRIP, DYE-3 and Camp Century. In addition, compared to the original analysis, the 1-? uncertainty is considerably larger at GRIP and NGRIP. These changes reduce the data-model discrepancy reported by Vinther etal. (2009) at GRIP, NGRIP, DYE-3 and Camp Century. A more accurate treatment of isostasy and surface loading also acts to improve the data-model fits such that the residuals at all four sites for the period 8kaBP to present are significantly reduced compared to the original analysis. Prior to 8kaBP, the possible influence of Innuitian ice on the inferred elevation histories prevents a meaningful comparison.

Benoit S. Lecavalier; Glenn A. Milne; Bo M. Vinther; David A. Fisher; Arthur S. Dyke; Matthew J.R. Simpson

2013-01-01T23:59:59.000Z

106

Metastable hydronium ions in UV-irradiated ice  

SciTech Connect

We show that the irradiation of UV light (10-11 eV) onto an ice film produces metastable hydronium (H{sub 3}O{sup +}) ions in the ice at low temperatures (53-140 K). Evidence of the presence of metastable hydronium ions was obtained by experiments involving adsorption of methylamine onto UV-irradiated ice films and hydrogen-deuterium (H/D) isotopic exchange reaction. The methylamine adsorption experiments showed that photogenerated H{sub 3}O{sup +} species transferred a proton to the methylamine arriving at the ice surface, thus producing the methyl ammonium ion, which was detected by low energy sputtering method. The H{sub 3}O{sup +} species induced the H/D exchange of water, which was monitored through the detection of water isotopomers on the surface by using the Cs{sup +} reactive ion scattering method. Thermal and temporal stabilities of H{sub 3}O{sup +} and its proton migration activity were examined. The lifetime of the hydronium ions in the amorphized ice was greater than 1 h at {approx}53 K and decreased to {approx}5 min at 140 K. Interestingly, a small portion of hydronium ions survived for an extraordinarily long time in the ice, even at 140 K. The average migration distance of protons released from H{sub 3}O{sup +} in the ice was estimated to be about two water molecules at {approx}54 K and about six molecules at 100 K. These results indicate that UV-generated hydronium ions can be efficiently stabilized in low-temperature ice. Such metastable hydronium ions may play a significant role in the acid-base chemistry of ice particles in interstellar clouds.

Moon, Eui-Seong; Kang, Heon [Department of Chemistry, Seoul National University, 1 Gwanak-ro, Seoul 151-747 (Korea, Republic of)

2012-11-28T23:59:59.000Z

107

Molecules, ices and astronomy  

Science Journals Connector (OSTI)

......research-article Features Molecules, ices and astronomy David A Williams, Wendy A Brown, Stephen...brown@ucl.ac.uk Dept of Physics and Astronomy, University College London, Gower Street...of Chemistry, UCL Dept of Physics and Astronomy, UCL Over the past 40 years, about......

D A Williams; W A Brown; S D Price; J M C Rawlings; S Viti

2007-02-01T23:59:59.000Z

108

ice | proceedings Forensic Engineering  

E-Print Network (OSTI)

ice | proceedings Forensic Engineering Volume 165 Issue FE4 November 2012 Forensic Engineering or economic damage. Research and practice papers are sought on traditional or modern forensic engineering, design and construction. Topics covered also include research and education best practice in forensic

Mottram, Toby

109

Ice surfaces: macroscopic effects of microscopic structure  

Science Journals Connector (OSTI)

...a particle of water, which could retain...of exhausting the power of some of the principles...angle, rather like water droplets on a freshly waxed car. If the intrafluid...raise a 3000 lb car. Normally, long...soil breaks open. Water then flows into...

1999-01-01T23:59:59.000Z

110

Final Report DE-EE0005380: Assessment of Offshore Wind Farm Effects on Sea Surface, Subsurface and Airborne Electronic Systems  

SciTech Connect

Offshore wind energy is a valuable resource that can provide a significant boost to the US renewable energy portfolio. A current constraint to the development of offshore wind farms is the potential for interference to be caused by large wind farms on existing electronic and acoustical equipment such as radar and sonar systems for surveillance, navigation and communications. The US Department of Energy funded this study as an objective assessment of possible interference to various types of equipment operating in the marine environment where offshore wind farms could be installed. The objective of this project was to conduct a baseline evaluation of electromagnetic and acoustical challenges to sea surface, subsurface and airborne electronic systems presented by offshore wind farms. To accomplish this goal, the following tasks were carried out: (1) survey electronic systems that can potentially be impacted by large offshore wind farms, and identify impact assessment studies and research and development activities both within and outside the US, (2) engage key stakeholders to identify their possible concerns and operating requirements, (3) conduct first-principle modeling on the interactions of electromagnetic signals with, and the radiation of underwater acoustic signals from, offshore wind farms to evaluate the effect of such interactions on electronic systems, and (4) provide impact assessments, recommend mitigation methods, prioritize future research directions, and disseminate project findings. This report provides a detailed description of the methodologies used to carry out the study, key findings of the study, and a list of recommendations derived based the findings.

Ling, Hao [The University of Texas at Austin] [The University of Texas at Austin; Hamilton, Mark F. [The University of Texas at Austin Applied Research Laboratories] [The University of Texas at Austin Applied Research Laboratories; Bhalla, Rajan [Science Applications International Corporation] [Science Applications International Corporation; Brown, Walter E. [The University of Texas at Austin Applied Research Laboratories] [The University of Texas at Austin Applied Research Laboratories; Hay, Todd A. [The University of Texas at Austin Applied Research Laboratories] [The University of Texas at Austin Applied Research Laboratories; Whitelonis, Nicholas J. [The University of Texas at Austin] [The University of Texas at Austin; Yang, Shang-Te [The University of Texas at Austin] [The University of Texas at Austin; Naqvi, Aale R. [The University of Texas at Austin] [The University of Texas at Austin

2013-09-30T23:59:59.000Z

111

Assessment  

NLE Websites -- All DOE Office Websites (Extended Search)

Assessment of the Surveillance Program of the High-Level Waste Storage Tanks at Hanford :.I LALI iE REJ 163 ROOM 1t 4 F77L. -77 .:earmn OfEeg Asitn Sertr fo niomn 4 z. r...

112

Assessment of Structural and Clad Materials for Fission Surface Power Systems  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ORNL/LTR-2011/351 ORNL/LTR-2011/351 Reactor Pressure Vessel Task of Light Water Reactor Sustainability Program: Initial Assessment of Thermal Annealing Needs and Challenges September 2011 Prepared by R.K. Nanstad, Oak Ridge National Laboratory and W. L. Server, ATI Consulting This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product,

113

The effect of selective desorption mechanisms during interstellar ice formation  

E-Print Network (OSTI)

Major components of ices on interstellar grains in molecular clouds - water and carbon oxides - occur at various optical depths. This implies that selective desorption mechanisms are at work. An astrochemical model of a contracting low-mass molecular cloud core is presented. Ice was treated as consisting of the surface and three subsurface layers (sublayers). Photodesorption, reactive desorption, and indirect reactive desorption were investigated. The latter manifests itself through desorption from H+H reaction on grains. Desorption of shallow subsurface species was included. Modeling results suggest the existence of a "photon-dominated ice" during the early phases of core contraction. Subsurface ice is chemically processed by interstellar photons, which produces complex organic molecules. Desorption from the subsurface layer results in high COM gas-phase abundances at Av = 2.4...10mag. This may contribute towards an explanation for COM observations in dark cores. It was found that photodesorption mostly gove...

Kalvans, Juris

2015-01-01T23:59:59.000Z

114

Arctic sea ice modeling with the material-point method.  

SciTech Connect

Arctic sea ice plays an important role in global climate by reflecting solar radiation and insulating the ocean from the atmosphere. Due to feedback effects, the Arctic sea ice cover is changing rapidly. To accurately model this change, high-resolution calculations must incorporate: (1) annual cycle of growth and melt due to radiative forcing; (2) mechanical deformation due to surface winds, ocean currents and Coriolis forces; and (3) localized effects of leads and ridges. We have demonstrated a new mathematical algorithm for solving the sea ice governing equations using the material-point method with an elastic-decohesive constitutive model. An initial comparison with the LANL CICE code indicates that the ice edge is sharper using Materials-Point Method (MPM), but that many of the overall features are similar.

Peterson, Kara J.; Bochev, Pavel Blagoveston

2010-04-01T23:59:59.000Z

115

Formation of high density amorphous ice by decompression of ice VII and ice VIII at 135 K  

E-Print Network (OSTI)

of ice Ih and are found to have very similar structures. By cooling liquid water along the water trans- forms into ice VIII when cooled . With this in mind Klug et al. were able to produce low densityFormation of high density amorphous ice by decompression of ice VII and ice VIII at 135 K Carl Mc

McBride, Carl

116

Hidden force floating ice  

E-Print Network (OSTI)

Because of the segmental specific-heat disparity of the hydrogen bond (O:H-O) and the Coulomb repulsion between oxygen ions, cooling elongates the O:H-O bond at freezing by stretching its containing angle and shortening the H-O bond with an association of larger O:H elongation, which makes ice less dense than water, allowing it to float.

Chang Q. Sun

2015-01-17T23:59:59.000Z

117

Electromagnetic and physical properties of sea ice formed in the presence of wave action  

E-Print Network (OSTI)

Estimating the magnitude of brine flux to the upper ocean requires an ability to assess the dynamics of the formation of sea ice in a region. Brine storage and rate of expulsion is determined by the environmental conditions under which the sea ice...

Onstott, R. G.; Gogineni, Sivaprasad; Gow, A. J.; Grenfell, T. C.; Jezek, K. C.; Perovich, D. K.; Swift, C. T.

1998-09-01T23:59:59.000Z

118

Methanesulfonate in the Greenland Ice Sheet Project 2 Ice Core  

E-Print Network (OSTI)

sulfate in the Dye 3 and Camp Century Greenland ice cores infor SO4 2- in the Dye 3, Camp Century, MSA to non-sea salt

Saltzman, E. S; Whung, P.-Y.; Mayewski, P. A

1997-01-01T23:59:59.000Z

119

Standard BYU QuikSCAT and Seawinds Land/Ice Image Products David G. Long  

E-Print Network (OSTI)

Standard BYU QuikSCAT and Seawinds Land/Ice Image Products David G. Long Revised By: Brandon R originally designed for wind observation, scatterometers have proven useful in a variety of land and ice developed and applied to the data. These algorithms produce images of the surface o at enhanced resolution

Long, David G.

120

Palaeoproterozoic ice houses and the evolution of oxygen-mediating enzymes: the case for a late  

E-Print Network (OSTI)

Palaeoproterozoic ice houses and the evolution of oxygen-mediating enzymes: the case for a late evolved. One solution to the first problem is the accumulation of photochemically produced H2O2 at the surface of the glaciers and its subsequent incorporation into ice. Melting at the glacier base would

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Lampton & Valasek-1 Aerospace Engineering Prediction of Icing Effects on the Stability and  

E-Print Network (OSTI)

Lampton & Valasek- 1 Aerospace Engineering Prediction of Icing Effects on the Stability and Control content Median volumetric diameter #12;Lampton & Valasek- 5 Aerospace Engineering Separation Bubble Schematic of Upper Surface Separation Bubble Aft of Leading-Edge Ice Accretion #12;Lampton & Valasek- 6

Valasek, John

122

ORNL results for Test Case 1 of the International Atomic Energy Agency`s research program on the safety assessment of Near-Surface Radioactive Waste Disposal Facilities  

SciTech Connect

The International Atomic Energy Agency (IAEA) started the Coordinated Research Program entitled ```The Safety Assessment of Near-Surface Radioactive Waste Disposal Facilities.`` The program is aimed at improving the confidence in the modeling results for safety assessments of waste disposal facilities. The program has been given the acronym NSARS (Near-Surface Radioactive Waste Disposal Safety Assessment Reliability Study) for ease of reference. The purpose of this report is to present the ORNL modeling results for the first test case (i.e., Test Case 1) of the IAEA NSARS program. Test Case 1 is based on near-surface disposal of radionuclides that are subsequently leached to a saturated-sand aquifer. Exposure to radionuclides results from use of a well screened in the aquifer and from intrusion into the repository. Two repository concepts were defined in Test Case 1: a simple earth trench and an engineered vault.

Thorne, D.J.; McDowell-Boyer, L.M.; Kocher, D.C.; Little, C.A. [Oak Ridge National Lab., Grand Junction, CO (United States); Roemer, E.K. [Oak Ridge Inst. for Science and Education, TN (United States)

1993-07-01T23:59:59.000Z

123

Projected Changes to the Southern Hemisphere Ocean and Sea Ice in the IPCC AR4 Climate Models  

Science Journals Connector (OSTI)

Fidelity and projected changes in the climate models, used for the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4), are assessed with regard to the Southern Hemisphere extratropical ocean and sea ice systems. While ...

Alexander Sen Gupta; Agus Santoso; Andra S. Taschetto; Caroline C. Ummenhofer; Jessica Trevena; Matthew H. England

2009-06-01T23:59:59.000Z

124

Fire and Ice Issue 9  

E-Print Network (OSTI)

s FIRE AND ICE # 9 IB FIRE ICE #9 A Blake/Avon slash fanzine r Available from: Kathleen Resch POBox 1766 Temple City, CA 91780 Kathleener@aol.com FIRE AND ICE # 9copyright May, 2005 by Kathleen Resch for the contributors. No reprints... or reproduction without the written permission ofthe author/artist This is an amateur publication and is not p intended to infringe upon the rights ofany holders of"Blake's 7" copyrights. FIRE AND ICE 9 TABLE OF CONTENTS LEAVING ROOM 101 by Nova 2 TOO MANY...

Multiple Contributors

2005-01-01T23:59:59.000Z

125

Ice-induced enhancement of solar radiation beneath overcast skies near Antarctica  

E-Print Network (OSTI)

, the increase of irradiance occurred at a distance from the icu edge equal to 25X of the path length through the ice-covered area. Intensification factors were calculated for comparison with results of previous studies. When compared with the results.... Percentage increases of irradiance ranged from 7X to 79X, and the distance from the ice edge at which the ice enhancement was observed ranged from 23 m to 1729 m. The lower values in both instances were associated with minimum surface ice. On the average...

Horvath, Nicholas Charles

1981-01-01T23:59:59.000Z

126

Measuring the Muon Content of Air Showers with IceTop  

E-Print Network (OSTI)

IceTop, the surface component of the IceCube detector, has been used to measure the energy spectrum of cosmic ray primaries in the range between 1.58 PeV and 1.26 EeV. It can also be used to study the low energy muons in air showers by looking at large distances (> 300m) from the shower axis. We will show the muon lateral distribution function at large lateral distances as measured with IceTop and discuss the implications of this measurement. We also discuss the prospects for low energy muon studies with IceTop.

Gonzalez, Javier G

2015-01-01T23:59:59.000Z

127

Assessment  

NLE Websites -- All DOE Office Websites (Extended Search)

Genetic Genetic Variability of Cell Wall Degradability for the Selection of Alfalfa with Improved Saccharification Efficiency Marc-Olivier Duceppe & Annick Bertrand & Sivakumar Pattathil & Jeffrey Miller & Yves Castonguay & Michael G. Hahn & Réal Michaud & Marie-Pier Dubé # Her Majesty the Queen in Right of Canada 2012 Abstract Alfalfa (Medicago sativa L.) has a high potential for sustainable bioethanol production, particularly because of its low reliance on N fertilizer. We assessed near-infrared reflec- tance spectroscopy (NIRS) as a high-throughput technique to measure cell wall (CW) degradability in a large number of lignified alfalfa stem samples. We also used a powerful immu- nological approach, glycome profiling, and chemical analyses to increase our knowledge of the composition of CW poly- saccharides of alfalfa stems with various levels

128

ARM - Lesson Plans: When Land Ice Melts  

NLE Websites -- All DOE Office Websites (Extended Search)

ice melts? Do you think melting glaciers and other land-based ice masses will make sea level rise? Will it submerge the continents on which the ice used to be? Most of the...

129

The IceCube Collaboration: contributions to the 30th International Cosmic Ray Conference (ICRC 2007)  

E-Print Network (OSTI)

This paper bundles 40 contributions by the IceCube collaboration that were submitted to the 30th International Cosmic Ray Conference ICRC 2007. The articles cover studies on cosmic rays and atmospheric neutrinos, searches for non-localized, extraterrestrial electron, muon and tau neutrino signals, scans for steady and intermittent neutrino point sources, searches for dark matter candidates, magnetic monopoles and other exotic particles, improvements in analysis techniques, as well as future detector extensions. The IceCube observatory will be finalized in 2011 to form a cubic-kilometer ice-Cherenkov detector at the location of the geographic South Pole. At the present state of construction, IceCube consists of 52 paired IceTop surface tanks and 22 IceCube strings with a total of 1426 Digital Optical Modules deployed at depths up to 2350 m. The observatory also integrates the 19 string AMANDA subdetector, that was completed in 2000 and extends IceCube's reach to lower energies. Before the deployment of IceTop, cosmic air showers were registered with the 30 station SPASE-2 surface array. IceCube's low noise Digital Optical Modules are very reliable, show a uniform response and record waveforms of arriving photons that are resolvable with nanosecond precision over a large dynamic range. Data acquisition, reconstruction and simulation software are running in production mode and the analyses, profiting from the improved data quality and increased overall sensitivity, are well under way.

The IceCube Collaboration

2007-11-02T23:59:59.000Z

130

Generated using version 3.0 of the official AMS LATEX template Can North Atlantic sea ice anomalies account for Dansgaard-Oeschger climate signals?  

E-Print Network (OSTI)

of sea ice lowers surface temperature by insulating the atmosphere from the ocean heat reservoirGenerated using version 3.0 of the official AMS LATEX template Can North Atlantic sea ice anomalies. 1 #12;ABSTRACT North Atlantic sea ice anomalies are thought to play an important role in the abrupt

Battisti, David

131

The stickiness of micrometer-sized water-ice particles  

E-Print Network (OSTI)

Water ice is one of the most abundant materials in dense molecular clouds and in the outer reaches of protoplanetary disks. In contrast to other materials (e.g., silicates) water ice is assumed to be stickier due to its higher specific surface energy, leading to faster or more efficient growth in mutual collisions. However, experiments investigating the stickiness of water ice have been scarce, particularly in the astrophysically relevant micrometer-size region and at low temperatures. In this work, we present an experimental setup to grow aggregates composed of $\\mathrm{\\mu}$m-sized water-ice particles, which we used to measure the sticking and erosion thresholds of the ice particles at different temperatures between $114 \\, \\mathrm{K}$ and $260 \\, \\mathrm{K}$. We show with our experiments that for low temperatures (below $\\sim 210 \\, \\mathrm{K}$), $\\mathrm{\\mu}$m-sized water-ice particles stick below a threshold velocity of $9.6 \\, \\mathrm{m \\, s^{-1}}$, which is approximately ten times higher than the stic...

Gundlach, B

2014-01-01T23:59:59.000Z

132

Microwave Properties of Ice-Phase Hydrometeors for Radar and Radiometers: Sensitivity to Model Assumptions  

Science Journals Connector (OSTI)

A simplified framework is presented for assessing the qualitative sensitivities of computed microwave properties, satellite brightness temperatures, and radar reflectivities to assumptions concerning the physical properties of ice-phase ...

Benjamin T. Johnson; Grant W. Petty; Gail Skofronick-Jackson

2012-12-01T23:59:59.000Z

133

Therapeutic Hypothermia: Protective Cooling Using Medical Ice...  

NLE Websites -- All DOE Office Websites (Extended Search)

Therapeutic Hypothermia: Protective Cooling Using Medical Ice Slurry Technology available for licensing: Proprietary method and equipment for making an ice slurry coolant to induce...

134

Thermal Desorption of Water-Ice in the Interstellar Medium  

E-Print Network (OSTI)

Water (H2O) ice is an important solid constituent of many astrophysical environments. To comprehend the role of such ices in the chemistry and evolution of dense molecular clouds and comets, it is necessary to understand the freeze-out, potential surface reactivity, and desorption mechanisms of such molecular systems. Consequently, there is a real need from within the astronomical modelling community for accurate empirical molecular data pertaining to these processes. Here we give the first results of a laboratory programme to provide such data. Measurements of the thermal desorption of H2O ice, under interstellar conditions, are presented. For ice deposited under conditions that realistically mimic those in a dense molecular cloud, the thermal desorption of thin films (~50 molecular layers) is found to occur with zero order kinetics characterised by a surface binding energy, E_{des}, of 5773 +/- 60 K, and a pre-exponential factor, A, of 10^(30 +/- 2) molecules cm^-2 s^-1. These results imply that, in the dense interstellar medium, thermal desorption of H2O ice will occur at significantly higher temperatures than has previously been assumed.

Helen J. Fraser; Mark P. Collings; Martin R. S. McCoustra; David A. Williams

2001-07-25T23:59:59.000Z

135

CLM prescribes all solar absorption to occur in the top-most snow layer. However, our SNow, ICe, and Aerosol Radiative model  

E-Print Network (OSTI)

CLM prescribes all solar absorption to occur in the top-most snow layer. However, our SNow, ICe at the surface and strong thermal insulation by the snow. Thus energy deposition beneath the surface layer can. Albedo decrease over the Tibetan Plateau indicates less snow cover, caused by sub-surface melt and ice

Zender, Charles

136

Fluid Migration During Ice/Rock Planetesimal Differentiation  

E-Print Network (OSTI)

/water reaction, which will depend on the rate at which water can be segregated from a melting ice/rock core. For the liquid water phase to migrate toward the surface, the denser rock phase must compact. The primary question that this thesis will answer is how...

Raney, Robert 1987-

2012-12-12T23:59:59.000Z

137

First observations of the interaction of ocean swell with sea ice using satellite radar altimeter data  

Science Journals Connector (OSTI)

... deeper in the pack (Fig. 2b,c) then imply a continuous reduction in the interrelated height and slope distributions of the ocean (or thin ice) surface as a function ... .

C. G. Rapley

1984-01-12T23:59:59.000Z

138

Assessing the cumulative impacts of surface mining and coal bed methane development on shallow aquifers in the Powder River Basin, Wyoming  

SciTech Connect

Large scale surface coal mining taken place along the cropline of the Wyodak-Anderson coal seam since approximately 1977. Groundwater impacts due to surface mining of coal and other energy-related development is a primary regulatory concern and an identified Office of Surface Mining deficiency in the Wyoming coal program. The modeled aquifers are the upper unit (coal) of the Paleocene Fort Union Formation and the overlying Eocene Wasatch Formation. A regional groundwater model covering 790 square miles was constructed using MODFLOW, to simulate the impacts from three surface coal mines and coal bed methane development occurring downdip. Assessing anisotropy of the coal aquifer, quality checking of in situ aquifer tests and database quality control were precursors to modelling. Geologic data was kriged to develop the structural model of the aquifers. A Geographic Information System (GIS) was utilized to facilitate storage, analysis, display, development of input modelling arrays and assessment of hydrologic boundaries. Model output presents the predicted impacts of likely development scenarios, including impacts from coal bed methane development and surface coal mining through anticipated life of mining, and surface mining impacts independent of gas development.

Peacock, K. [Dept. of Interior, Casper, WY (United States)

1997-12-31T23:59:59.000Z

139

Comment on ``A quantitative framework for interpretation of basal ice facies formed by ice  

E-Print Network (OSTI)

heave would be expected to produce were revealed beneath the Kamb Ice Stream by the pioneering boreholeComment on ``A quantitative framework for interpretation of basal ice facies formed by ice quantitative framework for interpretation of basal ice facies formed by ice accretion over subglacial sediment

Worster, M. Grae

140

Ice coring on Vestfonna Ice Cap Contact person: John Moore (jmoore@ulapland.fi).  

E-Print Network (OSTI)

reach bedrock about 4 tons of ice will need to be flown out to Longyearbyen in insulated boxesIce coring on Vestfonna Ice Cap Contact person: John Moore (jmoore@ulapland.fi). Participants, Polish Academy of Science glowacki@igf.edu.pl Science: Ice cores from the glaciers outside the main ice

Moore, John

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

ORIGINAL PAPER A bacterial ice-binding protein from the Vostok ice core  

E-Print Network (OSTI)

to produce a 54 kDa ice-binding protein (GenBank EU694412) that is similar to ice-binding proteins previously- vival at sub-zero temperatures by producing proteins that bind to and inhibit the growth of ice crystalsORIGINAL PAPER A bacterial ice-binding protein from the Vostok ice core James A. Raymond ? Brent C

Christner, Brent C.

142

The Effects of Rotation and Ice Shelf Topography on Frazil-Laden Ice Shelf Water Plumes  

E-Print Network (OSTI)

, Antarctica. In addition, it is found that the model only produces reasonable marine ice formation rates whenThe Effects of Rotation and Ice Shelf Topography on Frazil-Laden Ice Shelf Water Plumes PAUL R of the dynamics and thermodynamics of a plume of meltwater at the base of an ice shelf is presented. Such ice

Feltham, Daniel

143

IceCube Collaboration Governance Document IceCube Collaboration Governance Document  

E-Print Network (OSTI)

IceCube Collaboration Governance Document IceCube Collaboration Governance Document Revision 8.1, November 21, 2014 Page 1 of 20 #12;IceCube Collaboration Governance Document IceCube Collaboration Governance Document Revision 8.1, November 21, 2014 Collaboration Objectives The IceCube Collaboration (the

Saffman, Mark

144

Climatic Ice Core Records from the Tropical Quelccaya Ice Cap  

Science Journals Connector (OSTI)

...DANSGAARD, W, LATE CENOZOIC GLACIA 37 ( 1971 ). DANSGAARD, W, ONE THOUSAND CENTURIES OF CLIMATIC RECORD FROM CAMP CENTURY ON GREENLAND ICE SHEET, SCIENCE 166 : 377 ( 1969 ). DANSGAARD, W, STABLE ISOTOPES IN PRECIPITATION, TELLUS 16...

LONNIE G. THOMPSON; STEFAN HASTENRATH; BENJAMN MORALES ARNAO

1979-03-23T23:59:59.000Z

145

Fire and Ice Issue 2  

E-Print Network (OSTI)

. fipl cpn r FLASHPOINT A flame that can't be seen, cloaked in black and silver and disdain, born of anger and of love no longer dared. An ice-encrusted soul, dormant in the aftermath of accusations piled like snow against the heated passions of a man who...^ $$% i&l /P^ \\0 rffej FIRE AND ICE AVAILABLE FROM Kathleen Resch PO Box 1766 Temple City, CA 91780 FIRE AND ICE II TABLE OF CONTENTS COVER by Phoenix FRONTISPIECE by Gayle Feyrer "Flashpoint" by Rachel Duncan 1 PEDESTAL by Thomas 2 "A Damn Fine...

Multiple Contributors

1993-01-01T23:59:59.000Z

146

Fire and Ice Issue 7  

E-Print Network (OSTI)

       ' FIRE and ICE # 7 -p! jP) FIRE AND ICE VII Available from: Kathleen Resch PO Box 1766 Temple City, CA 91780 Kathleener@aol.com May 2002by Kathleen Reschfor the contributors. No reprints or reproduction without the written... permission of the author/artist. Thisis an amateur publication and is not in tended to infringe upon the rights ofTerryNation, BBC-TV or any others. i - J FIRE AND ICE VI Table of Contents HALF A LOAF by Linda Norman 1 GROUNDHOG LAY by Predatrlx 5 PLAYTIME...

Multiple Contributors

2002-01-01T23:59:59.000Z

147

Ice mechanics and risks to offshore structures  

SciTech Connect

This volume brings together the results of all salient research development in ice engineering, from smaller scale to full size tests on ice strength and ice mechanics which is essential criteria for the design of safe, cost effective structures. Much of the data has been released from confidential industry files and thus allows, for the first time, a full appraisal of the subject. Contents include - Types and Distribution of Ice, Mechanical Properties, Measurements of Ice-Structure Interaction, and Analysis of Ice Failure and Design Ice Loads. This work is completed with a full literary review and subject index.

Sanderson, T.J.O.

1988-01-01T23:59:59.000Z

148

Decadal to seasonal variability of Arctic sea ice albedo  

E-Print Network (OSTI)

A controlling factor in the seasonal and climatological evolution of the sea ice cover is its albedo $\\alpha$. Here we analyze Arctic data from the Advanced Very High Resolution Radiometer (AVHRR) Polar Pathfinder and assess the seasonality and variability of broadband albedo from a 23 year daily record. We produce a histogram of daily albedo over ice covered regions in which the principal albedo transitions are seen; high albedo in late winter and spring, the onset of snow melt and melt pond formation in the summer, and fall freeze up. The bimodal late summer distribution demonstrates the combination of the poleward progression of the onset of melt with the coexistence of perennial bare ice with melt ponds and open water, which then merge to a broad peak at $\\alpha \\gtrsim $ 0.5. We find the interannual variability to be dominated by the low end of the $\\alpha$ distribution, highlighting the controlling influence of the ice thickness distribution and large-scale ice edge dynamics. The statistics obtained pro...

Agarwal, S; Wettlaufer, J S

2011-01-01T23:59:59.000Z

149

Assessing Surface Solar Irradiance From ISCCP-B2 Data Sets Lefvre M., Diabat L., Wald L., Using reduced data sets ISCCP-B2 from the Meteosat satellites to  

E-Print Network (OSTI)

to assess the daily mean of the surface solar irradiance at any geographical site in Europe and Africa-00363664,version1-24Feb2009 Author manuscript, published in "Solar Energy 81 (2007) 240-253" DOI : 10Assessing Surface Solar Irradiance From ISCCP-B2 Data Sets Lefèvre M., Diabaté L., Wald L., Using

Paris-Sud XI, Université de

150

An experimental and theoretical study of the ice accretion process during artificial and natural icing conditions  

E-Print Network (OSTI)

Real-time measurements of ice growth during artificial and natural icing conditions were conducted using an ultrasonic pulse-echo technique. This technique allows ice thickness to be measured with an accuracy of ?0.5 mm; ...

Kirby, Mark Samuel

1986-01-01T23:59:59.000Z

151

Transcript of "Laparoscopic Partial Nephrectomy with Ice Slurry as Coolant  

NLE Websites -- All DOE Office Websites (Extended Search)

ESE | NE | Site Index | Contact us | Help | Privacy/Security ESE | NE | Site Index | Contact us | Help | Privacy/Security Notice Home > Capabilities > Biomedical Applications > Medical Ice Slurry Coolants > Laparoscopic Partial Nephrectomy with Ice Slurry as Coolant in the Porcine Model > Transcript The Multimedia Collection Laparoscopic Partial Nephrectomy with Ice Slurry as Coolant in the Porcine Model Laparoscopic Partial Nephrectomy with Ice Slurry as Coolant in the Porcine Model VIDEO TRANSCRIPT Achieving optimal hypothermia of the kidney during laparoscopic partial nephrectomy remains a challenge and also an obstacle for wide-spread adoption of this technique for nephron-sparing surgery. Other approaches for renal cooling such as perfusion of the renal collecting system or vasculature with cold saline are either ineffective or cumbersome. In this study we assess the application of ice slurry as kidney cooling during laparoscopic partial nephrectomy in the porcine model. This study was performed in collaboration with Argonne National Laboratory.

