Powered by Deep Web Technologies
Note: This page contains sample records for the topic "marine boundary layer" 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.


1

Development and propagation of a pollution gradient in the marine boundary layer during INDOEX (1999)  

E-Print Network (OSTI)

Development and propagation of a pollution gradient in the marine boundary layer during INDOEX (1999) Matthew Simpson and Sethu Raman Department of Marine, Earth, and Atmospheric Sciences, North and propagation of a pollution gradient in the marine boundary layer over the Arabian Sea during the Intensive

Raman, Sethu

2

High resolution properties of the marine atmospheric boundary layer  

SciTech Connect

Los Alamos National Laboratory (LANL) participated in the Central Equatorial Pacific Experiment (CEPEX) by fielding a water-vapor Raman lidar on board the Research Vessel Vickers. The lidar measured water vapor concentration from the surface to lower tropospheric altitudes in order to support the CEPEX goal of evaluating a hypothesis regarding feedback mechanisms for global circulation models. This report describes some of the features observed within the marine Atmospheric Boundary Layer (ABL) and the lower troposphere. Data was collected continuously 24 hours per day over the equatorial Pacific from March 8th to March 2 1st of 1993 while in route between Guadalcanal and Christmas Island (the transect was at approximately 2{degree} south latitude). The lidar collected vertical transects of water vapor concentration up to 10 km during night operations and 4 km in the day. The vertical lidar profiles of water vapor were produced by summing the data over a period up to 600 seconds. The water-vapor Raman lidar measured the properties of the marine ABL as well as the lower and mid-troposphere. From the lidar water vapor profiles, ``images`` of water vapor concentration versus altitude and date or sea surface temperature will be produced along with other products such as latent heat fluxes. The Raman water vapor lidar data will be used to better understand the role of transport and exchange at the ocean-atmosphere interface and throughout the marine atmosphere.

Cooper, D.; Cottingame, W.; Eichinger, W.; Forman, P.; Lebeda, C.; Poling, D.; Thorton, R.

1994-02-01T23:59:59.000Z

3

Acoustic sounding of the tropical marine boundary layer during GATE  

Science Journals Connector (OSTI)

A vertically pointed monostatic acoustic sounder was installed on the NOAA ShipOCEANOGRAPHER during the Global Atmospheric Research Program Atlantic Tropical Experiment (GATE). The sounderantenna was mounted on a gyrocontrolled platform to compensate for the ship'spitch and roll motions. Extensive measures such as mounting the antenna assembly on a vibration isolator and installing absorbing cuffs had to be taken to reduce interference by ship?generated noise. Back?scattered acoustic data obtained from up to 850 m height describe the tropical marine boundary layer in unique and hitherto unseen detail. During undisturbed weather conditions the facsimile record showed convective plumes rising from the surface of the water up to 400 m. Storm?generated disturbances resulted in a substantial modification of the boundary layer; low?level multilayered undulating inversions formed from cool outflow currents. The inversions persisted for up to 16 hours. Low?level patchy cumulus clouds produced characteristic hummock?shaped acoustic echoes. Analysis of the Doppler frequency shift of the returns allowed the determination of vertical velocities within these clouds and underlying convective plumes.

P. A. Mandics; J. E. Gaynor; F. F. Hall Jr.

1976-01-01T23:59:59.000Z

4

Airship Measurements of Ship’s Exhaust Plumes and Their Effect on Marine Boundary Layer Clouds  

Science Journals Connector (OSTI)

High-resolution aerosol, trace gas, and cloud microphysical measurements were made from an airship during transects across ships exhaust plumes advecting downwind of ships in the marine boundary layer (MBL). This study was part of the Office of ...

G. M. Frick; W. A. Hoppel

2000-08-01T23:59:59.000Z

5

Quantifying the Hygroscopic Growth of Marine Boundary Layer Aerosols by Satellite-base and Buoy Observations  

Science Journals Connector (OSTI)

In this study, collocated satellite and buoy observations as well as satellite observations over an extended region during 2006-2010 were used to quantify the humidity effects on marine boundary layer (MBL) aerosols. Although the near-surface ...

Tao Luo; Renmin Yuan; Zhien Wang; Damao Zhang

6

Large-Eddy Simulation of Marine Atmospheric Boundary Layers above a Spectrum of Moving Waves  

Science Journals Connector (OSTI)

Momentum and scalar transport in the marine atmospheric boundary layer (MABL) is driven by a turbulent mix of winds, buoyancy, and surface gravity waves. To investigate the interaction between these processes, a large-eddy simulation (LES) model ...

Peter P. Sullivan; James C. McWilliams; Edward G. Patton

2014-11-01T23:59:59.000Z

7

Investigation of the Diurnal Variation of Marine Boundary Layer Cloud Microphysical Properties at the Azores  

Science Journals Connector (OSTI)

A new method has been developed to retrieve the nighttime marine boundary layer (MBL) cloud microphysical properties, which provides a complete 19-month dataset to investigate the diurnal variation of MBL cloud microphysical properties at the ...

Xiquan Dong; Baike Xi; Peng Wu

2014-12-01T23:59:59.000Z

8

Boundary Layer  

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

Sea Spray on the Thermodynamics of the Hurricane Boundary Layer For original submission and image(s), see ARM Research Highlights http:www.arm.govsciencehighlights Research...

9

Continuous daily observation of the marine atmospheric boundary layer over the Kuroshio current by a helicopter shuttle service  

Science Journals Connector (OSTI)

We describe a new initiative in which in-situ observations of the marine atmospheric boundary layer (MABL) are made by a helicopter shuttle connecting six islands south of Tokyo. This observation method aims to make frequent measurements of ...

Youichi Tanimoto; Kou Shimoyama; Shoichi Mori

10

Doppler Lidar–Based Wind-Profile Measurement System for Offshore Wind-Energy and Other Marine Boundary Layer Applications  

Science Journals Connector (OSTI)

Accurate measurement of wind speed profiles aloft in the marine boundary layer is a difficult challenge. The development of offshore wind energy requires accurate information on wind speeds above the surface at least at the levels occupied by ...

Yelena L. Pichugina; Robert M. Banta; W. Alan Brewer; Scott P. Sandberg; R. Michael Hardesty

2012-02-01T23:59:59.000Z

11

Accumulation mode aerosol, pockets of open cells, and particle nucleation in the remote subtropical Pacific marine boundary layer  

E-Print Network (OSTI)

Accumulation mode aerosol, pockets of open cells, and particle nucleation in the remote subtropical in the remote subtropical Pacific marine boundary layer, J. Geophys. Res., 111, D02206, doi:10.1029/2004JD005694 the boundary layer via its action on the budgets of heat and water substance. A plausible consequence may

Russell, Lynn

12

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

SciTech Connect

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

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

2014-01-02T23:59:59.000Z

13

Understanding the role of organic aerosol in the coastal and remote pacic marine boundary layer  

E-Print Network (OSTI)

Absorbance Polluted Marine Fossil Fuel Combustion BiomassBiomass Fossil Fuel Polluted Marine Burning Combustion FTIRof both coastal fossil fuel combustion and marine sources of

Hawkins, Lelia Nahid

2010-01-01T23:59:59.000Z

14

Aircraft Observations of the Marine Boundary Layer Adjustment near Point Arguello, California  

E-Print Network (OSTI)

.g., Parish 2000). Several authors (e.g., Dorman 1985; Samelson 1992; Burk et al. 1999; Haack et al. 2001) represent the fluid system near the coast in terms of a two-layer shallow water model with the coastal terrain serving as a lateral boundary. The Froude... of the layer. Discontinuities such as hy- draulic jumps can result as the flow transitions from supercritical (Fr. 1) to subcritical (Fr, 1). As the flow in the MBL impinges on coastal points, significant modulation of the MBL height and wind field occurs...

Parish, Thomas R.; Rahn, David A.; Leon, David

2014-04-01T23:59:59.000Z

15

Magnetohydrodynamic boundary layer control system  

SciTech Connect

Accordingly, it is an object of the present invention to provide an active boundary layer control system which is lightweight, operates with low in put power, and occupies little physical space. It is a further object of the invention to provide a boundary layer control system which is robust and can be operated in a damaged condition without creating a hazard to the vehicle. It is yet object of the invention to provide a magnetohydrodynamic (MHD) boundary layer control system for marine vehicles which provides a force directly on the water adjacent to the vehicle hull to provide flow separation control. The invention is a boundary layer control system using magnetic and electric fields interaction to providea driving force to energize boundary layer flow around a marine vehicle. A plurality of magnets are located circumferentially around the hull. Seawater electrodes are placed between each of the magnets and between the poles of each magnet. The resulting interaction of the electric and magnetic fields produces a Lorentz force which reduces the turbulence and may even relaminarize the flow in the boundary layer.

Meng, J.C.

1993-02-11T23:59:59.000Z

16

Understanding the role of organic aerosol in the coastal and remote pacic marine boundary layer  

E-Print Network (OSTI)

whereas fossil fuel combustion and biomass burning emissionsof fossil fuel combustion and biomass burning emissionsMarine Fossil Fuel Combustion Biomass Burning Frequency (

Hawkins, Lelia Nahid

2010-01-01T23:59:59.000Z

17

Measurements of diurnal variations and Eddy Covariance (EC) fluxes of glyoxal in the1 tropical marine boundary layer: description of the Fast LED-CE-DOAS instrument2  

E-Print Network (OSTI)

marine boundary layer: description of the Fast LED-CE-DOAS instrument2 3 4 S. Coburn1,2 , I. Ortega1 Emitting Diode Cavity Enhanced Differential Optical Absorption24 Spectroscopy (Fast LED-CE-DOAS) instrument Halogens28 and OVOC (TORERO) field experiment (January to March 2012). The Fast LED-CE-DOAS is a29

18

Clouds, Aerosol, and Precipitation in the Marine Boundary Layer: Analysis of Results from the ARM Mobile Facility Deployment to the Azores (2009/2010)  

SciTech Connect

The project focuses upon dataset analysis and synthesis of datasets from the AMF deployment entitled “Clouds, Aerosols, and Precipitation in the Marine Boundary Layer (CAP?MBL)” at Graciosa Island in the Azores. Wood is serving a PI for this AMF deployment.

Wood, Robert [University of Washington, Dept of Atmos Sci

2013-05-31T23:59:59.000Z

19

Transitions of cloud-topped marine boundary layers characterized by AIRS, MODIS, and a large eddy simulation model  

SciTech Connect

Cloud top entrainment instability (CTEI) is a hypothesized positive feedback between entrainment mixing and evaporative cooling near the cloud top. Previous theoretical and numerical modeling studies have shown that the persistence or breakup of marine boundary layer (MBL) clouds may be sensitive to the CTEI parameter. Collocated thermodynamic profile and cloud observations obtained from the Atmospheric Infrared Sounder (AIRS) and Moderate Resolution Imaging Spectroradiometer (MODIS) instruments are used to quantify the relationship between the CTEI parameter and the cloud-topped MBL transition from stratocumulus to trade cumulus in the northeastern Pacific Ocean. Results derived from AIRS and MODIS are compared with numerical results from the UCLA large eddy simulation (LES) model for both well-mixed and decoupled MBLs. The satellite and model results both demonstrate a clear correlation between the CTEI parameter and MBL cloud fraction. Despite fundamental differences between LES steady state results and the instantaneous snapshot type of observations from satellites, significant correlations for both the instantaneous pixel-scale observations and the long-term averaged spatial patterns between the CTEI parameter and MBL cloud fraction are found from the satellite observations and are consistent with LES results. This suggests the potential of using AIRS and MODIS to quantify global and temporal characteristics of the cloud-topped MBL transition.

Yue, Qing; Kahn, Brian; Xiao, Heng; Schreier, Mathias; Fetzer, E. J.; Teixeira, J.; Suselj, Kay

2013-08-16T23:59:59.000Z

20

Preliminary Results from Long-Term Measurements of Atmospheric Moisture in the Marine Boundary Layer in the Gulf of Mexico*  

Science Journals Connector (OSTI)

Measurements of boundary layer moisture have been acquired from Rotronic MP-100 sensors deployed on two National Data Buoy Center (NDBC) buoys in the northern Gulf of Mexico from June through November 1993. For one sensor that was retrieved ...

Laurence C. Breaker; David B. Gilhousen; Lawrence D. Burroughs

1998-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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

Clouds, Aerosols and Precipitation in the Marine Boundary Layer (CAP-MBL) AMF Deployment Graciosa Island, Azores, NE Atlantic Ocean May 2009-December 2010  

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

the Marine Boundary Layer (CAP-MBL) Graciosa Island, Azores, NE Atlantic Ocean May 2009-December 2010 Rob Wood, University of Washington CAP-MBL Proposal Team AMF Deployment Team Thanks to Mark Miller: AMF Site Scientist Kim Nitschke: AMF Site Manager Importance of Low-Clouds for Climate Imperative that we understand the processes controlling the formation, maintenance and dissipation of low clouds in order to improve their representation in climate models. Which clouds matter for climate sensitivity? Climate Feedbacks Model Intercomparison Project (CFMIP) 12 slab ocean models 2xCO 2 - control Correlation of global mean CRF with local values Mark Webb, Hadley Center 90 N 45 N 0 45 S 90S 0 90 E 180 90 W 0

22

Chemical Speciation of Sulfur in Marine Cloud Droplets and Particles: Analysis of Individual Particles from Marine Boundary Layer over the California Current  

SciTech Connect

Detailed chemical speciation of the dry residue particles from individual cloud droplets and interstitial aerosol collected during the Marine Stratus Experiment (MASE) was performed using a combination of complementary microanalysis techniques. Techniques include computer controlled scanning electron microscopy with energy dispersed analysis of X-rays (CCSEM/EDX), time-of-flight secondary ionization mass spectrometry (TOF-SIMS), and scanning transmission X-ray microscopy with near edge X-ray absorption fine structure spectroscopy (STXM/NEXAFS). Samples were collected at the ground site located in Point Reyes National Seashore, approximately 1 km from the coast. This manuscript focuses on the analysis of individual particles sampled from air masses that originated over the open ocean and then passed through the area of the California current located along the northern California coast. Based on composition, morphology, and chemical bonding information, two externally mixed, distinct classes of sulfur containing particles were identified: chemically modified (aged) sea salt particles and secondary formed sulfate particles. The results indicate substantial heterogeneous replacement of chloride by methanesulfonate (CH3SO3-) and non-sea salt sulfate (nss-SO42-) in sea-salt particles with characteristic ratios of nss-S/Na>0.10 and CH3SO3-/nss-SO42->0.6.

William R. Wiley Environmental Sciences Laboratory, Pacific Northwest National Laboratory; Gilles, Mary K; Hopkins, Rebecca J.; Desyaterik, Yury; Tivanski, Alexei V.; Zaveri, Rahul A.; Berkowitz, Carl M.; Tyliszczak, Tolek; Gilles, Mary K.; Laskin, Alexander

2008-03-12T23:59:59.000Z

23

Boundary-Layer Effects in Reverse Osmosis  

Science Journals Connector (OSTI)

Boundary-Layer Effects in Reverse Osmosis ... In FO, water is extracted from a feed solution using the high osmotic pressure of a hypertonic solution that flows on ... ...

Ulrich Merten; H. K. Lonsdale; R. L. Riley

1964-01-01T23:59:59.000Z

24

Observational Boundary Layer Energy and Water Budgets of the Stratocumulus-to-Cumulus Transition  

Science Journals Connector (OSTI)

The authors estimate summer mean boundary layer water and energy budgets along a northeast Pacific transect from 35° to 15°N, which includes the transition from marine stratocumulus to trade cumulus clouds. Observational data is used from three A-...

Peter Kalmus; Matthew Lebsock; Joăo Teixeira

2014-12-01T23:59:59.000Z

25

Transport Processes in the Tropical Warm Pool Boundary Layer. Part II: Vertical Structure and Variability  

Science Journals Connector (OSTI)

The structure of the intertropical convergence zone ITCZ cloud-topped marine atmospheric boundary layer away from the most intense mesoscale convective systems during the Tropical Ocean Global Atmosphere Coupled Ocean–Atmosphere Response ...

A. G. Williams; J. M. Hacker; H. Kraus

1997-08-01T23:59:59.000Z

26

ARM - Measurement - Planetary boundary layer height  

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

govMeasurementsPlanetary boundary layer height govMeasurementsPlanetary boundary layer height 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 : Planetary boundary layer height Top of the planetary boundary layer; also known as depth or height of the mixing layer. Categories Atmospheric State 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 VCEIL : Vaisala Ceilometer External Instruments NCEPGFS : National Centers for Environment Prediction Global Forecast System Field Campaign Instruments

27

Shipboard measurements of the cloud-capped marine boundary layer during FIRE/ASTEX. Technical progress report, October 1, 1992--September 30, 1993  

SciTech Connect

ASTEX is a large multi-agency program to investigate all aspects of marine stratus clouds because of their overall importance in regulating the earth`s climate system. The program focused on clouds in the Eastern Atlantic during the month of June, 1992 because of the expected frequency of low clouds in that area. The experiment was based on the islands of Santa Maria in the Azores and Porto Santo about 800 km away in the Madeira Archipelago with large complements of remote sensors operated from both islands. To form an equilateral triangle of remote sensors, a ship was used as the third platform.

Kropfil, R.A.

1993-09-30T23:59:59.000Z

28

ARM - Field Campaign - Boundary Layer Cloud IOP  

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

govCampaignsBoundary Layer Cloud IOP govCampaignsBoundary Layer Cloud IOP Campaign Links Campaign Images Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Boundary Layer Cloud IOP 2005.07.11 - 2005.08.07 Lead Scientist : William Shaw For data sets, see below. Description Investigators from Pacific Northwest National Laboratory, in collaboration with scientists from a number of other institutions, carried out a month of intensive measurements at the ARM Climate Research Facility on the North Slope of Alaska in the summer of 2005. The purpose of these measurements was to determine how much the arctic land surface modifies the way low clouds reflect, absorb, and transmit solar and infrared radiation. This is an important problem because arctic clouds play a prominent role in

29

Processes in the Magnetospheric Boundary Layer  

Science Journals Connector (OSTI)

The earth's magnetopause is a boundary that separates two distinctly different plasma regions - the (shocked) solar wind and the hot magnetospheric plasma controlled by the terrestrial magnetic field. Through this boundary a small fraction of the solar wind energy and momentum is transferred. This energy powers all major plasma processes within the magnetosphere. Thus, a proper understanding of boundary layer phenomena is of vital importance for magnetospheric plasma physics. An overview of the two main theories put forward to explain the energy and momentum transfer processes near the earth's magnetospheric boundary - magnetic merging/reconnection and the boundary layer dynamo model - will be given. The theories are compared with recent in situ plasma observations in the vicinity of the magnetopause. It is suggested here that internal processes in the magnetospheric boundary layer are decisive for the transfer of energy and momentum into the inner magnetosphere, which is coupled to the high latitude ionosphere. On the other hand, external conditions at the magnetopause proper determine the coupling to the solar wind. Means of relating transient magnetic field signatures, such as flux transfer events, with plasma dynamo induced currents will also be discussed.