152

High latitudes present extreme conditions for the measurement and estimation of airsea and ice fluxes, limiting understanding of related physical processes and  

E-Print Network (OSTI)

High latitudes present extreme conditions for the measurement and estimation of air­sea and ice of the Earth's climate. HigH-LatitudE OcEan and SEa icE SurfacE fLuxES: cHaLLEngES fOr cLimatE rESEarcH by Mark change can manifest itself in astonishing ways. Arctic sea ice extent at the end of the melt season

Renfrew, Ian

153

The shallow shelf approximation as a "sliding law" in a thermomechanically coupled ice sheet model  

E-Print Network (OSTI)

The shallow shelf approximation is a better ``sliding law'' for ice sheet modeling than those sliding laws in which basal velocity is a function of driving stress. The shallow shelf approximation as formulated by \\emph{Schoof} [2006a] is well-suited to this use. Our new thermomechanically coupled sliding scheme is based on a plasticity assumption about the strength of the saturated till underlying the ice sheet in which the till yield stress is given by a Mohr-Coulomb formula using a modeled pore water pressure. Using this scheme, our prognostic whole ice sheet model has convincing ice streams. Driving stress is balanced in part by membrane stresses, the model is computable at high spatial resolution in parallel, it is stable with respect to parameter changes, and it produces surface velocities seen in actual ice streams.

Bueler, Ed

2008-01-01T23:59:59.000Z

154

Strongly bonded water monomers on the ice Ih basal plane: Density-functional calculations  

Science Journals Connector (OSTI)

The adsorption of water monomers on noncrystallographic sites of the ice Ih basal plane is calculated from first principles. The results presented here do not support previous theoretical findings that state molecular adsorption energies in excess of the bulk cohesive energy. Still, due to an enhanced strength of the surface hydrogen bonds compared to the bulk, the admolecules are found to lower the ice surface energy. For the surface structures investigated here, the monomer adsorption energies are found to be rather insensitive with respect to the detailed microscopic structure of the underlying substrate. The latter, however, determines the adsorption-induced changes of the surface dipole layer.

C. Thierfelder; A. Hermann; P. Schwerdtfeger; W. G. Schmidt

2006-07-24T23:59:59.000Z

155

Final Report DE-EE0005380- Assessment of Offshore Wind Farm Effects on Sea Surface, Subsurface and Airborne Electronic Systems  

Energy.gov (U.S. Department of Energy (DOE))

Report that assesses possible interference to various kinds of equipment operating in the marine environment where offshore wind farms could be installed.

156

Arctic sea-ice decline archived by multicentury annual-resolution record from crustose coralline algal proxy  

Science Journals Connector (OSTI)

...stratification, and deep water mass formation, among other...winter sea ice via wind-driven anomalies of sea-ice velocity, surface vertical...anomalously high due to wind-driven equatorward...are indicated on the map (Methods). Black circle...three accelerator mass spectrometry (AMS...

Jochen Halfar; Walter H. Adey; Andreas Kronz; Steffen Hetzinger; Evan Edinger; William W. Fitzhugh

2013-01-01T23:59:59.000Z

157

Experimental constraints on the kinetics of ice lens initiation and growth  

Science Journals Connector (OSTI)

Ice lenses are formed by the migration and solidification of unfrozen water during soil freezing, which can lead to the upwards displacement of the ground surface known as frost heave. The complicated interplay between heat and mass transport that causes ice lens formation has been addressed by several theoretical models, but uncertainties remain that require further experimental constraints. In particular, the initiation of ice lenses has long posed theoretical difficulties. We performed a series of stepwise freezing experiments in fine granular materials to observe the initiation and growth of ice lenses. Our experiments demonstrate clear and systematic relationships between the behavior of ice lenses, and the particle size and cooling temperature. Ice lenses are thicker when formed in sediments with smaller particle sizes and the initial formation position is further from the cooled boundary when it is set to lower temperatures. Our temperature measurements and photographic documentation demonstrate that ice lenses are formed below the nominal melting temperature, at a location that is sufficiently distant for the freezing velocity to have slowed below a threshold. We compared our experimental results to numerical predictions of ice lens formation that were applied to our experimental conditions. Our experimental trends are consistent with predictions of our simple, initial model. However, important quantitative differences motivate a refined treatment that emphasizes the kinetics of liquid supply from the pore space through the thin films that separate ice lenses from particle surfaces. We obtained good quantitative agreement between our experimental measurements and the refined model predictions, emphasizing the importance of kinetic effects as a control in ice lens initiation and growth.

Tomotaka Saruya; Kei Kurita; Alan W. Rempel

2013-03-18T23:59:59.000Z

158

Ab initio study of ice catalyzation of HOCl + HCl reaction  

SciTech Connect

The observations by Farman et al. revealed remarkable depletions in the total atmospheric ozone content in Antarctica. The observed total ozone decreased smoothing during the spring season from about 1975. Satellite observations have proved Antarctic ozone depletions over a very extended region, in general agreement with the local ground-based data of Farman et al. It was suggested that heterogeneous reactions occurring on particles in polar stratospheric clouds (PSCs) play a central role in the depletion of stratospheric ozone. Experiments proved that the reaction of HOCl + HCl was very slow in the gas phase, but on ice surface it was rapid. In this work the ice catalysis of HOCl + HCl reaction was investigated by using ab initio molecular orbital theory. The authors applied the Hartree-Fock self-consistent field and the second-order Moeller-Plesset perturbation theory with the basis sets of 6-31G* to the model system. The complexes and transition state were obtained along the reaction with and without the presence of ice surface. By comparing the results, a possible catalyzation mechanism of ice on the reaction is proposed.

Zhou, Y.F.; Liu, C.B.

2000-06-15T23:59:59.000Z

159

Mantle viscosity and ice-age ice sheet topography  

SciTech Connect

Ice-age paleotopography and mantle viscosity can both be inferred from observations of Earth`s response to the most recent deglaciation event of the current ice age. This procedure requires iterative application of a theoretical model of the global process of glacial isostatic adjustment. Results demonstrate that the iterative inversion procedure converges to a paleotopography that is extremely close to that from the ICE-4G model. The accompanying mantle viscosity profile is furthermore shown to reconcile the requirements of aspherical geoid anomalies related to the mantle convection process, thus resolving a fundamental issue concerning mantle rheology. The combined model also explains postglacial sea level histories for the east cost of the United States. 28 refs., 9 figs.

Peltier, W.R. [Univ. of Toronto, Ontario (Canada)

1996-09-06T23:59:59.000Z

160

The IceCube Collaboration:contributions to the 30 th International Cosmic Ray Conference (ICRC 2007),  

SciTech Connect

This paper bundles 40 contributions by the IceCube collaboration that were submitted to the 30th International Cosmic Ray Conference ICRC 2007. The articles cover studies on cosmic rays and atmospheric neutrinos, searches for non-localized, extraterrestrial {nu}{sub e}, {nu}{sub {mu}} and {nu}{sub {tau}} signals, scans for steady and intermittent neutrino point sources, searches for dark matter candidates, magnetic monopoles and other exotic particles, improvements in analysis techniques, as well as future detector extensions. The IceCube observatory will be finalized in 2011 to form a cubic-kilometer ice-Cherenkov detector at the location of the geographic South Pole. At the present state of construction, IceCube consists of 52 paired IceTop surface tanks and 22 IceCube strings with a total of 1426 Digital Optical Modules deployed at depths up to 2350 m. The observatory also integrates the 19 string AMANDA subdetector, that was completed in 2000 and extends IceCube's reach to lower energies. Before the deployment of IceTop, cosmic air showers were registered with the 30 station SPASE-2 surface array. IceCube's low noise Digital Optical Modules are very reliable, show a uniform response and record waveforms of arriving photons that are resolvable with nanosecond precision over a large dynamic range. Data acquisition, reconstruction and simulation software are running in production mode and the analyses, profiting from the improved data quality and increased overall sensitivity, are well under way.

IceCube Collaboration; Ackermann, M.

2007-11-02T23:59:59.000Z

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Ice Energy | Open Energy Information  

Open Energy Info (EERE)

Ice Energy Ice Energy Jump to: navigation, search Logo: Ice Energy Name Ice Energy Address 9351 Eastman Park Drive Place Windsor, Colorado Zip 80550 Sector Renewable energy Product Energy Storage Year founded 2003 Number of employees 51-200 Phone number 970-545-3630 Website http://www.ice-energy.com/ Coordinates 40.4651775°, -104.882° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.4651775,"lon":-104.882,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

162

Physical Controls on Ice Variability in the Bering Sea /  

E-Print Network (OSTI)

region. The model also produces less ice near much of thewinds (Figure 3.13c,d) produce more ice growth and more iceThe model produces variations in total ice area anomalies

Li, Linghan

2013-01-01T23:59:59.000Z

163

ICE Solar | Open Energy Information  

Open Energy Info (EERE)

ICE Solar ICE Solar Jump to: navigation, search Name ICE Solar Place Hyderabad, Andhra Pradesh, India Sector Solar Product India-based company focused on solar PV engineering, procurement and construction opportunities. Coordinates 17.6726°, 77.5971° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":17.6726,"lon":77.5971,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

164

Thermal Storage with Ice Harvesting Systems  

E-Print Network (OSTI)

Application of Harvesting Ice Storage Systems. Thermal storage systems are becoming widely accepted techniques for utility load management. This paper discusses the principles of ice harvesting equipment and their application to the multi...

Knebel, D. E.

1986-01-01T23:59:59.000Z

165

LABORATORY INDENTATION TESTS SIMULATING ICE-STRUCTURE INTERACTIONS USING CONE-SHAPED ICE  

E-Print Network (OSTI)

sample protruding from a steel retaining ring (Figure 1). The closing speed and penetration rate test scenario were ice sample type, ice temperature, interaction rate, penetration depth, cone angle cone angle, indentation rate, ice type and temperature, and indenter roughness were varied. All ice

Bruneau, Steve

166

Sea ice control of water isotope transport to Antarctica and implications for ice core interpretation  

E-Print Network (OSTI)

associated with diabatic heating. The interior deuterium excess response is more strongly affected by sea ice ice and the local conditions may have remote influences [Jacobs and Comiso, 1997; StammerjohnSea ice control of water isotope transport to Antarctica and implications for ice core

Noone, David

167

New study details glacier ice loss following ice shelf July 25, 2011  

E-Print Network (OSTI)

and Ted #12;Scambos of the NSIDC produced detailed ice loss maps from 2001 to 2009 for the main tributaryNew study details glacier ice loss following ice shelf collapse July 25, 2011 Contact: Anthony Lane UMBC (410) 455-5793 alane@umbc.edu Katherine Leitzell National Snow and Ice Data Center University

Cambridge, University of

168

Numerical Age Computation of the Antarctic Ice Sheet for Dating Deep Ice Cores  

E-Print Network (OSTI)

Numerical Age Computation of the Antarctic Ice Sheet for Dating Deep Ice Cores Bernd M¨ugge1 for the computation of the age of ice is discussed within the frame of numerical ice sheet modelling. The first method of a numerical diffusion term to stabilize the solution and therefore produces arbitrary results in a near

Calov, Reinhard

169

Gas isotopes in ice reveal a vegetated central Greenland during ice sheet invasion  

E-Print Network (OSTI)

= ) in the silty ice, reaching values as high as 22 mM [Tison et al., 1998]. Ammonium oxalate is produced duringGas isotopes in ice reveal a vegetated central Greenland during ice sheet invasion R. Souchez,1 J prevailing during build-up of the Greenland Ice Sheet (GIS) are not yet established. Here we use results from

Chappellaz, Jérôme

170

AMSR-E Algorithm Theoretical Basis Document: Sea Ice Products  

E-Print Network (OSTI)

the Arctic perennial ice regions, and the ice temperature is produced from an algorithm similar to the Nimbus1 AMSR-E Algorithm Theoretical Basis Document: Sea Ice Products Thorsten Markus and Donald J 20771 1. Overview The AMSR-E sea ice standard level 3 products include sea ice concentration, sea ice

Waliser, Duane E.

171

Global Distribution of Ice Cloud Particle Shape and Roughness from PARASOL Satellite Measurements  

E-Print Network (OSTI)

reflected back to space by a factor of two (Baran 2012; Ulanowski et al. 2006). Particle shape can also have a large impact on the radiative properties and can influence the cloud radiative forcing. To reduce these uncertainties and deliver more accurate... rosettes, plates, and columns. Surface roughness has been observed in laboratory measurements of ice and in field campaigns (Baran et al. 2011; Ulanowski et al. 2006). Thermodynamic conditions influence whether an ice particle is roughened and how...

Cole, Benjamin

2013-07-29T23:59:59.000Z

172

Real-time processing of remote sensor data as applied to Arctic ice classification  

E-Print Network (OSTI)

as an earth observations system [4]; remote sensor measurements (radar measurements) from an environmental situation (the Arctic surface) are processed and analyzed at a real-time rate to yield a usable output data product (ice statistics) which in turn...REAL-TIME PROCESSING OF REMOTE SENSOR DATA AS APPLIED TO ARCTIC ICE CLASSIFICATION A Thesis by JAMES AUSTIN PERMENTER partial ! Submitted to the Graduate College of Texas A)M University in fulfillment of the requirement for the degree...

Permenter, James Austin

1973-01-01T23:59:59.000Z

173

Fire and Ice Issue 6  

E-Print Network (OSTI)

9#HDIQNV3>IM ".: FIRE AND ICE VI Available from: Kathleen Resch PO Box 1766 Temple City, CA 91780 October, 2000 by Kathleen Resch for the contributors. No reprints or reproduction without the written permission of the author.../artist. This is an amateur publication and is not intended to infringe upon the rights ofTerry Nation, BBC-TV or any others. FIRE AND ICE VI 1 Table of Contents A DANGEROUS CONCEPT by Nova 1 A FRIEND IN NEED... by Julia Stamford 14 ...IS A FRIEND INDEED by Julia Stamford 19...

Multiple Contributors

2000-01-01T23:59:59.000Z

174

Fire and Ice Issue 3  

E-Print Network (OSTI)

,fpl ^1 FIRE AND ICE Available from: Kathleen Resch PO Box 1766 Temple City,CA 91780 III May, 1995 by Kathleen Resch for the contributors. No reprints or reproduction without the written permission of the author/artist. This is an amateur... publication and is not intended to infringe upon the rightsof "Blake's 7" copyright holders.. FIRE AND ICE TABLE OF CONTENTS THE GIFT by Pat Terra 1 "innerspace" by Pat Terra 24 WILD, BEAUTIFUL AND DAMNED by Gemini 25 SET THE NIGHT ON FIRE by Riley Cannon 40...

Multiple Contributors

1995-01-01T23:59:59.000Z

175

Paleotopography of glacial-age ice sheets  

SciTech Connect

This is technical comment and response to the subject of paleotophography of glacial age ice sheets. The model presented by Peltier reconstructing the paleotopography of glacial age ice sheets has implications for atmospheric general circulation models of ice age climate. In addition, the model suggests that the glacial-age Antarctic Ice Sheet was significantly larger than today`s. The commentor, Edwards, suggests there is a discrepancy between data from Papua New Guinea and the model results.

Edwards, R.L. [Univ. of Minnesota, Minneapolis, MN (United States)

1995-01-27T23:59:59.000Z

176

Coherent radar ice thickness measurements over the Greenland ice sheet  

E-Print Network (OSTI)

systems are designed to use pulse compression techniques and coherent integration to obtain the high sensitivity required to measure the thickness of more than 4 km of cold ice. We used these systems to collect radar data over the interior and margins...

Gogineni, S. Prasad; Tammana, Dilip; Braaten, David A.; Leuschen, C.; Legarsky, J.; Kanagaratnam, P.; Stiles, J.; Allen, C.; Jezek, K.; Akins, T.

2001-12-27T23:59:59.000Z

177

Ice-Sheet Response to Oceanic Forcing  

Science Journals Connector (OSTI)

...regional-scale ice-ocean simulations suggests that the state-of-Texas...ice shelfs rapid demise, which would...providing accurate simulation and projection of...observation and modeling indicate that increases...day (38, 39). Rapid melting of ice cliffs...with an emphasis on automated and smart-sensing...

Ian Joughin; Richard B. Alley; David M. Holland

2012-11-30T23:59:59.000Z

178

THERMOFLUID OPTIMIZATION OF A HEATED HELICOPTER ENGINE COOLING BAY SURFACE  

E-Print Network (OSTI)

effectiveness of an aircraft de-icing strategy by re-designing the cooling bay surface shape. The design of a helicopter cooling bay can be ice prone under certain atmospheric conditions. Its effective shape design1 THERMOFLUID OPTIMIZATION OF A HEATED HELICOPTER ENGINE COOLING BAY SURFACE D. Wang 1 , G. F

Wang, Gaofeng Gary

179

The Relative Importance of Clouds and Sea Ice for the Solar Energy Budget of the Southern Ocean  

Science Journals Connector (OSTI)

The effects of clouds and sea ice on the solar radiation budget are determined for the Southern Ocean around Antarctica between latitudes 50 and 80S. Distributions of cloud optical depth are used, together with distributions of surface albedo, ...

Melanie F. Fitzpatrick; Stephen G. Warren

2007-03-01T23:59:59.000Z

180

Subglacial floods beneath ice sheets  

Science Journals Connector (OSTI)

...depth 100m subject to a geothermal heat flux of 50m2 gives...crude estimate). As well as the present theoretical...Atlantic or to the Gulf of Mexico. One reason for supposing...do not know this very well for a palaeo-ice sheet...and P Gogineni2001High geothermal flow, basal melt, and...

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

First-Principles Assessment of H[subscript 2]S and H[subscript 2]O Reaction Mechanisms and the Subsequent Hydrogen Absorption on the CeO[subscript 2](111) Surface  

E-Print Network (OSTI)

The main goal of this study is to assess the resistance of ceria against hydrogen penetration into its bulk, in the context of its application as a protective surface coating against hydrogen embrittlement in metals. We ...

Marrocchelli, Dario

182

On the applicability of the Heliosat-2 method to assess surface solar irradiance in the Intertropical Convergence Zone,  

E-Print Network (OSTI)

-3027" DOI : 10.1080/01431161.2012.756598 #12;2 energy systems for heating and electrical power generation, high temporal and spatial resolution data for mid- and long-term energy planning are needed. Hourly on the Earth's surface and its geographical distribution is of prime importance for numerous solar

Paris-Sud XI, Université de

183

The IceCube data acquisition system: Signal capture, digitization,and timestamping  

SciTech Connect

IceCube is a km-scale neutrino observatory under construction at the South Pole with sensors both in the deep ice (InIce) and on the surface (IceTop). The sensors, called Digital Optical Modules (DOMs), detect, digitize and timestamp the signals from optical Cherenkov-radiation photons. The DOM Main Board (MB) data acquisition subsystem is connected to the central DAQ in the IceCube Laboratory (ICL) by a single twisted copper wire-pair and transmits packetized data on demand. Time calibration ismaintained throughout the array by regular transmission to the DOMs of precisely timed analog signals, synchronized to a central GPS-disciplined clock. The design goals and consequent features, functional capabilities, and initial performance of the DOM MB, and the operation of a combined array of DOMs as a system, are described here. Experience with the first InIce strings and the IceTop stations indicates that the system design and performance goals have been achieved.

The IceCube Collaboration; Matis, Howard

2009-03-02T23:59:59.000Z

184

Assessment of near-surface dissolution at and near the Waste Isolation Pilot Plant (WIPP), southeastern New Mexico  

SciTech Connect

The area at and near the WIPP site was examined for evidence of karst development on the geomorphic surface encompassing the site. Certain surficial depressions of initial concern were identified as blowouts in sand dune fields (shallow features unrelated to karstification). An ancient stream system active more than 500,000 yr ago contained more water than any system since. During that time (Gatuna, Middle Pleistocene), many karst features such as Clayton Basin and Nash Draw began to form in the region. Halite was probably dissolved from parts of the Rustler Formation at that time. Dissolution of halite and gypsum from intervals encountered in Borehole WIPP-33 west of the WIPP site occurred during later Pleistocene time (i.e., <450,000 yr ago). However, there is no evidence of active near-surface dissolution within a belt to the east of WIPP-33 in the vicinity of the WIPP shaft. 26 refs., 11 figs., 1 tab.

Bachman, G.O.

1985-07-01T23:59:59.000Z

185

New ice rules for nanoconfined monolayer ice from first principles  

E-Print Network (OSTI)

Understanding the structural tendencies of nanoconfined water is of great interest for nanoscience and biology, where nano/micro-sized objects may be separated by very few layers of water. Here we investigate the properties of ice confined to a quasi-2D monolayer by a featureless, chemically neutral potential, using density-functional theory simulations with a non-local van der Waals density functional. An ab initio random structure search reveals all the energetically competitive monolayer configurations to belong to only two of the previously-identified families, characterized by a square or honeycomb hydrogen-bonding network, respectively. From an in-depth analysis we show that the well-known ice rules for bulk ice need to be revised for the monolayer, with distinct new rules appearing for the two networks. All identified stable phases for both are found to be non-polar (but with a topologically non-trivial texture for the square) and, hence, non-ferroelectric, in contrast to the predictions of empirical f...

Corsetti, Fabiano; Artacho, Emilio

2015-01-01T23:59:59.000Z

186

The Design and Performance of IceCube DeepCore  

E-Print Network (OSTI)

The IceCube neutrino observatory in operation at the South Pole, Antarctica, comprises three distinct components: a large buried array for ultrahigh energy neutrino detection, a surface air shower array, and a new buried component called DeepCore. DeepCore was designed to lower the IceCube neutrino energy threshold by over an order of magnitude, to energies as low as about 10 GeV. DeepCore is situated primarily 2100 m below the surface of the icecap at the South Pole, at the bottom center of the existing IceCube array, and began taking physics data in May 2010. Its location takes advantage of the exceptionally clear ice at those depths and allows it to use the surrounding IceCube detector as a highly efficient active veto against the principal background of downward-going muons produced in cosmic-ray air showers. DeepCore has a module density roughly five times higher than that of the standard IceCube array, and uses photomultiplier tubes with a new photocathode featuring a quantum efficiency about 35% higher...

,

2011-01-01T23:59:59.000Z

187

Hydrogen ICE Vehicle Testing Activities  

SciTech Connect

The Advanced Vehicle Testing Activity teamed with Electric Transportation Applications and Arizona Public Service to develop and monitor the operations of the APS Alternative Fuel (Hydrogen) Pilot Plant. The Pilot Plant provides 100% hydrogen, and hydrogen and compressed natural gas (H/CNG)-blended fuels for the evaluation of hydrogen and H/CNG internal combustion engine (ICE) vehicles in controlled and fleet testing environments. Since June 2002, twenty hydrogen and H/CNG vehicles have accumulated 300,000 test miles and 5,700 fueling events. The AVTA is part of the Department of Energys FreedomCAR and Vehicle Technologies Program. These testing activities are managed by the Idaho National Laboratory. This paper discusses the Pilot Plant design and monitoring, and hydrogen ICE vehicle testing methods and results.

J. Francfort; D. Karner

2006-04-01T23:59:59.000Z

188

Tracer transport in the Greenland Ice Sheet: constraints on ice cores and glacial history  

Science Journals Connector (OSTI)

The climate history and dynamics of the Greenland Ice Sheet are studied using a coupled model of the depositional provenance and transport of glacier ice, allowing simultaneous prediction of the detailed isotopic stratigraphy of ice cores at all the major Greenland sites. Adopting a novel method for reconstructing the agedepth relationship, we greatly improve the accuracy of semi-Lagrangian tracer tracking schemes and can readily incorporate an age-dependent ice rheology. The larger aim of our study is to impose new constraints on the glacial history of the Greenland Ice Sheet. Leading sources of uncertainty in the climate and dynamic history are encapsulated in a small number of parameters: the temperature and elevation isotopic sensitivities, the glacialinterglacial precipitation contrast and the effective viscosity of ice in the flow law. Comparing predicted and observed ice layering at ice core sites, we establish plausible ranges for the key model parameters, identify climate and dynamic histories that are mutually consistent and recover the past depositional elevation of ice cores to ease interpretation of their climatic records. With the coupled three-dimensional model of ice dynamics and provenance transport we propose a method to place all the ice core records on a common time scale and use discrepancies to adjust the reconstructed climate history. Analysis of simulated GRIP ice layering and borehole temperature profiles confirms that the GRIP record is sensitive to the dynamic as well as to the climatic history, but not enough to strongly limit speculation on the state of the Greenland Ice Sheet during the Eemian. In contrast, our study indicates that the Dye 3 and Camp Century ice cores are extremely sensitive to ice dynamics and greatly constrain Eemian ice sheet reconstructions. We suggest that the maximum Eemian sea-level contribution of the ice sheet was in the range of 3.54.5m.

Nicolas Lhomme; Garry K.C. Clarke; Shawn J. Marshall

2005-01-01T23:59:59.000Z

189

FAFCO Ice Storage test report  

SciTech Connect

The Ice Storage Test Facility (ISTF) is designed to test commercial ice storage systems. FAFCO provided a storage tank equipped with coils designed for use with a secondary fluid system. The FAFCO ice storage system was tested over a wide range of operating conditions. Measured system performance during charging showed the ability to freeze the tank fully, storing from 150 to 200 ton-h. However, the charging rate showed significant variations during the latter portion of the charge cycle. During discharge cycles, the storage tank outlet temperature was strongly affected by the discharge rate and tank state of charge. The discharge capacity was dependent upon both the selected discharge rate and maximum allowable tank outlet temperature. Based on these tests, storage tank selection must depend on both charge and discharge conditions. This report describes FAFCO system performance fully under both charging and discharging conditions. While the test results reported here are accurate for the prototype 1990 FAFCO Model 200, currently available FAFCO models incorporate significant design enhancements beyond the Model 200. At least one major modification was instituted as a direct result of the ISTF tests. Such design improvements were one of EPRI`s primary goals in founding the ISTF.

Stovall, T.K.

1993-11-01T23:59:59.000Z

190

Proton Ordering of Cubic Ice Ic: Spectroscopy and Computer Simulations  

E-Print Network (OSTI)

by producing rotational Bjerrum L-defects.1 Ambient-pressure hexagonal ice, ice Ih, shows the lowest produced from ice Ih using hydroxide doping, for example, by freezing a 0.1 M KOH solution. Because ice IhProton Ordering of Cubic Ice Ic: Spectroscopy and Computer Simulations Philipp Geiger, Christoph

Dellago, Christoph

191

Probabilistic ecological risk assessment and source apportionment of polycyclic aromatic hydrocarbons in surface sediments from Yellow Sea  

SciTech Connect

Based on the concentrations of polycyclic aromatic hydrocarbons (PAHs) in 12 surface sediment samples from Yellow Sea, the relative risk of 9 PAHs was investigated using joint risk probability distribution curves and overlapping area, which were generated based on the distributions of exposure and acute toxicity data (LC50), and the sources of PAHs were apportioned using principal component analysis. It was found that joint probability curve and overlapping area indicated the acceptable ecological risk of individual PAHs, only a small fraction of the benthic organisms was affected. Among the nine PAHs studied, the overall risk of pyrene was the highest, with that of naphthalene the lowest. For lower exposure levels at which the percentage of species affected was less than 10%, the risk associated with phenanthrene and fluorene were clearly higher than that of the other seven PAHs. It was indicated that PAHs in surface sediments mainly originated from vehicular emissions, coal combustion sources, coke oven emission and wood combustion, petroleum origin made little influence on sources of PAHs by PCA.

Liu, A.X.; Lang, Y.H.; Xue, L.D.; Liao, S.L.; Zhou, H. [Ocean University of China, Qingdao (China). College for Environmental Science & Engineering

2009-11-15T23:59:59.000Z

192

Can xenon in water inhibit ice growth? Molecular dynamics of phase transitions in water$-$Xe system  

E-Print Network (OSTI)

Motivated by recent experiments showing the promise of noble gases as cryoprotectants, we perform molecular dynamics modeling of phase transitions in water with xenon under cooling. We study the structure and dynamics of xenon water solution as a function of temperature. Homogeneous nucleation of clathrate hydrate phase is observed and characterized. As the temperature is further reduced we observe hints of dissociation of clathrate due to stronger hydrophobic hydration, pointing towards a possible instability of clathrate at cryogenic temperatures and conversion to an amorphous phase comprised of "xenon + hydration shell" Xe$\\cdot$(H$_{2}$O)$_{21.5}$ clusters. Simulations of ice$-$xenon solution interface in equilibrium and during ice growth reveal the effects of xenon on the ice$-$liquid interface, where adsorbed xenon causes roughening of ice surface but does not preferentially form clathrate. These results provide evidence against the ice-blocker mechanism of xenon cryoprotection.

Vasilii I. Artyukhov; Alexander Yu. Pulver; Alex Peregudov; Igor Artyuhov

2014-07-11T23:59:59.000Z

193

Climate, Ocean and Sea Ice Modeling (COSIM)  

NLE Websites -- All DOE Office Websites (Extended Search)

Earth, Space Sciences » Earth, Space Sciences » Climate, Ocean and Sea Ice Modeling (COSIM) Climate, Ocean and Sea Ice Modeling (COSIM) The COSIM project develops advanced ocean and ice models for evaluating the role of ocean and ice in high-latitude climate change and projecting the impacts of high-latitude change on regions throughout the globe. Get Expertise Phil Jones COSIM Email Matthew Hecht COSIM Email Elizabeth Hunke COSIM Email Mat Maltrud COSIM Email Bill Lipscomb COSIM Email Scott Elliott COSIM Email Todd Ringler COSIM Email We are also developing a set of next-generation ocean and ice models with variable resolution horizontal grids to focus resolution on regions of interest or regions where specific processes (like eddies) need to be resolved. Summary The COSIM project develops advanced ocean and ice models for evaluating the

194

Historical Antarctic mean sea ice area, sea ice trends, and winds in CMIP5 simulations  

E-Print Network (OSTI)

In contrast to Arctic sea ice, average Antarctic sea ice area is not retreating but has slowly increased since satellite measurements began in 1979. While most climate models from the Coupled Model Intercomparison Project ...