Rickard Lundin

1987-01-01T23:59:59.000Z

30

Wind Structure in the Atmospheric Boundary Layer  

Science Journals Connector (OSTI)

13 May 1971 research-article Wind Structure in the Atmospheric Boundary Layer...semi-empirical laws for the variation of mean wind speed with height and for the statistical...provide some useful ordering of the mean wind profile characteristics in relation to...

1971-01-01T23:59:59.000Z

31

TURBULENCE IN SUPERSONIC AND HYPERSONIC BOUNDARY LAYERS  

E-Print Network (OSTI)

TURBULENCE IN SUPERSONIC AND HYPERSONIC BOUNDARY LAYERS Alexander J. Smits and M. Pino Martin in supersonic and hypersonic flow where the effects of compressibility have a direct influence on the turbulence. Experimental and DNS results are presented and compared. Key words: Turbulence, supersonic, hypersonic, shocks

MartĂ­n, Pino

32

Viscous drag reduction in boundary layers  

SciTech Connect

The present volume discusses the development status of stability theory for laminar flow control design, applied aspects of laminar-flow technology, transition delays using compliant walls, the application of CFD to skin friction drag-reduction, active-wave control of boundary-layer transitions, and such passive turbulent-drag reduction methods as outer-layer manipulators and complex-curvature concepts. Also treated are such active turbulent drag-reduction technique applications as those pertinent to MHD flow drag reduction, as well as drag reduction in liquid boundary layers by gas injection, drag reduction by means of polymers and surfactants, drag reduction by particle addition, viscous drag reduction via surface mass injection, and interactive wall-turbulence control.

Bushnell, D.M.; Hefner, J.N.

1990-01-01T23:59:59.000Z

33

Laminar boundary layers in convective heat transport  

E-Print Network (OSTI)

We study Rayleigh-Benard convection in the high-Rayleigh-number and high-Prandtl-number regime, i.e., we consider a fluid in a container that is exposed to strong heating of the bottom and cooling of the top plate in the absence of inertia effects. While the dynamics in the bulk are characterized by a chaotic convective heat flow, the boundary layers at the horizontal container plates are essentially conducting and thus the fluid is motionless. Consequently, the average temperature exhibits a linear profile in the boundary layers. In this article, we rigorously investigate the average temperature and oscillations in the boundary layer via local bounds on the temperature field. Moreover, we deduce that the temperature profile is indeed essentially linear close to the horizontal container plates. Our results are uniform in the system parameters (e.g. the Rayleigh number) up to logarithmic correction terms. An important tool in our analysis is a new Hardy-type estimate for the convecting velocity field, which can be used to control the fluid motion in the layer. The bounds on the temperature field are derived with the help of local maximal regularity estimates for convection-diffusion equations.

Christian Seis

2012-12-12T23:59:59.000Z

34

Multi-dimensional Longwave Forcing of Boundary Layer Cloud Systems  

SciTech Connect

The importance of multi-dimensional (MD) longwave radiative effects on cloud dynamics is evaluated in a large eddy simulation (LES) framework employing multi-dimensional radiative transfer (Spherical Harmonics Discrete Ordinate Method —SHDOM). Simulations are performed for a case of unbroken, marine boundary layer stratocumulus and a broken field of trade cumulus. “Snapshot” calculations of MD and IPA (independent pixel approximation —1D) radiative transfer applied to LES cloud fields show that the total radiative forcing changes only slightly, although the MD effects significantly modify the spatial structure of the radiative forcing. Simulations of each cloud type employing MD and IPA radiative transfer, however, differ little. For the solid cloud case, relative to using IPA, the MD simulation exhibits a slight reduction in entrainment rate and boundary layer TKE relative to the IPA simulation. This reduction is consistent with both the slight decrease in net radiative forcing and a negative correlation between local vertical velocity and radiative forcing, which implies a damping of boundary layer eddies. Snapshot calculations of the broken cloud case suggest a slight increase in radiative cooling, though few systematic differences are noted in the interactive simulations. We attribute this result to the fact that radiative cooling is a relatively minor contribution to the total energetics. For the cloud systems in this study, the use of IPA longwave radiative transfer is sufficiently accurate to capture the dynamical behavior of BL clouds. Further investigations are required in order to generalize this conclusion for other cloud types and longer time integrations. 1

Mechem, David B.; Kogan, Y. L.; Ovtchinnikov, Mikhail; Davis, Anthony B; Evans, K. F.; Ellingson, Robert G.

2008-12-20T23:59:59.000Z

35

Boundary layer response to wind gusts  

E-Print Network (OSTI)

of the wind tunnel sir stress caused by tbe addition of the in)actors, the decision was osde to use flew visuslstion ?echniques to detsreine if it wss possible to generate s lsuinar boundary layer on the flat plate. Loup black wss suspended in light..., 8. The data reduction procedure used in this thesis follcwed pxi- maxily the procsduxes of rafax'ence 8. Velocity fluctuations were detected using the constant current technique and computed based on square wave calibration. yor the constant...

Morland, Bruce Thomas

1968-01-01T23:59:59.000Z

36

Numerical Study of Freestream Waves Receptivity and Nonlinear Breakdown in Hypersonic Boundary Layer  

E-Print Network (OSTI)

Numerical Methods for Hypersonic Boundary Layer Stability.of Instability in a Hypersonic Boundary Layer. TheoreticalA. P. , Receptivity of Hypersonic Boundary Layer to Wall

Lei, Jia

2013-01-01T23:59:59.000Z

37

ARM - Field Campaign - Lower Atmospheric Boundary Layer Experiment  

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

govCampaignsLower Atmospheric Boundary Layer Experiment govCampaignsLower Atmospheric Boundary Layer Experiment Campaign Links LABLE Website Related Campaigns 2013 Lower Atmospheric Boundary Layer Experiment 2013.05.28, Turner, SGP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Lower Atmospheric Boundary Layer Experiment 2012.09.17 - 2012.11.13 Lead Scientist : David Turner Description Boundary layer turbulence is an important process that is parameterized in most atmospheric numerical models. Turbulence redistributes energy and mass within the boundary layer. Many different characteristics can impact the character of turbulence in the boundary layer, including different surface types, horizontal wind speed and direction, and the vertical temperature structure of the atmosphere. However, there have been few studies that have

38

Model of Trace Gas Flux in Boundary Layer  

E-Print Network (OSTI)

Mathematical model of the turbulent flux in the three-layer boundary system is presented. Turbulence is described as a presence of the nonzero vorticity. Generalized advection-diffusion-reaction equation is derived for arbitrary number components in the flux. The fluxes in the layers are objects for matching requirements on the boundaries between the layers.

I. I. Vasenev; I. S. Nurgaliev

2013-03-04T23:59:59.000Z

39

Turbulence Structure and Wall Signature in Hypersonic Turbulent Boundary Layer  

E-Print Network (OSTI)

Turbulence Structure and Wall Signature in Hypersonic Turbulent Boundary Layer Yin-Chiu Kan , Clara and hypersonic turbulent boundary layer datasets from direct numerical simulation (DNS). Contour plots and Marusic5 and Mathis, Hutchins and Marusic16 ). In contrast to supersonic and hypersonic flow regimes

MartĂ­n, Pino

40

Numerical Simulation of the Wave Bottom Boundary Layer  

E-Print Network (OSTI)

are coupled to the wave cycle; phases of accelerating ow organize the boundary layer structure, decelerating; Zhao and Anastasiou, 1993; Feddersen and Guza, 2000; and Rankin and Hires, 2000]; others have the boundary layer and induce an in ectional instability at ow reversal, while accelerations tend to organize

Slinn, Donald

Note: This page contains sample records for the topic "marine boundary layer" 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

Separation of climatological imprints of the Kuroshio Extension and Oyashio fronts on the wintertime atmospheric boundary layer: Their sensitivity to SST resolution prescribed for atmospheric reanalysis  

Science Journals Connector (OSTI)

Mesoscale structures of the wintertime marine atmospheric boundary layer (MABL) as climatological imprints of oceanic fronts within the Kuroshio-Oyashio Extension (KOE) region east of Japan are investigated, by taking advantage of high horizontal ...

Ryusuke Masunaga; Hisashi Nakamura; Takafumi Miyasaka; Kazuaki Nishii; Youichi Tanimoto

42

Performance of a boundary layer ingesting propulsion system  

E-Print Network (OSTI)

This thesis presents an assessment of the aerodynamic performance of an aircraft propulsion system, with embedded engines, in the presence of aircraft fuselage boundary layer ingestion (BLI). The emphasis is on defining ...

Plas, Angélique (Angélique Pascale)

2006-01-01T23:59:59.000Z

43

Examining A Hypersonic Turbulent Boundary Layer at Low Reynolds Number  

E-Print Network (OSTI)

The purpose of the current study was to answer several questions related to hypersonic, low Reynolds number, turbulent boundary layers, of which available data related to turbulence quantities is scarce. To that end, a unique research facility...

Semper, Michael Thomas

2013-05-15T23:59:59.000Z

44

Scaling Laws for the Heterogeneously Heated Free Convective Boundary Layer  

Science Journals Connector (OSTI)

The heterogeneously heated free convective boundary layer (CBL) is investigated by means of dimensional analysis and results from large-eddy simulations (LES) and direct numerical simulations (DNS). The investigated physical model is a CBL that ...

Chiel C. van Heerwaarden; Juan Pedro Mellado; Alberto De Lozar

2014-11-01T23:59:59.000Z

45

Mixing Line Analysis of Clouds and Cloudy Boundary Layers  

Science Journals Connector (OSTI)

The diagnostic study of the thermodynamic structure of nonprecipitating clouds and cloudy boundary layers is formulated using a mixing line and saturation point approach. A parametric model for the mean structure is developed as a tool for ...

Alan K. Betts

1985-12-01T23:59:59.000Z

46

Upstream influence in boundary layers 45 years ago  

Science Journals Connector (OSTI)

...0) = M2 2 ikH(k); (2.19) because M(y) takes the value M2, given by equation (2.15), at the location (here rede ned as y = 0) where the inviscid boundary condition has to be satis ed. Also, at the edge y = of the boundary layer, disturbances...

2000-01-01T23:59:59.000Z

47

A dual mass flux framework for boundary layer convection  

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

A dual mass flux framework for boundary layer convection A dual mass flux framework for boundary layer convection Neggers, Roel European Centre for Medium-range Weather Forecasts (ECMWF) Category: Modeling A new convective boundary layer scheme is presented that is currently being developed for the Integrated Forecasting System (IFS) of the European Centre for Medium-range Weather Forecasts (ECMWF). Part of the total turbulent flux is modeled through advective mass flux by multiple updrafts, initialized at the surface. Two groups of updrafts are explicitly represented; i) updrafts that never reach their lifting condensation level, and ii) updrafts that condensate and become cloudy. Key new ingredient is the flexibility of the associated updraft area fractions, as a function of model state. As a result, an extra degree of freedom is introduced in the

48

ARM - Field Campaign - Boundary Layer CO2 Using CW Lidar  

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

govCampaignsBoundary Layer CO2 Using CW Lidar govCampaignsBoundary Layer CO2 Using CW Lidar Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Boundary Layer CO2 Using CW Lidar 2005.05.21 - 2005.05.24 Lead Scientist : Michael Dobbs Description Overflights Underway at ACRF Southern Great Plains Site (M.Dobbs/J.Liljegren) Science collaborators at ITT Industries and the National Aeronautics and Space Administration (NASA) Langley Research Center (LaRC) conducted flights over the Central Facility at ACRF's Southern Great Plains (SGP) site as part of the Climate Sources and Sink (CO2) Intensive Operational Period (IOP), using a CW lidar. The objective of the flights was to validate, by demonstration and comparison with SGP ground observations, the performance of the ITT system when used in conjunction with retrieval

49

Distributed boundary layer suction utilizing wing tip effects  

E-Print Network (OSTI)

that this is not the case. The rotational force at the tip accounts for the suction power. Since this power is utilized to suck air from the boundary, energy is dissipated, thereby weakening the vortex strength. Providing this assumption is valid, the effect would... was done. TABLE OF CONTENTS Chapter Page INTRODUCTION OBJECTIVES AND SCOPE EXPERIMENTAL FACILITY AND PROCEDURES Wing Model . Wake Rake Boundary Layer Probe . . Multiple Tube Manometers Wind Tunnel and Related Equipment Procedures Computation...

Edwards, Jay Thomas

2012-06-07T23:59:59.000Z

50

Modeling the Interaction between the Atmospheric and Oceanic Boundary Layers, Including a Surface Wave Layer  

Science Journals Connector (OSTI)

The interaction between the atmospheric and oceanic boundary layers is simulated by solving a closed system of equations including equations of motion, turbulent kinetic energy (TKE), turbulent exchange coefficient (TEC), expressions for air and ...

Le Ngoc Ly

1986-08-01T23:59:59.000Z

51

Carbon transport in the bottom boundary layer. Final report  

SciTech Connect

This report summarizes the activities and findings from a field experiment devised to estimate the rates and mechanisms of transport of carbon across the continental shelves. The specific site chosen for the experiment was the mid-Atlantic Bight, a region off the North Carolina coast. The experiment involved a large contingent of scientists from many institutions. The specific component of the program was the transport of carbon in the bottom boundary layer. The postulate mechanisms of transport of carbon in the bottom boundary layer are: resuspension and advection, downward deposition, and accumulation. The high turbulence levels in the bottom boundary layer require the understanding of the coupling between turbulence and bottom sediments. The specific issues addressed in the work reported here were: (a) What is the sediment response to forcing by currents and waves? (b) What is the turbulence climate in the bottom boundary layer at this site? and (c) What is the rate at which settling leads to carbon sequestering in bottom sediments at offshore sites?

Agrawal, Y.C.

1998-10-05T23:59:59.000Z

52

Turbulence Structure and Wall Signature in Hypersonic Boundary Layer  

E-Print Network (OSTI)

Turbulence Structure and Wall Signature in Hypersonic Boundary Layer Yin-Chiu Kan , Beekman Izaak and low- speed features, found in subsonic experiments, are present in our supersonic and hypersonic and hypersonic regimes due to the lack of detailed flow field data, and the studies have been mostly restricted

MartĂ­n, Pino

53

OFFSHORE BOUNDARY-LAYER MODELLING H. Bergstrm1  

E-Print Network (OSTI)

OFFSHORE BOUNDARY-LAYER MODELLING H. Bergström1 and R. Barthelmie2 1) Uppsala Univ., Dept. of Earth) of the ENDOW (EfficieNt Development of Offshore Windfarms) project, where the objectives are to provide currently be incorporated into a wind farm design tool. The offshore thermal stratification climate is also

54

Boundary layer transition as a source of noise and vibration  

Science Journals Connector (OSTI)

When laminar flow over a rigid or flexible surface becomes unstable an intermittent flow state occurs. This intermittent flow regime called the transition region is where turbulent spots are created and then grow as they convect downstream at a velocity typically equal to 0.7 times the free?stream velocity. The spots eventually coalesce to form the beginning of the fully developed turbulent boundary layer. The statistics of the velocity or pressure fluctuations in the transition region are essentially stationary in time but nonhomogeneous in the streamwise direction. Fundamentally it has been argued that this region is capable of creating monopole sound radiation e.g. Lauchle [J. Acoust. Soc. Am. 69 665–671 (1981)] and Sornette and Lagier [Acustica 55 255–267 (1984)]. Also it has been suspected that a transitional boundary layer can induce wall vibrations. These issues have been under study for some time. We have completed a set of measurements on the. space?time statistics of turbulent spots in a naturally occurring transition zone and from them developed an analytical model for the wavenumber?frequency spectrum of the pressure fluctuations. Based on this model it appears that the transition zone wall pressure is less intense than that of a fully developed turbulent layer by a factor equal approximately to the intermittency factor. This presentation will review the current research findings on wall pressure fluctuations and radiated sound caused by boundary layer transition. [Work supported by Applied Research Laboratory under NAVSEA contract.

Gerald C. Lauchle; M. A. Josserand

1986-01-01T23:59:59.000Z

55

Characterization of wind noise by the boundary layer meteorology  

Science Journals Connector (OSTI)

The fluctuations in pressure generated by turbulent motions of the atmospheric boundary layer are a principal noise source in outdoor acoustic measurements. The mechanics of wind noise involve not only stagnation pressure fluctuations at the sensor but also shearing and self-interaction of turbulence throughout the flow particularly at low frequencies. The contributions of these mechanisms can be described by the boundary-layer meteorology. An experiment was conducted at the National Wind Institute's 200-meter meteorological tower located outside Lubbock Texas in the Llano Estacado region. For two days a 44-element 400-meter diameter array of unscreened NCPA-UMX infrasound sensors recorded wind noise continuously while the tower and a Doppler SODAR measured vertical profiles of the boundary layer. Analysis of the fluctuating pressure with the meteorological data shows that the statistical structure of wind noise depends on both mean velocity distribution and buoyant stability. The root-mean-square pressure exhibits distinct scalings for stable and unstable stratification. Normalization of the pressure power spectral density depends on the outer scales. In stable conditions the kurtosis of the wind noise increases with Reynolds number. Measures of noise intermittency are explored with respect to the meteorology.

2014-01-01T23:59:59.000Z

56

Improving Subtropical Boundary Layer Cloudiness in the 2011 NCEP GFS  

SciTech Connect

The current operational version of National Centers for Environmental Prediction (NCEP) Global Forecasting System (GFS) shows significant low cloud bias. These biases also appear in the Coupled Forecast System (CFS), which is developed from the GFS. These low cloud biases degrade seasonal and longer climate forecasts, particularly of short-wave cloud radiative forcing, and affect predicted sea surface temperature. Reducing this bias in the GFS will aid the development of future CFS versions and contributes to NCEP's goal of unified weather and climate modelling. Changes are made to the shallow convection and planetary boundary layer parameterisations to make them more consistent with current knowledge of these processes and to reduce the low cloud bias. These changes are tested in a single-column version of GFS and in global simulations with GFS coupled to a dynamical ocean model. In the single-column model, we focus on changing parameters that set the following: the strength of shallow cumulus lateral entrainment, the conversion of updraught liquid water to precipitation and grid-scale condensate, shallow cumulus cloud top, and the effect of shallow convection in stratocumulus environments. Results show that these changes improve the single-column simulations when compared to large eddy simulations, in particular through decreasing the precipitation efficiency of boundary layer clouds. These changes, combined with a few other model improvements, also reduce boundary layer cloud and albedo biases in global coupled simulations.