Mahlstein, Irina

195

Neglecting ice-atmosphere interactions underestimates ice sheet melt in millennial-scale deglaciation simulations  

E-Print Network (OSTI)

produce an interactive coupled integration: Atmospheric dynamics were equilibrated to an initial iceconstant ice albedos. None of these cases is able to produceproduce substantial deglaciation on a realistic timescale is attributed to the use of temporally invariant ice

Pritchard, M. S.; Bush, A. B.; Marshall, S. J.

2008-01-01T23:59:59.000Z

196

IceT users' guide and reference.  

SciTech Connect

The Image Composition Engine for Tiles (IceT) is a high-performance sort-last parallel rendering library. In addition to providing accelerated rendering for a standard display, IceT provides the unique ability to generate images for tiled displays. The overall resolution of the display may be several times larger than any viewport that may be rendered by a single machine. This document is an overview of the user interface to IceT.

Moreland, Kenneth D.

2009-06-01T23:59:59.000Z

197

IceT users' guide and reference.  

SciTech Connect

The Image Composition Engine for Tiles (IceT) is a high-performance sort-last parallel rendering library. In addition to providing accelerated rendering for a standard display, IceT provides the unique ability to generate images for tiled displays. The overall resolution of the display may be several times larger than any viewport that may be rendered by a single machine. This document is an overview of the user interface to IceT.

Moreland, Kenneth D.

2011-01-01T23:59:59.000Z

198

Title: Aerodynamic and Scalar Roughness over Snow and Sea Ice In Monin-Obukhov similarity theory, the aerodynamic roughness, z0, is the artificial height  

E-Print Network (OSTI)

Title: Aerodynamic and Scalar Roughness over Snow and Sea Ice Abstract: In Monin-Obukhov similarity theory, the aerodynamic roughness, z0, is the artificial height above the surface at which the wind speed the theory and measurement of the aerodynamic and scalar roughness lengths over snow and sea ice. The data

199

Benchmarking the x-ray phase contrast imaging for ICF DT ice characterization using roughened surrogates  

SciTech Connect

We use x-ray phase contrast imaging to characterize the inner surface roughness of DT ice layers in capsules planned for future ignition experiments. It is therefore important to quantify how well the x-ray data correlates with the actual ice roughness. We benchmarked the accuracy of our system using surrogates with fabricated roughness characterized with high precision standard techniques. Cylindrical artifacts with azimuthally uniform sinusoidal perturbations with 100 um period and 1 um amplitude demonstrated 0.02 um accuracy limited by the resolution of the imager and the source size of our phase contrast system. Spherical surrogates with random roughness close to that required for the DT ice for a successful ignition experiment were used to correlate the actual surface roughness to that obtained from the x-ray measurements. When comparing average power spectra of individual measurements, the accuracy mode number limits of the x-ray phase contrast system benchmarked against surface characterization performed by Atomic Force Microscopy are 60 and 90 for surrogates smoother and rougher than the required roughness for the ice. These agreement mode number limits are >100 when comparing matching individual measurements. We will discuss the implications for interpreting DT ice roughness data derived from phase-contrast x-ray imaging.

Dewald, E; Kozioziemski, B; Moody, J; Koch, J; Mapoles, E; Montesanti, R; Youngblood, K; Letts, S; Nikroo, A; Sater, J; Atherton, J

2008-06-26T23:59:59.000Z

200

A ``triple sea-ice state'' mechanism for the abrupt warming and synchronous ice sheet collapses during Heinrich events  

E-Print Network (OSTI)

the strong sea ice albedo and insulating feedbacks. Such abrupt sea ice changes can also account was trapped at the base of the ice sheet due to the thick and insulating glacier that prevented it fromA ``triple sea-ice state'' mechanism for the abrupt warming and synchronous ice sheet collapses

Tziperman, Eli

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Relationships between Water Wettability and Ice Adhesion  

E-Print Network (OSTI)

Ice formation and accretion may hinder the operation of many systems critical to national infrastructure, including airplanes, power lines, windmills, ships, and telecommunications equipment. Yet despite the pervasiveness ...

Meuler, Adam J.

202

The convective desalination of sea ice  

E-Print Network (OSTI)

containing both liquid brine and solid (pure water) ice. Frad is the flux of penetrating solar radiation. Thus the thermal properties of sea ice are composed of those of the solid and liquid phases that make up sea ice. Fixed-salinity models used in older... components of the physical climate system. Evolving in space and time, sea ice has thermal and mechanical properties that must be updated dynamically for a faithful representation within climate models. Such models are vital tools to help people everywhere...

Rees Jones, David

2014-07-01T23:59:59.000Z

203

Ice Formation in Gas-Diffusion Layers  

E-Print Network (OSTI)

porous media does not exist. Once the fundamentals of iceFundamental Issues in Subzero PEMFC Startup and Operation. UTC Fuel Cells, DOE

Dursch, Thomas

2013-01-01T23:59:59.000Z

204

City of Eagan ?Civic Ice Arena Renovation  

Energy.gov (U.S. Department of Energy (DOE))

Project objectives: Provide a reliable central ice making and heating system that meets the performance requirements of the owner. Reduce operation and maintenance costs.

205

The last Scandinavian Ice Sheet in northwestern Russia: ice flow patterns and decay dynamics  

E-Print Network (OSTI)

U N C O R R EC TED PR O O F The last Scandinavian Ice Sheet in northwestern Russia: ice flow Sheet in northwestern Russia: ice flow patterns and decay dynamics. Boreas, Vol. 35, pp. xxxÁxxx. Oslo) in northwestern Russia took place after a period of periglacial conditions. Till of the last SIS, Bobrovo till

Ingólfsson, ?lafur

206

Predicting Land-Ice Retreat and Sea-Level Rise with the Community Earth System Model  

SciTech Connect

Coastal stakeholders need defensible predictions of 21st century sea-level rise (SLR). IPCC assessments suggest 21st century SLR of {approx}0.5 m under aggressive emission scenarios. Semi-empirical models project SLR of {approx}1 m or more by 2100. Although some sea-level contributions are fairly well constrained by models, others are highly uncertain. Recent studies suggest a potential large contribution ({approx}0.5 m/century) from the marine-based West Antarctic Ice Sheet, linked to changes in Southern Ocean wind stress. To assess the likelihood of fast retreat of marine ice sheets, we need coupled ice-sheet/ocean models that do not yet exist (but are well under way). CESM is uniquely positioned to provide integrated, physics based sea-level predictions.

Lipscomb, William [Los Alamos National Laboratory

2012-06-19T23:59:59.000Z

207

Environmental impact of APC residues from municipal solid waste incineration: Reuse assessment based on soil and surface water protection criteria  

SciTech Connect

Highlights: > The Dutch Building Material Decree (BMD) was used to APC residues from MSWI. > BMD is a straightforward tool to calculate expectable loads to the environment of common pollutants. > Chloride load to the environment lead to classification of building material not allowed. > At least a pre-treatment (e.g. washing) is required in order to remove soluble salts. > The stabilization with phosphates or silicates eliminate the problem of heavy metals. - Abstract: Waste management and environmental protection are mandatory requirements of modern society. In our study, air pollution control (APC) residues from municipal solid waste incinerators (MSWI) were considered as a mixture of fly ash and fine particulate solids collected in scrubbers and fabric filters. These are hazardous wastes and require treatment before landfill. Although there are a number of treatment options, it is highly recommended to find practical applications rather than just dump them in landfill sites. In general, for using a construction material, beyond technical specifications also soil and surface water criteria may be used to ensure environmental protection. The Dutch Building Materials Decree (BMD) is a valuable tool in this respect and it was used to investigate which properties do not meet the threshold criteria so that APC residues can be further used as secondary building material. To this end, some scenarios were evaluated by considering release of inorganic species from unmoulded and moulded applications. The main conclusion is that the high amount of soluble salts makes the APC residues a building material prohibited in any of the conditions tested. In case of moulding materials, the limits of heavy metals are complied, and their use in Category 1 would be allowed. However, also in this case, the soluble salts lead to the classification of 'building material not allowed'. The treatments with phosphates or silicates are able to solve the problem of heavy metals, but difficulties with the soluble salts are still observed. This analysis suggests that for APC residues to comply with soil and surface water protection criteria to be further used as building material at least a pre-treating for removing soluble salts is absolutely required.

Quina, Margarida J., E-mail: guida@eq.uc.pt [Research Centre on Chemical Processes Engineering and Forest Products, Department of Chemical Engineering, University of Coimbra, Rua Silvio Lima, 3030-790 Coimbra (Portugal); Bordado, Joao C.M. [Department of Chemical and Biological Engineering, IBB, Instituto Superior Tecnico, Av. Rovisco Pais, 1049-001 Lisboa (Portugal); Quinta-Ferreira, Rosa M. [Research Centre on Chemical Processes Engineering and Forest Products, Department of Chemical Engineering, University of Coimbra, Rua Silvio Lima, 3030-790 Coimbra (Portugal)

2011-09-15T23:59:59.000Z

208

ARKTOS: An intelligent system for SAR sea ice image classification  

E-Print Network (OSTI)

We present an intelligent system for satellite sea ice image analysis named Advanced Reasoning using Knowledge for T ping Of Sea ice (ARKTOS). ARKTOS performs fully automated analysis of synthetic aperture radar (SAR) sea ice images by mimicking...

Soh, L. K.; Tsatsoulis, Costas; Gineris, D.; Bertoia, C.

2004-01-01T23:59:59.000Z

209

Greenland Ice Sheet "Sliding" a Small Contributor to Future Sea...  

Office of Science (SC) Website

(ice2sea manuscript no. 121). ElmerIce simulations were performed using high-performance computing resources from Grand quipement National de Calcul Intensif - Centre...

210

Hail Ice Damage of Stringer-Stiffened Curved Composite Panels /  

E-Print Network (OSTI)

of projectile SHI. Thus, the ice produces a more large-areaproduce uneven pressure/forces being applied onto the ice

Le, Jacqueline Linh

2013-01-01T23:59:59.000Z

211

SciTech Connect: optimal initial conditions for coupling ice...  

Office of Scientific and Technical Information (OSTI)

Conference: optimal initial conditions for coupling ice sheet models to earth system models Citation Details In-Document Search Title: optimal initial conditions for coupling ice...

212

Effects of ice cover on sediment resuspension and phosphorus ...  

Science Journals Connector (OSTI)

Since ice coverage increased shear resistance, climate-driven absence or shortening of ice-cover would reduce the period for settling of particles and their...

213

ARM - PI Product - Large Scale Ice Water Path and 3-D Ice Water Content  

NLE Websites -- All DOE Office Websites (Extended Search)

ProductsLarge Scale Ice Water Path and 3-D Ice Water ProductsLarge Scale Ice Water Path and 3-D Ice Water Content Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send PI Product : Large Scale Ice Water Path and 3-D Ice Water Content Site(s) SGP TWP General Description Cloud ice water concentration is one of the most important, yet poorly observed, cloud properties. Developing physical parameterizations used in general circulation models through single-column modeling is one of the key foci of the ARM program. In addition to the vertical profiles of temperature, water vapor and condensed water at the model grids, large-scale horizontal advective tendencies of these variables are also required as forcing terms in the single-column models. Observed horizontal advection of condensed water has not been available because the

214

The influence of ice nucleation mode and ice vapor growth on simulation of  

NLE Websites -- All DOE Office Websites (Extended Search)

The influence of ice nucleation mode and ice vapor growth on simulation of The influence of ice nucleation mode and ice vapor growth on simulation of arctic mixed-phase clouds Avramov, Alexander The Pennsylvania State University Category: Modeling Mixed-phase arctic stratus clouds are the predominant cloud type in the Arctic . Perhaps one of the most intriguing of their features is that they tend to have liquid tops that precipitate ice. Despite the fact that this situation is colloidally unstable, these cloud systems are quite long lived - from a few days to over a couple of weeks. Previous studies have suggested that this longevity may be due to a paucity of ice nucleating aerosols (ice nuclei, or IN) in the Arctic. Such studies have shown that small changes in IN concentrations can cause large changes in the amount of liquid water within a mixed-phase stratus deck. We use the Regional

215

6, 20592090, 2006 Ice nucleation in  

E-Print Network (OSTI)

intermediate solubility and melting temperatures) nucleated ice at the same temperature as aqueous sulfuric Discussions Ice nucleation in sulfuric acid/organic aerosols: implications for cirrus cloud formation M. R. Beaver1 , M. J. Elrod2 , R. M. Garland1 , and M. A. Tolbert1 1 Department of Chemistry and Biochemistry

Boyer, Edmond

216

Ocean and Sea Ice SAF Technical Note  

E-Print Network (OSTI)

Ocean and Sea Ice SAF Technical Note SAF/OSI/CDOP/KNMI/TEC/RP/147 Validation of ASCAT 12.5-km winds The Ocean and Sea Ice Satellite Application Facility (OSI SAF) delivers an operational level 2 wind product produces a level 1 product with 12.5-km WVC spacing that has a resolution of approximately 25 km. Since

Stoffelen, Ad

217

Ocean and Sea Ice SAF Technical Note  

E-Print Network (OSTI)

Ocean and Sea Ice SAF Technical Note SAF/OSI/CDOP2/KNMI/TEC/RP/194 Quality Control of Ku. The OSCAT level 2a data are available in near-real time and OWDP is used at KNMI to produce the Ocean and Sea Ice (OSI) SAF wind product which is made available to users. A beta version of OWDP is also

Stoffelen, Ad

218

Largest Ice-Bank Promotes Load Management  

E-Print Network (OSTI)

California's largest ice-bank storage system is an example of how thermal storage can be applied to both new and existing buildings. At the Union Oil Company in Brea, California, one massive ice-storage system satisfies the air conditioning needs...

Brarmann, G. L.

1983-01-01T23:59:59.000Z

219

Stability of ice-sheet grounding lines  

Science Journals Connector (OSTI)

...81 73 Stability of ice-sheet grounding lines Richard F. Katz 1 * M. Grae Worster 2...ice sheets are sensitive to grounding-line position and variation, characteristics...models. We present a theory for grounding-line dynamics in three spatial dimensions and...

2010-01-01T23:59:59.000Z

220

E-Print Network 3.0 - anti-icing Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Used Unserviceable No de-ice, anti-ice or related 73 - - - Wing tail... De-icing boots - 10 3 0 Wing tail bleed-air anti-ice - 3 0 0 Wing tail electric anti-ice - 2 0...

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Fire in the Ice, Winter 2005  

NLE Websites -- All DOE Office Websites (Extended Search)

Understanding Methane Understanding Methane Hydrate Behavior .................... 1 Quantitative Assessment of Marine Gas Hydrates ............. 5 New Method for Gas Hydrate Production .............................. 8 Announcements .................. 12 * International Workshop * Chiba, Hedberg Abstracts * Chemists Highlight Hydrates * NETL Solicits Proposals * IODP Planning Two Cruises * Gulf of Mexico Expedition * TOUGH-Fx Training Offered Spotlight on Research ........ 16 Dr. Frank R. Rack CONTACT POINT Ray Boswell National Energy Technology Laboratory (304) 285-4541 (304) 285-4216 fax Ray.Boswell@netl.doe.gov The Fire in the Ice Newsletter is also available online at our website www.netl.doe.gov/scngo/ Natural%20Gas/hydrates T H E N A T I O N A L E N E R G Y T E C H N O L O G Y L A B O R A T O R Y M E T H A N E H Y D R A T E N E W S L E T T E R Vol. 5, Iss. 1

222

The microstructure of polar ice. Part I: Highlights from ice core research  

Science Journals Connector (OSTI)

Abstract Polar ice sheets play a fundamental role in Earth's climate system, by interacting actively and passively with the environment. Active interactions include the creeping flow of ice and its effects on polar geomorphology, global sea level, ocean and atmospheric circulation, and so on. Passive interactions are mainly established by the formation of climate records within the ice, in form of air bubbles, dust particles, salt microinclusions and other derivatives of airborne impurities buried by recurrent snowfalls. For a half-century scientists have been drilling deep ice cores in Antarctica and Greenland for studying such records, which can go back to around a million years. Experience shows, however, that the ice-sheet flow generally disrupts the stratigraphy of the bottom part of deep ice cores, destroying the integrity of the oldest records. For all these reasons glaciologists have been studying the microstructure of polar ice cores for decades, in order to understand the genesis and fate of ice-core climate records, as well as to learn more about the physical properties of polar ice, aiming at better climate-record interpretations and ever more precise models of ice-sheet dynamics. In this Part I we review the main difficulties and advances in deep ice core drilling in Antarctica and Greenland, together with the major contributions of deep ice coring to the research on natural ice microstructures. In particular, we discuss in detail the microstructural findings from Camp Century, Byrd, Dye 3, GRIP, GISP2, NorthGRIP, Vostok, Dome C, EDML, and Dome Fuji, besides commenting also on the earlier results of some pioneering ventures, like the Jungfraujoch Expedition and the NorwegianBritishSwedish Antarctic Expedition, among others. In the companion Part II of this work (Faria etal., 2014), the review proceeds with a survey of the state-of-the-art understanding of natural ice microstructures and some exciting prospects in this field of research.

Srgio H. Faria; Ilka Weikusat; Nobuhiko Azuma

2014-01-01T23:59:59.000Z

223

ICE CORE RECORDS | Greenland Stable Isotopes  

Science Journals Connector (OSTI)

Abstract Greenland ice cores contain a wealth of information on past climatic conditions throughout the Northern Hemisphere. A historical perspective on the climatic interpretation of stable isotopes in water and ice is presented in the introduction, while the remainder of the article is devoted to the current interpretation of stable isotope data from Greenland ice cores. The progress in our understanding of stable isotope signals, on timescales from seasons to glacial cycles, is discussed and evaluated through numerous examples from Greenland ice cores. Stable isotope profiles from the Camp Century, Dye-3, GISP2, GRIP, NGRIP, and Renland deep ice cores are emphasized, as they all provide climatic information dating back into the Eemian period.

B.M. Vinther; S.J. Johnsen

2013-01-01T23:59:59.000Z

224

Energy Cost Calculator for Commercial Ice Machines | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Ice Machines Ice Machines Energy Cost Calculator for Commercial Ice Machines October 8, 2013 - 2:25pm Addthis Vary capacity size, energy cost, hours of operation, and /or efficiency level. INPUT SECTION Input the following data (if any parameter is missing, calculator will set to default value). Defaults Type of Ice Cube Machine Ice Making Head Self-Contained Remote Condensing Unit Ice Making Head Type of Condenser Air Cooled Water Cooled Air Cooled Ice Harvest Rate (lbs. ice per 24 hrs.) lbs. per 24 hrs. 500 lbs. per 24 hrs. Energy Consumption (per 100 lbs. of ice) kWh 5.5 kWh Quantity of ice machines to be purchased 1 Energy Cost $/kWh 0.06 $/kWh Annual Hours of Operation hrs. 3000 hrs. Calculate Reset OUTPUT SECTION Performance per Ice Cube Machine Your

225

Millimetre-Wave Aperture Synthesis Radiometry for Snow and Ice Mapping Andy R Harvey1  

E-Print Network (OSTI)

surface salinity, soil moisture content and wind velocity [2]. Mechanical, mm-wave pencil beam scanners application to (1) mapping of snow and ice cover and (2) determination of ocean wind vector. The most mature that is push-broom scanned to form a two-dimensional image. Other candidate techniques are the Mills Cross [5

Harvey, Andy

226

The precession constant of the Earth: Variations through the ice-age  

SciTech Connect

We directly calculate the history of variations in Earth`s precession constant H that are forced by variations in surface mass associated with late Pleistocene ice-age glaciation and deglaciation events. Our analyses show that the magnitude of Delta H/H(sub zero) is lower than that required to cause the recently hypothesized resonant reduction of the precession period.

Peltier, W.R.; Jiang, X. [Univ. of Toronto, Ontario (Canada)] [Univ. of Toronto, Ontario (Canada)

1994-10-01T23:59:59.000Z

227

The nal phase of dead-ice moraine development: processes and sediment architecture, Kotlujokull, Iceland  

E-Print Network (OSTI)

with an interrelated group of re-sedimentation processes and surface features. Series of sinkholes evolve at the toeThe ®nal phase of dead-ice moraine development: processes and sediment architecture, Ko the ®nal melting processes to the architecture of the sedimentary end product. In the current humid sub

Ingólfsson, ?lafur

228

The generation of martian floods by the melting of ground ice above dykes  

Science Journals Connector (OSTI)

... formed by extension. The surface has also been modified by enormous floods, probably of water, which often flowed out of valleys formed by the largest of these faults. By ... can provide a heat source to melt ground ice, and so provide a source of water for the floods that have been inferred to originate in some of the large valleys ...

Dan McKenzie; Francis Nimmo

1999-01-21T23:59:59.000Z

229

1 Aerospace EngineeringLampton and Valasek Prediction of Icing Effects on the  

E-Print Network (OSTI)

/Directional Stability and Control of Light Airplanes Amanda Lampton Dr. John Valasek Texas A&M University AIAA Median volumetric diameter #12;5 Aerospace EngineeringLampton and Valasek Separation Bubble Schematic of Upper Surface Separation Bubble Aft of Leading-Edge Ice Accretion #12;6 Aerospace Engineering

Valasek, John

230

Amundsen Sea sea-ice variability, atmospheric circulation, and spatial variations in snow isotopic composition from new West Antarctic firn cores  

E-Print Network (OSTI)

Recent work has documented dramatic changes in the West Antarctic Ice Sheet (WAIS) over the past 30 years (e.g., mass loss, glacier acceleration, surface warming) due largely to the influence of the marine environment. ...

Criscitiello, Alison Sara

2014-01-01T23:59:59.000Z

231

Laboratory investigations of irradiated acetonitrile-containing ices on an interstellar dust analog  

SciTech Connect

Reflection-absorption infrared spectroscopy is used to study the impact of low-energy electron irradiation of acetonitrile-containing ices, under conditions close to those in the dense star-forming regions in the interstellar medium. Both the incident electron energy and the surface coverage were varied. The experiments reveal that solid acetonitrile is desorbed from its ultrathin solid films with a cross section of the order of 10{sup -17} cm{sup 2}. Evidence is presented for a significantly larger desorption cross section for acetonitrile molecules at the water-ice interface, similar to that previously observed for the benzene-water system.

Abdulgalil, Ali G. M.; Marchione, Demian; Rosu-Finsen, Alexander; Collings, Mark P.; McCoustra, Martin R. S. [School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton, Edinburgh, EH14 4AS (United Kingdom)

2012-07-15T23:59:59.000Z

232

GREAT LAKES ICE COVER RaymondA. Asset'  

E-Print Network (OSTI)

hydropower production and cooling water intakes, and damaging shore structures. Ice cover also impactsChapter 6 GREAT LAKES ICE COVER RaymondA. Asset' ABSTRACT: Theformation of ice on the Lallrentian (~rthe Great Lakes anel local weather and climate. The (I1Inllal seasonal and ~'Patialprogression of ice

233

SNOW ON ANTARCTIC SEA ICE Robert A. Massom,1  

E-Print Network (OSTI)

SNOW ON ANTARCTIC SEA ICE Robert A. Massom,1 Hajo Eicken,2 Christian Haas,3 Martin O. Jeffries,2 on Antarctic sea ice plays a complex and highly variable role in air-sea-ice interaction pro- cesses of thicker snow and thin- ner ice in the Antarctic relative to the Arctic (e.g., the importance of flooding

Warren, Stephen

234

CO2 Ice toward Low-luminosity, Embedded Protostars: Evidence for Episodic Mass Accretion via Chemical History  

E-Print Network (OSTI)

We present Spitzer IRS spectroscopy of CO2 ice bending mode spectra at 15.2 micrometer toward 19 young stellar objects with luminosity lower than 1 Lsun (3 with luminosity lower than 0.1 Lsun). Ice on dust grain surfaces can encode the history of heating because pure CO2 ice forms only at elevated temperature, T > 20 K, and thus around protostars of higher luminosity. Current internal luminosities of YSOs with L produce pure CO2 ice at radii where typical envelopes begin. The presence of detectable amounts of pure CO2 ice would signify a higher past luminosity. Many of the spectra require a contribution from a pure, crystalline CO2 component, traced by the presence of a characteristic band splitting in the 15.2 micrometer bending mode. About half of the sources (9 out of 19) in the low luminosity sample have evidence for pure CO2 ice, and six of these have significant double-peaked features, which are very strong evidence of pure CO2 ice. The presence of the...

Kim, Hyo Jeong; Dunham, Michael M; Lee, Jeong-Eun; Pontoppidan, Klaus M

2012-01-01T23:59:59.000Z

235

The Risk Assessment Information System  

NLE Websites -- All DOE Office Websites (Extended Search)

Risk Assessment Documents Risk Assessment Documents ORNL RA Graphic Results ORNL Baseline Risk Assessment Results ORNL Screening Risk Assessment Results ORNL Other Risk Assessment Results ORNL RA Graphic Results WAG 2 Residential Landuse Sediment - Total Risk Sediment - Cesium 137 Risk Sediment - Cobalt 60 Risk Surface Water - Total Hazard Surface Water - Total Risk Surface Water - Strontium 90 Risk Surface Water - Tritium Risk Recreational Landuse Sediment - Total Risk Sediment - Cesium 137 Risk Sediment - Cobalt 60 Risk Surface Water - Total Hazard Surface Water - Total Risk Surface Water - Strontium 90 Risk Surface Water - Tritium Risk Recreational Landuse (No Fish) Surface Water - Total Hazard Surface Water - Total Risk Surface Water - Strontium 90 Risk Surface Water - Tritium Risk Industrial Landuse

236

Optimization of a Sea Ice Model Using Basinwide Observations of Arctic Sea Ice Thickness, Extent, and Velocity  

E-Print Network (OSTI)

datasets. 1. Introduction Sea ice is important to the climate system because it insulates the cold polarOptimization of a Sea Ice Model Using Basinwide Observations of Arctic Sea Ice Thickness, Extent 2004, in final form 27 June 2005) ABSTRACT A stand-alone sea ice model is tuned and validated using

Feltham, Daniel

237

Nailing Down Ice in a Cloud Model  

NLE Websites -- All DOE Office Websites (Extended Search)

Nailing Down Ice in a Cloud Model Nailing Down Ice in a Cloud Model For original submission and image(s), see ARM Research Highlights http://www.arm.gov/science/highlights/ Research Highlight A research team led by scientists at Pacific Northwest National Laboratory identified specific strengths and weaknesses of four different ice cloud retrieval algorithms. Their comparisons tested the ability of the algorithms to obtain cloud properties from radar and lidar observational measurements. The team noted the sometimes large variances in heating/cooling measurements compared to the observed data. Identifying specific weaknesses will help scientists improve our understanding of cloud properties in the atmosphere, which can be used for climate model development and evaluation. "Measuring the effective size and mass of ice crystals impacts our understanding

238

Neutron Diffraction of Ice in Hydrogels  

Science Journals Connector (OSTI)

Neutron Diffraction of Ice in Hydrogels ... (14, 15) Neutrons are also especially suited for studying D2O water in hydrogels because hydrogen atoms (H) on the polymer chains are not detectable. ...

Yurina Sekine; Tomoko Ikeda-Fukazawa; Mamoru Aizawa; Riki Kobayashi; Songxue Chi; Jaime A. Fernandez-Baca; Hiroki Yamauchi; Hiroshi Fukazawa

2014-08-26T23:59:59.000Z

239

A New Greenland Deep Ice Core  

Science Journals Connector (OSTI)

...isotopic profile with that from camp Century and with a deep-sea foraminifera...deep-sea cores. The redated Camp Century record suggests a dramatic termination...CENTURIES OF CLIMATIC RECORD FROM CAMP CENTURY ON GREENLAND ICE SHEET, SCIENCE...

W. Dansgaard; H. B. Clausen; N. Gundestrup; C. U. Hammer; S. F. Johnsen; P. M. Kristinsdottir; N. Reeh

1982-12-24T23:59:59.000Z

240

Weakening of ice by magnesium perchlorate hydrate  

E-Print Network (OSTI)

I show that perchlorate hydrates, which have been indirectly detected at high Martian circumpolar latitudes by the Phoenix Mars Lander, have a dramatic effect upon the rheological behavior of polycrystalline water ice under ...

Lenferink, Hendrik J., 1985-

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Quantifying fit in ice hockey skate boots.  

E-Print Network (OSTI)

??Purpose. This study quantified fit of ice hockey skate boots by measuring the pressure (MP) at the foot/ankle-to-boot interface using three skate sizes. The relationship (more)

Gheorghiu, Cristian R.

2005-01-01T23:59:59.000Z

242

Scattering Properties of Oriented Hexagonal Ice Crystals  

E-Print Network (OSTI)

To interpret the data from spaceborn lidar measurements, one must have a basic understanding of the backscattering of oriented ice particles. The conventional raytracing method is not applicable to the scattering of light by oriented particles...

Zhang, Feng

2010-01-14T23:59:59.000Z

243

Hydrogen Material Compatibility for Hydrogen ICE | Department...  

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

Merit Review and Peer Evaluation Meeting, May 18-22, 2009 -- Washington D.C. pm04smith.pdf More Documents & Publications Hydrogen Materials Compatibility for the H-ICE...

244

Observations of the Askaryan Effect in Ice  

SciTech Connect

We report on the first observations of the Askaryan effect in ice: coherent impulsive radio Cherenkov radiation from the charge asymmetry in an electromagnetic (EM) shower. Such radiation has been observed in silica sand and rock salt, but this is the first direct observation from an EM shower in ice. These measurements are important since the majority of experiments to date that rely on the effect for ultra-high energy neutrino detection are being performed using ice as the target medium. As part of the complete validation process for the Antarctic Impulsive Transient Antenna (ANITA) experiment, we performed an experiment at the Stanford Linear Accelerator Center (SLAC) in June 2006 using a 7.5 metric ton ice target, yielding results fully consistent with theoretical expectations.

Gorham, P.W.

2007-01-16T23:59:59.000Z

245

Microsoft Word - IceMountainFinal.docx  

NLE Websites -- All DOE Office Websites (Extended Search)

Mason West Virginia's Ice Mountain: Where Science Meets Magic On August 6, 1918, the thermometer hit 109 degrees in Hampshire County, West Virginia. It's easy to believe that the...

246

Regelation: why does ice melt under pressure?  

E-Print Network (OSTI)

Unlike other unusual materials whose bonds contract under compression, the O:H nonbond undergoes contraction and the H-O bond elongation towards O:H and H-O length symmetry in water and ice. The energy drop of the H-O bond dictates the melting point Tm depression of ice. Once the pressure is relieved, the O:H-O bond fully recovers its initial state, resulting in Regelation.

Sun, Chang Q

2015-01-01T23:59:59.000Z

247

The D/H Ratio of Water Ice at Low Temperatures  

E-Print Network (OSTI)

We present the modeling results of deuterium fractionation of water ice, H2, and the primary deuterium isotopologues of H3+ adopting physical conditions associated with the star and planet formation process. We calculated the deuterium chemistry for a range of gas temperatures (T_gas ~ 10 - 30 K), molecular hydrogen density (n(H2)~ 10^4 - 10^7), and ortho/para ratio (opr) of H2 based on state-to-state reaction rates and explore the resulting fractionation including the formation of a water ice mantle coating grain surfaces. We find that the deuterium fractionation exhibits the expected temperature dependence of large enrichments at low gas temperature. More significantly the inclusion of water ice formation leads to large D/H ratios in water ice (>= 10^-2 at 10 K) but also alters the overall deuterium chemistry. For T < 20 K the implantation of deuterium into ices lowers the overall abundance of HD which reduces the efficiency of deuterium fractionation at high density. In agreement with an earlier study, ...

Lee, Jeong-Eun

2014-01-01T23:59:59.000Z

248

Extraction of the seabed critical angle using ice cracking noise as a signal source  

Science Journals Connector (OSTI)

A technique is described for measuring the reflection coefficient of the Arctic seabed with a single vertical array of hydrophones. Naturally occurring ice cracks were used as the acoustic sources. This method circumvents the difficulties and expense of introducing artificial sound sources through the thick Arctic pack ice. The measurements were made in April with a 22?element array suspended from the ice in 420 m of water. The range of the source is first determined using the direct arrival and multiple reflections from the seabed and under?ice surface. Then the directivity index is determined using the direct arrival path only. A plot of the reflection coefficient versus grazing angle clearly indicates the value of the critical angle. The sound speed of the sea bottom corresponding to this critical angle agrees well with that measured from a bottom grab sample taken during the field trip. Finally an interesting phenomenon was an anomalous increase of power at a grazing angle of 60. This is associated with a leaky plate wave radiating at the ice?water interface.

Pierre Zakarauskas; Ronald I. Verrall; Michael V. Greening

1990-01-01T23:59:59.000Z

249

Spin-One Ising Model for Ice VIIPlastic Ice Phase Transitions  

Science Journals Connector (OSTI)

We propose a spin model compatible with ice VIIplastic ice phase transitions and critical phenomena discovered recently by computer simulations. The BlumeCapel spin-1 Ising model is extended in order to describe the entropic stabilization effect in the ...

Masakazu Matsumoto; Kazuhiro Himoto; Hideki Tanaka

2014-08-21T23:59:59.000Z

250

Nonequilibrium air clathrate hydrates in Antarctic ice: a paleopiezomdter for polar ice caps  

Science Journals Connector (OSTI)

...long as the ice thickness changes by only a few hundred meters. Examination of the deep ice cores from the Dye-3 and Camp Century sites in Greenland were made by the same microscopic thermal-needle method: at both these sites the onset of craigite...

H Craig; H Shoji; C C Langway; Jr

1993-01-01T23:59:59.000Z

251

ICED'09/Paper number (Contribution ID) 1 INTERNATIONAL CONFERENCE ON ENGINEERING DESIGN, ICED'09  

E-Print Network (OSTI)

ICED'09/Paper number (Contribution ID) 1 INTERNATIONAL CONFERENCE ON ENGINEERING DESIGN, ICED'09 24 - 27 AUGUST 2009, STANFORD UNIVERSITY, STANFORD, CA, USA CREATIVITY THEORIES AND SCIENTIFIC DISCOVERY: A STUDY OF C-K THEORY AND INFUSED DESIGN ABSTRACT Creativity is central to human activity

Shai, Offer

252

ICED'09/373 1 INTERNATIONAL CONFERENCE ON ENGINEERING DESIGN, ICED'09  

E-Print Network (OSTI)

ICED'09/373 1 INTERNATIONAL CONFERENCE ON ENGINEERING DESIGN, ICED'09 24 - 27 AUGUST 2009, STANFORD UNIVERSITY, STANFORD, CA, USA CREATIVITY THEORIES AND SCIENTIFIC DISCOVERY: A STUDY OF C-K THEORY AND INFUSED Creativity is central to human activity and is a powerful force in personal and organizational success

Reich, Yoram

253

A Comprehensive Parameterization of Heterogeneous Ice Nucleation of Dust Surrogate: Laboratory Study with Hematite Particles and Its Application to Atmospheric Models  

SciTech Connect

A new heterogeneous ice nucleation parameterization that covers a wide temperature range (-36 ?C to -78 ?C) is presented. Developing and testing such an ice nucleation parameterization, which is constrained through identical experimental conditions, is critical in order to accurately simulate the ice nucleation processes in cirrus clouds. The surface-scaled ice nucleation efficiencies of hematite particles, inferred by ns, were derived from AIDA (Aerosol Interaction and Dynamics in the Atmosphere) cloud chamber measurements under water subsaturated conditions that were realized by continuously changing temperature (T) and relative humidity with respect to ice (RHice) in the chamber. Our measurements showed several different pathways to nucleate ice depending on T and RHice conditions. For instance, almost independent freezing was observed at -60 ?C < T < -50 ?C, where RHice explicitly controlled ice nucleation efficiency, while both T and RHice played roles in other two T regimes: -78 ?C < T < -60 ?C and -50 ?C < T < -36 ?C. More specifically, observations at T colder than -60 ?C revealed that higher RHice was necessary to maintain constant ns, whereas T may have played a significant role in ice nucleation at T warmer than -50 ?C. We implemented new ns parameterizations into two cloud models to investigate its sensitivity and compare with the existing ice nucleation schemes towards simulating cirrus cloud properties. Our results show that the new AIDA-based parameterizations lead to an order of magnitude higher ice crystal concentrations and inhibition of homogeneous nucleation in colder temperature regions. Our cloud simulation results suggest that atmospheric dust particles that form ice nuclei at lower temperatures, below -36 ?C, can potentially have stronger influence on cloud properties such as cloud longevity and initiation when compared to previous parameterizations.

Hiranuma, Naruki; Paukert, Marco; Steinke, Isabelle; Zhang, Kai; Kulkarni, Gourihar R.; Hoose, Corinna; Schnaiter, Martin; Saathoff, Harald; Mohler, Ottmar

2014-12-10T23:59:59.000Z

254

Critical Mechanisms for the Formation of Extreme Arctic Sea-Ice Extent in the Summers of 2007 and 1996  

SciTech Connect

A warming Arctic climate is undergoing significant e 21 nvironmental change, most evidenced by the reduction of Arctic sea-ice extent during the summer. In this study, we examine two extreme anomalies of September sea-ice extent in 2007 and 1996, and investigate the impacts of cloud fraction (CF), atmospheric precipitable water vapor (PWV), downwelling longwave flux (DLF), surface air temperature (SAT), pressure and winds on the sea-ice variation in 2007 and 1996 using both satellite-derived sea-ice products and MERRA reanalysis. The area of the Laptev, East Siberian and West Chukchi seas (70-90oN, 90-180oE) has experienced the largest variation in sea-ice extent from year-to-year and defined here as the Area Of Focus (AOF). The record low September sea-ice extent in 2007 was associated with positive anomalies 30 of CF, PWV, DLF, and SAT over the AOF. Persistent anti-cyclone positioned over the Beaufort Sea coupled with low pressure over Eurasia induced easterly zonal and southerly meridional winds. In contrast, negative CF, PWV, DLF and SAT anomalies, as well as opposite wind patterns to those in 2007, characterized the 1996 high September sea-ice extent. Through this study, we hypothesize the following positive feedbacks of clouds, water vapor, radiation and atmospheric variables on the sea-ice retreat during the summer 2007. The record low sea-ice extent during the summer 2007 is initially triggered by the atmospheric circulation anomaly. The southerly winds across the Chukchi and East Siberian seas transport warm, moist air from the north Pacific, which is not only enhancing sea-ice melt across the AOF, but also increasing clouds. The positive cloud feedback results in higher SAT and more sea-ice melt. Therefore, 40 more water vapor could be evaporated from open seas and higher SAT to form more clouds, which will enhance positive cloud feedback. This enhanced positive cloud feedback will then further increase SAT and accelerate the sea-ice retreat during the summer 2007.

Dong, Xiquan; Zib, Benjamin J.; Xi, Baike; Stanfield, Ryan; Deng, Yi; Zhang, Xiangdong; Lin, B.; Long, Charles N.

2014-07-29T23:59:59.000Z

255

Multisite Disordered Structure of Ice VII to 20 GPa  

Science Journals Connector (OSTI)

Neutron diffraction measurements on ice VII and ice VIII at pressures up to 20 GPa provide direct evidence of multisite disorder of both oxygen and deuterium atoms in D2O ice VII, and give the magnitudes of the site separations. An O-D distance and D--D angle closest to those found in ice VIII are obtained with oxygen sites displaced along ?111? directions. Such displacements imply an H-bond geometry significantly different from that found in ice VIII, and this may have implications for the centering transition to ice X.

R. J. Nelmes; J. S. Loveday; W. G. Marshall; G. Hamel; J. M. Besson; S. Klotz

1998-09-28T23:59:59.000Z

256

Acoustic and seismic measurement of ice processes  

Science Journals Connector (OSTI)

As sea ice responds to environmental forcing it deforms leading to the storage of strain energy. When mechanical failure occurs most of this energy is dissipated through fracturing but a small portion radiates as seismic and acoustic waves. These waves provide useful signals for sensing the failure process in the ice. In a recent ice mechanics experiment conducted north of Prudhoe Bay (SIMI 94) a large number of ice failure events were observed using geophone and hydrophone arrays. Preliminary results are presented including a large?scale tensile fracture test and naturally occurring sounds near a closing lead. For the artificial fracture the acoustic signals allow determination of cracking rate fracture advance and crack propagation velocities. The overall crack propagation speed is estimated to be of order 50 m?s?1; maximum cracking activities occur prior to peak loading. In the second data set the naturally occurring stick?slip process was observed as two ice sheets moved against each other in a closing lead. A wide range of frequencies can occur simultaneously representing different components of the sliding and slipping mechanisms.

David M. Farmer; Yunbo Xie

1995-01-01T23:59:59.000Z

257

Hydrogenation reactions in interstellar CO ice analogues  

E-Print Network (OSTI)

Hydrogenation reactions of CO in inter- and circumstellar ices are regarded as an important starting point in the formation of more complex species. Previous laboratory measurements by two groups on the hydrogenation of CO ices resulted in controversial results on the formation rate of methanol. Our aim is to resolve this controversy by an independent investigation of the reaction scheme for a range of H-atom fluxes and different ice temperatures and thicknesses. Reaction rates are determined by using a state-of-the-art ultra high vacuum experimental setup to bombard an interstellar CO ice analog with room temperature H atoms. The reaction of CO + H into H2CO and subsequently CH3OH is monitored by a Fourier transform infrared spectrometer in a reflection absorption mode. In addition, after each completed measurement a temperature programmed desorption experiment is performed to identify the produced species. Different H-atom fluxes, morphologies, and ice thicknesses are tested. The formation of both formaldeh...

Fuchs, G W; Ioppolo, S; Romanzin, C; Bisschop, S E; Andersson, S; Van Dishoeck, E F; Linnartz, H

2009-01-01T23:59:59.000Z

258

THE RADIAL DISTRIBUTION OF WATER ICE AND CHROMOPHORES ACROSS SATURN'S SYSTEM  

SciTech Connect

Over the past eight years, the Visual and Infrared Mapping Spectrometer (VIMS) on board the Cassini orbiter has returned hyperspectral images in the 0.35-5.1 {mu}m range of the icy satellites and rings of Saturn. These very different objects show significant variations in surface composition, roughness, and regolith grain size as a result of their evolutionary histories, endogenic processes, and interactions with exogenic particles. The distributions of surface water ice and chromophores, i.e., organic and non-icy materials, across the Saturnian system, are traced using specific spectral indicators (spectral slopes and absorption band depths) obtained from rings mosaics and disk-integrated satellites observations by VIMS. Moving from the inner C ring to Iapetus, we found a marking uniformity in the distribution of abundance of water ice. On the other hand, the distribution of chromophores is much more concentrated in the rings particles and on the outermost satellites (Rhea, Hyperion, and Iapetus). A reduction of red material is observed on the satellites' surfaces orbiting within the E ring environment likely due to fine particles from Enceladus' plumes. Once the exogenous dark material covering the Iapetus' leading hemisphere is removed, the texture of the water ice-rich surfaces, inferred through the 2 {mu}m band depth, appears remarkably uniform across the entire system.

Filacchione, G.; Capaccioni, F.; Cerroni, P.; Tosi, F.; Ciarniello, M. [INAF-IAPS, Istituto di Astrofisica e Planetologia Spaziali, Area di Ricerca di Tor Vergata, via del Fosso del Cavaliere, 100, I-00133, Rome (Italy)] [INAF-IAPS, Istituto di Astrofisica e Planetologia Spaziali, Area di Ricerca di Tor Vergata, via del Fosso del Cavaliere, 100, I-00133, Rome (Italy); Clark, R. N. [Federal Center, US Geological Survey, Denver, CO 80228 (United States)] [Federal Center, US Geological Survey, Denver, CO 80228 (United States); Nicholson, P. D.; Lunine, J. I.; Hedman, M. M. [Astronomy Department, Cornell University, 418 Space Sciences Building, Ithaca, NY 14853 (United States)] [Astronomy Department, Cornell University, 418 Space Sciences Building, Ithaca, NY 14853 (United States); Cruikshank, D. P.; Cuzzi, J. N. [NASA Ames Research Center, Moffett Field, CA 94035-1000 (United States)] [NASA Ames Research Center, Moffett Field, CA 94035-1000 (United States); Brown, R. H. [Lunar Planetary Laboratory, University of Arizona, Kuiper Space Sciences 431A, Tucson, AZ 85721-0092 (United States)] [Lunar Planetary Laboratory, University of Arizona, Kuiper Space Sciences 431A, Tucson, AZ 85721-0092 (United States); Buratti, B. J. [NASA Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States)] [NASA Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States); Flamini, E., E-mail: gianrico.filacchione@iaps.inaf.it [ASI, Italian Space Agency, viale Liegi 26, I-00198 Rome (Italy)

2013-04-01T23:59:59.000Z

259

FORMATION OF GLYCINE ON ULTRAVIOLET-IRRADIATED INTERSTELLAR ICE-ANALOG FILMS AND IMPLICATIONS FOR INTERSTELLAR AMINO ACIDS  

SciTech Connect

We report the synthesis of glycine on interstellar ice-analog films composed of water, methylamine (MA), and carbon dioxide under irradiation of ultraviolet (UV) photons. Analysis of the UV-irradiated ice films by in situ mass spectrometric methods revealed glycine and other isomers as photochemical products. Deuterium-labeling experiments were conducted to determine the structures of the photoproducts and to examine their formation pathways. The reactions occur via photocleavages of C-H and N-H bonds in MA, followed by subsequent reactions of the nascent H atom with CO{sub 2}, leading to the formation of HOCO and then to glycine and carbamic acid. The photochemical synthesis of glycine occurs efficiently at the ice surfaces, and the competing photosynthesis and photodestruction processes can reach a steady-state kinetic balance at an extended UV exposure, maintaining a substantial population level of glycine. The observation suggests that interstellar amino acids can be created on ice grains, and that they can also be stored in the ices by maintaining a kinetic balance under interstellar UV irradiation. As such, the transport of amino acids in interstellar space may be possible without depleting the net abundance of amino acids in the ices but rather increasing the structural diversity of the molecules.

Lee, Chang-Woo; Kim, Joon-Ki; Moon, Eui-Seong; Kang, Heon [Department of Chemistry, Seoul National University, Gwanak-gu, Seoul 151-747, Republic of Korea (H.K.) (Korea, Republic of); Minh, Y. C. [Korea Astronomy and Space Science Institute, 838 Daeduk-daero, Yuseong-gu, Daejeon 305-348 (Korea, Republic of)], E-mail: surfion@snu.ac.kr

2009-05-20T23:59:59.000Z

260

Ice Towing Tank | Open Energy Information  

Open Energy Info (EERE)

Ice Towing Tank Ice Towing Tank Jump to: navigation, search Basic Specifications Facility Name Ice Towing Tank Overseeing Organization University of Iowa Hydrodynamic Testing Facility Type Tow Tank Length(m) 21.2 Beam(m) 5.0 Depth(m) 1.3 Cost(per day) Contact POC Special Physical Features Specialized for cold regions research, room temperature can be decreased to -10°F Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 0.5 Length of Effective Tow(m) 15.0 Wavemaking Capabilities Wavemaking Capabilities None Channel/Tunnel/Flume Channel/Tunnel/Flume None Wind Capabilities Wind Capabilities None Control and Data Acquisition Cameras Yes Description of Camera Types Underwater Available Sensors Acoustics, Thermal, Turbulence, Velocity Data Generation Capability

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

High-resolution subsurface water-ice distributions on Mars  

Science Journals Connector (OSTI)

... Theoretical models indicate that water ice is stable in the shallow subsurface (depths of water-ice table that steadily increases in depth with decreasing latitude. More detailed modelling has ...

Joshua L. Bandfield

2007-05-03T23:59:59.000Z

262

Searching for Cosmic Accelerators via IceCube  

NLE Websites -- All DOE Office Websites (Extended Search)

Searching for Cosmic Accelerators via IceCube Searching for Cosmic Accelerators via IceCube Berkeley Lab Researchers Part of an International Hunt November 21, 2013 Lynn Yarris,...

263

Application of Ice Nucleation Kinetics in Orographic Clouds  

Science Journals Connector (OSTI)

Ice nucleation by silver iodide-sodium iodide aerosol particles has been characterized in the Colorado State University isothermal cloud chamber using the techniques of chemical kinetics. Two separate mechanisms of condensation-freezing ice ...

Rochelle R. Blumenstein; Robert M. Rauber; Lewis O. Grant; William G. Finnegan

1987-10-01T23:59:59.000Z

264

Evolutionary Optimization of an Ice Accretion Forecasting System  

Science Journals Connector (OSTI)

The ability to model and forecast accretion of ice on structures is very important for many industrial sectors. For example, studies conducted by the power transmission industry indicate that the majority of failures are caused by icing on ...

Pawel Pytlak; Petr Musilek; Edward Lozowski; Dan Arnold

2010-07-01T23:59:59.000Z

265

Cirrus cloud formation and the role of heterogeneous ice nuclei  

E-Print Network (OSTI)

Composition, size, and phase are key properties that define the ability of an aerosol particle to initiate ice in cirrus clouds. Properties of cirrus ice nuclei (IN) have not been well constrained due to a lack of systematic ...

Froyd, Karl D.

2013-01-01T23:59:59.000Z

266

Meltwater effects on flow of Greenland's ice sheet less severe...  

NLE Websites -- All DOE Office Websites (Extended Search)

severe than feared Meltwater effects on flow of Greenland's ice sheet less severe for sea level rise than earlier feared, scientists say The team found that accelerating ice sheet...

267

Field determination of the densities of lake ice sheets  

Science Journals Connector (OSTI)

Oct 3, 1975 ... mating the mean density of the white ice component of such a sheet makes use of the buoyancy equation for floating ice in the form h' ' p'i =.

2000-01-04T23:59:59.000Z

268

Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Electric Ice Electric Ice Resurfacers Improve Air Quality in Minnesota to someone by E-mail Share Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality in Minnesota on Facebook Tweet about Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality in Minnesota on Twitter Bookmark Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality in Minnesota on Google Bookmark Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality in Minnesota on Delicious Rank Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality in Minnesota on Digg Find More places to share Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality in Minnesota on AddThis.com... Sept. 14, 2013

269

High-Resolution Monitoring of Internal Layers Over the Greenland Ice Sheet P. Kanagaratnam, S.P. Gogineni  

E-Print Network (OSTI)

been attributed to the melting of mountain glaciers among other causes. The mass balance of the glacial ice plays an important role in the rise of the Earth's sea level. A key variable in assessing the mass. Accumulation data are sparse, and there are large uncertainties in existing accumulation rate maps derived from

Kansas, University of

270

ANIMATION OF THE NORMAL ICE CYCLE OF THE LAURENTIAN GREAT LAKES OF NORTH AMERICA  

E-Print Network (OSTI)

OF ANNUAL ICE CYCLE 1. Fall Cooling 2. Ice Formation 3. Ice Thickness 4. Seasonal Maximum Ice Cover 5ANIMATION OF THE NORMAL ICE CYCLE OF THE LAURENTIAN GREAT LAKES OF NORTH AMERICA R.A. Assel and J describes an interactive menu- driven computer tutorial on the contemporary ice cover climatology

271

Maximum late Holocene extent of the western Greenland Ice Sheet during the late 20th century  

E-Print Network (OSTI)

the 20th century. This suggests a lagged ice-margin response to prior cooling, such as the Little Ice AgeMaximum late Holocene extent of the western Greenland Ice Sheet during the late 20th century Samuel Keywords: Greenland Ice Sheet Little Ice Age 10 Be exposure dating Ice-dammed lake Lake sediment core a b

Briner, Jason P.

272

Numerical simulation of ice-induced loads on ships and comparison with field measurements  

E-Print Network (OSTI)

Department of Marine Technology, NTNU May 28, 2013 #12;Motivation Local ice load Global ice load ShipNumerical simulation of ice-induced loads on ships and comparison with field measurements Biao Su's performance · Ice-hull interaction · Local ice load · Global ice load · Ship's performance #12;Outline

Nørvåg, Kjetil

273

Maneuverability of ships in ice: numerical simulation and comparison with field measurements  

E-Print Network (OSTI)

Maneuverability of ships in ice: numerical simulation and comparison with field measurements Biao Su Department of Marine Technology, NTNU May 28, 2013 #12;Motivation Local ice load Global ice load Ship's performance · Ice-hull interaction · Local ice load · Global ice load · Ship's performance #12

Nørvåg, Kjetil

274

Structure-based characterization and antifreeze properties of a hyperactive ice-binding protein from the Antarctic bacterium Flavobacterium frigoris PS1  

Science Journals Connector (OSTI)

The high-resolution crystal structure of FfIBP was determined and the structure showed an intramolecular disulfide bond in the capping head loop region and a T-A/G-X-T/N ice-binding motif. The rigid capping head loop region and greater surface area of the ice-binding site are important for the antifreeze activity of FfIBP.

Do, H.

2014-03-19T23:59:59.000Z

275

Recent Metal Pollution in Agassiz Ice Cap  

Science Journals Connector (OSTI)

This is probably due to the close proximity and similar elevation of the two areas (Agassiz Ice Cap, Canadian Arctic and Camp Century, northwest Greenland), which are likely subjected to the same polluted air masses. ... Figure 3 shows Pb concentrations covering the past 250 years for three different Arctic areas:? Camp Century, northwest Greenland (dashed line, ref 1); Summit, central Greenland (solid line, ref 8); and Agassiz Ice Cap (star symbols, this work). ... Since Camp Century is lower than Summit (1866 vs 3228 m above sea level) and is expected to receive more pollution, the relative position of the two lines is reasonable, the dashed line being higher than the solid one. ...

V. Cheam; G. Lawson; J. Lechner; R. Desrosiers

1998-11-10T23:59:59.000Z

276

The IceCube Computing Infrastructure Model  

Science Journals Connector (OSTI)

In addition to the big LHC experiments, a number of mid-size experiments are coming online which need to define new computing models to meet the demands on processing and storage requirements of those experiments. We present the hybrid computing model of IceCube which leverages Grid models with a more flexible direct user model as an example of a possible solution. In IceCube a central data center at UW-Madison serves as a Tier-0 with a single Tier-1 at DESY Zeuthen.

M Merck; S Barnet

2012-01-01T23:59:59.000Z

277

Covered Product Category: Water-Cooled Ice Machines  

Energy.gov (U.S. Department of Energy (DOE))

The Federal Energy Management Program (FEMP) provides acquisition guidance and federal efficiency requirements for water-cooled ice machines.

278

Contemporary Lake Superior Ice Cover Climatology Raymond A. Assel  

E-Print Network (OSTI)

1973 to 2002) were digitized and analyzed to produce ice charts that portray spatial patterns of datesContemporary Lake Superior Ice Cover Climatology Raymond A. Assel NOAA Great Lakes Environmental Introduction A brief discussion of Lake Superior ice cover climatology (Phillips, 1978) was included

279

On the scatteringgreenhouse effect of CO 2 ice clouds  

E-Print Network (OSTI)

that young Mars was warm enough to support flowing water present a continuing enigma (Squyres and Kasting 1994). Kasting (1991) showed that, owing to the effects of CO 2 condensation on temperature lapse rate the optical effects of CO 2 ­ice clouds, but remarked that because CO 2 ­ice (unlike water­ice) has very low

Pierrehumbert, Raymond

280

Spectroscopic measurement of the vapour pressure of ice  

Science Journals Connector (OSTI)

...Murphy Meeting Issue Water in the gas phase . We...triple-point state of water and uses frequency-stabilized...temperature-regulated standard humidity generator, which contains ice...within 0.35 per cent. water vapour|ice vapour pressure...technical fields. In atmospheric physics, ice crystals...

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

STATE OF CALIFORNIA ICE STORAGE AIR CONDITIONING (ISAC) UNITS  

E-Print Network (OSTI)

cooling with the compressor). Yes No #12;STATE OF CALIFORNIA ICE STORAGE AIR CONDITIONING (ISAC) UNITS CECSTATE OF CALIFORNIA ICE STORAGE AIR CONDITIONING (ISAC) UNITS CEC-CF-6R-MECH-08 (Revised 08/09) CALIFORNIA ENERGY COMMISSION INSTALLATION CERTIFICATE CF-6R-MECH-08 Ice Storage Air Conditioning (ISAC) Units

282

Climate impacts of ice nucleation A. Gettelman,1,2  

E-Print Network (OSTI)

back to space, cooling the planet. However, ice clouds, being cold, radiate much less long wave and cooling, with warming thought to be slightly larger. [3] Changes to ice cloud microphysics might alterClimate impacts of ice nucleation A. Gettelman,1,2 X. Liu,3 D. Barahona,4,5 U. Lohmann,2 and C

Gettelman, Andrew

283

Stresses generated in cooling viscoelastic ice shells: Application to Europa  

E-Print Network (OSTI)

Stresses generated in cooling viscoelastic ice shells: Application to Europa F. Nimmo Department to cooling and the expansion of the shell due to the ice-water volume change. The former effect generates Citation: Nimmo, F. (2004), Stresses generated in cooling viscoelastic ice shells: Application to Europa, J

Nimmo, Francis

284

Characteristics of Arctic Sea-Ice Thickness Variability in GCMs  

Science Journals Connector (OSTI)

Skillful Arctic sea ice forecasts may be possible for lead times of months or even years owing to the persistence of thickness anomalies. In this study sea ice thickness variability is characterized in fully coupled GCMs and sea iceocean-only ...

Edward Blanchard-Wrigglesworth; Cecilia M. Bitz

2014-11-01T23:59:59.000Z

285

Autosub missions beneath Polar Ice: Preparation and Experience  

E-Print Network (OSTI)

Autosub missions beneath Polar Ice: Preparation and Experience Gwyn Griffiths Southampton, May 2004 #12;Autosub Polar Campaigns J 2001 - Krill distribution and sea ice thickness studies in the northern Weddell Sea (Brierley, Fernandes and Brandon). J 2003 - Sea ice thickness, Bellingshausen Sea

Griffiths, Gwyn

286

Bonding and Electronic Properties of Ice at High Pressure  

E-Print Network (OSTI)

between the nearest oxygen atoms. All ice structures that we discussed so far are insulators. Militzer 1 Bonding and Electronic Properties of Ice at High Pressure B. Militzer Department of Earth of water ice at megabar pressure are characterized with ab initio computer simulations. The focus lies

Militzer, Burkhard

287

ICE SHEET SOURCES OF SEA LEVEL RISE AND FRESHWATER DISCHARGE  

E-Print Network (OSTI)

ICE SHEET SOURCES OF SEA LEVEL RISE AND FRESHWATER DISCHARGE DURING THE LAST DEGLACIATION Anders E the sources of sea level rise and freshwater dis- charge to the global oceans associated with retreat of ice­10 m sea level rise at 19.0­19.5 ka, sourced largely from Northern Hemisphere ice sheet retreat

Carlson, Anders

288

FROM INTERSTELLAR POLYCYCLIC AROMATIC HYDROCARBONS AND ICE TO ASTROBIOLOGY  

E-Print Network (OSTI)

photolysis of these ices produces a host of new compounds, some of which show intriguing prebiotic behavior1 FROM INTERSTELLAR POLYCYCLIC AROMATIC HYDROCARBONS AND ICE TO ASTROBIOLOGY LOUIS J. ALLAMANDOLA, the concept of ices in dense molecular clouds ignored, and the notion of large, abundant, gas phase, carbon

289

Correspondence Laboratory observations of debris-bearing ice facies frozen  

E-Print Network (OSTI)

, others argue that supercooling is not the only mechanism for producing thick basal ice sequencesCorrespondence Laboratory observations of debris-bearing ice facies frozen from supercooled water. Supercooling has been invoked to explain anomalously thick basal ice sequences beneath temperate glaciers

Knight, Peter G.

290

The Need for SPIRIT DEMs to Quantify Antarctic Ice Sheet  

E-Print Network (OSTI)

appropriate mask ­ SPIRIT has the data and could produce the necessary DEMs #12;Conclusions · Antarctic iceThe Need for SPIRIT DEMs to Quantify Antarctic Ice Sheet Discharge Robert Bindschadler NASA & UMBC #12;Antarctic Ice Sheet Discharge · 33 largest, most active basins account for 840 Gt/a (Rignot

Berthier, Etienne

291

Computational methods for several models of ice stream flow  

E-Print Network (OSTI)

on any grid Shallow ice approximation produces oscillatory solutions Nonlinear and linear solvers haveComputational methods for several models of ice stream flow Jed Brown Laboratory of Hydrology transition at ice stream margins Bed slope is discontinuous and of order 1. Taylor expansions no longer valid

Brown, Jed

292

The Ice Rink Problem 1 Bernard M.E. Moret,  

E-Print Network (OSTI)

The Ice Rink Problem 1 Bernard M.E. Moret, Michael Collins, Jared Saia, and Ling Yu Department the sensor footprint. A similar task with a simpler geometry consists of cleaning an ice rink. We prove that the method used in ice rinks (the ``Zamboni algorithm'') is optimal and use it to develop heuristics

Moret, Bernard

293

Operation and Control of Full Ice-storage System  

E-Print Network (OSTI)

In a dividing time ice-storage system, the refrigerator does not operate during power's on-peak period, and all the cooling is supplied by the ice stored in off-peak period, so that the use of electricity can be maintained. When the ice is thawing...

Liu, Q.; Liu, Y.