Fletcher, J. K.; Bretherton, Christopher S.; Xiao, Heng; Sun, Ruiyu N.; Han, J.

2014-09-23T23:59:59.000Z

57

BOUNDARY LAYER (BL) THERMAL EDDIES OVER A PINE FOREST FROM CARES 2010  

E-Print Network (OSTI)

BOUNDARY LAYER (BL) THERMAL EDDIES OVER A PINE FOREST FROM CARES 2010 Gunnar Senum and Stephen are three thermal eddies, about 250 meters wide, in the boundary layer. These thermal eddies are formed from the solar heating of the surface and help to form the boundary layer. The eddy updrafts are transporting

58

Simulation of bubble migration in a turbulent boundary layer M. Mattson and K. Mahesha  

E-Print Network (OSTI)

Simulation of bubble migration in a turbulent boundary layer M. Mattson and K. Mahesha Aerospace of bubbles injected into a turbulent boundary layer. The Reynolds number of the turbulent boundary layer varies from 420 Re 1800, and the bubble Reynolds number Reb 1. Simulation parameters were chosen to match

Mahesh, Krishnan

59

A case study of boundary layer ventilation by convection and coastal processes  

E-Print Network (OSTI)

of the pollution in the atmosphere originates from emissions in the atmospheric boundary layer, the region; published 12 September 2007. [1] It is often assumed that ventilation of the atmospheric boundary layer responsible for ventilation of the atmospheric boundary layer during a nonfrontal day that occurred on 9 May

Dacre, Helen

60

Modelling the Effect of Ocean Waves on the Atmospheric and Ocean Boundary Layers  

Science Journals Connector (OSTI)

Ocean waves, in addition to generating direct forces on fixed and floating offshore wind generator structures, also have significant indirect effects via their influence on the atmospheric and oceanic boundary layers above and below the water surface. In the atmospheric boundary layer the waves act as roughness elements, influencing the turbulent flow and the vertical wind speed profile, and induce oscillatory motions in the airflow. Spray droplets from breaking wave crests enhance structure corrosion, and may lead to icing under low-temperature conditions. Below the water surface, the air-sea momentum flux and mechanical energy flux, mediated by the waves and wave-generated turbulence, affect the vertical profiles of ocean current, temperature, and salinity. Effects include modifying the structural forces and dynamics, and the movement and dispersion of marine organisms, pollutants, and air bubbles generated by breaking waves, with consequences for fouling, corrosion, and environmental impact. Measurement of relevant airflow and ocean dynamical variables is also challenging, as near the water surface it is often necessary to use instruments mounted on moving measurement platforms. Modelling such boundary-layer effects is a complex task, as a result of feedbacks between the airflow, wave field, current field, and turbulence in the atmosphere and the ocean. We present results from a coupled model study of the North Sea and Norwegian Sea area. We employ a mesoscale atmosphere model (WRF) and a spectral wave model (WAM), running simultaneously and coupled using the open-source coupler MCEL which can interpolate between different model grids and time steps. To investigate the ocean boundary layer, one-dimensional model experiments were performed for an idealized Ekman layer and for locations in the North Sea, Atlantic Ocean, and the northern Pacific, using a version of the GOTM turbulence model, modified to take wave dynamics into account. Results show how the wave field alters the ocean's aerodynamic roughness and the air–sea momentum flux, depending on the relation between the surface wind speed and the propagation speed of the wave crests (the wave age). These effects will feed back into the airflow, wind speed and turbulence profile in the boundary layer. The ocean dynamics experiments showed results which compare favourably with field observations from the LOTUS3 and PROVESS experiments in the north Atlantic and North Sea, and Ocean Weather Station Papa in the Pacific Ocean.

Alastair D. Jenkins; Mostafa Bakhoday Paskyabi; Ilker Fer; Alok Gupta; Muralidhar Adakudlu

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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.


61

Transition in Hypersonic Boundary Layers: Role of Dilatational Waves  

E-Print Network (OSTI)

Transition and turbulence production in a hypersonic boundary layer is investigated in a Mach 6 quiet wind tunnel using Rayleigh-scattering visualization, fast-response pressure measurements, and particle image velocimetry. It is found that the second instability acoustic mode is the key modulator of the transition process. The second mode experiences a rapid growth and a very fast annihilation due to the effect of bulk viscosity. The second mode interacts strongly with the first vorticity mode to directly promote a fast growth of the latter and leads to immediate transition to turbulence.

Zhu, Yiding; Yuan, Huijing; Wu, Jiezhi; Chen, Shiyi; Lee, Cunbiao; Gad-el-Hak, Mohamed

2015-01-01T23:59:59.000Z

62

EART 265 Lecture Notes: Boundary Layers We're interested here mainly in boundary layers relevant to planets, i.e. those of planetary atmo-  

E-Print Network (OSTI)

of the bounding surface. Note that the vertical shear caused by the surface generates turbulence, whichEART 265 Lecture Notes: Boundary Layers We're interested here mainly in boundary layers relevant and the surface, thus mediating all interactions between the two. If we look back at the Navier-Stokes equations

Nimmo, Francis

63

Predictive Inner-Outer Model for Turbulent Boundary Layers Applied to Hypersonic DNS Data  

E-Print Network (OSTI)

Predictive Inner-Outer Model for Turbulent Boundary Layers Applied to Hypersonic DNS Data Clara numerical simulation (DNS) data of supersonic and hypersonic turbulent boundaries with Mach 3 and Mach 7, and Martin12­14 on DNS of hypersonic turbulent boundary layers demonstrates the existence of large scale

MartĂ­n, Pino

64

Heat transport by laminar boundary layer flow with polymers  

E-Print Network (OSTI)

Motivated by recent experimental observations, we consider a steady-state Prandtl-Blasius boundary layer flow with polymers above a slightly heated horizontal plate and study how the heat transport might be affected by the polymers. We discuss how a set of equations can be derived for the problem and how these equations can be solved numerically by an iterative scheme. By carrying out such a scheme, we find that the effect of the polymers is equivalent to producing a space-dependent effective viscosity that first increases from the zero-shear value at the plate then decreases rapidly back to the zero-shear value far from the plate. We further show that such an effective viscosity leads to an enhancement in the drag, which in turn leads to a reduction in heat transport.

Roberto Benzi; Emily S. C. Ching.; Vivien W. S. Chu

2011-04-23T23:59:59.000Z

65

Friction of a slider on a granular layer: Nonmonotonic thickness dependence and effect of boundary conditions  

E-Print Network (OSTI)

Friction of a slider on a granular layer: Nonmonotonic thickness dependence and effect of boundary the effective friction encountered by a mass sliding on a granular layer as a function of bed thickness and boundary roughness conditions. The observed friction has minima for a small number of layers before

Kudrolli, Arshad

66

Estimation of boundary layer transition noise from velocity measurements  

Science Journals Connector (OSTI)

Velocity measurements of artificially generatedflow structures in the transition region of an incompressible boundary layer with zero pressure gradient are described. These measurements made in a laminar flow water channel allow calculation of the velocity normal to the wall in a turbulent spot. This velocity specifies the linearized boundary condition for the acoustic equation at the wall. The approach relates the radiated noise to fluctuations in the normal velocity at the plate through fluctuations in the displacement thickness. Although this approach has been previously proposed [H. W. Liepmann unpublished (1954) J. Laufer J. E. Ffowcs?Williams and S. Childress AGARDograph 90 39–42 (1964) G. C. Lauchle J. Acoust. Soc. Am. 69 665–671 (1981) G. C. Lauchle ASME NCA 5 31–38 (1989)] it has never been applied. The results of these experiments will be compared to concurrent experiments run in an anechoic wind tunnel. Ultimately this work will be extended to naturally occurring structures in the transition region. [Work supported by ONR under Grant ?N00014?90?J?1365.

Michael H. Krane; Wayne R. Pauley

1991-01-01T23:59:59.000Z

67

A first order geometric auto regressive process for boundary layer wind speed simulation  

Science Journals Connector (OSTI)

Under certain conditions the first order geometric auto regressive (AR) process has statistical properties similar to atmospheric boundary layer wind speed. In this contribution, we investigate ... this stochas...

T. Laubrich; H. Kantz

2009-08-01T23:59:59.000Z

68

About First Order Geometric Auto Regressive Processes for Boundary Layer Wind Speed Simulation  

Science Journals Connector (OSTI)

Under certain conditions the first order geometric auto regressive process has statistical properties similar to atmospheric boundary layer wind speed. In this contribution, we investigate ... this stochastic pro...

Thomas Laubrich; Holger Kantz

2010-01-01T23:59:59.000Z

69

Wind-Tunnel Simulation of the Wake of a Large Wind Turbine in a Stable Boundary Layer. Part 1: The Boundary-Layer Simulation  

Science Journals Connector (OSTI)

Measurements have been made in both a neutral and a stable boundary layer as part of an investigation of the wakes of wind turbines in an offshore environment, in the EnFlo stratified flow wind tunnel. The wor...

Philip E. Hancock; Frauke Pascheke

2014-04-01T23:59:59.000Z

70

Similarity Equations for Wind and Temperature Profiles in the Radix Layer, at the Bottom of the Convective Boundary Layer  

Science Journals Connector (OSTI)

In the middle of the convective boundary layer, also known as the mixed layer, is a relatively thick region where wind speed and potential temperature are nearly uniform with height. Below this uniform layer (UL), wind speed decreases to zero at ...

Edi Santoso; Roland Stull

2001-06-01T23:59:59.000Z

71

Simulation of Hypersonic Shock Wave/Boundary Layer Interaction Using High Order WENO Scheme  

E-Print Network (OSTI)

Simulation of Hypersonic Shock Wave/Boundary Layer Interaction Using High Order WENO Scheme Yiqing for predicting hypersonic shock wave/boundary layer interaction. The implicit time marching method number of 1.09 Ă? 105 /ft. 1 Introduction Hypersonic aerothermodynamics is one of the most challenging

Zha, Gecheng

72

Study of Emission TurbulenceRadiation Interaction in Hypersonic Boundary Layers  

E-Print Network (OSTI)

Study of Emission Turbulence­Radiation Interaction in Hypersonic Boundary Layers L. Duan and M. P of emission turbulence­radiation interaction in hypersonic turbulent boundary layers, representative interaction between turbulence and emission at the hypersonic environment under investigation. An explanation

MartĂ­n, Pino

73

Assessment of TurbulenceChemistry Interaction in Hypersonic Turbulent Boundary Layers  

E-Print Network (OSTI)

Assessment of Turbulence­Chemistry Interaction in Hypersonic Turbulent Boundary Layers L. Duan of the turbulence­chemistry interaction are performed in hypersonic turbulent boundary layers using direct numerical simulation flowfields under typical hypersonic conditions representative of blunt-body and slender- body

MartĂ­n, Pino

74

Study of turbulence-chemistry interaction in hypersonic turbulent boundary layers  

E-Print Network (OSTI)

Study of turbulence-chemistry interaction in hypersonic turbulent boundary layers Lian Duan and M of the turbulence-chemistry interaction (TCI) are performed in hypersonic tur- bulent boundary layers using direct numerical simulation (DNS) flow fields under typical hypersonic conditions representative of blunt

MartĂ­n, Pino

75

Direct injection of ionospheric O sup + into the dayside low latitude boundary layer  

SciTech Connect

Observations from the AMPTE/Charge Composition Explorer (AMPTE/CCE) indicate the presence of two distinct O{sup +} populations in the dayside subsolar low latitude boundary layer during some periods of northward Interplanetary Magnetic Field (IMF). The first population is O{sup +} convected into the boundary layer from the outer magnetosphere and has been reported previously. It is suggested here that the new, second, O{sup +} population is injected into the dayside boundary layer directly from the high latitude ionosphere. This second population can have a significant density and distinct characteristics such as field-aligned flow relative to boundary layer H{sup +} that modify both the plasma composition and dynamics in the low latitude boundary layer. {copyright} American Geophysical Union 1989

Fuselier, S.A.; Klumpar, D.M.; Peterson, W.K.; Shelley, E.G. (Lockheed Palo Alto Research Laboratory, Palo Alto, California (US))

1989-10-01T23:59:59.000Z

76

Boundary Layer Dynamics and Cross-Equatorial Hadley Circulation  

Science Journals Connector (OSTI)

The behavior of the Hadley circulation is analyzed in the context of an idealized axisymmetric atmosphere. It is argued that the cross-equatorial Hadley circulation exhibits two different regimes depending on the depth of the planetary boundary ...

Olivier Pauluis

2004-05-01T23:59:59.000Z

77

Observations of turbulent fluxes and turbulence dynamics in the ocean surface boundary layer  

E-Print Network (OSTI)

This study presents observations of turbulence dynamics made during the low winds portion of the Coupled Boundary Layers and Air-Sea Transfer experiment (CBLAST-Low). Observations were made of turbulent fluxes, turbulent ...

Gerbi, Gregory Peter

2008-01-01T23:59:59.000Z

78

Properties of a Simulated Convective Boundary Layer in an Idealized Supercell Thunderstorm Environment  

Science Journals Connector (OSTI)

Nearly all previous numerical simulations of supercell thunderstorms have neglected surface fluxes of heat, moisture, and momentum. This choice precludes horizontal inhomogeneities associated with dry boundary layer convection in the near-storm ...

Christopher J. Nowotarski; Paul M. Markowski; Yvette P. Richardson; George H. Bryan

2014-11-01T23:59:59.000Z

79

Wind Direction Dependence of Atmospheric Boundary Layer Turbulence Parameters in the Urban Roughness Sublayer  

Science Journals Connector (OSTI)

A variety of atmospheric boundary layer parameters are examined as a function of wind direction in both urban and suburban settings in Oklahoma City, Oklahoma, derived from measurements during the Joint Urban 2003 field campaign. Heterogeneous ...

Cheryl Klipp

2007-12-01T23:59:59.000Z

80

Observations of Turbulence in the Ocean Surface Boundary Layer: Energetics and Transport  

E-Print Network (OSTI)

Observations of turbulent kinetic energy (TKE) dynamics in the ocean surface boundary layer are presented here and compared with results from previous observational, numerical, and analytic studies. As in previous studies, ...

Gerbi, Gregory P.

Note: This page contains sample records for the topic "marine boundary layer" 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

The surface roughness effects in computation of the turbulent boundary layer on slender ship-hull  

Science Journals Connector (OSTI)

An improved version of an integral method for computing turbulent boundary layers on a slender ship-hull with auxiliary shape parameter and lag- ... modifying an approximate technique of scaling model-to-ship rou...

Si-Young Kim; A. K. Lewkowicz

1991-09-01T23:59:59.000Z

82

Magnetic reconnection structures in the boundary layer of an interplanetary magnetic cloud  

Science Journals Connector (OSTI)

An interplanetary magnetic diffusion region was detected by WIND during 0735-0850 UT on May 15, 1997 when the front boundary layer of a magnetic cloud passed through the spacecraft about 190 earth radii upstre...

Fengsi Wei; Rui Liu; Xueshang Feng…

2004-01-01T23:59:59.000Z

83

Near-surface wind estimates using statistics from a planetary boundary-layer model  

Science Journals Connector (OSTI)

This paper shows the possibilities of a procedure for estimating near-surface wind statistics, by means of the numerical integration of a simple boundary-layer model with a second-order turbulent closure. Stan...

J. C. Labraga

1988-04-01T23:59:59.000Z

84

An experimental study of the airflow over a hill in the atmospheric boundary layer  

Science Journals Connector (OSTI)

Between 1975 and 1977, the Centre Scientifique et Technique du Bâtiment (CSTB) carried out a study of the overspeed effect over a hill in the surface boundary layer. The hill in question was situated in open c...

C. Sacré

1979-11-01T23:59:59.000Z

85

Nonlinear equilibration of baroclinic eddies : the role of boundary layer processes and seasonal forcing  

E-Print Network (OSTI)

In this thesis, the influence of boundary layer processes and seasonal forcing on baroclinic eddy equilibration is studied to understand how the baroclinic adjustment is modified when taking into account these two factors. ...

Zhang, Yang, Ph. D. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

86

Stability Analysis for a Saline Boundary Layer Formed by Uniform Up ow Using Finite Elements  

E-Print Network (OSTI)

density in the deeper underground and high salt water density at the boundary layer), gravitation plays and Darcy's law. In this report we #12;rst give an overview of semi-analytical methods to analyse

Eindhoven, Technische Universiteit

87

A Case Study of Mid-Atlantic Nocturnal Boundary Layer Events during WAVES 2006  

Science Journals Connector (OSTI)

The Water Vapor Variability-Satellite/Sondes (WAVES) 2006 field campaign provided a contiguous 5-day period of concentrated high-resolution measurements to examine finescale boundary layer phenomena under the influence of a summertime subtropical ...

S. Rabenhorst; D. N. Whiteman; D.-L. Zhang; B. Demoz

2014-11-01T23:59:59.000Z

88

Numerical Modeling of the Propagation Environment in the Atmospheric Boundary Layer over the Persian Gulf  

Science Journals Connector (OSTI)

Strong vertical gradients at the top of the atmospheric boundary layer affect the propagation of electromagnetic waves and can produce radar ducts. A three-dimensional, time-dependent, nonhydrostatic numerical model was used to simulate the ...

B. W. Atkinson; J-G. Li; R. S. Plant

2001-03-01T23:59:59.000Z

89

Advances in the visualization and analysis of boundary layer flow in swimming fish  

E-Print Network (OSTI)

In biology, the importance of fluid drag, diffusion, and heat transfer both internally and externally, suggest the boundary layer as an important subject of investigation, however, the complexities of biological systems ...

Anderson, Erik J

2005-01-01T23:59:59.000Z

90

Uncertainty in Contaminant Concentration Fields Resulting from Atmospheric Boundary Layer Depth Uncertainty  

Science Journals Connector (OSTI)

The relationship between atmospheric boundary layer (ABL) depth uncertainty and uncertainty in atmospheric transport and dispersion (ATD) simulations is investigated by examining profiles of predicted concentrations of a contaminant. Because ...

Brian P. Reen; Kerrie J. Schmehl; George S. Young; Jared A. Lee; Sue Ellen Haupt; David R. Stauffer

2014-11-01T23:59:59.000Z

91

Lidar-Observed Stress Vectors and Veer in the Atmospheric Boundary Layer  

Science Journals Connector (OSTI)

This study demonstrates that a pulsed wind lidar is a reliable instrument for measuring angles between horizontal vectors of significance in the atmospheric boundary layer. Three different angles are considered: the wind turning, the angle between ...

Jacob Berg; Jakob Mann; Edward G. Patton

2013-09-01T23:59:59.000Z

92

On the magnetospheric boundary layer and solar wind energy transfer into the magnetosphere  

Science Journals Connector (OSTI)

The magnetopause and the magnetospheric boundary layer constitute the interface between the shocked solar wind plasma and the terrestrial magnetic cavity populated by a predominantly hot plasma in the outer po...

Rickard Lundin

1988-01-01T23:59:59.000Z

93

Large-Scale Streamwise Turbulent Structures in Hypersonic Boundary Layers  

E-Print Network (OSTI)

Marine Corps for allowing me the time off during my career and necessary financial support to complete this endeavor. The help and guidance provided by Scott Peltier and Dr. Ray Humble have been indispensable in the completion of this work. Scott... helped greatly in the initial setup and design of this experiment. He has also been completely open in sharing his data and findings to help complete and emphasize my own. Dr. Humble was a source of inspiration and both conceptual and technical...

English, Benjamin L.

2013-04-22T23:59:59.000Z

94

Influence of surface heating on the boundary layer stability of flows with favorable pressure gradients  

E-Print Network (OSTI)

INFLUENCE OF SURFACE HEATING ON THE BOUNDARY LAYER STABILITY OF FLOWS WITH FAVORABI E PRESSURE GRADIENTS A Thesis by DAVID BRIAN LANDRUM Submitted to the Graduate College of Texas AAM University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE August 1986 Major Subject: Aerospace Engineering INFLUENCE OF SURFACE HEATING ON THE BOUNDARY LAYER STABILITY OF FLOWS WITH FAVORABLE PRESSURE GRADIENTS A Thesis by DAVID BRIAN LANDRUM Approved as to style and content...

Landrum, David Brian

2012-06-07T23:59:59.000Z

95

Effect of a surface boundary layer on an intensifying, downward-propagating vortex  

E-Print Network (OSTI)

EFFECT OF A SURFACE BOUNDARY LAYER ON AN INTENSIFYING, DOWNWARD-PROPAGATING VORTEX A Thesis by VINCENT TUNSTALL WOOD Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1977 Major Subject: Meteorology EFFECT OF A SURFACE BOUNDARY LAYER ON AN INTENSIFYING, DOWNWARD-PROPAGATING VORTEX A Thesis by VINCENT TUNSTALL WOOD Approved as to style and content by: (Chairman of Committee) (Head of Department...

Wood, Vincent Tunstall

2012-06-07T23:59:59.000Z

96

The development of a low velocity wind tunnel with instrumentation for boundary layer investigations  

E-Print Network (OSTI)

THE DEVELOPMENT OF A LOW VELOCITY WIND TUNNEL WITH INSTRUMENTATION FOR BOUNDARY LAYER INVESTIGATIONS A Dissertation B y John Robert Massey Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial... fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY May 1958 Major Subject: Mechanical Engineering THE DEVELOPMENT OF A LOW VELOCITY WIND TUNNEL WITH INSTRUMENTATION FOR BOUNDARY LAYER INVESTIGATIONS A Dissertation By John Robert...

Massey, John Robert

2013-10-04T23:59:59.000Z

97

Tide-Induced Sediment Resuspension and the Bottom Boundary Layer in an Idealized Estuary with a Muddy Bed  

Science Journals Connector (OSTI)

Sediment transport and bottom boundary layer (BBL) in an idealized estuary with a muddy bed were studied by numerical simulations. The focus was placed on description and prediction of the dynamics of nepheloid layer (a fluid–mud layer) developed ...

X. H. Wang

2002-11-01T23:59:59.000Z

98

THE HORIZONTAL BOUNDARY-LAYER STRUCTURE FOR THE CONVECTIVE REGIME IN A LATERALLY HEATED VERTICAL SLOT  

Science Journals Connector (OSTI)

......for the case when the horizontal walls of the slot are...and a main two-tier horizontal boundary layer is identified...closed form for the outer horizontal layer which is dominated...reactor cooling systems, solar collectors and cavity insulation......

P. G. DANIELS

1987-05-01T23:59:59.000Z

99

Role of Amorphous Boundary Layer in Enhancing Ionic Conductivity of Lithium–lanthanum–titanate Electrolyte  

SciTech Connect

The low ionic conductivity is a bottleneck of the inorganic solid state electrolyte used for lithium ion battery. In ceramic electrolytes, grain boundary usually dominates the total conductivity. In order to improve the grain boundary effect, an amorphous silica layer is introduced into grain boundary of ceramic electrolytes based on lithium-lanthanum-titanate, as evidenced by electron microscopy. The results showed that the total ionic conductivity could be to be enhanced over 1 x 10{sup -4} S/cm at room temperature. The reasons can be attributed to removing the anisotropy of outer-shell of grains, supplement of lithium ions in various sites in grain boundary and close bindings among grains by the amorphous boundary layer among grains.

Mei, A.; Wang, X.; Lana, J.-L.; Fenga, Y.-C.; Genga, H.-X.; Lina, Y.-H.; Nana, C.-W.

2010-03-01T23:59:59.000Z

100

Characterization of particle cloud droplet activity and composition in the free troposphere and the boundary layer during INTEX-B  

SciTech Connect

Measurements of cloud condensation nuclei (CCN), aerosol size distributions, and submicron aerosol composition were made as part of the Intercontinental Chemical Transport Experiment Phase B (INTEX-B) campaign during spring 2006. Measurements were conducted from an aircraft platform over the northeastern Pacific and western North America with a focus on how the transport and evolution of Asian pollution across the Pacific Ocean affected CCN properties. A broad range of air masses were sampled and here we focus on three distinct air mass types defined geographically: the Pacific free troposphere (FT), the marine boundary layer (MBL), and the polluted continental boundary layer in the California Central Valley (CCV). These observations add to the few observations of CCN in the FT. CCN concentrations showed a large range of concentrations between air masses, however CCN activity was similar for the MBL and CCV ({kappa} {approx} 0.2-0.25). FT air masses showed evidence of long-range transport from Asia and CCN activity was consistently higher than for the boundary layer air masses. Bulk chemical measurements predicted CCN activity reasonably well for the CCV and FT air masses. Decreasing trends in {kappa} with organic mass fraction were observed for the combination of the FT and CCV air masses and can be explained by the measured soluble inorganic chemical components. Changes in hygroscopicity associated with differences in the non-refractory organic composition were too small to be distinguished from the simultaneous changes in inorganic ion composition in the FT and MBL, although measurements for the large organic fractions (0.6-0.8) found in the CCV showed values of the organic fraction hygroscopicity consistent with other polluted regions ({kappa}{sub org} {approx} 0.1-0.2). A comparison of CCN-derived {kappa} (for particles at the critical diameter) to H-TDMA-derived {kappa} (for particles at 100 nm diameter) showed similar trends, however the CCN-derived {kappa} values were significantly higher.

Roberts, G. C.; Day, D. A.; Russell, Lynn M.; Dunlea, E. J.; Jimenez, J. L.; Tomlinson, Jason M.; Collins, Donald R.; Shinozuka, Y.; Clarke, A. D.

2010-07-20T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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

Thermal boundary layer effects in an annular acoustic Stirling engine  

Science Journals Connector (OSTI)

A stability and transport analysis is performed for a simplified model of a strongly coupled thermoacoustic prime mover stack in an annular resonator. The result demonstrates that even in the limit that other flow impedances of the resonator and stack can be ignored there is a thermal impedance mismatch created in the boundary region at the ends of the stack. This can cause the gain predicted for the wave traversing the interior of the stack to differ significantly from the gain that drives sound in the resonator. The analysis is used to derive scaling relations between the heat and mass transport around the annulus and to show how different scaling regimes relate to the maximum sound intensity that the stack can induce in the absence of other losses.

Eric Smith

1996-01-01T23:59:59.000Z

102

Application of acoustic sounding to estimating fusion in an atmospheric boundary layer  

Science Journals Connector (OSTI)

An acoustic sounder system can be configured to provide estimates of the vertical profile of velocity and dissipation rate of kinetic and potential energy. A method based on the concepts of boundary?layer similarity theory is outlined by which the characteristicvelocity in a freely convective boundary layer is deduced from the inversion height and the asymptotic value of the dissipation rate of kinetic energy near the inversion. These values in conjunction with the mean velocity are used to establish the normalized heights downwind and cross?wind distances and cross?wind integrated concentrations. The normalized lateral and vertical standard deviations are then deduced from empirically established laboratory relationships for nonbuoyant particulates. Preliminary analysis indicate a similar methodology may be applicable to the stable boundary layer.

Bryan R. Kerman

1976-01-01T23:59:59.000Z

103

Comparison of two-equation turbulence models for boundary layers with pressure gradient  

SciTech Connect

This paper compares the performance of eight low Reynolds number k-epsilon and k-omega models for high Reynolds number, incompressible turbulent boundary layers with favorable, zero, and adverse pressure gradients. Results obtained underscore the k-epsilon model's unsuitability for such flows. Even more seriously, the k-epsilon model is demonstrated to be inconsistent with the well-established physical structure of the turbulent boundary layer, and low Reynolds number corrections cannot remove the inconsistency. By contrast, the k-omega model, with and without low Reynolds number modifications, proves to be very accurate for all of the tests conducted. 16 refs.

Wilcox, D.C. (DCW Industries, Inc., La Canada, CA (United States))

1993-08-01T23:59:59.000Z

104

The effect of periodic unsteady wakes on boundary layer transition and heat transfer on a curved plate.  

E-Print Network (OSTI)

??The effect of unsteady periodic wakes on heat transfer and boundary layer transition was investigated on a constant curvature heat transfer curved plate in a… (more)

Wright, Lance Cole

2012-01-01T23:59:59.000Z

105

Effects of passive porous walls on the first Mack mode instability of hypersonic boundary layers over a sharp cone.  

E-Print Network (OSTI)

??Passive porous coatings have been proposed in literature as a means of delaying transition to turbulence in hypersonic boundary layers. The nonlinear stability of hypersonic… (more)

Michael, Vipin George

2013-01-01T23:59:59.000Z

106

Marine gas hydrates in thin sand layers that soak up microbial methane  

Science Journals Connector (OSTI)

At Site U1325 (IODP Exp. 311, Cascadia margin), gas hydrates occupy 20–60% of pore space in thin sand layers (hydrate. This is a common occurrence in gas hydrate-bearing marine sequences, and it has been related to the inhibition of hydrate formation in the small pores of fine-grained sediments. This paper applies a mass balance model to gas hydrate formation in a stack of alternating fine- and coarse-grained sediment layers. The only source of methane considered is in situ microbial conversion of a small amount of organic carbon (gas hydrates in the fine-grained layers. Methane generated in these layers is transported by diffusion into the coarse-grained layers where it forms concentrated gas hydrate deposits. The vertical distribution and amount of gas hydrate observed at Site U1325 can be explained by in situ microbial methane generation, and a deep methane source is not necessary.

Alberto Malinverno

2010-01-01T23:59:59.000Z

107

On the Representation of High-Latitude Boundary Layer Mixed-Phase Cloud in the ECMWF Global Model  

Science Journals Connector (OSTI)

Supercooled liquid water (SLW) layers in boundary layer clouds are abundantly observed in the atmosphere at high latitudes, but remain a challenge to represent in numerical weather prediction (NWP) and climate models. Unresolved processes such as ...

Richard M. Forbes; Maike Ahlgrimm

2014-09-01T23:59:59.000Z

108

BOUNDARY LAYER ASSOCIATED WITH THE DARCY-BRINKMAN-BOUSSINESQ MODEL FOR  

E-Print Network (OSTI)

BOUNDARY LAYER ASSOCIATED WITH THE DARCY-BRINKMAN-BOUSSINESQ MODEL FOR CONVECTION IN POROUS MEDIA of the infinite Darcy- Prandtl number Darcy-Brinkman-Boussinesq system for convection in porous media at small number Darcy-Brinkman-Boussinesq system, infinite Darcy-Prandtl number Darcy-Boussinesq sys- tem

Wang, Xiaoming

109

Acoustic boundary layer and acoustic radiation from a ribbed flat plate  

Science Journals Connector (OSTI)

The acoustic boundary?layer theory(patterned after the viscous boundary?layer theory) is derived by noting that for low frequencies where the structural wavelength is much less than the fluid acoustic wavelength there is a region about the vibrating structure which behaves as if the fluid was incompressible. The dimension of this region depends upon the particular conditions of the problem. In a paper presented by the author [J. Acoust. Soc. Am. 62 S32(A) (1977)] the theory behind the acoustic boundary layer was developed and applied to simple unit problems. In this paper the near and the far field of a force driven plate is obtained by the use of the acoustic boundary?layer theory. Two different problems are addressed. In the first instance the structure is assumed to be homogeneous while in the second problem presented a rib is attached to the flat plate. In both instances the fully coupled fluid structure problem is solved and comparisons between the exact classical approach and the proposed theory are discussed.

Mauro Pierucci

1978-01-01T23:59:59.000Z

110

Transport and Resuspension of Fine Particles in a Tidal Boundary Layer near a Small Peninsula  

Science Journals Connector (OSTI)

The authors present a theory on the transport and resuspension of fine particles in a tidal boundary layer when the ambient tidal flow is nonuniform due to a peninsula along the coastline. As a first step toward better physical understanding the ...

Chiang C. Mei; Chimin Chian; Feng Ye

1998-11-01T23:59:59.000Z

111

Device for measuring the boundary layer parameters in a high-temperature gas stream  

SciTech Connect

The authors describe a device enabling one to simultaneously measure the distributions of electrical conductivity and electron density of the working substance of an MHD generator. The structure and a block diagram of the device are shown. The measured results give information on the thermal boundary layer thickness, and temperature profiles are calculated.

Kosov, V.F.; Molotkov, V.I.; Nefedov, A.P.

1985-05-01T23:59:59.000Z

112

The Impact of Horizontal Model Grid Resolution on the Boundary Layer Structure over an Idealized Valley  

Science Journals Connector (OSTI)

The role of horizontal model grid resolution on the development of the daytime boundary layer over mountainous terrain is studied. A simple idealized valley topography with a cross-valley width of 20 km, a valley depth of 1.5 km, and a constant ...

Johannes S. Wagner; Alexander Gohm; Mathias W. Rotach

2014-09-01T23:59:59.000Z

113

Acoustic Properties of Porous Coatings for Hypersonic Boundary-Layer Control  

E-Print Network (OSTI)

Acoustic Properties of Porous Coatings for Hypersonic Boundary-Layer Control Guillaume A. Brès for hypersonic laminar flow control. The reflection coefficient, characterizing the ratio of the reflected wave of incidence, for coatings of different porosities, at various acoustic Reynolds numbers relevant to hypersonic

Dabiri, John O.

114

Effect of Finite-rate Chemical Reactions on Turbulence in Hypersonic Turbulent Boundary Layers  

E-Print Network (OSTI)

Effect of Finite-rate Chemical Reactions on Turbulence in Hypersonic Turbulent Boundary Layers Lian on future air-breathing hypersonic cruise vehicles will be turbulent and chemically reacting. To aid the design of such vehicles, a greater understanding of turbulent hypersonic flows is needed. Although

MartĂ­n, Pino

115

Direct Numerical Simulation of a Hypersonic Turbulent Boundary Layer on a Large Domain  

E-Print Network (OSTI)

Direct Numerical Simulation of a Hypersonic Turbulent Boundary Layer on a Large Domain Stephan Priebe , M. Pino Mart´in The direct numerical simulation (DNS) of a spatially-developing hypersonic There are few studies of hypersonic flows at Mach number greater than 5 and few involve the measurement of mean

MartĂ­n, Pino

116

EUROPEAN CONFERENCE FOR AEROSPACE SCIENCES Shock Wave / Boundary Layer Interactions in Hypersonic  

E-Print Network (OSTI)

and a combina- tion of laminar and turbulent (transitional) computations as well as preliminary 3D simulations the impact on the shock / boundary layer interaction and on the size of the shock induced separation. Laminar have been conducted and show the experimental shock-tunnel results to be influenced by transition and 3

117

Performance of an Eddy Diffusivity–Mass Flux Scheme for Shallow Cumulus Boundary Layers  

Science Journals Connector (OSTI)

Comparisons between single-column (SCM) simulations with the total energy–mass flux boundary layer scheme (TEMF) and large-eddy simulations (LES) are shown for four cases from the Gulf of Mexico Atmospheric Composition and Climate Study (GoMACCS) ...

Wayne M. Angevine; Hongli Jiang; Thorsten Mauritsen

2010-07-01T23:59:59.000Z

118

Lidar Investigation of Tropical Nocturnal Boundary Layer Aerosols and Cloud Macrophysics  

SciTech Connect

Observational evidence of two-way association between nocturnal boundary layer aerosols and cloud macrophysical properties under different meteorological conditions is reported in this paper. The study has been conducted during 2008-09 employing a high space-time resolution polarimetric micro-pulse lidar over a tropical urban station in India. Firstly, the study highlights the crucial role of boundary layer aerosols and background meteorology on the formation and structure of low-level stratiform clouds in the backdrop of different atmospheric stability conditions. Turbulent mixing induced by the wind shear at the station, which is associated with a complex terrain, is found to play a pivotal role in the formation and structural evolution of nocturnal boundary layer clouds. Secondly, it is shown that the trapping of energy in the form of outgoing terrestrial radiation by the overlying low-level clouds can enhance the aerosol mixing height associated with the nocturnal boundary layer. To substantiate this, the long-wave heating associated with cloud capping has been quantitatively estimated in an indirect way by employing an Advanced Research Weather Research and Forecasting (WRF-ARW) model version 2.2 developed by National Center for Atmospheric Research (NCAR), Colorado, USA, and supplementary data sets; and differentiated against other heating mechanisms. The present investigation as well establishes the potential of lidar remote-sensing technique in exploring some of the intriguing aspects of the cloud-environment relationship.

Manoj, M. G.; Devara, PC S.; Taraphdar, Sourav

2013-10-01T23:59:59.000Z

119

The Minimum Wind Speed for Sustainable Turbulence in the Nocturnal Boundary Layer  

Science Journals Connector (OSTI)

The collapse of turbulence in the nocturnal boundary layer is studied by means of a simple bulk model that describes the basic physical interactions in the surface energy balance. It is shown that for a given mechanical forcing, the amount of ...

B. J. H. Van de Wiel; A. F. Moene; H. J. J. Jonker; P. Baas; S. Basu; J. M. M. Donda; J. Sun; A. A. M. Holtslag

2012-11-01T23:59:59.000Z

120

Modeling the Atmospheric Boundary Layer Wind Response to Mesoscale Sea Surface Temperature  

E-Print Network (OSTI)

(WRF) and COAMPS atmospheric models. The SST-induced wind response is assessed from eight simulations of the surface wind relative to the SST gradient. #12;3 1. Introduction Positive correlations of local surfaceModeling the Atmospheric Boundary Layer Wind Response to Mesoscale Sea Surface Temperature Natalie

Kurapov, Alexander

Note: This page contains sample records for the topic "marine boundary layer" 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

Shock-like structures in the tropical cyclone boundary layer Gabriel J. Williams,1  

E-Print Network (OSTI)

the horizontal and vertical velocity data shown by the blue curves in Figure 1. The extreme horizontal wind m in the northeast sector. Since these extreme structures in the boundary layer wind field occur produces a shock-like structure in the radial wind, i.e., near the radius of maximum tangential wind

Schubert, Wayne H.