2006-01-01T23:59:59.000Z

294

Real-time Non-contact Millimeter Wave Characterization of Water-Freezing and Ice-Melting Dynamics  

SciTech Connect

We applied millimeter wave radiometry for the first time to monitor water-freezing and ice-melting dynamics in real-time non-contact. The measurements were completed at a frequency of 137 GHz. Small amounts (about 2 mL) of freshwater or saltwater were frozen over a Peltier cooler and the freezing and melting sequence was recorded. Saltwater was prepared in the laboratory that contained 3.5% of table salt to simulate the ocean water. The dynamics of freezing-melting was observed by measuring the millimeter wave temperature as well as the changes in the ice or water surface reflectivity and position. This was repeated using large amounts of freshwater and saltwater (800 mL) mimicking glaciers. Millimeter wave surface level fluctuations indicated as the top surface melted, the light ice below floated up indicating lower surface temperature until the ice completely melted. Our results are useful for remote sensing and tracking temperature for potentially large-scale environmental applications, e.g., global warming.

Sundaram, S. K.; Woskov, Paul P.

2008-11-12T23:59:59.000Z

295

A STUDY OF ICE ACCUMULATION AND STABILITY IN MARTIAN CRATERS UNDER PAST ORBITAL CONDITIONS USING THE LMD MESOSCALE MODEL.  

E-Print Network (OSTI)

constraints Methodological approach Better understand the local distribution of gullies and glaciers; Blowing snow = snow coming from other areas and brought by winds. Ice sublimation: · High surface temperature, low relative humidity in the lower atmosphere, high wind strength; · High wind erosion. Figure 1

Madeleine, Jean-Baptiste

296

Composition and stability of salts on the surface of Europa and their oceanic origin  

E-Print Network (OSTI)

temperatures and variable partial pressures of water vapor, and (3) changes in aquatic chemistry and sequences. For hypothetical surface salt lag deposits, formed through sublimation/sputtering of ice and dehydration of salts uniform spectrum of that material have been interpreted in terms of sublimation/sputtering of salty ice

Rhoads, James

297

Seismic reflection studies of the Amery Ice Shelf, East Antarctica: delineating meteoric and marine ice  

Science Journals Connector (OSTI)

......important role in the global climate system (Allison...studies of the impact of global warming on present-day ice shelves...the subsequent effect on global ocean circulation and...graben, where Permian coal-bearing, flat lying......

Kathleen L. McMahon; Mark A. Lackie

2006-08-01T23:59:59.000Z

298

Ice Mass Balance Buoys: A tool for measuring and attributing changes in the thickness of the Arctic sea ice cover  

E-Print Network (OSTI)

Ice Mass Balance Buoys: A tool for measuring and attributing changes in the thickness of the Arctic sea ice cover Jacqueline A. Richter-Menge1 , Donald K. Perovich1 , Bruce C. Elder1 , Keran Claffey1 Abstract Recent observational and modeling studies indicate that the Arctic sea ice cover is undergoing

Rigor, Ignatius G.

299

Polar bears could survive on persisting ice  

Science Journals Connector (OSTI)

... 2010, although the project has stopped moving forwards since the US government clamped down on offshore oil drilling after the Gulf of Mexico spill in April. Smith doesn't know ... drilling after the Gulf of Mexico spill in April. Smith doesn't know whether a rig itself would have an impact on wildlife seeking refuge on ice in a shoal, ...

Nicola Jones

2010-12-15T23:59:59.000Z

300

Stability of ice-sheet grounding lines  

Science Journals Connector (OSTI)

...for flow down shallow valleys, while the latter considers...Pine Island glacier in West Antarctica. Conclusions...Setting gives a single valley with a width equal to...presence of the internal valley, even if it is narrow...dynamical models of the West Antarctic Ice Sheet...

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Ocean and Sea Ice SAF Technical Note  

E-Print Network (OSTI)

Ocean and Sea Ice SAF Technical Note SAF/OSI/CDOP/KNMI/TEC/TN/165 CMOD5.n - the CMOD5 GMF SAF to produce neutral winds rather than real 10m winds. Currently, the CMOD5 Geophysical Model]. KNMI subsequently produced a CMOD5.n Lookup Table and tested the retrieved Maximum Likelihood Estimator

Stoffelen, Ad

302

Catching cosmic clues in the ice - recent results from IceCube  

E-Print Network (OSTI)

IceCube is a neutrino observatory located deep in the Antarctic glacier close to the geographical South Pole. Close to a gigaton of ice has been instrumented with optical sensors with the primary goal of searching for neutrinos from the still unknown sources of the highest-energy cosmic rays. Last year, IceCube observed for the first time ever a handful of high-energy neutrinos which must have originated outside the solar system. The discovery was named the 2013 Breakthrough of the Year by the British magazine Physics World. It is the first necessary step to actually achieve the dream of charting the places in the universe able to accelerate hadrons to energies over a million times higher than those at the LHC. The science goals of IceCube extend beyond astrophysics: IceCube is also a powerful tool for searches of dark matter and can be used to study phenomena connected to the neutrinos themselves, like neutrino oscillations. The talk will be an update on the most recent results from IceCube.

CERN. Geneva

2014-01-01T23:59:59.000Z

303

Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison  

E-Print Network (OSTI)

models (SSA, AHySSA) produce larger ice sheets than modelsplan-view ice-sheet models they produce different results.the Antarctic ice sheet should at least produce grounding-

2013-01-01T23:59:59.000Z

304

Determination of Glacial-Ice Temperature Profiles Using Radar and an Antenna-Gain Estimation Technique  

E-Print Network (OSTI)

of loss [32], L (attenuation), and based on CMP geometry is presented below 2 2 2(8 ) t ice r PGL P R ? ? ?= Eq. 1.1 - 13 - The parameters Pr and Pt are the power received and transmitted which are accurately known. Also, R is the range...: ?n= ?J H Eq. 2.1 ?n= ?M E Eq. 2.2 where E and H are the electric and magnetic fields originally present on the solution box surface, respectively, and the unit vector ?n is directed outward from the surface. According...

Hughes, Michael Ryan

2008-01-01T23:59:59.000Z

305

Observed runoff, jokulhlaups and suspended sediment load from the Greenland ice at Kangerlussuaq, West Greenland, 2007 and 2008  

SciTech Connect

This study fills the gap in hydrologic measurements of runoff exiting a part of the Greenland Ice Sheet (GrIS), the Kangerlussuaq drainage area, West Greenland. The observations are of value for obtaining knowledge about the terrestrial freshwater and sediment output from part of the GrIS and the strip of land between the GrIS and the ocean, in the context of varying ice sheet surface melt and influx entering the ocean. High-resolution stage, discharge and suspended sediment load show a decrease in runoff of {approx} 25% and in sediment load of {approx} 40% from 2007 to 2008 in response to a decrease in the summer accumulated number of positive degree days. During the 2007 and 2008 runoff season, joekulhlaups are observed at Kangerlussuaq, drained from an ice-dammed lake at the margin of the GrIS.

Mernild, Sebastian Haugard [Los Alamos National Laboratory; Hasholt, Bent [UNIV OF COPENHAGEN

2009-01-01T23:59:59.000Z

306

Great Lakes Surface Environmental Analysis | Data.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Great Lakes Surface Environmental Analysis Great Lakes Surface Environmental Analysis Agriculture Community Menu DATA APPS EVENTS DEVELOPER STATISTICS COLLABORATE ABOUT Agriculture You are here Data.gov » Communities » Agriculture » Data Great Lakes Surface Environmental Analysis Dataset Summary Description The Great Lakes Surface Environmental Analysis (GLSEA2) is a digital map of the Great Lakes surface water temperature and ice cover which is produced daily at the NOAA Great Lakes Environmental Research Laboratory (GLERL) in Ann Arbor, Michigan through the NOAA CoastWatch program. The GLSEA is stored as a 1024x1024 pixel map in PNG or ASCII format, suitable for viewing on PCs and workstations with readily available software. The lake surface temperatures are derived from NOAA polar-orbiting satellite imagery obtained through the Great Lakes CoastWatch program. The addition of ice cover information was implemented in early 1999, using data provided by the National Ice Center (NIC). Lake surface temperatures are updated daily with information from the cloud-free portions of the previous day's satellite imagery. If no imagery is available, a smoothing algorithm is applied to the previous day's map. Ice information will then be added, using the most recent Great Lakes Ice Analysis produced by NIC, currently daily during the ice season. GLERL is currently receiving a product suite of an average of 108 enhanced digital images including satellite-derived surface temperature (Fig. 1.1), visible and near-infrared reflectance, brightness temperatures, cloud masks, and satellite/solar zenith angle data from the NOAA/AVHRR (Advanced Very High Resolution Radiometer).

307

Zinc isotope systematics in snow and ice accretions in Central European mountains  

Science Journals Connector (OSTI)

Abstract Zinc (Zn) pollution negatively affects human and ecosystem health. We quantified atmospheric Zn inputs at six remote mountain-top locations in the Czech Republic (Central Europe), and used ?66Zn isotope ratios to identify Zn from different pollution sources. The study sites were located at an elevation of approximately 1000m near the state borders with Germany and Poland. During two winter seasons (20092010), over 400 samples of vertical deposition (snow) and horizontal deposition (ice accretions) were collected. Zinc pollution levels were generally low. Zinc concentrations in snow and ice accretions were less than twice as high in the east, compared to the west. Across the sites, over 90% of Zn was present in a weak-acid soluble form. Zinc concentrations were 5 times higher in ice accretions, which formed from small droplets originating in the basal cloud layer, rich in pollutants, than in snow. In contrast, droplets resulting in snow formation were larger and scavenged less pollution due to their smaller surface area. ?66Zn of Pribram sphalerite (west) and smelter-derived fly ash (west) were low, ?0.23 and ?0.47, respectively. Olkusz sphalerite (east) had a higher ?66Zn of 0.02. ?66Zn of snow ranged from ?0.60 to 0.68. Ice accretions had ?66Zn between ?0.67 and 0.14. At the three eastern sites, ?66Zn of ice accretions was lower than ?66Zn of snow, suggesting the presence of volatilized smelter-derived or coal-burning derived Zn. ?66Zn of ice accretions at two of the three western sites was higher than ?66Zn of snow. Different ?66Zn values of snow and ice accretions from the same site reflected different pollution sources, which may have been situated at different distances from the receptor site. ?66Zn of the soluble Zn fraction was higher than ?66Zn of the insoluble Zn fraction, possibly also indicating a different origin of these two Zn fractions. Zinc isotope heterogeneity in the atmosphere of remote areas indicates that ?66Zn can be a useful tool in pollution provenance studies.

Petra Voldrichova; Vladislav Chrastny; Adela Sipkova; Juraj Farkas; Martin Novak; Marketa Stepanova; Michael Krachler; Frantisek Veselovsky; Vladimir Blaha; Eva Prechova; Arnost Komarek; Leona Bohdalkova; Jan Curik; Jitka Mikova; Lucie Erbanova; Petra Pacherova

2014-01-01T23:59:59.000Z

308

Solar Energetic Particle Spectrum on 13 December 2006 Determined by IceTop  

SciTech Connect

The IceTop air shower array now under construction at the South Pole as the surface component of the IceCube neutrino telescope (Achterberg et al. 2006) detected an unusual near-solar-minimum Ground Level Enhancement (GLE) after a solar flare on 13 December 2006. Beginning at 0220 UT, the 4B class flare occurred at solar coordinates S06 W24, accompanied by strong (X3.4) X-ray emission and type II and IV radio bursts. The LASCO coronagraph on the SOHO spacecraft observed a halo CME launch from the Sun at {approx} 0225 UT with speed estimated to be {approx} 1770 km/s. We have begun (Bieber et al. 2007) a comprehensive analysis of the propagation of solar energetic particles in this event. However the focus of this Letter is the new and unique ability of IceTop to derive the energy spectrum of these particles in the multi-GeV regime from a single detector with a well defined viewing direction. When completed, IceTop will have approximately 500 square meters of ice Cherenkov collecting area arranged in an array of 80 stations on a 125 m triangular grid to detect air showers from one PeV to one EeV. Each station consists of two, two meter diameter tanks filled with ice to a depth of 90 cm. Tanks are instrumented with two Digital Optical Modules (DOM) operated at different gain settings to provide appropriate dynamic range to cover both large and small air showers. Each DOM contains a 10 inch photomultiplier and an advanced readout system capable of digitizing the full waveform. For historical reasons, the two discriminator counting rates recorded in each DOM are termed SPE (Single Photo Electron), and MPE (Multi Photo Electron). In the present analysis the SPE threshold corresponds approximately to 20 photoelectrons (PE), and the MPE threshold to 100 PE. Due to the high altitude (2835m) and the nearly zero geomagnetic cutoff at the South Pole, secondary particle spectra at the detector retain a significant amount of information on the spectra of the primary particles. In a thin, ionization detector these secondary particles either would not interact, or would produce virtually indistinguishable signals. This is not the case in the thick Ice-Top detector, where a traversing muon produces 130 PE and the typical electron only 15 PE. Signal amplitude therefore carries information about the composition and spectra of the incident particles, albeit integrated over broad regions of the spectrum. In particular, differences in counting rates of discriminators at different thresholds allow us to infer the particle spectrum incident at the top of the atmosphere.

IceCube Collaboration; Klein, Spencer

2008-10-11T23:59:59.000Z

309

Assessing recovery from acidification of European surface waters in the year 2010:An evaluation of projections made with the MAGIC model in 1995  

Science Journals Connector (OSTI)

In 1999 we used the MAGIC (Model of Acidification of Groundwater In Catchments) model to project acidification of acid-sensitive European surface waters in the year 2010, given implementation of the Gothenburg Protocol to the Convention on Long-Range Transboundary Air Pollution (LRTAP). ...

Rachel Clare Helliwell; Richard F. Wright; Leah A. Jackson-Blake; Robert C. Ferrier; Julian Aherne; Bernard Jack Cosby; Christopher D. Evans; Martin Forsius; Jakub Hruska; Alan Jenkins; Pavel Krm; Jiri Kopacek; Vladimir Majer; Filip Moldan; Maximilian Posch; Jacqueline Potts; Michela Rogora; Wolfgang Schoepp

2014-10-17T23:59:59.000Z

310

A slippery surface that can repel almost everything An Unmet Need  

E-Print Network (OSTI)

contaminants from their surfaces when they roll-off. Despite over a decade of intense such as blood, crude oil, and brine. They also repel solids such as ice and wax

Wood, Robert

311

ERA-40 SST and Sea Ice Concentration Data  

SciTech Connect

The lower boundary condition of sea surface temperature (SST) and sea-ice concentration (sic) is a critical forcing of the lower frequencies in multi-decadal global atmospheric reanalyses such as ERA-40. Partly in response to the ERA-40 project, new SST/sic data sets have been developed that are considerably improved over those available to the first-generation reanalyses. This paper documents the input SST/sic data sets and the processing that created the daily SST/sic specification for the ERA-40 period 1956-2001. The source data are: (1) the monthly mean HadISST data set from the UKMO Hadley Centre for 1956-1981; and (2) the weekly NCEP 2DVAR data for 1982-present. Both data sets are reanalyses of satellite and conventional SST/sic observations. The principal reason for the higher quality of these source data sets is the use of a common consensus sic and a common sic-SST relationship in the sea ice margins. The use of a common sic resulted in a very smooth transition between HadISST and NCEP 2DVAR, despite differences in data assimilation techniques and monthly versus weekly analyses. No special action was required to insure consistency at the transition unlike as was necessary for the AMIP II experiment (Fiorino, 1997). The only special processing was application of the AMIP II mid-month calculation (Taylor et al., 2000) for the interpolation of monthly mean data to daily values. This scheme insures that the monthly mean of the daily-interpolated data is nearly identical to the input monthly mean. Detailed comparisons of the SST and sic during the HadISST-NCEP transition, and other long time series, are given. We also compare the NCEP 2DVAR (circa 2000) to a newer version of the OISST (V2, circa 2001) and demonstrate that the small differences should have no impact on the ERA-40 atmosphere reanalyses.

Fiorino, M

2001-08-27T23:59:59.000Z

312

Energy conservation potential of surface modification technologies  

SciTech Connect

This report assesses the energy conservation impact of surface modification technologies on the metalworking industries. The energy conservation impact of surface modification technologies on the metalworking industries is assessed by estimating their friction and wear tribological sinks and the subsequent reduction in these sinks when surface modified tools are used. Ion implantation, coatings, and laser and electron beam surface modifications are considered.

Le, H.K.; Horne, D.M.; Silberglitt, R.S.

1985-09-01T23:59:59.000Z

313

ICE Cleaning Test Report.PDF  

NLE Websites -- All DOE Office Websites (Extended Search)

16 16 FIELD DEMONSTRATION OF THE ICE 250 TM CLEANING SYSTEM AT THE ROCKY MOUNTAIN OILFIELD TESTING CENTER CASPER, WYOMING August 18-19, 1999 Date Published: October 5, 1999 J.L. Johnston L.M. Jackson PREPARED FOR THE UNITED STATES DEPARTMENT OF ENERGY/ROCKY MOUNTAIN OILFIELD TESTING CENTER Work Performed Under Rocky Mountain Oilfield Testing Center (RMOTC) CRADA No. 99-009 TABLE OF CONTENTS Abstract.............................................................................................................................................1 Introduction.......................................................................................................................................1 Product Description ...........................................................................................................................1

314

New physics with IceCube  

Science Journals Connector (OSTI)

IceCube, a cubic kilometer neutrino telescope, will be capable of probing neutrino-nucleon interactions in the ultrahigh energy regime, far beyond the energies reached by colliders. In this article we introduce a new observable that combines several advantages; it only makes use of the upward-going neutrino flux, so that the Earth filters the atmospheric muons, and it is only weakly dependent on the initial astrophysical flux uncertainties.

Matias M. Reynoso and Oscar A. Sampayo

2007-08-17T23:59:59.000Z

315

Drilling deep in South Pole Ice  

E-Print Network (OSTI)

To detect the tiny flux of ultra-high energy neutrinos from active galactic nuclei or from interactions of highest energy cosmic rays with the microwave background photons needs target masses of the order of several hundred cubic kilometers. Clear Antarctic ice has been discussed as a favorable material for hybrid detection of optical, radio and acoustic signals from ultra-high energy neutrino interactions. To apply these technologies at the adequate scale hundreds of holes have to be drilled in the ice down to depths of about 2500 m to deploy the corresponding sensors. To do this on a reasonable time scale is impossible with presently available tools. Remote drilling and deployment schemes have to be developed to make such a detector design reality. After a short discussion of the status of modern hot water drilling we present here a design of an autonomous melting probe, tested 50 years ago to reach a depth of about 1000 m in Greenland ice. A scenario how to build such a probe today with modern technologies...

Karg, Timo

2014-01-01T23:59:59.000Z

316

ICE LINES IN CIRCUMBINARY PROTOPLANETARY DISKS  

SciTech Connect

I examine the position of the ice line in circumbinary disks heated by steady mass accretion and stellar irradiation and compare with the critical semimajor axis, interior to which planetary orbits are unstable. There is a critical binary separation, dependent on the binary parameters and disk properties, for which binaries with separations larger than this critical value have ice lines that lie interior to the boundary of stability. For an equal-mass binary comprised of 1 M{sub Sun} components, this critical separation is Almost-Equal-To 1.04 AU, and scales weakly with mass accretion rate and Rosseland mean opacity ({proportional_to}[ M-dot {kappa}{sub R}]{sup 2/9}). Assuming a steady mass accretion rate of M-dot {approx}10{sup -8} M{sub Sun} yr{sup -1} and a Rosseland mean opacity of {kappa}{sub R} {approx} 1 cm{sup 2} g{sup -1}, I show that {approx}> 80% of all binary systems with component masses M{sub *} {approx}< 2.0 M{sub Sun} have ice lines that lie interior to the critical semimajor axis. This suggests that rocky planets should not form in these systems, a prediction which can be tested by looking for planets around binaries with separations larger than the critical separation with Kepler (difficult) and with microlensing.

Clanton, Christian, E-mail: clanton@astronomy.ohio-state.edu [Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH 43210 (United States)

2013-05-01T23:59:59.000Z

317

Radiation Dry Bias in the TWP-ICE Radiosonde Soundings Solar Zenith Angle Correction Factor  

NLE Websites -- All DOE Office Websites (Extended Search)

Radiation Dry Bias in the TWP-ICE Radiosonde Soundings Radiation Dry Bias in the TWP-ICE Radiosonde Soundings Solar Zenith Angle Correction Factor Figure 3: Ratio of MWR TCWV to radiosonde derived TCWV, and the solar zenith angle at the radiosonde launch time (black dots). The dry bias observed in sonde TCWV values is mainly attributable to a dry RH bias near the surface The red dots show the 1000 hPa RH correction factors suggested by Voemel et al for sondes launched near noon (10-30 degree solar zenith angle), and at night time (90 degree zenith angle). The green line shows a modified RH correction factor which is a function of the solar zenith angle. ● During the day-time, the TCWV bias is significantly smaller when the zenith angle correction is applied than when no correction, or only the Crad and Ccal corrections are applied.

318

NOAA Technical Memorandum ERL GLERL-20 SUMMARY OF GREAT LAKES WEATHER AND ICE CONDITIONS,  

E-Print Network (OSTI)

Cooling Phase 3.2.2 Ice Formation and Breakup Phases 3.2.3 The Ice Cycle on Lake Superior 3.2.4 The IceNOAA Technical Memorandum ERL GLERL-20 SUMMARY OF GREAT LAKES WEATHER AND ICE CONDITIONS, WINTER of this NOAA Environmental Research Laboratories publication. ii #12;LANDSAT fake color image of ice cover

319

Changes of Myofibrillar Proteins and Texture in Freshwater Prawn, Macrobrachium rosenbergii, During Iced Storage  

E-Print Network (OSTI)

in an ice slurry. Upon death, whole prawns were stored in slush ice in an insulated container at O°C. After, During Iced Storage H. W. KYE, W. K. NIP and J. H. MOY Introduction Shelf life of ice-chilled freshwater in penaid shrimp dur ing iced storage and demonstrated myo fibrillar breakdown, especially Z

320

NAO influence on net sea ice production and exchanges in the Arctic region: a numerical study  

E-Print Network (OSTI)

ice cover suppresses the development of thermal insulation during the ice formation processNAO influence on net sea ice production and exchanges in the Arctic region: a numerical study Aixue The variability of net sea ice production and sea ice exchange between the Arctic and its adjacent seas

Hu, Aixue

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

HiRISE observations of new impact craters exposing Martian ground ice  

E-Print Network (OSTI)

ice rather than ice-cemented regolith. Although some clean ice may be produced by the impact processHiRISE observations of new impact craters exposing Martian ground ice Colin M. Dundas1 , Shane craters or clusters have been observed to excavate bright material inferred to be ice at mid

Byrne, Shane

322

Frostbite Theater - Liquid Nitrogen Experiments - Dry Ice vs. Liquid  

NLE Websites -- All DOE Office Websites (Extended Search)

Egg + Liquid Nitrogen + Time-lapse! Egg + Liquid Nitrogen + Time-lapse! Previous Video (Egg + Liquid Nitrogen + Time-lapse!) Frostbite Theater Main Index Next Video (Liquid Nitrogen Cooled Dry Ice in Water!) Liquid Nitrogen Cooled Dry Ice in Water! Dry Ice vs. Liquid Nitrogen! Dry ice is cold. Liquid nitrogen is cold, too. What happens when the two are mixed together? [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: Have you ever wondered what happens when you mix dry ice and liquid nitrogen? Steve: Well, we just happen to have a chunk of dry ice left over from when we filmed 'How to Make a Cloud Chamber,' and here at Jefferson Lab, liquid nitrogen flows like water, so we're going to find out!

323

ARM - Publications: Science Team Meeting Documents: Investigation of Ice  

NLE Websites -- All DOE Office Websites (Extended Search)

Investigation of Ice Crystal Shapes Using Multi-resolution Techniques Investigation of Ice Crystal Shapes Using Multi-resolution Techniques McFarquhar, Greg University of Illinois Better knowledge of small-scale features from ice crystals are needed to determine their effects on radiation and hence to improve the treatment of clouds in climate models. With the Cloud Particle Imager (CPI) it is now possible to capture ice crystal images with 2.3 μm resolution and 256 gray scales of illumination, providing an unprecedented wealth of information to utilize in the ongoing quest to understand the small scale structure of ice crystals. In this study, we applied wavelet and fractal analysis to CPI images of ice crystals collected in cirrus by the University of North Dakota Citation during the Intensive Observation Period at the Southern

324

STATEMENT OF WORK (SOW) TEMPLATE FOR ICE SUPPORT CONTRACTOR  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ICE SUPPORT CONTRACTOR ICE SUPPORT CONTRACTOR The template presented below is a Statement of Work (SOW) for services of an ICE Support Contractor for assisting OECM in conducting an ICE. Project and review specific information should be incorporated. Explanatory text appears in italics, while information that should be selected appears in >. The format and contents of this SOW is not compulsory, and the use is at the discretion of the OECM Analysts, tailored as appropriate for the desired contractor support activities. If no contractor support is required, this appendix is not used. Statement of Work for Independent Cost Estimate (ICE) > <ICE (i.e., Alternative Selection and Cost Range (CD-1), Establish

325

Combinatorial Materials Research Applied to the Development of New Surface Coatings I:? A Multiwell Plate Screening Method for the High-Throughput Assessment of Bacterial Biofilm Retention on Surfaces  

Science Journals Connector (OSTI)

The screening process involves (1) multiwell plate modifications for coating deposition, (2) deposition of combinatorial coating libraries via an automated liquid dispensing robot, (3) coating thickness measurements of cured coatings, (4) preconditioning of coatings via immersion in deionized water, (5) bacterial incubation, (6) plate processing, and (7) data analysis for identification of promising candidates. ... This clearly perceptible increase recorded since 1982, may be attributable to the growing use of copper paints subsequent to the antifouling paint regulations adopted in 1982. ... that can be applied with both lethal and sublethal effect criteria for the detn. of toxic stress from leaches of painted surfaces. ...

Shane J. Stafslien; James A. Bahr; Jason M. Feser; Jonathan C. Weisz; Bret J. Chisholm; Thomas E. Ready; Philip Boudjouk

2005-12-31T23:59:59.000Z

326

IceCube Project Monthly Report August 2005  

E-Print Network (OSTI)

IceCube Project Monthly Report August 2005 Accomplishments All of the DOMs installed at the South additional emphasis on training and procedures. The training program for IceCube personnel scheduled to work-05 S-05 O-05 N-05 D-05 J-06 F-06 M-06 3&4 FY06 FY07 FY08 FY09 FY10 FY11 IceCube Project Baseline

Saffman, Mark

327

ICE CORES | History of Research, Greenland and Antarctica  

Science Journals Connector (OSTI)

Abstract Ice samples collected from polar ice sheets have been used to study past climate changes going almost as far back as 1My. The first ice core projects in the 1960s identified major climate transitions. Subsequent projects have shown that abrupt climate changes have occurred many times in the past and that there is a close link between high levels of atmospheric carbon dioxide and warm climate conditions.

M. Aydin

2013-01-01T23:59:59.000Z

328

ICE CORES | History of Research, Greenland and Antarctica  

Science Journals Connector (OSTI)

Ice samples collected from the polar ice sheets have been used to study past climate changes during the last million years. The first ice-core projects in the 1960s identified the major climate periods. Subsequent projects have shown that abrupt climate changes have occurred many times in the past and that there is a close link between high levels of atmospheric carbon dioxide and warm climate conditions.

K. Taylor

2007-01-01T23:59:59.000Z

329

Analytical determination of propeller performance degradation due to ice accretion  

E-Print Network (OSTI)

trajectory code. Unlike the Bragg code, the effects of compressibility, kinetic heating, and water runback are taken into account in this code, thus making it applicable to both rime and glaze ice conditions. Designed to be applied to helicopter config...- ' urations, the code employs a heat balance analysis to calculate the kinetic heating and runback effects. The authors have reported good agreement between predicted and experimentally obtained ice shapes, tem- perature distributions, and icing threshold...

Miller, Thomas Lloyd

1984-01-01T23:59:59.000Z

330

Argonne Lab Director Peter Littlewood accepts Ice Bucket Challenge...  

NLE Websites -- All DOE Office Websites (Extended Search)

Argonne Lab Director Peter Littlewood accepts Ice Bucket Challenge Share Browse By - Any - Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering...

331

Optimal Control of Harvesting Ice Thermal Storage Systems  

E-Print Network (OSTI)

for optimal control of a harvesting ice storage system. A simplified procedure is used to develop 24 hour load data. Example installations will be shown....

Knebel, D. E.

1988-01-01T23:59:59.000Z

332

Heterogeneous ice nucleation and water uptake by field-collected...  

NLE Websites -- All DOE Office Websites (Extended Search)

properties through heterogeneous nucleation is not well understood. Heterogeneous ice nucleation and water uptake by ambient particles collected from urban environments in...

333

Ice structure monitoring with an optical fiber sensing system  

Science Journals Connector (OSTI)

Ice has been used as an effective and economical material for constructions of roads and platforms in cold regions. However, the practical applications of this brittle material are limited by the fact that ice structures can suddenly crack due to low tensile strength, be crushed due to excessive compression, melt and become soften as temperature elevates. In this paper, an early warning system is proposed to monitor the strain state and damage characteristic of ice structures. Firstly, both fiber Bragg grating (FBG) and Brillouin optical time domain analysis/reflectometry (BOTDA/R) sensors were installed in an ice block and an ice beam to understand their axial and flexural behaviors under a concentrated load. Secondly, the solution for strain state and damage process of ice structures was derived analytically under test conditions. Finally, an outdoor ice road test bed was built and continuously monitored for 34h to validate the early warning system and understand the early stage behavior of ice structures. The experimental results agreed well with their corresponding theoretical predictions. The early warning system with optical sensors is effective and practical for long-term monitoring for ice structures.

Zhi Zhou; Minghua Huang; Jianping He; Genda Chen; Jinping Ou

2010-01-01T23:59:59.000Z

334

ARM-UAV TWP-ICE Activities and Data  

NLE Websites -- All DOE Office Websites (Extended Search)

instrument operational status, data availability and daily flight details for the ARM-UAV Proteus payload flown during the TWP-ICE experiment are presented. Data was also...

335

Covered Product Category: Air-Cooled Ice Machines  

Energy.gov (U.S. Department of Energy (DOE))

The Federal Energy Management Program (FEMP) provides acquisition guidance for air-cooled ice machines, which are covered by the ENERGY STAR program.