122

Posters Triggering of Boundary Layer Cumulus Clouds Over a Heterogeneous Surface  

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

5 5 Posters Triggering of Boundary Layer Cumulus Clouds Over a Heterogeneous Surface K. Schrieber, R. Stull, and Q. Zhang Boundary Layer Research Team Department of Atmospheric and Oceanic Science University of Wisconsin Madison, Wisconsin Complex multimodal joint frequency distributions of LCL height versus θ v in surface-layer air over a large heteroge- neous surface area are modeled as the superposition of simpler mono-modal distributions. These simpler distri- butions, which apply to quasi-homogeneous subdomains, are approximated with bivariate distribution models. The shape of each of these modeled distributions depends on variations of the Bowen ratio and heat input forcings. These forcings are a function of the landscape, insolation, surface albedo, cloud-shading, soil moisture, and other

123

Computation of hypersonic shock boundary layer interaction on a double wedge using a differential Reynolds Stress Model  

E-Print Network (OSTI)

Computation of hypersonic shock boundary layer interaction on a double wedge using a differential The simulation of hypersonic flows presents some difficulties due to the interaction between boundary layers on the standard test case of a subsonic flat plate and on a hypersonic configuration. The results show a good

124

Resuspension of Small Particles from Multilayer Deposits in Turbulent Boundary Layers  

E-Print Network (OSTI)

We present a hybrid stochastic model for the resuspension of micron-size particles from multilayer deposits in a fully-developed turbulent boundary layer. The rate of removal of particles from any given layer depends upon the rate of removal of particles from the layer above which acts as a source of uncovering and exposure of particles to the resuspending flow. The primary resuspension rate constant for an individual particle within a layer is based on the Rock'n'Roll (R'n'R) model using non-Gaussian statistics for the aerodynamic forces acting on the particles (Zhang et al., 2012). The coupled layer equations that describe multilayer resuspension of all the particles in each layer are based on the generic lattice model of Friess & Yadigaroglu (2001) which is extended here to include the influence of layer coverage and particle size distribution. We consider the influence of layer thickness on the resuspension along with the spread of adhesion within layers, and the statistics of non-Gaussian versus Gaussian removal forces including their timescale. Unlike its weak influence on long-term resuspension rates for monolayers, this timescale plays a crucial and influential role in multilayer resuspension. Finally we compare model predictions with those of a large-scale and a mesoscale resuspension test, STORM (Castelo et al., 1999) and BISE (Alloul-Marmor, 2002).

F. Zhang; M. Reeks; M. Kissane; R. J. Perkins

2012-06-09T23:59:59.000Z

125

Resuspension of small particles from multilayer deposits in turbulent boundary layers  

Science Journals Connector (OSTI)

Abstract This paper describes a hybrid kinetic model for the resuspension of micron-size particles from multilayer deposits in a fully developed turbulent boundary layer. The rate of removal of particles from any given layer depends upon the rate of removal of particles from the layer above which acts as a source of uncovering and exposure of particles to the resuspending flow. The primary resuspension rate constant for an individual particle within a layer is based on the Rock'n'Roll (R'n'R) model using non-Gaussian statistics for the aerodynamic removal forces acting on the particles (Zhang et al., 2013). The coupled layer equations that describe multilayer resuspension of all the particles in each layer are based on the generic lattice model of Friess & Yadigaroglu (2001) which is extended here to include the influence of layer coverage and particle size distribution. The model is used to investigate a range of effects, including the influence of layer thickness on resuspension, the spread of inter-particle adhesive forces within layers, Gaussian and non-Gaussian pdfs for the removal forces and the associated timescales. Finally model predictions are compared with data from two resuspension experiments – STORM (Castelo et al., 1999) and BISE (Alloul-Marmor, 2002).

F. Zhang; M.W. Reeks; M.P. Kissane; R.J. Perkins

2013-01-01T23:59:59.000Z

126

Four-Dimensional Data Assimilation Boundary-Layer Observations Over the Southern  

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

Boundary-Layer Observations Over the Southern Boundary-Layer Observations Over the Southern Great Plains Cloud and Radiation Testbed Site During the November Flux-Profiler Test s. P. Oncley and J. Van Baelen National Center for Atmospheric Research(8) Boulder, CO 80307-3000 Introduction Resu Its Figure 1 shows the raw data from two of the ten profile patterns flown during this experiment. Each aircraft profile consisted of a descent to the profiler site followed by 3-5 legs at increasing heights. Note that because of this flightpattern, the downward and upward profiles may differ due to temporal changes during the time of the pattern (about 50 minutes) and due to horizontal gradients. The profiler was operated in DBS mode alternating between two sets of three beams. Thus, two sets of consensus- averaged winds were available. Finally, several

127

The effects of sound on the boundary layer of an airfoil at high angles of attack  

E-Print Network (OSTI)

* Numbers in parentheses refer to the References. introducing sound waves into the airstream by means of a variable-frequency oscillator and a loudspeaker mounted near the leading edge of a flat plate. Eventually, another method of producing... these disturbances was settled upon, but several interesting results caused by the use of sound were noted. Laminar boundary layer oscillations could be induced, depending upon the proper combination of sound frequency, speaker position, and free stream velocity...

Hutchinson, Thomas Ira

1963-01-01T23:59:59.000Z

128

Unexpected vertical wind speed profiles in the boundary layer over the southern North Sea  

Science Journals Connector (OSTI)

Abstract Shallow atmospheric internal boundary layers over the southern part of the North Sea are common. Analysis of one year of meteorological data from the FINO1 research platform in the German Bight reveals that vertical wind speed profiles frequently do not conform to the expected modified logarithmic profile of Monin–Obukhov similarity theory. The wind profiles are mostly characterized by local maxima or kinks within the first 100 m over the sea surface. The data reveals the most frequent occurrence of a single maximum, but multiple maxima are often present, and there are sometimes even reversed profiles with the wind speed decreasing with height. The expected modified logarithmic profile occurs for a minority of cases. The evidence suggests the frequent presence of internal boundary layers that propagate from coastal land masses that surround the North Sea. A census of vertical wind speed profiles is presented that shows how different inflection states are linked with wind speed and atmospheric stability. The kinks are most prevalent in the upper part of the measurement range near the 100 m hub height of modern offshore the wind turbines, so that internal boundary layers represent a possible concern for the offshore wind energy industry in the North Sea region.

Anthony J. Kettle

2014-01-01T23:59:59.000Z

129

Observations of the Evolution of the Nocturnal and Convective Boundary Layers and the Structure of Open-Celled Convection on 14 June 2002  

Science Journals Connector (OSTI)

The Boundary Layer Evolution (BLE) missions of the International H2O Project (IHOP_2002) were designed to provide comprehensive observations of the distribution of water vapor in the quiescent boundary layer and its evolution during the early ...

Lindsay J. Bennett; Tammy M. Weckwerth; Alan M. Blyth; Bart Geerts; Qun Miao; Yvette P. Richardson

2010-07-01T23:59:59.000Z

130

34th AIAA Fluid Dynamics Conference and Exhibit, June 28July 1, 2004/Portland, OR DNS of Hypersonic Turbulent Boundary Layers  

E-Print Network (OSTI)

of Hypersonic Turbulent Boundary Layers M. Pino Martin Department of Mechanical and Aerospace Engineering and hypersonic turbu- lent boundary layers. The systematic procedure for initializing the turbulent flow fields layers is important in advancing supersonic and hypersonic flight technology. In a high-speed boundary

MartĂ­n, Pino

131

The Effect of Heavy Oil Viscosity Reduction by Solvent Dissolution on Natural Convection in the Boundary Layer of VAPEX  

Science Journals Connector (OSTI)

We have studied the effect of viscosity on natural convection in the boundary layer of the vapor extraction (VAPEX) process. VAPEX is a heavy oil recovery method that uses solvents to reduce oil viscosity, and...

Mohammad Javaheri; Jalal Abedi

2013-09-01T23:59:59.000Z

132

A Climatological Study of Boundary Layer Wind Speed Using a Meso-?-Scale Higher-Order Closure Model  

Science Journals Connector (OSTI)

A mesoscale higher-order closure atmospheric boundary layer model has been used to get more detailed information than is possible from observations regarding horizontal and vertical variations of the wind in an area in southeastern Sweden. To ...

Hans Bergström

1996-08-01T23:59:59.000Z

133

Mean Structure and diurnal cycle of Southeast Atlantic boundary layer clouds: Insights from satellite observations and multiscale modeling framework simulations  

Science Journals Connector (OSTI)

The mean structure and diurnal cycle of Southeast (SE) Atlantic boundary layer clouds are described with satellite observations and multi-scale modeling framework (MMF) simulations during austral spring (September-November). Hourly resolution ...

David Painemal; Kuan-Man Xu; Anning Cheng; Patrick Minnis; Rabindra Palikonda

134

Effect of Finite Spatial Resolution on the Turbulent Energy Spectrum Measured in the Coastal Ocean Bottom Boundary Layer  

Science Journals Connector (OSTI)

The effect of finite spatial resolution on the measured energy spectrum is examined via a parametric study using in situ particle image velocimetry (PIV) measurements performed in the bottom boundary layer on the Atlantic continental shelf. Two-...

Erin E. Hackett; Luksa Luznik; Joseph Katz; Thomas R. Osborn

2009-12-01T23:59:59.000Z

135

Glacial Cooling in the Tropics: Exploring the Roles of Tropospheric Water Vapor, Surface Wind Speed, and Boundary Layer Processes  

Science Journals Connector (OSTI)

This paper is a modeling study of possible roles for tropospheric water vapor, surface wind speed, and boundary layer processes in glacial cooling in the Tropics. The authors divide the Tropics into a region of persistent deep convection and a ...

Richard Seager; Amy C. Clement; Mark A. Cane

2000-07-01T23:59:59.000Z

136

A Comparison Between Boundary Layer Measurements in a Laminar Separation Bubble Flow and Linear Stability Theory Calculations  

Science Journals Connector (OSTI)

This research examines the details of the boundary layer flowfield from wind tunnel measurements of a two-dimensional Liebeck LA2573A airfoil over a range of Reynolds numbers from 235000 to 500000. In this range,...

P. LeBlanc; R. Blackwelder; R. Liebeck

1989-01-01T23:59:59.000Z

137

Characteristics of wind speed and wind direction in the atmospheric boundary layer on the southern coast of Bulgaria  

Science Journals Connector (OSTI)

The characteristics of wind speed and wind direction in the boundary atmospheric layer measured ... meteorological station. The sodar measurement data on wind parameters at different heights in different months ....

M. A. Novitskii; L. K. Kulizhnikova…

2012-03-01T23:59:59.000Z

138

Highly Accurate Solutions of the Blasius and Falkner-Skan Boundary Layer Equations via Convergence Acceleration  

E-Print Network (OSTI)

A new highly accurate algorithm for the solution of the Falkner-Skan equation of boundary layer theory is presented. The algorithm, based on a Maclaurin series representation, finds its coefficients from recurrence. In addition, Wynn-epsilon convergence acceleration and continuous analytical continuation enable an accurate evaluation. The most accurate skin friction coefficients (shooting angle) to date are presented along with comparisons to past and present values found in the literature. The algorithm, coded in FORTRAN, uses neither enhanced precision arithmetic beyond quadruple precision nor computer algebra to achieve results in a timely fashion. Key Words: Falkner-Skan flow; Blasius flow; Wynn-epsilon acceleration; Romberg acceleration; Continuous analytical continuation

B. D. Ganapol

2010-06-19T23:59:59.000Z

139

Planetary boundary layer depth in Global climate models induced biases in surface climatology  

E-Print Network (OSTI)

The Earth has warmed in the last century with the most rapid warming occurring near the surface in the arctic. This enhanced surface warming in the Arctic is partly because the extra heat is trapped in a thin layer of air near the surface due to the persistent stable-stratification found in this region. The warming of the surface air due to the extra heat depends upon the amount of turbulent mixing in the atmosphere, which is described by the depth of the atmospheric boundary layer (ABL). In this way the depth of the ABL determines the effective response of the surface air temperature to perturbations in the climate forcing. The ABL depth can vary from tens of meters to a few kilometers which presents a challenge for global climate models which cannot resolve the shallower layers. Here we show that the uncertainties in the depth of the ABL can explain up to 60 percent of the difference between the simulated and observed surface air temperature trends and 50 percent of the difference in temperature variability...

Davy, Richard

2014-01-01T23:59:59.000Z

140

Model of the boundary layer of a vacuum-arc magnetic filter  

SciTech Connect

A model is developed to describe the electrostatic boundary layer in a positively biased magnetic filter in filtered arcs with low collisionality. The set of equations used includes the electron momentum equation, with an anomalous collision term due to micro-instabilities leading to Bohm diffusion, electron mass conservation, and Poisson equation. Analytical solutions are obtained, valid for the regimes of interest, leading to an explicit expression to determine the electron density current to the filter wall as a function of the potential of the filter and the ratio of electron density at the plasma to that at the filter wall. Using a set of planar and cylindrical probes it is verified experimentally that the mentioned ratio of electron densities remains reasonably constant for different magnetic field values and probe bias, which allows to obtain a closed expression for the current. Comparisons are made with the experimentally determined current collected at different sections of a positively biased straight filter.

Minotti, F.; Giuliani, L.; Grondona, D.; Della Torre, H.; Kelly, H. [Departamento de Fisica, FCEyN, Universidad de Buenos Aires, Instituto de Fisica del Plasma, CONICET-UBA, Cdad. Universitaria, Pab.I, 1428 Buenos Aires (Argentina)

2013-03-21T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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

Pulsed Plasma with Synchronous Boundary Voltage for Rapid Atomic Layer Etching  

SciTech Connect

Atomic Layer ETching (ALET) of a solid with monolayer precision is a critical requirement for advancing nanoscience and nanotechnology. Current plasma etching techniques do not have the level of control or damage-free nature that is needed for patterning delicate sub-20 nm structures. In addition, conventional ALET, based on pulsed gases with long reactant adsorption and purging steps, is very slow. In this work, novel pulsed plasma methods with synchronous substrate and/or “boundary electrode” bias were developed for highly selective, rapid ALET. Pulsed plasma and tailored bias voltage waveforms provided controlled ion energy and narrow energy spread, which are critical for highly selective and damage-free etching. The broad goal of the project was to investigate the plasma science and engineering that will lead to rapid ALET with monolayer precision. A combined experimental-simulation study was employed to achieve this goal.

Economou, Demetre J.; Donnelly, Vincent M.

2014-05-13T23:59:59.000Z

142

Electron distributions observed with Langmuir waves in the plasma sheet boundary layer  

SciTech Connect

The present paper investigates the Langmuir turbulence driven by counter-streaming electron beams and its plausible association with observed features in the Earth's plasma sheet boundary layer region. A one-dimensional electrostatic particle-in-cell simulation code is employed in order to simulate broadband electrostatic waves with characteristic frequency in the vicinity of the electron plasma frequency ?/?{sub pe}?1.0. The present simulation confirms that the broadband electrostatic waves may indeed be generated by the counter-streaming electron beams. It is also found that the observed feature associated with low energy electrons, namely quasi-symmetric velocity space plateaus, are replicated according to the present simulation. However, the present investigation only partially succeeds in generating the suprathermal tails such that the origin of observed quasi power-law energetic population formation remains outstanding.

Hwang, Junga [Solar and Space Weather Research Group, Korea Astronomy and Space Science Institute, Daejeon 305-348 (Korea, Republic of); Department of Astronomy and Space Science, University of Science and Technology, Daejeon (Korea, Republic of); Rha, Kicheol [Department of Physics, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of); Seough, Jungjoon [Solar and Space Weather Research Group, Korea Astronomy and Space Science Institute, Daejeon 305-348 (Korea, Republic of); Yoon, Peter H. [School of Space Research, Kyung Hee University, Yongin-Si, Gyeonggi-Do 446-701 (Korea, Republic of); Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742 (United States)

2014-09-15T23:59:59.000Z

143

Boundary layer flow and heat transfer analysis of a second-grade fluid  

SciTech Connect

Boundary layer flow and heat transfer analysis of a homogeneous, incompressible, non-Newtonian fluid of grade two at a stagnation point is presented. The flow is assumed to be steady and laminar. A power-law representation is assumed for the velocity distribution and wall temperature variation. The governing equations are solved using an iterative central difference approximation method in a non-uniform grid domain. This analysis show the effect of non-Newtonian nature of the fluid and the effect of suction/injection on the velocity profile. The effect of non-Newtonian nature of the fluid on the heat transfer coefficient at the wall for different values of Prandtl number and wall-temperature variation is also presented. (VC)

Massoudi, M. [USDOE Pittsburgh Energy Technology Center, PA (United States); Ramezan, M. [Burns and Roe Services Corp., Pittsburgh, PA (United States)

1992-04-01T23:59:59.000Z

144

LES of a Spatially Developing Atmospheric Boundary Layer: Application of a Fringe Method for the Stratocumulus to Shallow Cumulus Cloud Transition  

Science Journals Connector (OSTI)

An arrangement of a large-eddy simulation (LES) is described that facilitates a spatially developing thermally stratified atmospheric boundary layer (ABL). When the inflow and outflow boundary conditions are specified, the LES of stably stratified ...

M. Inoue; G. Matheou; J. Teixeira

2014-09-01T23:59:59.000Z

145

Understanding the role of organic aerosol in the coastal and remote pacic marine boundary layer  

E-Print Network (OSTI)

than 600 m). Vertical velocity and wind speed profiles are? v ), vertical velocity (w ) and horizontal wind speed (WS)? v ), vertical velocity (w ), horizontal wind speed (WS),

Hawkins, Lelia Nahid

2010-01-01T23:59:59.000Z

146

Aerosol-Cloud-Precipitation Interactions in the Trade Wind Boundary Layer.  

E-Print Network (OSTI)

??This dissertation includes an overview of aerosol, cloud, and precipitation properties associated with shallow marine cumulus clouds observed during the Barbados Aerosol Cloud Experiment (BACEX,… (more)

Jung, Eunsil

2012-01-01T23:59:59.000Z

147

Boundary-Layer Meteorol (2008) 127:7395 DOI 10.1007/s10546-007-9255-9  

E-Print Network (OSTI)

-scale (SFS) models to reproduce the statistical proper- ties of SFS stresses and energy transfers over boundary layer. In this study, several SFS models are evaluated a priori using experimental data acquired down- wind of a rough-to-smooth transition in a wind tunnel. The SFS models studied include the eddy

Porté-Agel, Fernando

148

Wind profile above the surface boundary layer S.-E. Gryning (1), E. Batchvarova (2) and B. Brmmer (3)  

E-Print Network (OSTI)

Wind profile above the surface boundary layer S.-E. Gryning (1), E. Batchvarova (2) and B. BrĂĽmmer in predictions of the wind profile in the lowest hundreds me- ters of the atmosphere, being connected to the general increase in height of structures such as bridges, high houses and wind turbines. The hub height

149

IMPACT OF BOUNDARY-LAYER CUTTING AND FLOW CONDITIONING ON FREE-SURFACE BEHAVIOR IN TURBULENT LIQUID SHEETS  

E-Print Network (OSTI)

IMPACT OF BOUNDARY-LAYER CUTTING AND FLOW CONDITIONING ON FREE-SURFACE BEHAVIOR IN TURBULENT LIQUID dimension) = 1 cm into ambient air are compared with empirical correlations at a nearly prototypical term, for a well- conditioned jet but is not a substitute for well-designed flow conditioning. I

California at San Diego, University of

150

Measurement of Vertical Kinetic Energy and Vertical Velocity Skewness in Oceanic Boundary Layers by Imperfectly Lagrangian Floats  

Science Journals Connector (OSTI)

The effects of upward buoyancy on the accuracy with which Lagrangian floats can measure the Eulerian mean variance ?ww?E and skewness SwE of vertical fluid velocity w in the wind-driven upper-ocean boundary layer is investigated using both ...

Ramsey R. Harcourt; Eric A. D’Asaro

2010-11-01T23:59:59.000Z

151

Transforming the representation of the boundary layer and low clouds for high-resolution regional climate modeling: Final report  

SciTech Connect

Stratocumulus and shallow cumulus clouds in subtropical oceanic regions (e.g., Southeast Pacific) cover thousands of square kilometers and play a key role in regulating global climate (e.g., Klein and Hartmann, 1993). Numerical modeling is an essential tool to study these clouds in regional and global systems, but the current generation of climate and weather models has difficulties in representing them in a realistic way (e.g., Siebesma et al., 2004; Stevens et al., 2007; Teixeira et al., 2011). While numerical models resolve the large-scale flow, subgrid-scale parameterizations are needed to estimate small-scale properties (e.g. boundary layer turbulence and convection, clouds, radiation), which have significant influence on the resolved scale due to the complex nonlinear nature of the atmosphere. To represent the contribution of these fine-scale processes to the resolved scale, climate models use various parameterizations, which are the main pieces in the model that contribute to the low clouds dynamics and therefore are the major sources of errors or approximations in their representation. In this project, we aim to 1) improve our understanding of the physical processes in thermal circulation and cloud formation, 2) examine the performance and sensitivity of various parameterizations in the regional weather model (Weather Research and Forecasting model; WRF), and 3) develop, implement, and evaluate the advanced boundary layer parameterization in the regional model to better represent stratocumulus, shallow cumulus, and their transition. Thus, this project includes three major corresponding studies. We find that the mean diurnal cycle is sensitive to model domain in ways that reveal the existence of different contributions originating from the Southeast Pacific land-masses. The experiments suggest that diurnal variations in circulations and thermal structures over this region are influenced by convection over the Peruvian sector of the Andes cordillera, while the mostly dry mountain-breeze circulations force an additional component that results in semi-diurnal variations near the coast. A series of numerical tests, however, reveal sensitivity of the simulations to the choice of vertical grid, limiting the possibility of solid quantitative statements on the amplitudes and phases of the diurnal and semidiurnal components across the domain. According to our experiments, the Mellor-Yamada-Nakanishi-Niino (MYNN) boundary layer scheme and the WSM6 microphysics scheme is the combination of schemes that performs best. For that combination, mean cloud cover, liquid water path, and cloud depth are fairly wellsimulated, while mean cloud top height remains too low in comparison to observations. Both microphysics and boundary layer schemes contribute to the spread in liquid water path and cloud depth, although the microphysics contribution is slightly more prominent. Boundary layer schemes are the primary contributors to cloud top height, degree of adiabaticity, and cloud cover. Cloud top height is closely related to surface fluxes and boundary layer structure. Thus, our study infers that an appropriate tuning of cloud top height would likely improve the low-cloud representation in the model. Finally, we show that entrainment governs the degree of adiabaticity, while boundary layer decoupling is a control on cloud cover. In the intercomparison study using WRF single-column model experiments, most parameterizations show a poor agreement of the vertical boundary layer structure when compared with large-eddy simulation models. We also implement a new Total-Energy/Mass- Flux boundary layer scheme into the WRF model and evaluate its ability to simulate both stratocumulus and shallow cumulus clouds. Result comparisons against large-eddy simulation show that this advanced parameterization based on the new Eddy-Diffusivity/Mass-Flux approach provides a better performance than other boundary layer parameterizations.

Huang, Hsin-Yuan; Hall, Alex

2013-07-24T23:59:59.000Z

152

Open-loop control of noise amplification in a separated boundary layer flow  

SciTech Connect

Linear optimal gains are computed for the subcritical two-dimensional separated boundary-layer flow past a bump. Very large optimal gain values are found, making it possible for small-amplitude noise to be strongly amplified and to destabilize the flow. The optimal forcing is located close to the summit of the bump, while the optimal response is the largest in the shear layer. The largest amplification occurs at frequencies corresponding to eigenvalues which first become unstable at higher Reynolds number. Nonlinear direct numerical simulations show that a low level of noise is indeed sufficient to trigger random flow unsteadiness, characterized here by large-scale vortex shedding. Next, a variational technique is used to compute efficiently the sensitivity of optimal gains to steady control (through source of momentum in the flow, or blowing/suction at the wall). A systematic analysis at several frequencies identifies the bump summit as the most sensitive region for control with wall actuation. Based on these results, a simple open-loop control strategy is designed, with steady wall suction at the bump summit. Linear calculations on controlled base flows confirm that optimal gains can be drastically reduced at all frequencies. Nonlinear direct numerical simulations also show that this control allows the flow to withstand a higher level of stochastic noise without becoming nonlinearly unstable, thereby postponing bypass transition. In the supercritical regime, sensitivity analysis of eigenvalues supports the choice of this control design. Full restabilization of the flow is obtained, as evidenced by direct numerical simulations and linear stability analysis.

Boujo, E., E-mail: edouard.boujo@epfl.ch; Gallaire, F., E-mail: francois.gallaire@epfl.ch [Laboratory of Fluid Mechanics and Instabilities, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne (Switzerland); Ehrenstein, U., E-mail: ehrenstein@irphe.univ-mrs.fr [Aix Marseille Université, CNRS, Centrale Marseille, IRPHE UMR 7342, F-13384 Marseille (France)

2013-12-15T23:59:59.000Z

153

Particle resuspension in turbulent boundary layers and the influence of non-Gaussian removal forces  

Science Journals Connector (OSTI)

The work described is concerned with the way micron-size particles attached to a surface are resuspended when exposed to a turbulent flow. An improved version of the Rock’n’Roll model (Reeks & Hall, 2001) is developed where this model employs a stochastic approach to resuspension involving the rocking and rolling of a particle about surface asperities arising from the moments of the fluctuating drag forces acting on the particle close to the surface. In this work, the model is improved by using values of both the streamwise fluid velocity and acceleration close to the wall obtained from Direct Numerical Simulation (DNS) of turbulent channel flow. Using analysis and numerical calculations of the drag force on a sphere near a wall in shear flow (O’Neill, 1968; Lee & Balachandar, 2010) these values are used to obtain the joint distribution of the moments of the fluctuating drag force f(t) and its derivative f ? ( t ) acting on a particle attached to a surface. In so doing the influence of highly non-Gaussian forces (associated with the sweeping and ejection events in a turbulent boundary layer) on short and long term resuspension rates is examined for a sparse monolayer coverage of particles, along with the dependence of the resuspension upon the timescale of the particle motion attached to the surface, the ratio of the rms/mean of the removal force and the distribution of adhesive forces. Model predictions of the fraction resuspended are compared with experimental results.

F. Zhang; M. Reeks; M. Kissane

2013-01-01T23:59:59.000Z

154

Experimental study of acoustic radiation from a boundary layer transition region  

Science Journals Connector (OSTI)

Wall pressurefluctuations were measured on a rigid axisymmetric body in the CEPRA 19 low?noise anechoic wind tunnel using flush?mounted microphones placed from the laminar region to the fully turbulent boundary layer. Microphones placed in the laminar flow region are used to detect noise radiated from the transition region which occurs naturally without separation under a slightly positive pressure gradient. Cross?spectral analyses show upstream acoustic propagation in a very wide frequency band 4–30 kHz detected in the laminar region. A method of conditional analysis is then used to establish the sequence of events from the onset of near?harmonic instability wave packets to the generation about 10 ms later of turbulent spots leading to the acoustic emission. This intermittent acoustic radiation is detected in the nearfield for wind velocities ranging from 20–70 ms. Farfield detection was not achieved probably because of instrument limitations and propagation effects. [Work supported by DRET Direction des Recherches et Etudes Techniques.

J. C. Perraud; A. Julienne

1986-01-01T23:59:59.000Z

155

Stability and Turbulence in the Atmospheric Boundary Layer: A Comparison of Remote Sensing and Tower Observations  

SciTech Connect

When monitoring winds and atmospheric stability for wind energy applications, remote sensing instruments present some advantages to in-situ instrumentation such as larger vertical extent, in some cases easy installation and maintenance, measurements of vertical humidity profiles throughout the boundary layer, and no restrictions on prevailing wind directions. In this study, we compare remote sensing devices, Windcube lidar and microwave radiometer, to meteorological in-situ tower measurements to demonstrate the accuracy of these measurements and to assess the utility of the remote sensing instruments in overcoming tower limitations. We compare temperature and wind observations, as well as calculations of Brunt-Vaisala frequency and Richardson numbers for the instrument deployment period in May-June 2011 at the U.S. Department of Energy National Renewable Energy Laboratory's National Wind Technology Center near Boulder, Colorado. The study reveals that a lidar and radiometer measure wind and temperature with the same accuracy as tower instruments, while also providing advantages for monitoring stability and turbulence. We demonstrate that the atmospheric stability is determined more accurately when the liquid-water mixing ratio derived from the vertical humidity profile is considered under moist-adiabatic conditions.

Friedrich, K.; Lundquist, J. K.; Aitken, M.; Kalina, E. A.; Marshall, R. F.

2012-01-01T23:59:59.000Z

156

Progress in Natural Science Vol.16 (Special 1ssue), June 2006 Marine and Non-marine Jurassic : Boundary Events and Correlation  

E-Print Network (OSTI)

Progress in Natural Science Vol.16 (Special 1ssue), June 2006 Preface Marine and Non-marine-21] . In addition, there were great biotic changes during the Jurassic Period including the ma- jor biodiversity in both the marine and terrestrial ecosystems. A variety of experiences and approaches have been

Olsen, Paul E.

157

Boundary-Layer Stability and Transition on a Flared Cone in a Mach 6 Quiet Wind Tunnel  

E-Print Network (OSTI)

quality features. .................................. 31? 2?4 Upstream settling chamber flow conditioning components. .............................. 31? 2?5 Cross-section of contraction?nozzle assembly, with bleed lip and plenum. ...... 33? 3?1 Cross... by maximizing the laminar extent of the nozzle-wall boundary layer. After much research, success was achieved with a design as depicted by Figure 1?5(b). A bleed slot is employed upstream of the nozzle throat for the extraction of the contraction...

Hofferth, Jerrod William

2013-05-15T23:59:59.000Z

158

Nitric oxide emissions from the high-temperature viscous boundary layers of hypersonic aircraft within the stratosphere  

SciTech Connect

The authors study the nitric oxide emission characteristics of supersonic aircraft resulting from heating of viscous boundary layers along the skin of the aircraft. Previous study has concentrated on nitric oxide emissions coming from combustion products from the scramjet engines. This work shows that above mach 8, emissions from viscous heating become a significant factor in total emission of nitric oxide. Above mach 16 it becomes the dominant source of emission.

Brooks, S.B.; Lewis, M.J.; Dickerson, R.R. [Univ. of Maryland, College Park, MD (United States)

1993-09-20T23:59:59.000Z

159

Collaborative Research: ARM observations for the development and evaluation of models and parameterizations of cloudy boundary layers  

SciTech Connect

This is a collaborative project with Dr. Ping Zhu at Florida International University. It was designed to address key issues regarding the treatment of boundary layer cloud processes in climate models with UM’s research focusing on the analyses of ARM cloud radar observations from MMCR and WACR and FIU’s research focusing on numerical simulations of boundary layer clouds. This project capitalized on recent advancements in the ARM Millimeter Cloud Radar (MMCR) processing and the development of the WACR (at the SGP) to provide high temporal and spatial resolution Doppler cloud radar measurements for characterizing in-cloud turbulence, large-eddy circulations, and high resolution cloud structures of direct relevance to high resolution numerical modeling studies. The principal focus of the observational component of this collaborative study during this funding period was on stratocumulus clouds over the SGP site and fair-weather cumuli over the Nauru site. The statistical descriptions of the vertical velocity structures in continental stratocumulus clouds and in the Nauru shallow cumuli that are part of this study represents the most comprehensive observations of the vertical velocities in boundary layer clouds to date and were done in collaboration with Drs. Virendra Ghate and Pavlos Kollias.

Albrecht, Bruce,

2013-07-12T23:59:59.000Z

160

Time-dependent laser ignition of a combustible stagnant boundary layer  

Science Journals Connector (OSTI)

......research-article Articles Time-dependent laser ignition of a combustible stagnant boundary...55,257-268 Time-dependent laser ignition of a combustible stagnant boundary...examines the conditions for laser ignition of a number of industrial gases......

J. ADLER

1995-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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

Friction of a slider on a granular layer: Non-monotonic thickness dependence and effect of boundary conditions  

E-Print Network (OSTI)

We investigate the effective friction encountered by a mass sliding on a granular layer as a function of bed thickness and boundary roughness conditions. The observed friction has minima for a small number of layers before it increases and saturates to a value which depends on the roughness of the sliding surface. We use an index-matched interstitial liquid to probe the internal motion of the grains with fluorescence imaging in a regime where the liquid has no significant effect on the measured friction. The shear profiles obtained as a function of depth show decrease in slip near the sliding surface as the layer thickness is increased. We propose that the friction depends on the degree of grain confinement relative to the sliding surfaces.

Saloome Siavoshi; Ashish V. Orpe; Arshad Kudrolli

2005-12-22T23:59:59.000Z

162

Seismic and gravitational studies of melting in the mantle's thermal boundary layers  

E-Print Network (OSTI)

This thesis presents three studies which apply geophysical tools to the task of better understanding mantle melting phenomena at the upper and lower boundaries of the mantle. The first study uses seafloor bathymetry and ...

Van Ark, Emily M

2007-01-01T23:59:59.000Z

163

Large-Eddy Simulation of Stratified Turbulence. Part II: Application of the Stretched-Vortex Model to the Atmospheric Boundary Layer  

Science Journals Connector (OSTI)

The buoyancy-adjusted stretched-vortex subgrid-scale (SGS) model is assessed for a number of large-eddy simulations (LESs) corresponding to diverse atmospheric boundary layer conditions. The cases considered are free convection, a moderately ...

Georgios Matheou; Daniel Chung

2014-12-01T23:59:59.000Z

164

A Numerical Study of the Evolving Convective Boundary Layer and Orographic Circulation around the Santa Catalina Mountains in Arizona. Part I: Circulation without Deep Convection  

Science Journals Connector (OSTI)

The daytime evolution of the thermally forced boundary layer (BL) circulation over an isolated mountain, about 30 km in diameter and 2 km high, is examined by means of numerical simulations validated with data collected in the Cumulus ...

J. Cory Demko; Bart Geerts

2010-05-01T23:59:59.000Z

165

The effect of tangential mass addition on the boundary layer velocity distribution of a flat plate at zero angle of attack  

E-Print Network (OSTI)

. V . RESULTS AND DISCUSSION 16 18 20 21 24 Boundary Layer Conditions Downstream of Blowing Slot . Boundary Layer Conditions Upstream of Slot Accuracy of Data 24 40 47 VI. CONCLUSIONS AND RECOMMENDATIONS ~ 51 LITERATURE CITED 54 APPENDIX... 55 Estimation of Error Caused by Leaks in the Pressure Measuring System 56 LIST OF FIGURES Figure Page 3" x 48" Smoke Tunnel 2. Flat Plate Model 3. Schematic of Pressure System 4. Volume Flow Rates of Working Pipe Tap Orifice 14 Variation...

Miller, Edward Peter

2012-06-07T23:59:59.000Z

166

A Lagrangian stochastic model for estimating the high order statistics of a fluctuating plume in the neutral boundary layer  

Science Journals Connector (OSTI)

We use a Lagrangian stochastic micromixing model to predict the concentration fluctuations of a continuous release in a neutral boundary layer. We present the computational algorithm that implements the interaction by exchange with the conditional mean model and we compare the numerical solutions with the experimental values in order to evaluate the reliability of the model. The influence of the source size on the concentration probability density function in the near and far-field is discussed and some shortcomings of the model are pointed out.

Massimo Marro; Chiara Nironi; Pietro Salizzoni; Lionel Soulhac

2014-01-01T23:59:59.000Z

167

Experimental development of the predictive relations for the eddy exchange coefficients for momentum and heat in the atmospheric boundary layer  

E-Print Network (OSTI)

, increase in w by removing the dummy -1 bases was 4. 2 cm/sec , and u for these runs was 330 cm/sec -I ?? Using sin [w/u] as a measure of the tilt of the wind field gave an inclination of . 72', in fair agreement with KAIMAL's relation. Therefore.... '?'illlam H. Clayton Direct measurements of the eddy fluxes of mo. . . entum and heat were. made in the atmospheric boundary layer simultaneously with measurements of the profiles of average wind velocity and tempera- ture to evaluate the capability...

Jensen, Paul Alfred

2012-06-07T23:59:59.000Z

168

Microstructure of Josephson junctions: Effect on supercurrent transport in YBCO grain boundary and barrier layer junctions  

SciTech Connect

The electric transport of high-temperature superconductors, such as YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} (YBCO), can be strongly restricted by the presence of high-angle grain boundaries (GB). This weak-link behavior is governed by the macroscopic GB geometry and the microscopic grain boundary structure and composition at the atomic level. Whereas grain boundaries present a considerable impediment to high current applications of high T{sub c} materials, there is considerable commercial interest in exploiting the weak-link-nature of grain boundaries for the design of microelectronic devices, such as superconducting quantum interference devices (SQUIDs). The Josephson junctions which form the basis of this technology can also be formed by introducing artificial barriers into the superconductor. The authors have examined both types of Josephson junctions by EM techniques in an effort to understand the connection between microstructure/chemistry and electrical transport properties. This knowledge is a valuable resource for the design and production of improved devices.