336

IceCube: A Cubic Kilometer Radiation Detector  

SciTech Connect

IceCube is a 1 km{sup 3} neutrino detector now being built at the Amudsen-Scott South Pole Station. It consists of 4800 Digital Optical Modules (DOMs) which detect Cherenkov radiation from the charged particles produced in neutrino interactions. IceCube will observe astrophysical neutrinos with energies above about 100 GeV. IceCube will be able to separate {nu}{sub {mu}}, {nu}{sub t}, and {nu}{sub {tau}} interactions because of their different topologies. IceCube construction is currently 50% complete.

IceCube Collaboration; Klein, Spencer R; Klein, S.R.

2008-06-01T23:59:59.000Z

337

Sandia National Laboratories: Ice-Sheet Simulation Code Matures...  

NLE Websites -- All DOE Office Websites (Extended Search)

and Antarctic Ice Sheets, with particular attention to their contributions to global sea-level rise. Our recent highlight is the successful completion of a controlled mesh...

338

Team advances understanding of the Greenland Ice Sheet's meltwater...  

NLE Websites -- All DOE Office Websites (Extended Search)

for Greenland in the future, but its impact on ice sheet flux and associated sea level rise is uncertain: direct observations of the subglacial drainage system are lacking...

339

Reducing uncertainty in high-resolution sea ice models.  

SciTech Connect

Arctic sea ice is an important component of the global climate system, reflecting a significant amount of solar radiation, insulating the ocean from the atmosphere and influencing ocean circulation by modifying the salinity of the upper ocean. The thickness and extent of Arctic sea ice have shown a significant decline in recent decades with implications for global climate as well as regional geopolitics. Increasing interest in exploration as well as climate feedback effects make predictive mathematical modeling of sea ice a task of tremendous practical import. Satellite data obtained over the last few decades have provided a wealth of information on sea ice motion and deformation. The data clearly show that ice deformation is focused along narrow linear features and this type of deformation is not well-represented in existing models. To improve sea ice dynamics we have incorporated an anisotropic rheology into the Los Alamos National Laboratory global sea ice model, CICE. Sensitivity analyses were performed using the Design Analysis Kit for Optimization and Terascale Applications (DAKOTA) to determine the impact of material parameters on sea ice response functions. Two material strength parameters that exhibited the most significant impact on responses were further analyzed to evaluate their influence on quantitative comparisons between model output and data. The sensitivity analysis along with ten year model runs indicate that while the anisotropic rheology provides some benefit in velocity predictions, additional improvements are required to make this material model a viable alternative for global sea ice simulations.

Peterson, Kara J.; Bochev, Pavel Blagoveston

2013-07-01T23:59:59.000Z

340

A new ice thickness and bedrock data set for the Greenland ice sheet. R.L. Layberry, J.L. Bamber,  

E-Print Network (OSTI)

combined with data collected by the Technical University of Denmark in the 1970's to produce a new iceA new ice thickness and bedrock data set for the Greenland ice sheet. R.L. Layberry, J.L. Bamber of Kansas, Lawrence, KS 66045, 785/864-2700, U.S. Abstract - Ice thickness data collected between 1993

Kansas, University of

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


341

Integrated tephrochronology of the West Antarctic region-Implications for a potential tephra record in the West Antarctic Ice Sheet (WAIS) Divide Ice Core  

E-Print Network (OSTI)

(tephra) and aerosols , produced during major explosive eruptions. Tephra layers in ice cores can provide record in the West Antarctic Ice Sheet (WAIS) Divide Ice Core N.W. Dunbar,1 W.C. McIntosh,1 A.V. Kurbatov@albion.edu) Ice cores from polar regions, in addition to being a climate archives, also capture volcanic particles

Dunbar, Nelia W.

342

Modeling the High-Frequency Component of Arctic Sea Ice Drift and Deformation  

Science Journals Connector (OSTI)

Buoy observations of sea ice drift show that sea ice motion and deformation contain substantial high-frequency variability at subdaily timescales. However, numerical simulations of the sea ice dynamics normally do not include processes on such ...

Petra Heil; William D. Hibler III

2002-11-01T23:59:59.000Z

343

E-Print Network 3.0 - aircraft icing training Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Summary: effects on aircraft performance. Although anti-icing devices such as de-icing boots and heating strips... help, ice accretions can still build up and affect the aircraft...

344

Fractionation of Dissolved Solutes and Chromophoric Dissolved Organic Matter During Experimental Sea Ice Formation.  

E-Print Network (OSTI)

In the past decade there has been an overall decrease in Arctic Ocean sea ice cover. Changes to the ice cover have important consequences for organic carbon cycling, especially over the continental shelves. When sea ice is formed, dissolved organic...

Smith, Stephanie 1990-

2012-04-16T23:59:59.000Z

345

Dynamics of ice shelf rift propagation and iceberg calving inferred from geodetic and seismic observations  

E-Print Network (OSTI)

ice at the base of the ice shelf could produce a thicknessthat may produce larger amounts of marine ice near one riftice shelf com- bined with large Antarctic storm systems can produce

Bassis, Jeremy N.

2007-01-01T23:59:59.000Z

346

The Little Ice Age as Recorded in the Stratigraphy of the Tropical Quelccaya Ice Cap  

Science Journals Connector (OSTI)

...1500-YEAR RECORD OF TROPICAL PRECIPITATION IN ICE CORES FROM THE...values associated with winter snowfall (5). Sum-mer...During the eruptive phase, 19 February to 6 March...than 80% ofthe annual precipitation falls in the wet season...analysis, K. Doddroe for typing and R. Tope for the...

L. G. THOMPSON; E. MOSLEY-THOMPSON; W. DANSGAARD; P. M. GROOTES

1986-10-17T23:59:59.000Z

347

Probing leptoquark production at IceCube  

Science Journals Connector (OSTI)

We emphasize the inelasticity distribution of events detected at the IceCube neutrino telescope as an important tool for revealing new physics. This is possible because the unique energy resolution at this facility allows to separately assign the energy fractions for emergent muons and taus in neutrino interactions. As a particular example, we explore the possibility of probing second and third generation leptoquark parameter space (coupling and mass). We show that production of leptoquarks with masses ?250??GeV and diagonal generation couplings of O(1) can be directly tested if the cosmic neutrino flux is at the Waxman-Bahcall level.

Luis A. Anchordoqui; Carlos A. Garca Canal; Haim Goldberg; Daniel Gomez Dumm; Francis Halzen

2006-12-29T23:59:59.000Z

348

The first Greenland ice core record of methanesulfonate and sulfate over a full glacial cycle  

E-Print Network (OSTI)

sulf,te in the Dye 3 and Camp Century, Greenland ice cores,in both the Dye 3 and Camp Century deep ice cores [Herron

Hansson, Margareta E; Saltzman, Eric S

1993-01-01T23:59:59.000Z

349

Experimental Investigation of Energy Losses due to Icing of a Wind Turbine  

Science Journals Connector (OSTI)

Ice accretion and irregular shedding cause many potential problems during turbine operation. For example, icing causes large load imbalances; creates excessive turbine vibration; can change the natural frequen...

Xin Wang; Eric L. Bibeau

2007-01-01T23:59:59.000Z

350

Investigation of how Insulation affects the pipe system in the soil for ice rinks.  

E-Print Network (OSTI)

?? In Sweden, ice rinks are one of the largest energy consumers in the public building sector, requiring, each ice rink, about 1050 MWh/year, from (more)

Marco Estruc, Ignacio

2014-01-01T23:59:59.000Z

351

Extraction of the seabed reflectivity function using ice cracking noise as a signal source  

Science Journals Connector (OSTI)

A technique is described for measuring the reflection coefficient of the Arctic seabed with a single vertical array of hydrophones. Naturally occurring icecrackingnoises were used as the acoustic sources. This method circumvents the difficulties and expense of introducing artificial sound sources through the thick Arctic pack ice. The measurements were made in April 1988 with a 22?element array suspended from the ice in 420 m of water. The range of the source is first determined using the direct arrival and multiple reflections from the seabed and underice surface. Then the source directivity is parametrized using the direct arrival path only and extrapolated to reflected path angles. A plot of the reflection coefficient versus grazing angle clearly indicates the value of the critical angle. The sound speed of the sea bottom corresponding to this critical angle agrees well with that measured from a bottom grab sample taken during the field trip. Finally an interesting phenomenon was an anomalous increase of the received pressure level around a grazing angle of 60. This is associated with a leaky plate wave radiating at the icewater interface.

Pierre Zakarauskas; Ronald I. Verrall; Michael V. Greening

1993-01-01T23:59:59.000Z

352

Multispectral imaging contributions to global land ice measurements from space  

E-Print Network (OSTI)

, Germany j National Snow and Ice Data Center, University of Colorado, 449 UCB, Boulder, CO 80309, USA k development by GLIMS is geared toward mapping clean- ice and debris-covered glaciers; terrain classification are compatible with and expanded from those of the World Glacier Inventory (WGI). These technology efforts

Kääb, Andreas

353

IceCube Project Monthly Report September 2005  

E-Print Network (OSTI)

IceCube Project Monthly Report September 2005 Accomplishments All of the IceCube Digital Optical the long- term project goals of 90% first pass yield and 95% ultimate yield. The additional data handling at the Pole and one at McMurdo. The drilling procedures are nearing completion. A final review and sign

Saffman, Mark

354

Gravitational Separation of Gases and Isotopes in Polar Ice Caps  

Science Journals Connector (OSTI)

...reported that 02 trapped in 2000-year-old ice from Camp Century, Green-land, has an 180/160 enrichment given by...values for 02 in 6,100-and 20,000-year-old Camp Century ice (1), and noting that mean seawater was enriched...

H. Craig; Y. Horibe; T. Sowers

1988-12-23T23:59:59.000Z

355

Increase of Atmospheric Methane Recorded in Antarctic Ice Core  

Science Journals Connector (OSTI)

...obtained by Rasmussen and Khalil with ice samples from Camp Century (77011'N, 61009'W), Crete (71 07'N, 37 19'W...however, this difference is 130 years for ice from Camp Century, 200 years for Crete, and 240 years for Byrd Station...

B. STAUFFER; G. FISCHER; A. NEFTEL; H. OESCHGER

1985-09-27T23:59:59.000Z

356

Floating Glacial Ice Caps in the Arctic Ocean  

Science Journals Connector (OSTI)

...obtained from isotopic studies of the Camp Century ice core. The second is based...obtained from isotopic studies of the Camp Century ice core. The second is based...Arctic Ocean Arctic region benthonic Camp Century Cenozoic cores deep-sea evidence...

Wallace S. Broecker

1975-06-13T23:59:59.000Z

357

Proton ordering in tetragonal and monoclinic H2O ice  

E-Print Network (OSTI)

H2O ice remains one of the most enigmatic materials as its phase diagram reveals up to sixteen solid phases. While the crystal structure of these phases has been determined, the phase boundaries and mechanisms of formation of the proton-ordered phases remain unclear. From high precision measurements of the complex dielectric constant, we probe directly the degree of ordering of the protons in H2O tetragonal ice III and monoclinic ice V down to 80 K. A broadened first-order phase transition is found to occur near 202 K we attribute to a quenched disorder of the protons which causes a continuous disordering of the protons during cooling and metastable behavior. At 126 K the protons in ice III become fully ordered, and for the case of ice V becoming fully ordered at 113 K forming ice XIII. Two triple points are proposed to exist: one at 0.35 GPa and 126 K where ices III, IX and V coexist; and another at 0.35 GPa and 113 K where ices V, IX and XIII coexist. Our findings unravel the underlying mechanism driving th...

Yen, Fei; Berlie, Adam; Liu, Xiaodi; Goncharov, Alexander F

2015-01-01T23:59:59.000Z

358

Solvent Selection Use dry ice/isopropanol for cooling baths  

E-Print Network (OSTI)

Solvent Selection Use dry ice/isopropanol for cooling baths Reaches essentially the same temperature as dry ice/acetone (-77°C vs. -78°C), but the lower volatility of isopropanol minimizes vapor a closed-loop cooling system for condensers Closed-loop cooling systems eliminate wastewater and accidental

Chan, Hue Sun

359

Trigonal ice crystals in Earths atmosphere  

Science Journals Connector (OSTI)

We are all familiar with the hexagonal shape of snow and ice crystals, and it is well established that their six-fold symmetry is derived from the arrangement of water molecules in a hexagonal crystal structure. However, atmospheric ice crystals with only ...

Benjamin J. Murray; Christoph G. Salzmann; Andrew J. Heymsfield; Steven Dobbie; Ryan R. Neely--III; Christopher J. Cox

360

IceCube Project Monthly Report -April 2010 Accomplishments  

E-Print Network (OSTI)

1 IceCube Project Monthly Report - April 2010 Accomplishments · The IceCube Software Water Drill equipment (http://www.icecube.wisc.edu/disposition/index.php) and the site was circulated at Uppsala University are using Deep Core DOMs as flashers and receivers for low-intensity flasher runs

Saffman, Mark

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

ENERGY BASED ICE COLLISION FORCES Claude Daley1  

E-Print Network (OSTI)

ENERGY BASED ICE COLLISION FORCES Claude Daley1 1 Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1C 3X5 ABSTRACT Ice collision forces can be determined by energy considerations. A variety of interaction geometry cases are considered. The indentation energy functions for eight different

Daley, Claude

362

ENERGY BASED ICE COLLISION FORCES Claude Daley1  

E-Print Network (OSTI)

1 ENERGY BASED ICE COLLISION FORCES Claude Daley1 1 Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1C 3X5 ABSTRACT Ice collision forces can be determined by energy considerations. A variety of interaction geometry cases are considered. The indentation energy functions for eight different

Daley, Claude

363

POLAR SEA-ICE CLASSIFICATION USING ENHANCED RESOLUTION NSCAT DATA  

E-Print Network (OSTI)

POLAR SEA-ICE CLASSIFICATION USING ENHANCED RESOLUTION NSCAT DATA Q. P. Remund and D. G. Long of the scatterometer image reconstruction with filter (SIRF) algorithm. SIRF produces images of A and B where A is U is shown to have high correlation with the NSIDC SSM/I derived multiyear ice maps. INTRODUCTION Polar sea

Long, David G.

364

POLLEN DISPERSAL AND DEPOSITION ON THE QUELCCAYA ICE CAp, PERU  

E-Print Network (OSTI)

POLLEN DISPERSAL AND DEPOSITION ON THE QUELCCAYA ICE CAp, PERU Carl A. Reese and Kam-biu Liu: The relatively young science of tropical ice-core palynology has proven effective in the study of paleoenvironments by its ability to produce long-term and high- resolution paleoclimatic data. However, no studies

Liu, Kam-biu

365

Effectsof ice-crystal structure on halo formation: cirrus cloud  

E-Print Network (OSTI)

Effectsof ice-crystal structure on halo formation: cirrus cloud experimental and ray campaign, four 220halo-producing cirrus clouds were studied jointly from a ground- based polarization lidar of the aircraft, which collecteda total of 84slides byimpaction, preserving the ice crystals for later microscopic

Takano, Yoshihide

366

Has the ice man arrived? Tact on the Internet  

E-Print Network (OSTI)

Has the ice man arrived? Tact on the Internet Jonathan Grudin, UC Irvine and Microsoft Research. Eugene O'Neill's play The Ice Man Cometh outlines a series of calamities that occur when his characters the graded corrections via e- mail. The students produced a counter- proposal: After grading an exercise

Hearst, Marti

367

Sea Ice Enhancements to Polar WRF* Keith M. Hines1**  

E-Print Network (OSTI)

covering Europe and the Arctic Ocean demonstrate remote impacts of Arctic sea ice thickness on18 midSea Ice Enhancements to Polar WRF* Keith M. Hines1** , David H. Bromwich,1,2 , Lesheng Bai1 model (Polar WRF), a polar-optimized version of2 WRF, is developed by and available to the community

Howat, Ian M.

368

Optimization of Ice Thermal Storage Systems Design for HVAC Systems  

E-Print Network (OSTI)

Ice thermal storage is promising technology to reduce energy costs by shifting the cooling cost from on-peak to off-peak periods. The paper discusses the optimal design of ice thermal storage and its impact on energy consumption, demand, and total...

Nassif, N.; Hall, C.; Freelnad, D.

2013-01-01T23:59:59.000Z

369

IceCube Collaboration Contributions to ARENA 2008  

E-Print Network (OSTI)

Contributions of the IceCube Collaboration to the 3rd International Workshop on Acoustic and Radio EeV Neutrino detection Activities (ARENA 2008). The conference was held at Roma University "Sapienza," June 25-27, 2008, in Rome, Italy. This is an html index of the IceCube Collaboration contributions, with clickable links to the individual papers.

IceCube Collaboration

2008-11-15T23:59:59.000Z

370

Total reflection infrared spectroscopy of water-ice and frozen aqueous NaCl solutions  

SciTech Connect

Liquid-like and liquid water at and near the surface of water-ice and frozen aqueous sodium chloride films were observed using attenuated total reflection infrared spectroscopy (ATR-IR). The concentration of NaCl ranged from 0.0001 to 0.01 M and the temperature varied from the melting point of water down to 256 K. The amount of liquid brine at the interface of the frozen films with the germanium ATR crystal increased with salt concentration and temperature. Experimental spectra are compared to reflection spectra calculated for a simplified morphology of a uniform liquid layer between the germanium crystal and the frozen film. This morphology allows for the amount of liquid observed in an experimental spectrum to be converted to the thickness of a homogenous layer with an equivalent amount of liquid. These equivalent thickness ranges from a nanometer for water-ice at 260 K to 170 nm for 0.01 M NaCl close to the melting point. The amounts of brine observed are over an order of magnitude less than the total liquid predicted by equilibrium thermodynamic models, implying that the vast majority of the liquid fraction of frozen solutions may be found in internal inclusions, grain boundaries, and the like. Thus, the amount of liquid and the solutes dissolved in them that are available to react with atmospheric gases on the surfaces of snow and ice are not well described by thermodynamic equilibrium models which assume the liquid phase is located entirely at the surface.

Walker, Rachel L.; Searles, Keith; Willard, Jesse A.; Michelsen, Rebecca R. H., E-mail: RMichelsen@rmc.edu [Department of Chemistry, Randolph-Macon College, P.O. Box 5005, Ashland, Virginia 23005 (United States)] [Department of Chemistry, Randolph-Macon College, P.O. Box 5005, Ashland, Virginia 23005 (United States)

2013-12-28T23:59:59.000Z

371

Fire in the Ice, Spring 2005  

NLE Websites -- All DOE Office Websites (Extended Search)

Marine Multi-Component Marine Multi-Component Seismology ............................ 1 Discovery of Possible Gas Hydrate Features ................... 5 Monitoring Station Update ..... 8 Announcements .................. 10 * Research Cruise Completed * Advisory Committee Meeting * Hot Ice Project Reports * Norway ICGH Meeting * Simulator Publicly Released * TOUGH-Fx/HYDRATE V 2.4 * AAPG Committee to Meet Spotlight on Research ........ 12 Scott Dallimore CONTACT POINT Ray Boswell National Energy Technology Laboratory (304) 285-4541 (304) 285-4216 fax Ray.Boswell@netl.doe.gov The Fire in the Ice Newsletter is also available online at our website www.netl.doe.gov/scngo/ NaturalGas/hydrates/index.html T H E N A T I O N A L E N E R G Y T E C H N O L O G Y L A B O R A T O R Y M E T H A N E H Y D R A T E N E W S L E T T E R Vol. 5, Iss. 2 ○ ○ ○ ○ ○

372

Magnetic charge crystals imaged in artificial spin ice  

NLE Websites -- All DOE Office Websites (Extended Search)

Magnetic charge crystals imaged in artificial spin ice Magnetic charge crystals imaged in artificial spin ice Magnetic charge crystals imaged in artificial spin ice Potential data storage and computational advances could follow August 27, 2013 Potential data storage and computational advances could follow A 3-D depiction of the honeycomb artificial spin ice topography after the annealing and cooling protocols. The light and dark colors represent the north and south magnetic poles of the islands. Image by Ian Gilbert, U. of I. Department of Physics and Frederick Seitz Materials Research Laboratory Contact Nancy Ambrosiano Communications Office (505) 667-0471 Email Siv Schwink U. Illinois (217) 300-2201 Email "The emergence of magnetic monopoles in spin ice systems is a particular case of what physicists call fractionalization, or deconfinement of

373

Ground-State Structures of Ice at High-Pressures  

E-Print Network (OSTI)

\\textit{Ab initio} random structure searching based on density functional theory is used to determine the ground-state structures of ice at high pressures. Including estimates of lattice zero-point energies, ice is found to adopt three novel crystal phases. The underlying sub-lattice of O atoms remains similar among them, and the transitions can be characterized by reorganizations of the hydrogen bonds. The symmetric hydrogen bonds of ice X and $Pbcm$ are initially lost as ice transforms to structures with symmetries $Pmc2_1$ (800 - 950 GPa) and $P2_1$ (1.17 TPa), but they are eventually regained at 5.62 TPa in a layered structure $C2/m$. The $P2_1 \\rightarrow C2/m$ transformation also marks the insulator-to-metal transition in ice, which occurs at a significantly higher pressure than recently predicted.

McMahon, Jeffrey M

2011-01-01T23:59:59.000Z

374

Search for Galactic PeV gamma rays with the IceCube Neutrino Observatory  

Science Journals Connector (OSTI)

Gamma-ray induced air showers are notable for their lack of muons, compared to hadronic showers. Hence, air shower arrays with large underground muon detectors can select a sample greatly enriched in photon showers by rejecting showers containing muons. IceCube is sensitive to muons with energies above ?500??GeV at the surface, which provides an efficient veto system for hadronic air showers with energies above 1PeV. One year of data from the 40-string IceCube configuration was used to perform a search for point sources and a Galactic diffuse signal. No sources were found, resulting in a 90%C.L. upper limit on the ratio of gamma rays to cosmic rays of 1.210-3 for the flux coming from the Galactic plane region (-80?l?-30; -10?b?5) in the energy range 1.26.0PeV. In the same energy range, point source fluxes with E-2 spectra have been excluded at a level of (E/TeV)2d?/dE?10-1210-11??cm-2?s-1?TeV-1 depending on source declination. The complete IceCube detector will have a better sensitivity (due to the larger detector size), improved reconstruction, and vetoing techniques. Preliminary data from the nearly final IceCube detector configuration have been used to estimate the 5-yr sensitivity of the full detector. It is found to be more than an order of magnitude better, allowing the search for PeV extensions of known TeV gamma-ray emitters.

M. G. Aartsen et al. (IceCube Collaboration)

2013-03-20T23:59:59.000Z

375

Regenerator?based thermoacoustic refrigerator for ice cream storage applications  

Science Journals Connector (OSTI)

A regenerator?based chiller has been built in the bellows bounce style [J. Acoust. Soc. Am. 112 15 (2002)] to replace the vapor compression system in an ice cream sales cabinet. It utilizes a 6?in.?diam metal bellows to form a compliant cavity that contains the dynamic pressure oscillation (>50?kPa). The stiffness of the gas trapped in the bellows is resonated against the mass of the bellows?cap and the mass of a moving?magnet linear motor which is capable of high (>85%) electro?acoustic efficiency. A second resonator operated well below its natural frequency uses the gas stiffness of a 1?l volume nested within the bellows and the inertia of an ordinary loudspeaker cone to create the pressure difference across the regenerator that drives gas flow that is in?phase with pressure. The mass of the cone can be adjusted to vary the multiplication factor that is typically 5%10% greater than the dynamic pressure within the bellows. The loudspeaker cone suffers none of the hydrodynamic losses associated with an acoustic inertance and eliminates problems with dc gas flow in the energy feedback path. The cold heat exchanger forms one surface of the pressure vessel permitting direct contact with any thermal load. [Work supported by Ben and Jerrys Homemade.

2003-01-01T23:59:59.000Z

376

Ice in Clouds ExperimentLayer Clouds. Part I: Ice Growth Rates Derived from Lenticular Wave Cloud Penetrations  

Science Journals Connector (OSTI)

Lenticular wave clouds are used as a natural laboratory to estimate the linear and mass growth rates of ice particles at temperatures from ?20 to ?32C and to characterize the apparent rate of ice nucleation at water saturation at a nearly ...

Andrew J. Heymsfield; Paul R. Field; Matt Bailey; Dave Rogers; Jeffrey Stith; Cynthia Twohy; Zhien Wang; Samuel Haimov

2011-11-01T23:59:59.000Z

377

Estimating the Sea Ice Compressive Strength from Satellite-Derived Sea Ice Drift and NCEP Reanalysis Data  

Science Journals Connector (OSTI)

Satellite-derived sea ice drift maps and sea level pressure from reanalysis data are used to infer upper and lower bounds on the large-scale compressive strength of Arctic sea ice. To this end, the two datasets are searched for special situations ...

L-B. Tremblay; M. Hakakian

2006-11-01T23:59:59.000Z

378

Breaking the ice: de-icing power transmission lines with high-frequency, high-voltage excitation  

E-Print Network (OSTI)

Breaking the ice: de-icing power transmission lines with high-frequency, high-voltage excitation of this work in other works must be obtained from the IEEE. #12;CING OF POWER TRANSMISSION lines during winter that applies 33-kV, 100-kHz power. TheoverallsystemisillustratedinFigure1.Itcouldbede- ployed in two different

379

2009 Community Sequencing Program: Life Under Ice  

SciTech Connect

A JGI Multimedia Presentation: Buried deep beneath the surface of Antarctica is a fresh water lake, Lake Vostok.

Victo Kunin, PhD (Project co-PI) [Project co-PI; Microbial Ecology Group, DOE JGI; Phil Hugenholtz, PhD (CSP Project PI) [CSP Project PI; Microbial Ecology Program Head, DOE JGI

2008-09-25T23:59:59.000Z

380

IceCube: An Instrument for Neutrino Astronomy  

E-Print Network (OSTI)

Neutrino astronomy beyond the Sun was first imagined in the late 1950s; by the 1970s, it was realized that kilometer-scale neutrino detectors were required. The first such instrument, IceCube, is near completion and taking data. The IceCube project transforms a cubic kilometer of deep and ultra-transparent Antarctic ice into a particle detector. A total of 5,160 optical sensors are embedded into a gigaton of Antarctic ice to detect the Cherenkov light emitted by secondary particles produced when neutrinos interact with nuclei in the ice. Each optical sensor is a complete data acquisition system, including a phototube, digitization electronics, control and trigger systems and LEDs for calibration. The light patterns reveal the type (flavor) of neutrino interaction and the energy and direction of the neutrino, making neutrino astronomy possible. The scientific missions of IceCube include such varied tasks as the search for sources of cosmic rays, the observation of Galactic supernova explosions, the search for dark matter, and the study of the neutrinos themselves. These reach energies well beyond those produced with accelerator beams. The outline of this review is as follows: Neutrino Astronomy and Kilometer-Scale Detectors. High-Energy Neutrino Telescopes: Methodologies of Neutrino Detection. IceCube Hardware. High-Energy Neutrino Telescopes: Beyond Astronomy. Future Projects

Francis Halzen; Spencer R. Klein

2010-07-07T23:59:59.000Z

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Fire in the Ice, Summer 2004  

NLE Websites -- All DOE Office Websites (Extended Search)

R R Vol. 4, Iss. 3 ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ CONTENTS Gulf of Mexico Remote Observatory Update ............... 1 Hydrate Decomposition Studies at USGS .................... 5 NETL's HP View Cell Operational .......................... 10 Announcements .................. 13 * AAPG Hedberg Conference * JIP Drilling Delayed * TOUGH-Fx/HYDRATE v1.0 * Advisory Committee Meeting * Anaximander project Spotlight on Research ........ 16 Dr. Keith Kvenvolden CONTACT POINT Ray Boswell National Energy Technology Laboratory (304) 285-4541 (304) 285-4469 fax Ray.Boswell@netl.doe.gov The Fire in the Ice Newsletter is

382

Fire in the Ice, Fall 2004  

NLE Websites -- All DOE Office Websites (Extended Search)

4 4 ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ CONTENTS AAPG Hedberg Research Conference ............................ 1 Oak Ridge Facilities .............. 4 Relic Gas Hydrates of Northwestern Siberia ............. 8 Announcements .................. 11 * JIP Tests in the Gulf of Mexico * Planning Workshop Slated for Early Next Year Spotlight on Research ........ 12 Ingo Pecher CONTACT POINT Ray Boswell National Energy Technology Laboratory (304) 285-4541 (304) 285-4216 fax Ray.Boswell@netl.doe.gov The Fire in the Ice Newsletter is also available online at our website (http://www.netl.doe.gov/ scngo/Natural%20Gas/hydrates/)

383

Annual measurement of sea-ice thickness using an upward-looking sonar  

Science Journals Connector (OSTI)

... and the forms the ice takes are of great importance to operators in polar conditions. Offshore ...

Rick Hudson

1990-03-08T23:59:59.000Z

384

1 Microscopic and environmental controls on the spacing and thickness of segregated 2 ice lenses  

E-Print Network (OSTI)

water, and ice conspire with the prevailing environmental conditions 52 to produce macroscopic ice by Henry (2000). The first comprehensive and tractable model 57 for ice lens growth was produced by O1 Microscopic and environmental controls on the spacing and thickness of segregated 2 ice lenses 3

Rempel, Alan W.

385

Polar Sea Ice Mapping Using SeaWinds Data Hyrum S. Anderson and David G. Long  

E-Print Network (OSTI)

of Bayes detection to produce sea ice extent maps. Statistical models for sea ice and ocean are represented information is incorpo- rated through the loss terms associated with Bayes risk. Sea ice extent maps producedPolar Sea Ice Mapping Using SeaWinds Data Hyrum S. Anderson and David G. Long Brigham Young

Long, David G.

386

Transoceanic infragravity waves impacting Antarctic ice shelves Peter D. Bromirski,1  

E-Print Network (OSTI)

that IG- wave forcing may produce ice-shelf fractures that enable abrupt disintegration of ice shelvesTransoceanic infragravity waves impacting Antarctic ice shelves Peter D. Bromirski,1 Olga V-forced shoreward propagating swell. Seismic observations on the Ross Ice Shelf show that free IG waves generated

Boyce, C. Kevin

387

Development, sensitivity analysis, and uncertainty quantification of high-fidelity arctic sea ice models.  

SciTech Connect

Arctic sea ice is an important component of the global climate system and due to feedback effects the Arctic ice cover is changing rapidly. Predictive mathematical models are of paramount importance for accurate estimates of the future ice trajectory. However, the sea ice components of Global Climate Models (GCMs) vary significantly in their prediction of the future state of Arctic sea ice and have generally underestimated the rate of decline in minimum sea ice extent seen over the past thirty years. One of the contributing factors to this variability is the sensitivity of the sea ice to model physical parameters. A new sea ice model that has the potential to improve sea ice predictions incorporates an anisotropic elastic-decohesive rheology and dynamics solved using the material-point method (MPM), which combines Lagrangian particles for advection with a background grid for gradient computations. We evaluate the variability of the Los Alamos National Laboratory CICE code and the MPM sea ice code for a single year simulation of the Arctic basin using consistent ocean and atmospheric forcing. Sensitivities of ice volume, ice area, ice extent, root mean square (RMS) ice speed, central Arctic ice thickness, and central Arctic ice speed with respect to ten different dynamic and thermodynamic parameters are evaluated both individually and in combination using the Design Analysis Kit for Optimization and Terascale Applications (DAKOTA). We find similar responses for the two codes and some interesting seasonal variability in the strength of the parameters on the solution.

Peterson, Kara J.; Bochev, Pavel Blagoveston; Paskaleva, Biliana S.

2010-09-01T23:59:59.000Z

388

Development of the Great Lakes Ice-circulation Model (GLIM): Application to Lake Erie in 20032004  

E-Print Network (OSTI)

due to strong cooling and wind mixing. Prediction of the lake's ice extent (i.e., ice coverDevelopment of the Great Lakes Ice-circulation Model (GLIM): Application to Lake Erie in 2003: Received 4 May 2009 Accepted 30 November 2009 Communicated by Dr. Ram Yerubandi Index words: Coupled Ice

389

Arctic sea ice declined rapidly to unprec-edented low extents in the summer of 2007,  

E-Print Network (OSTI)

cooling, ice extent remains far below normal. Understanding Sea Ice Loss Key factors behind this recordArctic sea ice declined rapidly to unprec- edented low extents in the summer of 2007, raising concern that the Arctic may be on the verge of a fundamental transition toward a seasonal ice cover

Clements, Craig

390

Seasonal variation of upwelling in the Alaskan Beaufort Sea: Impact of sea ice cover  

E-Print Network (OSTI)

that lateral ocean heat flux from the shelf to the basin melts a substantial amount of ice in the marginal iceSeasonal variation of upwelling in the Alaskan Beaufort Sea: Impact of sea ice cover Lena M to characterize differences in upwelling near the shelf break in the Alaskan Beaufort Sea due to varying sea ice

Pickart, Robert S.

391

ARKTOS: An Intelligent System for SAR Sea Ice Image Classification Leen-Kiat Soh1  

E-Print Network (OSTI)

in meteorology and in global climate studies. For example, the thickness of sea ice influences the heat fluxARKTOS: An Intelligent System for SAR Sea Ice Image Classification Leen-Kiat Soh1 , Costas sea ice image analysis named ARKTOS (Advanced Reasoning using Knowledge for Typing Of Sea ice). ARKTOS

Kansas, University of

392

Seasonal variation of upwelling in the Alaskan Beaufort Sea: Impact of sea ice cover  

E-Print Network (OSTI)

ocean heat flux42 from the shelf to the basin melts a substantial amount of ice in the marginal ice Seasonal variation of upwelling in the Alaskan Beaufort Sea: Impact of sea ice cover Lena M the shelfbreak in the Alaskan Beaufort Sea due to3 varying sea-ice conditions. The record is divided into three

Pickart, Robert S.

393

Modeling Coulombic failure of sea ice with leads Alexander V. Wilchinsky1  

E-Print Network (OSTI)

Modeling Coulombic failure of sea ice with leads Alexander V. Wilchinsky1 and Daniel L. Feltham1 ice failure under lowconfinement compression is modeled with a linear Coulombic criterion that can of anisotropy we consider a simplified anisotropic sea ice model where the sea ice thickness depends

Feltham, Daniel

394

Testing a Coupled Ice-Mixed-Layer Model Under Subarctic Conditions  

Science Journals Connector (OSTI)

A one-dimensional oceanic mixed-layer model has been coupled with a thermodynamic sea ice model in order to study the seasonal cycle of ice-ocean interaction in the subarctic ocean. The ice thickness is assumed constant and only variations of ice ...

Marie-Nolle Houssais

1988-02-01T23:59:59.000Z

395

The role of sea ice in the temperature-precipitation feedback of glacial cycles  

E-Print Network (OSTI)

precipitation over the ice sheets. The insulating effect of the sea ice on the hydrological cycle is foundThe role of sea ice in the temperature-precipitation feedback of glacial cycles Hezi Gildor · Yosef climate history can shed some light. Sea ice is a key player in the climate system and in the hydrological

Tziperman, Eli

396

The role of sea ice in the temperature-precipitation feedback of glacial cycles  

E-Print Network (OSTI)

to an increase in snow precipitation over the ice sheets. The insulating effect of the sea iceThe role of sea ice in the temperature-precipitation feedback of glacial cycles Hezi Gildor · Yosef unsatisfactory, yet upon which past climate history can shed some light. Sea ice is a key player in the climate

Tziperman, Eli

397

10.1098/rsta.2003.1244 Sea-ice switches and abrupt climate change  

E-Print Network (OSTI)

of sea-ice cover|through its strong cooling ice{albedo feedback, its insulating e®ect on local10.1098/rsta.2003.1244 Sea-ice switches and abrupt climate change By Hezi Gildor1 a n d Eli propose that past abrupt climate changes were probably a result of rapid and extensive variations in sea-ice

Tziperman, Eli

398

NAO influence on net sea ice production and exchanges in the Arctic region  

E-Print Network (OSTI)

insulation during the ice formation process. The North Atlantic Oscillation (NAO) related atmosphericNAO influence on net sea ice production and exchanges in the Arctic region Aixue Hu, Claes Rooth and Rainer Bleck February 18, 2003 Abstract The variability of the net sea ice production and the sea ice

Hu, Aixue

399

NAO influence on net sea ice production and exchanges in the Arctic region  

E-Print Network (OSTI)

suppresses the development of thermal insulation during the ice formation process. The North AtlanticNAO influence on net sea ice production and exchanges in the Arctic region Aixue Hu National Center of the net sea ice production and the sea ice exchanges between the Arctic and its adjacent seas are studied

Hu, Aixue

400

Ice-shelf collapse from subsurface warming as a trigger for Heinrich events  

E-Print Network (OSTI)

in Antarctica, the resulting ice-shelf loss and attendant HSIS acceleration would produce a Heinrich eventIce-shelf collapse from subsurface warming as a trigger for Heinrich events Shaun A. Marcotta,1-discharge events from the Hudson Strait Ice Stream (HSIS) of the Laurentide Ice Sheet, referred to as Heinrich

Schmittner, Andreas

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Sediment Melt-Migration Dynamics in Perennial Antarctic Lake Ice Steven M. Jepsen*  

E-Print Network (OSTI)

melting through laboratory ice at 22 uC in simulated summer conditions, with warmer ice producing faster boundaries was pronounced in laboratory ice warmer than 21 uC. This mechanism produced a flux of 0.1 g m22 hrSediment Melt-Migration Dynamics in Perennial Antarctic Lake Ice Steven M. Jepsen* Edward E. Adams

Priscu, John C.

402

FESD Proposal, Type I VOICE: Volcano, Ocean, Ice, and Carbon Experiments  

E-Print Network (OSTI)

in continental ice volume and sea level produce changes in pressure and stress within the crust and mantleFESD Proposal, Type I VOICE: Volcano, Ocean, Ice, and Carbon Experiments Project Manager: Charles during Pleistocene ice ages. We posit that changes in sea level and ice volume drive changes in volcanism

Huybers, Peter

403

Seasonal predictions of ice extent in the Arctic Ocean R. W. Lindsay,1  

E-Print Network (OSTI)

Service and the U. S. National Ice Center) produces summer outlooks of ice conditions for specific regionsSeasonal predictions of ice extent in the Arctic Ocean R. W. Lindsay,1 J. Zhang,1 A. J. Schweiger,1 29 February 2008. [1] How well can the extent of arctic sea ice be predicted for lead periods of up

Zhang, Jinlun

404

Modeled methanesulfonic acid (MSA) deposition in Antarctica and its relationship to sea ice  

E-Print Network (OSTI)

been investigated with the goal of producing a proxy for sea ice cover in past climates [SaigneModeled methanesulfonic acid (MSA) deposition in Antarctica and its relationship to sea ice P. J] Methanesulfonic acid (MSA) has previously been measured in ice cores in Antarctica as a proxy for sea ice extent

Holmes, Christopher D.

405

Experimental Validation of a Computational Fluid Dynamics Model for IAQ applications in Ice Rink Arenas  

E-Print Network (OSTI)

1 Experimental Validation of a Computational Fluid Dynamics Model for IAQ applications in Ice Rink, USA, Fax: 617-432-4122, Abstract Many ice rink arenas have ice resurfacing equipment that uses fossil temperature distributions in ice rinks. The numerical results agree reasonably with the corresponding

Chen, Qingyan "Yan"

406

Gas ageice age differences and the chronology of the Vostok ice core, M. L. Bender,1  

E-Print Network (OSTI)

Gas age­ice age differences and the chronology of the Vostok ice core, 0­100 ka M. L. Bender,1 G. [1] Gas is trapped in polar ice at depths of $50­120 m and is therefore significantly younger than cores (Vostok, Dome Fuji, and Dome C). We recorrelate the gas records of Vostok and Greenland Ice Sheet

Chappellaz, Jérôme

407

Application of FLake for the prediction of ice thickness for inland waters in the Netherlands  

E-Print Network (OSTI)

Application of FLake for the prediction of ice thickness for inland waters in the Netherlands Cisco in the Netherlands. In cold spells numerous ditches, canals and lakes get frozen and many people go out for ice in the Netherlands. in ice thickness predictions. KNMI issues ice thickness predictions, based on a model of De Bruin

Stoffelen, Ad

408

FNS Presentation - Hydrogen Station & Hydrogen ICE Vehicles Operation  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Station & Hydrogen ICE Hydrogen Station & Hydrogen ICE Vehicle Operations Federal Network for Sustainability Idaho Falls, Idaho - July 2006 Jim Francfort INL/CON-06-11569 Presentation Outline * Background & Goal * Arizona Public Service (APS) Alternative Fuel (Hydrogen) Pilot Plant - design & operations * Fuel Dispensing * Hydrogen & HCNG Internal Combustion Engine (ICE) Vehicle Testing Activities * Briefly, other AVTA Activities * WWW Information 2 AVTA Background & Goal * Advanced Vehicle Testing Activity (AVTA) is part of the U.S. Department of Energy's (DOE) FreedomCAR and Vehicle Technologies Program * These activities are conducted by the Idaho National Laboratory (INL) & the AVTA testing partner Electric Transportation Applications (ETA) * AVTA Goal - Provide benchmark data for technology

409

Minimalist Model of Ice Microphysics in Mixed-phase Stratiform Clouds  

SciTech Connect

The question of whether persistent ice crystal precipitation from super cooled layer clouds can be explained by time-dependent, stochastic ice nucleation is explored using an approximate, analytical model, and a large-eddy simulation (LES) cloud model. The updraft velocity in the cloud defines an accumulation zone, where small ice particles cannot fall out until they are large enough, which will increase the residence time of ice particles in the cloud. Ice particles reach a quasi-steady state between growth by vapor deposition and fall speed at cloud base. The analytical model predicts that ice water content (wi) has a 2.5 power law relationship with ice number concentration ni. wi and ni from a LES cloud model with stochastic ice nucleation also confirm the 2.5 power law relationship. The prefactor of the power law is proportional to the ice nucleation rate, and therefore provides a quantitative link to observations of ice microphysical properties.

Yang, F.; Ovchinnikov, Mikhail; Shaw, Raymond A.

2013-07-28T23:59:59.000Z

410

Ice Concentration Retrieval in Stratiform Mixed-phase Clouds Using Cloud Radar Reflectivity Measurements and 1D Ice Growth Model Simulations  

SciTech Connect

Measurement of ice number concentration in clouds is important but still challenging. Stratiform mixed-phase clouds (SMCs) provide a simple scenario for retrieving ice number concentration from remote sensing measurements. The simple ice generation and growth pattern in SMCs offers opportunities to use cloud radar reflectivity (Ze) measurements and other cloud properties to infer ice number concentration quantitatively. To understand the strong temperature dependency of ice habit and growth rate quantitatively, we develop a 1-D ice growth model to calculate the ice diffusional growth along its falling trajectory in SMCs. The radar reflectivity and fall velocity profiles of ice crystals calculated from the 1-D ice growth model are evaluated with the Atmospheric Radiation Measurements (ARM) Climate Research Facility (ACRF) ground-based high vertical resolution radar measurements. Combining Ze measurements and 1-D ice growth model simulations, we develop a method to retrieve the ice number concentrations in SMCs at given cloud top temperature (CTT) and liquid water path (LWP). The retrieved ice concentrations in SMCs are evaluated with in situ measurements and with a three-dimensional cloud-resolving model simulation with a bin microphysical scheme. These comparisons show that the retrieved ice number concentrations are within an uncertainty of a factor of 2, statistically.

Zhang, Damao; Wang, Zhien; Heymsfield, Andrew J.; Fan, Jiwen; Luo, Tao

2014-10-01T23:59:59.000Z

411

Micro-Spectroscopic Imaging and Characterization of Individually Identified Ice Nucleating Particles from a Case Field Study  

SciTech Connect

The effect of anthropogenic and biogenic organic particles on atmospheric glaciation processes is poorly understood. We use an optical microscopy (OM) setup to identify the location of ice nuclei (IN) active in immersion freezing and deposition ice nucleation for temperatures of 200-273 K within a large population of particles sampled from an ambient environment. Applying multi-modal micro-spectroscopy methods we characterize the physicochemical properties of individual IN in particle populations collected in central California. Chemical composition and mixing state analysis of particle populations are performed to identify characteristic particle-type classes. All particle-types contained organic material. Particles in these samples take up water at subsaturated conditions, induce immersion freezing at subsaturated and saturated conditions above 226 K, and act as deposition IN below 226 K. The identified IN belong to the most common particle-type classes observed in the field samples: organic coated sea salt, Na-rich, and secondary and refractory carbonaceous particles. Based on these observations, we suggest that the IN are not always particles with unique chemical composition and exceptional ice nucleation propensity; rather, they are common particles in the ambient particle population. Thus, particle composition and morphology alone are insufficient to assess their potential to act as IN. The results suggest that particle-type abundance is also a crucial factor in determining the ice nucleation efficiency of specific IN types. These findings emphasize that ubiquitous organic particles can induce ice nucleation under atmospherically relevant conditions and that they may play an important role in atmospheric glaciation processes.

Knopf, Daniel A.; Alpert, Peter A.; Wang, Bingbing; O'Brien, Rachel E.; Kelly, Stephen T.; Laskin, Alexander; Gilles, Mary K.; Moffet, Ryan C.

2014-09-03T23:59:59.000Z

412

Several caves in high elevated alpine regions host massive ice fillings and underground glaciers. The age of the ice may exceed several hundred or thousand years and the ice bodies possibly have recorded paleoclimatic information. Despite  

E-Print Network (OSTI)

of the NCA within the Eastern Alps of Europe. Yellow dots indicate locations of known ice caves, yellow stars information. The project AUSTRO*ICE*CAVES*2100 aims at investigating the extent with results from steam-drilling which did not reach the bottom of the ice, but got stuck in deep layers. Most

Brückl, Ewald

413

A New and Simple Approach to Determine the Abundance of Hydrogen Molecules on Interstellar Ice Mantles  

E-Print Network (OSTI)

Water is usually the main component of ice mantles, which cover the cores of dust grains in cold portions of dense interstellar clouds. When molecular hydrogen is adsorbed onto an icy mantle through physisorption, a common assumption in gas-grain rate equation models is to use an adsorption energy for molecular hydrogen on a pure water substrate. However, at high density and low temperature, when H2 is efficiently adsorbed onto the mantle, its surface abundance can be strongly overestimated if this assumption is still used. Unfortunately, the more detailed microscopic Monte Carlo treatment cannot be used to study the abundance of H2 in ice mantles if a full gas-grain network is utilized. We present a numerical method adapted for rate-equation models that takes into account the possibility that an H2 molecule can, while diffusing on the surface, find itself bound to another hydrogen molecule, with a far weaker bond than the H2-water bond, which can lead to more efficient desorption. We label the ensuing desorp...

Hincelin, Ugo; Herbst, Eric

2014-01-01T23:59:59.000Z

414

Searching for Cosmic Accelerators via IceCube  

NLE Websites -- All DOE Office Websites (Extended Search)

Searching for Cosmic Searching for Cosmic Accelerators via IceCube Searching for Cosmic Accelerators via IceCube Berkeley Lab Researchers Part of an International Hunt November 21, 2013 Lynn Yarris, lcyarris@lbl.gov, 510.486.5375 Bert.jpg This event display shows "Bert," one of two neutrino events discovered at IceCube whose energies exceeded one petaelectronvolt (PeV). The colors show when the light arrived, with reds being the earliest, succeeded by yellows, greens and blues. The size of the circle indicates the number of photons observed. (Courtesy of IceCube Lab) In our universe there are particle accelerators 40 million times more powerful than the Large Hadron Collider (LHC) at CERN. Scientists don't know what these cosmic accelerators are or where they are located, but new

415

Progress on a TWP-ICE Monsoon Case Study  

NLE Websites -- All DOE Office Websites (Extended Search)

25-mb 25-mb large-scale forcing 10-mb large-scale forcing Tracers Future work Progress on a TWP-ICE Monsoon Case Study Ann Fridlind and Andrew Ackerman * NASA GISS thanks to Jon Petch * ECMWF Shaocheng Xie * LLNL TWP-ICE and ACTIVE Science Teams DOE ARM Program and Data Archive NASA Radiation Sciences Program NASA Advanced Supercomputing Division 18th Annual ARM Science Team Meeting 10 March 2008 Outline Introduction 25-mb large-scale forcing 10-mb large-scale forcing Tracers Future work 1 Introduction TWP-ICE monsoon period GISS set-up 2 25-mb large-scale forcing Initial results Comparison with ECMWF forcing style Tropopause moisture analysis 3 10-mb large-scale forcing Tropopause moisture analysis Final results 4 Tracers Measurements Model results 5 Future work Outline Introduction 25-mb large-scale forcing 10-mb large-scale forcing Tracers Future work TWP-ICE monsoon

416

A design protocol for tailoring ice-templated scaffold structure  

Science Journals Connector (OSTI)

...fact that this relationship is based on fundamental principles of ice templating should...freezing protocol. The robust, and fundamental, link between time at equilibrium and...crystal growth and nucleation. In Handbook of industrial crystallization (ed...

2014-01-01T23:59:59.000Z

417

Hail ice impact on composite structures at glancing angles  

E-Print Network (OSTI)

ice impacts on woven carbon/epoxy composite panels. Composites: Part A 34 (2003), pp. 25 - 41. Jones, R. , Paul,of Impact Damage in Composites: Some Problems and Answers.

Funai, Sho

2012-01-01T23:59:59.000Z

418

ARM - Lesson Plans: When Floating Ice Melts in the Sea  

NLE Websites -- All DOE Office Websites (Extended Search)

Questions Does the water overflow when ice melts? Do you think that melting icebergs will make the sea level rise? Do you have any reason to support your answer in question (2)...

419

Rapid Collapse of Northern Larsen Ice Shelf, Antarctica  

Science Journals Connector (OSTI)

...result of perturbed mass balance. (Auth.) Antarctic...shelves Larsen ice shelf mass balance Quaternary remote sensing...Development, domestic wastewater treatment is estimated to cover...Worldwide Desalt-ing Plants Inventory (International...

Helmut Rott; Pedro Skvarca; Thomas Nagler

1996-02-09T23:59:59.000Z

420

Rapid Cooling Using Ice Slurries for Industrial and Medical Applicatio...  

NLE Websites -- All DOE Office Websites (Extended Search)

to replace chilled-water cooling systems in building complexes. Because of the high energy content of ice slurry, its cooling capacity is many times greater than that of...

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

A phase-space model for Pleistocene ice volume  

E-Print Network (OSTI)

We present a phase-space model that simulates Pleistocene ice volume changes based on Earth's orbital parameters. Terminations in the model are triggered by a combination of ice volume and orbital forcing and agree well with age estimates for Late Pleistocene terminations. The average phase at which model terminations begin is approximately 90 +/- 90 degrees before the maxima in all three orbital cycles. The large variability in phase is likely caused by interactions between the three cycles and ice volume. Unlike previous ice volume models, this model produces an orbitally driven increase in 100-kyr power during the mid-Pleistocene transition without any change in model parameters. This supports the hypothesis that Pleistocene variations in the 100-kyr power of glacial cycles could be caused, at least in part, by changes in Earth's orbital parameters, such as amplitude modulation of the 100-kyr eccentricity cycle, rather than changes within the climate system.

Imbrie, John Z; Lisiecki, Lorraine E

2011-01-01T23:59:59.000Z

422

Ice Concentration Retrieval in Stratiform Mixed-Phase Clouds Using Cloud Radar Reflectivity Measurements and 1D Ice Growth Model Simulations  

Science Journals Connector (OSTI)

Measurements of ice number concentration in clouds are important but still pose problems. The pattern of ice development in stratiform mixed-phase clouds (SMCs) offers an opportunity to use cloud radar reflectivity (Ze) measurements and other ...

Damao Zhang; Zhien Wang; Andrew Heymsfield; Jiwen Fan; Tao Luo

2014-10-01T23:59:59.000Z

423

Ice cores drilled from lake and ocean floors, continents, and ice sheets provide geoscientists with the most extensive and accurate picture of the earth!s  

E-Print Network (OSTI)

zer Ice cores drilled from lake and ocean floors, continents, and ice sheets provide geoscientists produces 30 GB of raw imagery. With the ability to display core sections in high resolution, Corelyzer

Johnson, Andrew

424

Rigid pile response to ice plate and current loads  

E-Print Network (OSTI)

, sea ice scouring, earthquake analysis, and geotechnical considerations in Arctic designs. Arctic offshore engineering research suddenly incr eased during the mid-seventies when the oil industry began exploration for oil in the Beaufort Sea..., sea ice scouring, earthquake analysis, and geotechnical considerations in Arctic designs. Arctic offshore engineering research suddenly incr eased during the mid-seventies when the oil industry began exploration for oil in the Beaufort Sea...

Nolte, John George

2012-06-07T23:59:59.000Z

425

Drop Impact and Rebound Dynamics on an Inclined Superhydrophobic Surface  

Science Journals Connector (OSTI)

The ability of the superhydrophobic surface in promoting drop rebound has significant applications in areas such as anti-icing and fouling on aircraft, power lines, and wind turbines and has prompted researchers to create an array of synthetic superhydrophobic surfaces using fabrication methods such as surface etching techniques (plasma, laser, chemical), lithography (photolithography, electron beam, X-ray), electrochemical deposition processes, spray casting, as well as electrospinning techniques. ... For example, ice accretion on a wind turbine blade as well as on an aircraft wing typically involves impact and freezing of supercooled liquid droplets on those surfaces at subzero environmental temperatures. ... By varying laser fluence, micro-texture morphol. of the wafers could be reproduced and well controlled. ...

Yong Han Yeong; James Burton; Eric Loth; Ilker S. Bayer

2014-09-12T23:59:59.000Z

426

OPTICAL CONSTANTS OF NH{sub 3} AND NH{sub 3}:N{sub 2} AMORPHOUS ICES IN THE NEAR-INFRARED AND MID-INFRARED REGIONS  

SciTech Connect

Ammonia ice has been detected on different astrophysical media ranging from interstellar medium (ISM) particles to the surface of various icy bodies of our solar system, where nitrogen is also present. We have carried out a detailed study of amorphous NH{sub 3} ice and NH{sub 3}:N{sub 2} ice mixtures, based on infrared (IR) spectra in the mid-IR (MIR) and near-IR (NIR) regions, supported by theoretical quantum chemical calculations. Spectra of varying ice thicknesses were obtained and optical constants were calculated for amorphous NH{sub 3} at 15 K and 30 K and for a NH{sub 3}:N{sub 2} mixture at 15 K over a 500-7000 cm{sup 1} spectral range. These spectra have improved accuracy over previous data, where available. Moreover, we also obtained absolute values for the band strengths of the more prominent IR features in both spectral regions. Our results indicate that the estimated NH{sub 3} concentration in ISM ices should be scaled upward by ?30%.

Zanchet, Alexandre; Rodrguez-Lazcano, Yamilet; Glvez, scar; Herrero, Vctor J.; Escribano, Rafael; Mat, Beln, E-mail: belen.mate@csic.es [Instituto de Estructura de la Materia, IEM-CSIC, Serrano 123, E-28006 Madrid (Spain)

2013-11-01T23:59:59.000Z

427

Variations in the age of Arctic sea-ice and summer sea-ice extent Ignatius G. Rigor1,2  

E-Print Network (OSTI)

. On time scales of days to weeks, wind stresses from storms produce ridges of sea-ice and areas of openVariations in the age of Arctic sea-ice and summer sea-ice extent Ignatius G. Rigor1,2 and John M] Three of the past six summers have exhibited record low sea-ice extent on the Arctic Ocean. These minima

Rigor, Ignatius G.

428

Late pleistocene ice age scenarios based on observational evidence  

SciTech Connect

Ice age scenarios for the last glacial interglacial cycle, based on observations of Boyle and Keigwin concerning the North Atlantic thermohaline circulation and of Barnola et al. concerning atmospheric CO[sub 2] variations derived from the Vostok ice cores, are herein analyzed. Northern Hemisphere continental ice sheets are simulated with an energy balance model (EBM) that is asynchronously coupled to vertically integrated ice sheets models based on the Glen flow law. The EBM includes both a realistic land-sea distribution and temperature-albedo feedback and is driven with orbital variations of effective solar insolation. With the addition of atmospheric CO[sub 2] and ocean heat flux variations, but not in their absence, a complete collapse is obtained for the Eurasian ice sheet but not for the North American ice sheet. We therefore suggest that further feedback mechanisms, perhaps involving more accurate modeling of the dynamics of the mostly marine-based Laurentide complex appears necessary to explain termination I. 96 refs., 12 figs., 2 tabs.

DeBlonde, G. (Canada Center for Remote Sensing, Ottawa, Ontario (Canada)); Peltier, W.R. (Univ. of Toronto, Ontario (Canada))

1993-04-01T23:59:59.000Z

429

Be dating of the Narsarsuaq moraine in southernmost Greenland: evidence for a late-Holocene ice advance exceeding the Little Ice Age  

E-Print Network (OSTI)

in southern Greenland. Southern Greenland warming at w1.5 ka was also concurrent with the end of the Roman Greenland. Other southernmost Greenland ice-margin records do not preclude a pre-LIA ice-margin maximum a late-Holocene pre-LIA maximum was a local phe- nomenon or a regional southern Greenland ice maximum

430

Classical trajectory simulations of photodissociation of methyl bromide at surfaces  

E-Print Network (OSTI)

as the P -phase of solid CH&Br to simulate dissociation from high coverages of the adsorbate where CH&Br ice is formed. The intermolecular interaction between the gas and surface atoms included long-range dispersion forces and short-range repulsive forces... ~ Cia coefficients for the interaction of CH&Br with LiF. 28 II. Structure and energetics parameters of CH&Br adsorbed on rough surfaces. . . . . . . . . . . . . . . . . . . . . . . . . . " " 31 III. Buckingham potential parameters for CHsBr. . . 42...

Watson, Joseph Marion

2012-06-07T23:59:59.000Z

431

ICES Science and Advice Yvonne Walther  

E-Print Network (OSTI)

Assessment of Baltic Cod FMSY= Fishing Mortality at Maximum Sustainable yield FMGT=Fishing mortality of available information than to emphasize areas of uncertainty Despite the scientific facade, EAM is foremost

Limburg, Karin E.

432

Assessing Phosphorous Loss to Protect Surface Water  

E-Print Network (OSTI)

Phosphorus LossStory by Raul L. Garcia The Texas State Soil and Water ConservationBoard (TSSWCB) in collaboration with the Department of Soil and Crop Sciences at Texas A&M University, Texas Cooperative Extension (TCE), Texas Water Resources... Institute (TWRI), and the U.S. Department of Agriculture's Natural Resource Conservation Service (NRCS), have developed a field validation of the Texas Phosphorus Index. This project, located near Bosque and Leon Rivers, began June 1, 2002, and ended...

Garcia, Raul

2005-01-01T23:59:59.000Z

433

Environmental Assessment of Facility  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

0 0 0 DOEEA-0930 Environmental Assessment of Facility Operations at the US. Department of Energy Grand Junction Projects Off ice, Grand Junction, Colorado June 1996 U S . Deparfment of Energy Grand Junction Projects Office Approved for public release; distribution is unlimited. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 I U.S. DEPARTMENT OF ENERGY Finding of No Significant Impact, Facility Operations at the U . S . Department of Energy Grand Junction Projects Office, Grand Junction, Colorado AGENCY: U.S. Department of Energy ACTION Finding of No Sigdkant Impact SUMMARY: The U.S. Department of Energy (DOE) has prepared a sitewide o S T ~ environmental assessment (EA) @OE/EA-0930) of the proposed action to continue and expand present-day activities on the DOE Grand Junction Projects office (GJPO) facility

434

Chlorophyll a biomass and growth of sea-ice microalgae along a salinity gradient (southeastern Hudson Bay, Canadian Arctic)  

Science Journals Connector (OSTI)

The biomass of microalgae at the bottom of first-year sea ice, in southeastern Hudson Bay (Canadian Arctic), parallels an inshore-offshore salinity gradient caused by the under-ice plume of ... ice-algal biomass ...

Louis Legendre; Marie-Jose Martineau; Jean-Claude Therriault

1992-09-01T23:59:59.000Z

435

The IceCube Collaboration:contributions to the 30 th International Cosmic Ray Conference (ICRC 2007),  

E-Print Network (OSTI)

X. Bai (for the IceCube Collaboration, J. Phys. : Conf. Ser.Gaisser for the IceCube Collaboration, these proceedings. [Achterberg et al. (IceCube Collaboration) Astropart. Phys.

Ackermann, M.; IceCube Collaboration

2008-01-01T23:59:59.000Z

436

Long?term variations of ice breaking noise in Antarctica  

Science Journals Connector (OSTI)

Numerous low frequency transient signals arriving from Antarctica have been detected in five?year sea noise recordings in 2002?2006 at the hydroacoustic listening station deployed off Cape Leeuwin in Western Australia as part of the International Monitoring System of the Comprehensive Nuclear?Test?Ban Treaty. The majority of these signals consist of a single arrival of mode 1 which dominates the higher modes and undergoes strong frequency dispersion due to long?range propagation in the polar ocean environment. These signals are believed to be emitted primarily by ice rifting and breaking events on the Antarctic shelf. Several regions along the Antarctic coast associated with certain glaciers and ice tongues were found to persistently be much more active in generatingicenoise than other parts of the Antarctic shelf. An analysis of long?term changes in the frequency of occurrence of ice events showed noticeable seasonal cycles but did not reveal any significant interannual variations against the background of short?term fluctuations. Some of the ice events detected at the Cape Leeuwin station were also identified in sea noise recordings made on autonomous acoustic loggers deployed on the Antarctic shelf which allowed us to investigate characteristics of the acoustic signals from ice events near their origins.