Merkle, K.L.; Huang, Y.

1998-01-01T23:59:59.000Z

169

Alternate Designs of Ultrasonic Absorptive Coatings for Hypersonic Boundary Layer Control  

E-Print Network (OSTI)

-wall boundary condition. A particular case with a relatively shallow cavities and very high porosity showed number, wawb/µw Re Reynolds number, eUe/µe s Cavity spacing T Temperature t Time U Freestream streamwise of thermal protection systems (TPS).2,3 State-of- the-art active and reactive lam- inar flow control (LFC

Dabiri, John O.

170

Atmospheric Environment 34 (2000) 2851}2863 Resolution of pollutant concentrations in the boundary layer  

E-Print Network (OSTI)

Atmospheric Environment 34 (2000) 2851}2863 Resolution of pollutant concentrations in the boundary 1999 Abstract This paper investigates the solution of a 3D atmospheric dispersion problem using a time to solve the atmospheric di!usion equation. Preliminary studies of dispersion from a single source

Utah, University of

171

An Examination of Configurations for Using Infrared to Measure Boundary Layer Transition  

E-Print Network (OSTI)

reflections are the driving issues in designing an IR system for detecting transition. Aluminum has a high thermal diffusivity so is a poor choice for this method. However, its performance can be improved using an insulating layer. Internal fluid circulation...

Freels, Justin Reed

2012-10-19T23:59:59.000Z

172

Modeling scatterers embedded in plane?layered media by a hybrid Haskell?Thompson and boundary integral equation method  

Science Journals Connector (OSTI)

A hybrid Haskell?Thompson and Boundary IntegralEquation (BIE) method is formulated which can model the acoustic and elastic response of scatterers embedded in plane?layered media. The scatterers can have an arbitrary smooth shape but must not intersect layer interfaces. The Green's function of the scatterer is computed by BIEs in the (x z w) domain and the Green's functions of the layers is computed by a Haskell?Thompson method in the (kx z w) domain. Their fields are coupled by the appropriate combination of FFTs and extrapolation operators and are finally summed up in a Born series. For notational convenience this hybrid method will be called a Generalized Born Series (GBS) method. Two advantages of the GBS method are (1) it is more efficient than finite elements or finite differences for small scatterers embedded in thickly layered media; and (2) no artificial side reflections are generated from the infinitely extended plane interfaces. The disadvantages are (1) the convergence rate of the GBS depends on the model and is unknown a priori; and (2) the computation time increases with the size of the scatterer. [Work supported by MIDAS a consortium of oil and geophysical companies.

Gerard T. Schuster; Lance Smith

1984-01-01T23:59:59.000Z

173

Modeling scatterers embedded in plane?layered media by a hybrid Haskell–Thomson and boundary integral equation method  

Science Journals Connector (OSTI)

A hybrid Haskell–Thomson and boundary integralequation (BIE) method is formulated which can model the acoustic or elastic response of scatterers embedded in plane?layered media. The scatterers can have an arbitrary smooth shape but must not intersect layer interfaces. The Green’s function of the scatterer is computed by BIEs in the (x z ?) domain and the Green’s function of the layers is computed by a Haskell–Thomson method in the (k x z ?) domain. Their fields are coupled by the appropriate combination of FFTs and extrapolation operators and are finally summed up in a Born series. For notational convenience this hybrid method will be called a generalized Born series (GBS) method. Two advantages of the GBS method are (1) it is more efficient than finite elements or finite differences for small scatterers embedded in thickly layered media and (2) no artificial side reflections are generated from the infinitely extended plane interfaces. The disadvantages are (1) the convergence rate of the GBS depends on the model and is unknown a p r i o r i and (2) the computation time increases with the size of the scatterer.

Gerard T. Schuster; Lance C. Smith

1985-01-01T23:59:59.000Z

174

Wake Turbulence of Two NREL 5-MW Wind Turbines Immersed in a Neutral Atmospheric Boundary-Layer Flow  

E-Print Network (OSTI)

The fluid dynamics video considers an array of two NREL 5-MW turbines separated by seven rotor diameters in a neutral atmospheric boundary layer (ABL). The neutral atmospheric boundary-layer flow data were obtained from a precursor ABL simulation using a Large-Eddy Simulation (LES) framework within OpenFOAM. The mean wind speed at hub height is 8m/s, and the surface roughness is 0.2m. The actuator line method (ALM) is used to model the wind turbine blades by means of body forces added to the momentum equation. The fluid dynamics video shows the root and tip vortices emanating from the blades from various viewpoints. The vortices become unstable and break down into large-scale turbulent structures. As the wakes of the wind turbines advect further downstream, smaller-scale turbulence is generated. It is apparent that vortices generated by the blades of the downstream wind turbine break down faster due to increased turbulence levels generated by the wake of the upstream wind turbine.

Bashioum, Jessica L; Schmitz, Sven; Duque, Earl P N

2013-01-01T23:59:59.000Z

175

A novel Whole Air Sample Profiler (WASP) for the quantification of volatile organic compounds in the boundary layer  

SciTech Connect

The emission and fate of reactive VOCs is of inherent interest to those studying chemical biosphere-atmosphere interactions. In-canopy VOC observations are obtainable using tower-based samplers, but the lack of suitable sampling systems for the full boundary 5 layer has limited the data characterizing the vertical structure of such gases above the canopy height and still in the boundary layer. This is the important region where many reactive VOCs are oxidized or otherwise removed. Here we describe an airborne sampling system designed to collect a vertical profile of air into a 3/800 OD tube 150m in length. The inlet ram air pressure is used to flow sampled air through the 10 tube, which results in a varying flow rate based on aircraft speed and altitude. Since aircraft velocity decreases during ascent, it is necessary to account for the variable flow rate into the tube. This is accomplished using a reference gas that is pulsed into the air stream so that the precise altitude of the collected air can be reconstructed post-collection. The pulsed injections are also used to determine any significant effect 15 from diffusion/mixing within the sampling tube, either during collection or subsequent extraction for gas analysis. This system has been successfully deployed, and we show some measured vertical profiles of isoprene and its oxidation products methacrolein and methyl vinyl ketone from a mixed canopy near Columbia, Missouri.

Mak, J. E.; Su, L.; Guenther, Alex B.; Karl, Thomas G.

2013-10-16T23:59:59.000Z

176

Use of shear-stress-sensitive, temperature-insensitive liquid crystals for hypersonic boundary-layer transition detection  

SciTech Connect

The use of shear-stress-sensitive, temperature-insensitive (SSS/TI) liquid crystals (LCs) has been evaluated as a boundary-layer transition detection technique for hypersonic flows. Experiments were conducted at Mach 8 in the Sandia National Laboratories Hypersonic Wind Tunnel using a flat plate model at near zero-degree angle of attack over the freestream unit Reynolds number range 1.2-5.8x10{sup 6}/ft. Standard 35mm color photography and Super VHS color video were used to record LC color changes due to varying surface shear stress during the transition process for a range of commercial SSS liquid crystals. Visual transition data were compared to an established method using calorimetric surface heat-transfer measurements to evaluate the LC technique. It is concluded that the use of SSS/TI LCs can be an inexpensive, safe, and easy to use boundary-layer transition detection method for hypersonic flows. However, a valid interpretation of the visual records requires careful attention to illumination intensity levels and uniformity, lighting and viewing angles, some prior understanding of the general character of the flow, and the selection of the appropriate liquid crystal for the particular flow conditions.

Aeschliman, D.P.; Croll, R.H.; Kuntz, D.W.

1997-04-01T23:59:59.000Z

177

Sustaining marine life beyond boundaries: Options for an implementing agreement for marine biodiversity beyond national jurisdiction under the United Nations Convention on the Law of the Sea  

Science Journals Connector (OSTI)

Abstract For nearly a decade, governments have been discussing the need to improve efforts to conserve and sustainably use marine biodiversity in areas beyond national jurisdiction (ABNJ). Support for a new international agreement under the United Nations Convention on the Law of the Sea (UNCLOS) – an Implementing Agreement – on the conservation and sustainable use of marine biodiversity in ABNJ has been growing. In June 2012, at the United Nations Conference on Sustainable Development held in Rio de Janeiro, Brazil, States agreed to take a decision on the development of an international instrument under UNCLOS before the end of the 69th session of the United Nations General Assembly (UNGA), which runs from September 2014 to August 2015. In follow-up to this commitment, it was agreed to consider the “scope, parameters and feasibility” of this instrument. To inform these international discussions, this article highlights some potential options for the content of a new UNCLOS Implementing Agreement. It first reviews the history of UN discussions, and then elaborates on options to address key elements identified as priorities for States in 2011: marine genetic resources, including the sharing of benefits, area-based management tools, including marine protected areas, environmental impact assessments, capacity-building and the transfer of marine technology. It addresses cross-cutting issues such as the governing principles, institutional structure as well as on other critical points such as High Seas fishing and flag State responsibilities. The article concludes with suggestions on possible next steps in order to succeed in the negotiations for an agreement.

Elisabeth Druel; Kristina M. Gjerde

2014-01-01T23:59:59.000Z

178

A physical model of the turbulent boundary layer consonant with mean momentum balance structure  

Science Journals Connector (OSTI)

...compared with the prevalent, well-established, model. Some...O(U ) ((u tau /kappa)log(delta/C)) D (wake layer...Engineering, University of Alabama. Wark, C.E , and H.M Nagib1991Experimental...comparison, the prevalent, well-established, physical model...

2007-01-01T23:59:59.000Z

179

Squeezout phenomena and boundary layer formation of a model ionic liquid under confinement and charging  

E-Print Network (OSTI)

Electrical charging of parallel plates confining a model ionic liquid down to nanoscale distances yields a variety of charge-induced changes in the structural features of the confined film. That includes even-odd switching of the structural layering and charging-induced solidification and melting, with important changes of local ordering between and within layers, and of squeezout behavior. By means of molecular dynamics simulations, we explore this variety of phenomena in the simplest charged Lennard-Jones coarse-grained model including or excluding the effect a neutral tail giving an anisotropic shape to one of the model ions. Using these models and open conditions permitting the flow of ions in and out of the interplate gap, we simulate the liquid squeezout to obtain the distance dependent structure and forces between the plates during their adiabatic appraoch under load. Simulations at fixed applied force illustrate an effective electrical pumping of the ionic liquid, from a thick nearly solid film that withstands the interplate pressure for high plate charge to complete squeezout following melting near zero charge. Effective enthalpy curves obtained by integration of interplate forces versus distance show the local minima that correspond to layering, and predict the switching between one minimum and another under squeezing and charging.

R. Capozza; A. Vanossi; A. Benassi; E. Tosatti

2014-12-22T23:59:59.000Z

180

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

Note: This page contains sample records for the topic "marine boundary layer" 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

Data/model integration for vertical mixing in the stable Arctic boundary layer  

SciTech Connect

This is the final report of a short Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). Data on atmospheric trace constituents and the vertical structure of stratus clouds from a 1996 expedition to the central Arctic reveal mechanisms of vertical mixing that have not been observed in mid-latitudes. Time series of the altitude and thickness of summer arctic stratus have been observed using an elastic backscatter lidar aboard an icebreaker. With the ship moored to the pack ice during 14 data collection stations and the lidar staring vertically, the time series represent advected cloud fields. The lidar data reveal a significant amount of vertical undulation in the clouds, strongly suggestive of traveling waves in the buoyantly damped atmosphere that predominates in the high Arctic. Concurrent observations of trace gases associated with the natural sulfur cycle (dimethyl sulfide, SO{sub 2}, NH{sub 3}, H{sub 2}O{sub 2}) and aerosols show evidence of vertical mixing events that coincide with a characteristic signature in the cloud field that may be called dropout or lift out. A segment of a cloud deck appears to be relocated from the otherwise quasicontinuous layer to another altitude a few hundred meters lower or higher. Atmospheric models have been applied to identify the mechanism that cause the dropout phenomenon and connect it dynamically to the surface layer mixing.

Barr, S.; ReVelle, D.O.; Kao, C.Y.J.; Bigg, E.K.

1998-12-31T23:59:59.000Z

182

Influence of the Summer Marine Layer on Maritime Chaparral and Implications for Conservation Policy in the California Coastal Zone  

E-Print Network (OSTI)

multiple nuclear power plants, offshore oil rigs up and downthe impacts of the power plant on offshore shallow marine

Vasey, Michael Charles

2012-01-01T23:59:59.000Z

183

Wind-Tunnel Simulation of the Wake of a Large Wind Turbine in a Stable Boundary Layer: Part 2, the Wake Flow  

Science Journals Connector (OSTI)

Measurements have been made in the wake of a model wind turbine in both a neutral and a stable atmospheric boundary layer, in the EnFlo stratified-flow wind tunnel, between 0.5 and 10 rotor diameters from the ...

Philip E. Hancock; Frauke Pascheke

2014-04-01T23:59:59.000Z

184

Boundary Layer Lubrication  

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

2009 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting, May 18-22, 2009 -- Washington D.C.

185

Boundary Layer Lubrication  

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

Presentation from the U.S. DOE Office of Vehicle Technologies "Mega" Merit Review 2008 on February 25, 2008 in Bethesda, Maryland.

186

Boundary Layer Lubrication Mechanisms  

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

2010 DOE Vehicle Technologies and Hydrogen Programs Annual Merit Review and Peer Evaluation Meeting, June 7-11, 2010 -- Washington D.C.

187

Boundary Layer Lubrication Mechanisms  

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

2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation

188

Solar wind energy transfer regions inside the dayside magnetopause: Accelerated heavy ions as tracers for MHD-processes in the dayside boundary layer  

Science Journals Connector (OSTI)

Plasma and magnetic field data from PROGNOZ-7 have revealed that solar wind (magnetosheath) plasma elements may penetrate the dayside magnetopause surface and form high density regions with enhanced cross-field flow in the boundary layer. The injected magnetosheath plasma is observed to have an excess drift velocity as compared to the local boundary layer plasma, comprising both “cold” plasma of terrestrial origin and a hot ring current component. A differential drift between two plasma components can be understood in terms of a momentum transfer process driven by an injected magnetosheath plasma population. The braking action of the injected plasma may be described as a dynamo process where particle kinetic energy is transferred into electromagnetic energy (electric field). The generated electric field will force the local plasma to ?×B-drift, and the dynamo region therefore also constitutes an accelerator region for the local plasma. Whenever energy is dissipated from the energy transfer process (a net current is flowing through a load), there will also be a difference between the induced electric field and the v×B term of the generator plasma. Thus, the local plasma will drift more slowly than the injected generator plasma. We will present observations showing that a relation between the momentum transferred, the injected plasma and the momentum taken up by the local plasma exists. For instance, if the local plasma density is sufficiently high, the differential drift velocity of the injected and local plasma will be small. A large fraction of the excess momentum is then transferred to the local plasma. Conversely, a low local plasma density results in a high velocity difference and a low fraction of local momentum transfer. In our study cases the “cold” plasma component was frequently found to dominate the local magnetospheric plasma density in the boundary layer. Accordingly, this component may have the largest influence on the local momentum transfer process. We will demonstrate that this also seems to be the case. Moreover we show that the accelerated “cold” plasma component may be used as a tracer element reflecting both the momentum and energy transfer and the penetration process in the dayside boundary layer. The high He+ percentage of the accelerated “cold” plasma indicates a plasmaspheric origin. Considering the quite high densities of energetic He+ found in the boundary layer, the overall low abundance of He+ (as compared to e.g. O+) found in the plasma sheet and outer ring current evidently reduces the importance of the dayside boundary layer as a plasma source in the large scale magnetospheric circulation system.

R. Lundin; E.M. Dubinin

1985-01-01T23:59:59.000Z

189

Measurement of Boundary-Layer Temperature Profiles by a Scanning 5-MM Radiometer During the 1999 Winter NSA/AAO Radiometer Exp  

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

Boundary-Layer Temperature Profiles by Boundary-Layer Temperature Profiles by a Scanning 5-MM Radiometer During the 1999 Winter NSA/AAO Radiometer Experiment and WVIOP 2000 V. Y. Leuski and E. R. Westwater Cooperative Institute for Research in the Environmental Sciences National Oceanic and Atmospheric Administration Environmental Technology Laboratory University of Colorado Boulder, Colorado Introduction A scanning 5-mm-wavelength radiometer was deployed during two Intensive Operational Periods (IOPs) at the Atmospheric Radiation Measurement (ARM) Program's Cloud and Radiation Testbed (CART) facilities. The first was conducted at the North Slope of Alaska (NSA) and Adjacent arctic Ocean (AAO) site near Barrow, Alaska, during March 1999. One goal was to evaluate the ability of an

190

Nitrogen Oxides in the Nocturnal Boundary Layer: Chemistry of Nitrous Acid (HONO) and the Nitrate Radical (N03)  

SciTech Connect

Summary Chemical processes occurring at night in the lowest part of the urban atmosphere, the so called nocturnal boundary layer (NBL), can influence the composition of the atmosphere during the night as well as the following day. They may impact the budgets of some of the most important pollutants, such as ozone and nitrogen oxides, as well as influence size and composition of particular matter. Few studies have thus far concentrated on the nocturnal chemistry of the urban NBL, most likely due to the strong influence of vertical transport and mixing, which requires the measurement of trace gas profiles instead of simple point observations. Motivated by our lack of observations and understanding of nocturnal chemistry, the focus of this project was the study of the vertical distribution of trace gases and the altitude dependence of nocturnal chemistry under polluted conditions through field observations and modeling studies. The analysis of three field experiments (TEXAQS, Houston, 2000; Phoenix Sunrise Ozone Experiment, 2001; NAPOX, Boston, 2002), two of which were performed in this project, showed that ozone concentrations typically increase with height in the lowest 150m, while NO2 typically decreases. NO3, the dominant nocturnal radical species, showed much higher concentrations in the upper part of the NBL, and was often not present at the ground. With the help of a one-dimensional chemical transport model, developed in this project, we found that the interaction of ground emissions of NOx and hydrocarbons, together with their vertical transport, is responsible for the vertical profiles. The dominant chemical reactions influencing ozone, NO2 and NO3 are the reaction of ozone and NO3 with freshly emitted NO. Sensitivity studies with our model showed that the magnitude of the trace gas gradients depend both on the emission rates and the vertical stability of the NBL. Observations and model analysis clearly show that nocturnal chemistry in urban areas is altitude dependent. Measurements at one altitude, for example at the ground, where most air quality monitoring stations are located, are not representative for the rest of the NBL. Our model also revealed that radical chemistry is, in general, altitude dependent at night. We distinguish three regions: an unreactive, NO rich, ground layer; an upper, O3 and NO3 dominated layer, and a reactive mixing layer, where RO2 radicals are mixed from aloft with NO from the ground. In this reactive layer an active radical chemistry and elevated OH radical levels can be found. The downward transport of N2O5 and HO2NO2, followed by their thermal decay, was also identified as a radical source in this layer. Our observations also gave insight into the formation of HONO in the NBL. Based on our field experiments we were able to show that the NO2 to HONO conversion was relative humidity dependent. While this fact was well known, we found that it is most likely the uptake of HONO onto surfaces which is R.H. dependent, rather than the NO2 to HONO conversion. This finding led to the proposal of a new NO2 to HONO conversion mechanism, which is based on solid physical chemical principles. Noteworthy is also the observation of enhanced NO2 to HONO conversion during a dust storm event in Phoenix. The final activity in our project investigated the influence of the urban canopy, i.e. building walls and surfaces, on nocturnal chemistry. For the first time the surface area of a city was determined based on a Geographical Information System database of the city of Santa Monica. The surface to volume areas found in this study showed that, in the 2 lower part of the NBL, buildings provide a much larger surface area than the aerosol. In addition, buildings take up a considerable amount of the volume near the ground. The expansion of our model and sensitivity studies based on the Santa Monica data revealed that the surface area of buildings considerably influences HONO levels in urban areas. The volume reduction leads to a decrease of O3 and an increase of NO2 near the ground due to the stronger impact o

Jochen Stutz

2005-05-24T23:59:59.000Z

191

Dissipation of Marine Stratiform Clouds and Collapse of the Marine Boundary Layer Due to the Depletion of Cloud Condensation Nuclei by Clouds  

Science Journals Connector (OSTI)

...JOURNAL OF THE ATMOSPHERIC SCIENCES...of cloud condensation nuclei by...and 2533 water molecules...Department of Atmospheric Sciences...of cloud condensation nuclei...of cloud water. Albrecht...liquid-water content...depending on the atmospheric conditions...the-6-hour recovery from the...