Alexander Gavrilov; Binghui Li

2008-01-01T23:59:59.000Z

437

Study of High pT Muons in IceCube  

SciTech Connect

Muons with a high transverse momentum (p{sub T}) are produced in cosmic ray air showers via semileptonic decay of heavy quarks and the decay of high p{sub T} kaons and pions. These high p{sub T} muons have a large lateral separation from the shower core muon bundle. IceCube is well suited for the detection of high p{sub T} muons. The surface shower array can determine the energy, core location and direction of the cosmic ray air shower while the in-ice array can reconstruct the energy and direction of the high p{sub T} muon. This makes it possible to measure the decoherence function (lateral separation spectrum) at distances greater than 150 meters. The muon p{sub T} can be determined from the muon energy (measured by dE/dx) and the lateral separation. The high p{sub T} muon spectrum may also be calculated in a perturbative QCD framework; this spectrum is sensitive to the cosmic-ray composition.

IceCube Collaboration; Gerhardt, Lisa; Klein, Spencer

2009-06-01T23:59:59.000Z

438

A study of carbon-14 of paleoatmospheric methane for the last glacial termination from ancient glacial ice  

E-Print Network (OSTI)

produce the folding and cross-cutting features in Pakitsoq ice,ice were subjected to intensive irradiation by protons to produce

Petrenko, Vasilii Victorovich

2008-01-01T23:59:59.000Z

439

Title: Radar-observed convective characteristics during TWP-ICE  

NLE Websites -- All DOE Office Websites (Extended Search)

Title: Radar-observed convective characteristics during TWP-ICE Title: Radar-observed convective characteristics during TWP-ICE Schumacher, Courtney Texas A&M University Houze, Robert University of Washington May, Peter Bureau or Meteorology Research Centre Frederick, Kaycee Cetrone, Jasmine Vallgren, Andreas Category: Field Campaigns This poster will describe the radar dataset obtained in the Tropical Warm Pool International Cloud Experiment (TWP-ICE), which is to take place 20 January - 14 February 2006 in the vicinity of Darwin, Australia. We will describe the convective systems observed during the project by two scanning C-band Doppler radars, one of which will provide dual-polarization measurements, and ARM's vertically pointing cloud radar and lidar installations. In addition, we will discuss the potential for combining

440

Ice slurry technology can save heart attack victims, surgery patients  

NLE Websites -- All DOE Office Websites (Extended Search)

Ice Ice slurry technology can save heart attack victims, surgery patients Director's Welcome Organization Achievements Highlights Fact Sheets, Brochures & Other Documents Multimedia Library About Nuclear Energy Nuclear Reactors Designed by Argonne Argonne's Nuclear Science and Technology Legacy Opportunities within NE Division Visit Argonne Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Celebrating the 70th Anniversary of Chicago Pile 1 (CP-1) Argonne OutLoud on Nuclear Energy Argonne Energy Showcase 2012 Highlights Bookmark and Share Ice slurry technology can save heart attack victims, surgery patients Doctors use an endoscope to see the application of the slurry during a laparoscopic kidney surgery on a pig

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Search for relativistic magnetic monopoles with IceCube  

Science Journals Connector (OSTI)

We present the first results in the search for relativistic magnetic monopoles with the IceCube detector, a subsurface neutrino telescope located in the South Polar ice cap containing a volume of 1??km3. This analysis searches data taken on the partially completed detector during 2007 when roughly 0.2??km3 of ice was instrumented. The lack of candidate events leads to an upper limit on the flux of relativistic magnetic monopoles of ?90%C.L.?310-18??cm-2?sr-1?s-1 for ??0.8. This is a factor of 4 improvement over the previous best experimental flux limits up to a Lorentz boost ? below 107. This result is then interpreted for a wide range of mass and kinetic energy values.

R. Abbasi et al. (IceCube Collaboration)

2013-01-18T23:59:59.000Z

442

Federal Energy Management Program: Covered Product Category: Air-Cooled Ice  

NLE Websites -- All DOE Office Websites (Extended Search)

Air-Cooled Ice Makers to someone by E-mail Air-Cooled Ice Makers to someone by E-mail Share Federal Energy Management Program: Covered Product Category: Air-Cooled Ice Makers on Facebook Tweet about Federal Energy Management Program: Covered Product Category: Air-Cooled Ice Makers on Twitter Bookmark Federal Energy Management Program: Covered Product Category: Air-Cooled Ice Makers on Google Bookmark Federal Energy Management Program: Covered Product Category: Air-Cooled Ice Makers on Delicious Rank Federal Energy Management Program: Covered Product Category: Air-Cooled Ice Makers on Digg Find More places to share Federal Energy Management Program: Covered Product Category: Air-Cooled Ice Makers on AddThis.com... Energy-Efficient Products Federal Requirements Covered Product Categories Product Designation Process

443

The Role of Oceans and Sea Ice in Abrupt Transitions between Multiple Climate States  

E-Print Network (OSTI)

The coupled climate dynamics underlying large, rapid, and potentially irreversible changes in ice cover are studied. A global atmosphereoceansea ice general circulation model with idealized aquaplanet geometry is forced ...

Rose, Brian E. J.

444

Introduction On the basis of width and outflow, Institute Ice Stream (IIS)  

E-Print Network (OSTI)

was initially held secret, the ice stream was not identified until airborne radar mapping in the late 1970s characteristics of Institute Ice Stream using remote sensing TED SCAMBOS*, JENNIFER BOHLANDER, BRUCE RAUP

Raup, Bruce H.

445

One Thousand Centuries of Climatic Record from Camp Century on the Greenland Ice Sheet  

Science Journals Connector (OSTI)

...Centuries of Climatic Record from Camp Century on the Greenland Ice Sheet 10...depth has been evaluated for the Camp Century, Greenland, 1390 meter deep ice...THEORETICAL TEMPERATURE PROFILES OF CAMP CENTURY GREENLAND BOREHOLE, JOURNAL OF...

W. Dansgaard; S. J. Johnsen; J. Mller; C. C. Langway Jr.

1969-10-17T23:59:59.000Z

446

Interannual Atmospheric Variability Affects Continental Ice Sheet Simulations on Millennial Time Scales  

E-Print Network (OSTI)

well as cooling at the southeast margin of the ice sheet. Fdue to cooling over the North Ameri- can and Eurasian icetide ice sheet margin resulting in a 1C cooling over the

Pritchard, Michael S; Bush, Andrew B. G; Marshall, Shawn J

2008-01-01T23:59:59.000Z

447

The spreading of a buoyant plume beneath a landfast ice cover  

Science Journals Connector (OSTI)

Idealized numerical simulations using the Regional Ocean Modeling System demonstrate the effects of an immobile landfast ice cover that is frictionally coupled to an under-ice buoyant plume established by river discharge. The discharge rapidly ...

Jeremy L. Kasper; Thomas J. Weingartner

448

On the Microphysical Properties of Ice Clouds as Inferred from the Polarization of Electromagnetic Waves  

E-Print Network (OSTI)

campaigns ranging in effective diameter from 10 micrometers to 90 micrometers. Bulk scattering properties for the MODIS Collection 5 ice cloud product are used in this study, along with properties for two mid-latitude ice cloud models, a polar...

Cole, Benjamin

2012-10-19T23:59:59.000Z

449

Mathematical Modelling and Numerical Simulation of Marine Ecosystems With Applications to Ice Algae.  

E-Print Network (OSTI)

??Sea-ice ecosystem modelling is a novel field of research. In this thesis, the main organism studied is sea-ice algae. A basic introduction to algae and (more)

Wickramage, Shyamila Iroshi Perera

2013-01-01T23:59:59.000Z

450

Analysis of Antarctic Sea Ice Thickness: A Newly Created Database for 2000-2009  

E-Print Network (OSTI)

Observations of Antarctic sea ice thickness are sporadic in space and time, hindering knowledge of its variability. A proxy based on stage of development data from the National Ice Center (NIC) weekly operational charts is used to create a high...

Morgan, Benjamin Patrick

2012-10-19T23:59:59.000Z

451

Global ice cloud observations: radiative properties and statistics from moderate-resolution imaging spectroradiometer measurements  

E-Print Network (OSTI)

Ice clouds occur quite frequently, yet so much about these clouds is unknown. In recent years, numerous investigations and field campaigns have been focused on the study of ice clouds, all with the ultimate goal of gaining a better understanding...

Meyer, Kerry Glynne

2009-05-15T23:59:59.000Z

452

SciTech Connect: Predicting Land-Ice Retreat and Sea-Level Rise...  

NLE Websites -- All DOE Office Websites (Extended Search)

Conference: Predicting Land-Ice Retreat and Sea-Level Rise with the Community Earth System Model Citation Details In-Document Search Title: Predicting Land-Ice Retreat and...

453

Acceleration of the contribution of the Greenland and Antarctic ice sheets to sea level rise  

E-Print Network (OSTI)

make a large sea?level rise contribu- tion, Geophys. Res.and Antarctic ice sheets to sea level rise E. Rignot, 1,2 I.ice sheets to sea level rise, Geophys. Res. Lett. , 38,

Rignot, E.; Velicogna, I.; van den Broeke, M. R; Monaghan, A.; Lenaerts, J. T. M

2011-01-01T23:59:59.000Z

454

E-Print Network 3.0 - amery ice shelf Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

enhance basal ice shelf melting around Antarctica Summary: to the absence of local ISM cooling. Only at the Amery ice shelf (AIS) is our ISM one order of magnitude higher... and...

455

Hydrographic Preconditioning for Seasonal Sea Ice Anomalies in the Labrador Sea  

E-Print Network (OSTI)

This study investigates the hydrographic processes involved in setting the maximum wintertime sea ice (SI) extent in the Labrador Sea and Baffin Bay. The analysis is based on an ocean and sea ice state estimate covering ...

Fenty, Ian

456

Model estimates of the mass balance of the Greenland and Antartic ice sheets  

E-Print Network (OSTI)

The six possible combinations of two climate models and three methods for calculating the melting of snow and ice are used to estimate current values of accumulation and ablation on the Greenland and Antarctic ice sheets. ...

Bugnion, Vronique.

457

Prediction of Ice Crystal Number in Community Atmospheric Model (CAM3.0)  

NLE Websites -- All DOE Office Websites (Extended Search)

Prediction of Ice Crystal Number in Community Atmospheric Model (CAM3.0) Prediction of Ice Crystal Number in Community Atmospheric Model (CAM3.0) Liu, Xiaohong Pacific Northwest National Laboratory Ghan, Steven Pacific Northwest National Laboratory Wang, M University of Michigan Penner, Joyce University of Michigan Category: Modeling A prognostic equation of ice crystal number concentrations is implemented in the Community Atmospheric Model (CAM3.0) with the aim to study the aerosol effects on climate through changing the ice cloud properties. The microphysical processes affecting the ice number concentration include ice nucleation, secondary production of crystals, and the conversion of ice to snow. For ice nucleation process, Liu and Penner (2005) parameterization of homogeneous nucleation of sulfate and heterogeneous immersion nucleation on

458

Analysis of the Ross Ice Shelf Airstream Forcing Mechanisms Using Self-Organizing Maps  

Science Journals Connector (OSTI)

The Ross Ice Shelf airstream (RAS), a prominent transport mechanism of cold, continental air to the north, is the most common wind pattern over the Ross Ice Shelf, Antarctica. The forcing mechanisms of the RAS include katabatic drainage, mesoscale ...

Melissa A. Nigro; John J. Cassano

2014-12-01T23:59:59.000Z

459

Prediction of In-Cloud Icing Conditions at Ground Level Using the WRF Model  

Science Journals Connector (OSTI)

In-cloud icing on aircraft and ground structures can be observed every winter in many countries. In extreme cases ice can cause accidents and damage to infrastructure such as power transmission lines, telecommunication towers, wind turbines, ski ...

Bjrn Egil Kringlebotn Nygaard; Jn Egill Kristjnsson; Lasse Makkonen

2011-12-01T23:59:59.000Z

460

Surface Soil  

NLE Websites -- All DOE Office Websites (Extended Search)

Surface Soil 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 Laboratory operations. April 12, 2012 Farm soil sampling Two LANL environmental field team members take soil samples from a farm. Contact Environmental Communication & Public Involvement P.O. Box 1663 MS M996 Los Alamos, NM 87545 (505) 667-0216 Email Measurements are compared to samples from the regional sites and compared to averages over time to see if there are changes in concentrations. Monitoring surface soil LANL has monitored surface soils since the early 1970s. Institutional surface soil samples are collected from 17 on-site, 11 perimeter, and six regional (background) locations every three years.

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Ice plug employed on subsea pipeline bend during repair  

SciTech Connect

The first controlled-temperature ice plug in the bend of an offshore gas trunkline has been carried out for Phillips Petroleum Co. Norway on its Norpipe A.S. platform in the German sector of the North Sea. The procedure was part of a subsea valve repair operation. The ice plug was successfully formed offshore and tested to a differential pressure of 1,450 psi. Repair of two valves required only 5 days during which time gas production was operating at close to 50--60% via the platform bypass, says the service company. The paper discusses the procedure.

NONE

1997-12-22T23:59:59.000Z

462

Hydrogen Station & ICE Vehicle Operations and Testing  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Station & ICE Vehicle Operations and Testing Jim Francfort for Lee Slezak WestStart CALSTART Hydrogen Internal Combustion Engine Symposium - February 2006 INL/CON-06-01109 Presentation Outline * Background and Goal * Arizona Public Service (APS) Alternative Fuel (Hydrogen) Pilot Plant - design and operations * Fuel Dispensing * Prototype Dispenser Testing * Hydrogen and HCNG Internal Combustion Engine (ICE) Vehicle Testing Activities * WWW Information AVTA Background and Goal * AVTA is part of the U.S. Department of Energy's FreedomCAR and Vehicle Technologies Program * These activities are conducted by the Idaho National Laboratory (INL) and the AVTA testing partner Electric Transportation Applications * AVTA Goal - Provide benchmark data for technology

463

Assessment Report  

Energy Savers (EERE)

Assessment Report Assessment of Audit Coverage of Cost Allowability for Lawrence Livermore National Laboratory under Department of Energy Contract No. DE-AC52-07NA27344 during...

464

Ice at the Interface: Atmosphere-Ice-Ocean Boundary Layer Processes and Their Role in Polar Change---Workshop Report  

SciTech Connect

The atmosphere-ocean boundary layer in which sea ice resides includes many complex processes that require a more realistic treatment in GCMs, particularly as models move toward full earth system descriptions. The primary purpose of the workshop was to define and discuss such coupled processes from observational and modeling points of view, including insight from both the Arctic and Antarctic systems. The workshop met each of its overarching goals, including fostering collaboration among experimentalists, theorists and modelers, proposing modeling strategies, and ascertaining data availability and needs. Several scientific themes emerged from the workshop, such as the importance of episodic or extreme events, precipitation, stratification above and below the ice, and the marginal ice zone, whose seasonal Arctic migrations now traverse more territory than in the past.

Hunke, Elizabeth C. [Los Alamos National Laboratory

2012-07-23T23:59:59.000Z

465

Cold Air Distribution in Office Buildings: Technology Assessment for California  

E-Print Network (OSTI)

available. The cooling plant is an ice harvester designedused for ice making or for building cooling. During iceyears. The cooling plant is a Mueller ice harvester system

Bauman, F.S.

2008-01-01T23:59:59.000Z

466

Light-scattering properties of plate and column ice crystals generated in a laboratory cold chamber  

E-Print Network (OSTI)

with a diode laser beam. This cloud chamber produces distinct plate and hollow column ice crystal types. The cloud chamber developed at the Desert Re- search Institute has been used to produce ice clouds composedLight-scattering properties of plate and column ice crystals generated in a laboratory cold chamber

Liou, K. N.

467

A model for the consolidation of rafted sea ice , D. L. Feltham2,3  

E-Print Network (OSTI)

. This process is widespread in the North Caspian Sea where multiple rafting produces thick sea ice features floes override one another multiple times to produce thick sea ice features [Babko et al., 2002A model for the consolidation of rafted sea ice E. Bailey1 , D. L. Feltham2,3 , and P. R. Sammonds1

Feltham, Daniel

468

A model for the consolidation of rafted sea ice E. Bailey,1  

E-Print Network (OSTI)

ice. This process is widespread in the north Caspian Sea, where multiple rafting produces thick sea override one another multiple times to produce thick sea ice features [Babko et al., 2002]. This process observed that as many as four layers of ice were rafted in the southeastern Beaufort Sea to produce a total

Feltham, Daniel

469

On the development of ice-templated silicon carbide scaffolds for nature-inspired structural materials  

E-Print Network (OSTI)

received most interest as a means to produce porous scaffolds by using ice as a template for complexOn the development of ice-templated silicon carbide scaffolds for nature-inspired structural of ceramic scaffolds using the ice-templating, or freeze casting, technique provides a relatively simple

Ritchie, Robert

470

HIGH-RESOLUTION LAND/ICE IMAGING USING SEASAT SCATTEROMETER MEASUREMENTS  

E-Print Network (OSTI)

scatterometers which would permit the method to produce 1-2 km resolution over land and ice. The highHIGH-RESOLUTION LAND/ICE IMAGING USING SEASAT SCATTEROMETER MEASUREMENTS D. G. Long*, P. T. Whiting by the scatterometer,is expected to significantly enhance the utility of sca.tteroineter data in various land, ice

Long, David G.

471

The role of acids in electrical conduction through ice David E. Stillman,1  

E-Print Network (OSTI)

the soluble impurities common in polar ice, acids produce the largest conductivity response per unit bulkThe role of acids in electrical conduction through ice David E. Stillman,1 Joseph A. MacGregor,2] Electrical conduction through meteoric polar ice is controlled by soluble impurities that originate mostly

Stillman, David E.

472

Multi-Annual Changes in Microwave Backscatter over the Greenland Ice Sheet  

E-Print Network (OSTI)

Multi-Annual Changes in Microwave Backscatter over the Greenland Ice Sheet Ivan S. Ashcraft in the location of key ice facies/zones on the Greenland ice sheet are considered key indicators of global climate the SIR al- gorithm to produce u" images, the meiisurements made by these sensors over Greenland

Long, David G.

473

Effects of polar ice on the Earth's rotation and gravitational potential  

Science Journals Connector (OSTI)

......central ice cap were averaged to provide the time series for the latitudes 67"to 75", and the one ice core record at Camp Century in northwestern Greenland was used for the area north of 75"N Lat. As with the Antarctic ice cores, the means and......

Andrew S. Trupin

1993-05-01T23:59:59.000Z

474

Antarctic Ice Sheet: Preliminary Results of First Core Hole to Bedrock  

Science Journals Connector (OSTI)

...unconsolidated sediment, such as glacial till, rather than solid rock. Glacial till underlies the Greenland ice sheet at Camp Century (4). Liquid water was encountered at the ice-rock interface, clear evidence that the bottom of the ice sheet is...

Anthony J. Gow; Herbert T. Ueda; Donald E. Garfield

1968-09-06T23:59:59.000Z

475

In the Greenland and Norwegian Seas, sea ice advanced farther south and persisted  

E-Print Network (OSTI)

at high latitudes, ice-age conditions were not so different from those of today, with global cooling was that the larger area of snow and ice produced a cooling feedback through increased reflection of solarenergy, which found considerable ice-age cooling off Peru and along the Equator10 . Although the aver- age

Kurapov, Alexander

476

Great Lakes Ice Cycle Primary Investigator: Raymond Assel -NOAA GLERL (Emeritus)  

E-Print Network (OSTI)

and cooling water intakes, and damaging shoreline structures. The ice cover also has an impact on the waterGreat Lakes Ice Cycle Primary Investigator: Raymond Assel - NOAA GLERL (Emeritus) Co Board The formation, duration, and extent of ice cover on the Great Lakes has a major impact

477

Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period  

E-Print Network (OSTI)

Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period R (2006), Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period histories from ice coring of Greenland and Antarctica over the period 2 to 45 ka, using SO4 anomalies

Price, P. Buford

478

NOAA Technical Memorandum ERL GLERL-26 SUMMARY OF GREAT LAKES WEATHER AND ICE CONDITIONS,  

E-Print Network (OSTI)

.1.3 Satellite Imagery 3.2 General Description 3.2.1 Fall Cooling Phase 3.2.2 Ice Formation and Breakup Phases 3NOAA Technical Memorandum ERL GLERL-26 SUMMARY OF GREAT LAKES WEATHER AND ICE CONDITIONS, WINTER Degree-Days 2.3 Comparison With Previous Winters 3. SIJNNARY OF ICE CONDITIONS 3.1 Data Collection

479

A Finite Element Model for Ice Ball Evolution in a Multi-probe Cryosurgery  

E-Print Network (OSTI)

to intracellular ice injury for fast cooling rates, and solution effects injury for slow cooling rates. BasicallyA Finite Element Model for Ice Ball Evolution in a Multi-probe Cryosurgery RICHARD WANa, *, ZHIHONG October 2002; In final form 8 May 2003) The ice formation in a water body is examined for the computation

Wan, Richard G.

480

Hysteresis in Cenozoic Antarctic ice-sheet variations David Pollarda,*, Robert M. DeContob,1  

E-Print Network (OSTI)

., 2000). These and other data suggest a long period of virtually ice-free cooling during the EoceneHysteresis in Cenozoic Antarctic ice-sheet variations David Pollarda,*, Robert M. DeContob,1 A coupled global climate­Antarctic ice sheet model is run for 10 million years across the Eocene

Note: This page contains sample records for the topic "assessing surface ice" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Sensitivity of Cenozoic Antarctic ice sheet variations to geothermal heat flux  

E-Print Network (OSTI)

Sensitivity of Cenozoic Antarctic ice sheet variations to geothermal heat flux David Pollard a sheet to geothermal heat flux is investigated, using a coupled climate­ice sheet model with various prescribed values and patterns of geothermal heat flux. The sudden growth of major ice across the Eocene

482

Qualitative properties of the ice-thickness in a 3D model  

Science Journals Connector (OSTI)

In this work we consider a 3D isothermal mathematical model for ice sheets flows over a horizontal bedrock. The model is derived from the mechanics and dynamics of ice sheets and experimental results carried out in Glaciology. The final formulation of ... Keywords: existence, finite speed of propagations, ice sheet dynamics, uniqueness, waiting time

S. N. Antontsev; H. B. De Oliveira

2008-03-01T23:59:59.000Z

483

Global Land Ice Measurements from Space Publisher: Springer Praxis Books, Subseries: Geophysical Sciences  

E-Print Network (OSTI)

Global Land Ice Measurements from Space Publisher: Springer Praxis Books, Subseries: Geophysical perceptions about the importance of fluctuations of glaciers and ice sheets (Jeffrey S. Kargel) 1.1Early.2.2. Modern impacts of changing glaciers and ice sheets on people 0.2.3. Recent public perceptions about

484

Parameterization of shortwave ice cloud optical properties for various particle habits  

E-Print Network (OSTI)

: Remote sensing; KEYWORDS: clouds, optical properties, radiative transfer, ice particles 1. IntroductionParameterization of shortwave ice cloud optical properties for various particle habits Jeffrey R 2001; accepted 1 December 2001; published 12 July 2002. [1] The relative importance of ice clouds

Baum, Bryan A.

485

Figure 1. Recurrent modular network architecture Recurrent modular network architecture for sea ice  

E-Print Network (OSTI)

). Classification of sea ice in MIZ is important for navigation in these regions and for accurate evaluation of heatFigure 1. Recurrent modular network architecture Recurrent modular network architecture for sea ice classification in the Marginal Ice Zone using ERS SAR images Andrey V. Bogdanov1a , Marc Toussaint1b , Stein

Toussaint, Marc

486

SHAPE-CONSTRAINED SEGMENTATION APPROACH FOR ARCTIC MULTIYEAR SEA ICE FLOE ANALYSIS  

E-Print Network (OSTI)

for automatic ice floe tracking from Synthetic Aperture Radar or optical remote sensing imagery employ adaptiveSHAPE-CONSTRAINED SEGMENTATION APPROACH FOR ARCTIC MULTIYEAR SEA ICE FLOE ANALYSIS Yuliya Tarabalka Research Association, MD, USA. e-mail: yuliya.tarabalka@inria.fr ABSTRACT The melting of sea ice

Boyer, Edmond

487

Turbulent models of ice giant internal dynamics: Dynamos, heat transfer, and zonal flows  

E-Print Network (OSTI)

Turbulent models of ice giant internal dynamics: Dynamos, heat transfer, and zonal flows K Magnetic fields a b s t r a c t The ice giant planets, Uranus and Neptune, have magnetic fields to yield small-scale and disorganized turbulence. In agreement with ice giant observations, both

488

Can a Convective Cloud Feedback Help to Eliminate Winter Sea Ice at High CO2 Concentrations?  

E-Print Network (OSTI)

have remote effects on global climate as well. Accurate forecasting of winter sea ice has significantCan a Convective Cloud Feedback Help to Eliminate Winter Sea Ice at High CO2 Concentrations? DORIAN) ABSTRACT Winter sea ice dramatically cools the Arctic climate during the coldest months of the year and may

Tziperman, Eli

489

The Atmospheric Response to Realistic Reduced Summer Arctic Sea Ice Anomalies  

E-Print Network (OSTI)

for the continued ice melt [Polyakov et al., 2005], and recent work shows that heat from the Atlantic layer can91 The Atmospheric Response to Realistic Reduced Summer Arctic Sea Ice Anomalies Uma S. Bhatt,1 and Robert A. Tomas3 The impact of reduced Arctic summer sea ice on the atmosphere is investigated by forcing

Bhatt, Uma

490

Sensitivity of sea ice to physical parameterizations in the GISS global climate model  

E-Print Network (OSTI)

absorbed by the polar regions. Second, sea ice has a strong insulating effect on the under- lying oceanSensitivity of sea ice to physical parameterizations in the GISS global climate model Jiping Liu,1 coupled model is used to investigate the sensitivity of sea ice to each of the following parameterizations

491

Recent Arctic Sea Ice Variability: Connections to the Arctic Oscillation and the ENSO  

E-Print Network (OSTI)

of regional and global climate through the ice albedo feed- back, insulating effect, deep water formationRecent Arctic Sea Ice Variability: Connections to the Arctic Oscillation and the ENSO Jiping Liu; accepted 20 April 2004; published 13 May 2004. [1] Trends in the satellite-derived Arctic sea ice

492

Response of the Northern Hemisphere sea ice to greenhouse forcing in a global climate model  

E-Print Network (OSTI)

in summer, in part because of the reductions in ice cover and thickness that insulate the winter atmosphereResponse of the Northern Hemisphere sea ice to greenhouse forcing in a global climate model Larissa warming of about 4³C for doubled CO2. Enhanced warming is found at higher latitudes near sea-ice margins

493

Abrupt climate shifts in Greenland due to displacements of the sea ice edge  

E-Print Network (OSTI)

by insulating the atmosphere from the substantial heat capacity of the ocean. When sea ice is absent, the oceanAbrupt climate shifts in Greenland due to displacements of the sea ice edge Camille Li,1 David S that a reduction in sea ice extent in the North Atlantic produces a climatic response consistent with abrupt

Schrag, Daniel

494

Ordered spin-ice state in the geometrically frustrated metallic-ferromagnet Surjeet Singh1*  

E-Print Network (OSTI)

of the most remarkable is the discovery of spin-ice hal-00158081,version1-27Jun2007 #12;2 state in insulating1 Ordered spin-ice state in the geometrically frustrated metallic-ferromagnet Sm2Mo2O7 Surjeet, Indian Institute of Science, Bangalore 560012, India. The recent discovery of Spin-ice is a spectacular

Paris-Sud XI, Université de

495

Modelling the reorientation of sea-ice faults as the wind changes direction  

E-Print Network (OSTI)

in the Ant- arctic. As sea ice reflects up to 80% of incident solar radiation, insulates the ocean fromModelling the reorientation of sea-ice faults as the wind changes direction Alexander V. WILCHINSKY-1290, USA ABSTRACT. A discrete-element model of sea ice is used to study how a 908 change in wind direction

Feltham, Daniel

496

Linear weakening of the AMOC in response to receding glacial ice sheets in CCSM3  

E-Print Network (OSTI)

North Atlantic; this expanded sea ice insulates the ocean from heat loss and leads to suppressed deepLinear weakening of the AMOC in response to receding glacial ice sheets in CCSM3 Jiang Zhu1 The transient response of the Atlantic Meridional Overturning Circulation (AMOC) to a deglacial ice sheet

Eisenman, Ian

497

The influence of ocean flow on newly forming sea ice Daniel L. Feltham  

E-Print Network (OSTI)

-precipitation cycle in the remainder of the world's oceans [Aagaard and Carmack, 1994]. Sea ice insulates the oceanThe influence of ocean flow on newly forming sea ice Daniel L. Feltham Centre for Polar Observation sensitive to the growth and decay of sea ice and the interaction between the heat and salt fields

Feltham, Daniel

498

Ice-free conditions in Sweden during Marine Oxygen Isotope Stage 3? BARBARA WOHLFARTH  

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Ice-free conditions in Sweden during Marine Oxygen Isotope Stage 3? BARBARA WOHLFARTH BOREAS Wohlfarth, B. 2010 (April): Ice-free conditions in Sweden during Marine Oxygen Isotope Stage 3? Boreas, Vol dates for Sweden older than the Last Glacial Maximum ice advance were eval- uated. Acceptable 14 C dates

Wohlfarth, Barbara

499

EXPLICIT SIMULATION OF ICE PARTICLE HABITS IN A NUMERICAL WEATHER PREDICTION MODEL  

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EXPLICIT SIMULATION OF ICE PARTICLE HABITS IN A NUMERICAL WEATHER PREDICTION MODEL by Tempei This study develops a scheme for explicit simulation of ice particle habits in Cloud Resolving Models (CRMs is called Spectral Ice Habit Prediction System (SHIPS), which represents a continuous-property approach

Wisconsin at Madison, University of

500

ERDC/CRRELTR-06-16 Propagation of Uncertainties in Sea Ice  

E-Print Network (OSTI)

of the global heat bal- ance. This capability is attributed to the unique location of sea ice at the interface in the polar region has precipitated increased efforts to measure sea ice thickness as an index for global heatERDC/CRRELTR-06-16 Propagation of Uncertainties in Sea Ice Thickness Calculations from Basin

Geiger, Cathleen