Andrew S. Ackerman; Owen B. Toon; Peter V. Hobbs

1993-10-08T23:59:59.000Z

192

Remediation of Contaminated Marine Sediment Using Thin-Layer Capping with Activated Carbon—A Field Experiment in Trondheim Harbor, Norway  

Science Journals Connector (OSTI)

Remediation of Contaminated Marine Sediment Using Thin-Layer Capping with Activated Carbon—A Field Experiment in Trondheim Harbor, Norway ... Innovative chemical and biological monitoring methods were deployed to test capping effectiveness. ... (1) Two earlier pilot studies on AC amendment in the field have been established: one at Hunters Point, in San Francisco Bay, CA,(2, 3) and the other at Grasse River, NY.(1) The first field test aimed at remediating polychlorinated biphenyl (PCB)-contaminated mud flats in the San Francisco Bay, and the second field study was carried out on a permanently inundated freshwater river bed also contaminated with PCBs. ...

Gerard Cornelissen; Marie Elmquist Krusĺ; Gijs D. Breedveld; Espen Eek; Amy M.P. Oen; Hans Peter H. Arp; Caroline Raymond; Göran Samuelsson; Jenny E. Hedman; Řystein Stokland; Jonas S. Gunnarsson

2011-06-14T23:59:59.000Z

193

Atmospheric Sciences Program Department of Marine, Earth and Atmospheric Sciences (MEAS)  

E-Print Network (OSTI)

atmospheric chemistry/air quality, boundary layer and air pollution meteorology, regional/global climatology MODELING OF MULTIPLE AIR POLLUTANTS AT URBAN AND REGIONAL SCALES Our atmosphere is a complex systemAtmospheric Sciences Program Department of Marine, Earth and Atmospheric Sciences (MEAS) (http

Parker, Matthew D. Brown

194

Heat transfer in a horizontal fluid layer heated from below upon rotation of one of the boundaries  

Science Journals Connector (OSTI)

The mixed convection in a horizontal fluid layer which is generated by uniform heating from below and by rotation of one ... studied experimentally. The region occupied by the fluid is a cylinder of radius320 mm ...

V. S. Berdnikov; V. A. Markov

195

On Techniques to Characterize and Correlate Grain Size, Grain Boundary Orientation and the Strength of the SiC Layer of TRISO Coated Particles: A Preliminary Study  

SciTech Connect

The mechanical properties of the silicon carbide (SiC) layer of the TRi-ISOtropic (TRISO) coated particle (CP) for high temperature gas reactors (HTGR) are performance parameters that have not yet been standardized by the international HTR community. Presented in this paper are the results of characterizing coated particles to reveal the effect of annealing temperature (1000 to 2100°C) on the strength and grain size of unirradiated coated particles. This work was further expanded to include possible relationships between the grain size and strength values. The comparative results of two strength measurement techniques and grain size measured by the Lineal intercept method are included. Preliminary grain boundary characterization results determined by electron backscatter diffraction (EBSD) are included. These results are also important for future fission product transport studies, as grain boundary diffusion is identified as a possible mechanism by which 110mAg, one of the fission activation products, might be released through intact SiC layers. Temperature is a parameter known to influence the grain size of SiC and therefore it is important to investigate the effect of high temperature annealing on the SiC grain size. Recommendations and future work will also be briefly discussed.

I.J.van Rooyen; J.L. Dunzik Gougar; T. Trowbridge; Philip M van Rooyen

2012-10-01T23:59:59.000Z

196

Interface boundary conditions for dynamic magnetization and spin wave dynamics in a ferromagnetic layer with the interface Dzyaloshinskii-Moriya interaction  

SciTech Connect

In this work, we derive the interface exchange boundary conditions for the classical linear dynamics of magnetization in ferromagnetic layers with the interface Dzyaloshinskii-Moriya interaction (IDMI). We show that IDMI leads to pinning of dynamic magnetization at the interface. An unusual peculiarity of the IDMI-based pinning is that its scales as the spin-wave wave number. We incorporate these boundary conditions into an existing numerical model for the dynamics of the Damon-Eshbach spin wave in ferromagnetic films. IDMI affects the dispersion and the frequency non-reciprocity of the travelling Damon-Eshbach spin wave. For a broad range of film thicknesses L and wave numbers, the results of the numerical simulations of the spin wave dispersion are in a good agreement with a simple analytical expression, which shows that the contribution of IDMI to the dispersion scales as 1/L, similarly to the effect of other types of interfacial anisotropy. Suggestions to experimentalists how to detect the presence of IDMI in a spin wave experiment are given.

Kostylev, M. [School of Physics, M013, University of Western Australia, Crawley, Perth 6009, Western Australia (Australia)

2014-06-21T23:59:59.000Z

197

Marine Biology  

E-Print Network (OSTI)

this  door. ”   Marine  Biology   I  joined  the  military  RIVERSIDE   Marine  Biology   A Thesis submitted in partialBiology                                                                                                                        

Zaffino, Kyle

2013-01-01T23:59:59.000Z

198

Pattern formation properties of a system of interaction-diffusion equations relevant to a mussel-algae ecosystem in a quiescent marine layer .  

E-Print Network (OSTI)

??A particular interaction-diffusion mussel-algae model system for the development of spontaneous stationary young mussel bed patterning on a homogeneous substrate covered by a quiescent marine… (more)

[No author

2014-01-01T23:59:59.000Z

199

Microphysical Structure of the Marine Boundary Layer under Strong Wind and Spray Formation as Seen from Simulations Using a 2D Explicit  

E-Print Network (OSTI)

in the vertical profiles of wind speed occurring with in- creasing wind speeds were attributed to a decrease generation is de- termined by a source function depending on the background wind speed assumed in the surface roughness and the drag coefficient for wind speeds exceeding about 33 m s21 . This decrease

Mark, Pinsky

200

Observation of daytime N2O5 in the marine boundary layer during New England Air Quality StudyIntercontinental Transport and  

E-Print Network (OSTI)

; Wallington et al., 1986] and aldehydes [Atkinson, 1991; D'Anna et al., 2001] are efficient pathways

Note: This page contains sample records for the topic "marine boundary layer" 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

Complex-plasma boundaries  

Science Journals Connector (OSTI)

This study deals with the boundary between a normal plasma of ions and electrons, and an adjacent complex plasma of ions, electrons, and microparticles, as found in innumerable examples in nature. Here we show that the matching between the two plasmas involve electrostatic double layers. These double layers explain the sharp boundaries observed in the laboratory and in astrophysics. A modified theory is derived for the double layers that form at the discontinuity between two different complex plasmas and at the point of contact of three complex plasmas. The theory is applied to the first measurements from the Plasma Kristall Experiment (PKE) Nefedov Laboratory in the International Space Station.

B. M. Annaratone; S. A. Khrapak; P. Bryant; G. E. Morfill; H. Rothermel; H. M. Thomas; M. Zuzic; V. E. Fortov; V. I. Molotkov; A. P. Nefedov; S. Krikalev; Yu. P. Semenov

2002-11-26T23:59:59.000Z

202

Correlation Between Grain and Grain-Boundary Critical Current Densities in ex situ Coated Conductors with Variable YBa2Cu3O7- ? Layer Thickness  

SciTech Connect

The dependence of the percolative critical current density at low magnetic fields on YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO) layer thickness is studied by comparing grain, J{sub c}{sup G}, and grain-boundary, J{sub c}{sup GB}, critical current densities for a series of ex situ processed YBCO films on a RABiTS template. Both critical current densities decrease as a function of thickness and the values of J{sub c}{sup G} and J{sub c}{sup GB} show a clear correlation which suggests the existence of an interaction between Abrikosov-Josephson vortices on the grain boundaries and Abrikosov vortices in the bulk of the grains. This opens the possibility to improve J{sub c}{sup GB} by optimizing the pinning capabilities of the grains.

Palau, A. [ICMAB, Barcelona, Spain; Puig, T. [ICMAB, Barcelona, Spain; Obradors, X. [ICMAB, Barcelona, Spain; Feenstra, Roeland [ORNL; Gapud, Albert Agcaoili [ORNL

2006-01-01T23:59:59.000Z

203

Marine pollution  

SciTech Connect

This book covers the following topics: Transport of marine pollutants; Transformation of pollutants in the marine environment; Biological effects of marine pollutants; Sources and transport of oil pollutants in the Persian Gulf; Trace metals and hydrocarbons in Syrian coastal waters; and Techniques for analysis of trace pollutants.

Albaiges, J. (Centro de Investigacion y Desarrollo, CSIC, Barcelona (ES))

1989-01-01T23:59:59.000Z

204

Thin-Layer Chromatography-Pyrolysis-Gas Chromatography-Mass Spectrometry: a Multidimensional Approach to Marine Lipid Class and Molecular Species Analysis  

Science Journals Connector (OSTI)

......the resealing of the system, and the restoration of the carrier gas (He) pressure...10. C.C. Parrish. Separation of aquatic lipid classes by Chromarod thin- layer...C. Parrish. Lipids in Freshwater Ecosystems. M.T. Arts and B.C. Wainman......

Edward D. Hudson; Robert J. Helleur; Christopher C. Parrish

2001-04-01T23:59:59.000Z

205

Axial bearing with gas lubrication for marine turbines  

Science Journals Connector (OSTI)

The possibility of enhancing the carrying capacity of the lubricant layer in bearings with gas lubrication is considered, for marine turbines. The basic design features of the hybrid...

M. V. Gribinichenko; A. V. Kurenskii; N. V. Sinenko

2013-10-01T23:59:59.000Z

206

Marine Lubricants  

Science Journals Connector (OSTI)

Marine diesel engines are classified by speed, either ... detergents/dispersants, antioxidants, corrosion inhibitors, anti-wear/load-carrying/ep, pour-point depressants and ... . There are no simple systems for c...

B. H. Carter; D. Green

2010-01-01T23:59:59.000Z

207

Marine energy  

Science Journals Connector (OSTI)

...improve as the cost of gas rises and carbon...horizontal axis turbine (similar to wind...similar to a wind turbine rotor) mounted on...difficulties in maintaining progress in a new marine technology...Lunar Energy uses a turbine designed by Rotech...energy. A recent report by the Carbon Trust...

2007-01-01T23:59:59.000Z

208

Entropy Production in Relativistic Jet Boundary Layers  

E-Print Network (OSTI)

Hot relativistic jets, passing through a background medium with a pressure gradient p \\propto r^{-\\eta} where 2 gamma-ray bursts from ...

Kohler, Susanna

2014-01-01T23:59:59.000Z

209

Dynamic Balances in a Wavy Boundary Layer  

Science Journals Connector (OSTI)

The authors analyze the influence of waves on the budgets of momentum flux and kinetic energy in the atmospheric flow over sea surface waves and use the findings to reinterpret the results from the earlier empirical studies on the subject. This ...

Tihomir Hristov; Jesus Ruiz-Plancarte

2014-12-01T23:59:59.000Z

210

Boundary layer induced by a conical vortex  

Science Journals Connector (OSTI)

......for later convenience. On the other hand, in order to improve the accuracy of the computations as the axis is approached, we rede fi ne the radial coordinate as l =? ln ?, (29) so that the interval 1 ? ? ? 0 is mapped onto 0 ? l < ?. Substituting (26......

R. Fernandez-Feria; J. C. Arrese

2000-11-01T23:59:59.000Z

211

Numerical Experiments in Supersonic Boundary Layer Stability  

E-Print Network (OSTI)

advances in supersonic and hypersonic aerospace technology have led to a renewed interest in the stability Methods Branch M. Y. Hussaini Institute for Computer Applications in Science and Engineering NASA Langley­dimensional quantity superscripts T : transpose â?? : Fourier component 0 : perturbation variable 2 Introduction Recent

Erlebacher, Gordon

212

Thunderstorm influence on boundary layer winds  

E-Print Network (OSTI)

moisture convergence The ambient condition, horizontal moisture convergence, through the vertical, was determined using the vector identity v . qv2 = v2 v q + q v ' V2 p p p (2) where q is specific humidity. Term 1 was computed by the centered finite... the relationship rpo J (v qv) dp ? 7 ('v. . qv) 1 p=900 1 =1 14 where N is the number of 50 mb pressure levels beginning with the 900 mb level to the level of zero divergence, p , the integral of horizontal 0' moisture convergence was determined by summing...

Schmidt, Jill Marie

2012-06-07T23:59:59.000Z

213

Seawind Marine | Open Energy Information  

Open Energy Info (EERE)

Seawind Marine Seawind Marine Jump to: navigation, search Name Seawind Marine Place Plymouth, England, United Kingdom Zip PL1 5NE Sector Services, Wind energy Product Focused on project management, engineering, construction and operations services for the wind energy industry. Coordinates 43.75681°, -87.984809° 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":43.75681,"lon":-87.984809,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

214

First State Marine Wind | Open Energy Information  

Open Energy Info (EERE)

State Marine Wind State Marine Wind Jump to: navigation, search Name First State Marine Wind Facility First State Marine Wind Sector Wind energy Facility Type Offshore Wind Facility Status Proposed Owner Gamesa / Blue Hen Wind Inc Developer First State Marine Wind LLC Location Atlantic Ocean DE Coordinates 38.836°, -75.154° 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":38.836,"lon":-75.154,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

215

The origins of tropical marine biodiversity  

Science Journals Connector (OSTI)

Recent phylogeographic studies have overturned three paradigms for the origins of marine biodiversity. (i) Physical (allopatric) isolation is not the sole avenue for marine speciation: many species diverge along ecological boundaries. (ii) Peripheral habitats such as oceanic archipelagos are not evolutionary graveyards: these regions can export biodiversity. (iii) Speciation in marine and terrestrial ecosystems follow similar processes but are not the same: opportunities for allopatric isolation are fewer in the oceans, leaving greater opportunity for speciation along ecological boundaries. Biodiversity hotspots such as the Caribbean Sea and the Indo-Pacific Coral Triangle produce and export species, but can also accumulate biodiversity produced in peripheral habitats. Both hotspots and peripheral ecosystems benefit from this exchange in a process dubbed biodiversity feedback.

Brian W. Bowen; Luiz A. Rocha; Robert J. Toonen; Stephen A. Karl

2013-01-01T23:59:59.000Z

216

MarineSIM: Robot simulation for marine environments  

E-Print Network (OSTI)

Development of robust navigation algorithms for marine robotics is a challenge faced by many marine robotists. This paper presents MarineSIM, a marine robot simulation platform which provides an infrastructure to easily ...

Senarathne, P. G. C. Namal

217

Etat des lieux en robotique marine et sous-marine  

E-Print Network (OSTI)

robots marins et applications ASV : Autonomous Surface Vehicle · Propulsion: moteur, vent, houle ROVEtat des lieux en robotique marine et sous-marine Cas particulier de la commande des mini-véhicules sous-marins Vincent Creuze (MCF), LIRMM, Montpellier Animateur axe robotique marine et sous-marine du

Paris-Sud XI, Université de

218

Assessing regional scale predictions of aerosols, marine stratocumulus, and their interactions during VOCALS-REx using WRF-Chem  

SciTech Connect

This study assesses the ability of the recent chemistry version (v3.3) of the Weather Research and Forecasting (WRF-Chem) model to simulate boundary layer structure, aerosols, stratocumulus clouds, and energy fluxes over the Southeast Pacific Ocean. Measurements from the VAMOS Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-REx) and satellite retrievals (i.e., products from the MODerate resolution Imaging Spectroradiometer (MODIS), Clouds and Earth's Radiant Energy System (CERES), and GOES-10) are used for this assessment. The Morrison double-moment microphysics scheme is newly coupled with interactive aerosols in the model. The 31-day (15 October-16 November 2008) WRF-Chem simulation with aerosol-cloud interactions (AERO hereafter) is also compared to a simulation (MET hereafter) with fixed cloud droplet number concentrations in the microphysics scheme and simplified cloud and aerosol treatments in the radiation scheme. The well-simulated aerosol quantities (aerosol number, mass composition and optical properties), and the inclusion of full aerosol-cloud couplings lead to significant improvements in many features of the simulated stratocumulus clouds: cloud optical properties and microphysical properties such as cloud top effective radius, cloud water path, and cloud optical thickness. In addition to accounting for the aerosol direct and semi-direct effects, these improvements feed back to the simulation of boundary-layer characteristics and energy budgets. Particularly, inclusion of interactive aerosols in AERO strengthens the temperature and humidity gradients within the capping inversion layer and lowers the marine boundary layer (MBL) depth by 130 m from that of the MET simulation. These differences are associated with weaker entrainment and stronger mean subsidence at the top of the MBL in AERO. Mean top-of-atmosphere outgoing shortwave fluxes, surface latent heat, and surface downwelling longwave fluxes are in better agreement with observations in AERO, compared to the MET simulation. Nevertheless, biases in some of the simulated meteorological quantities (e.g., MBL temperature and humidity) and aerosol quantities (e.g., underestimations of accumulation mode aerosol number) might affect simulated stratocumulus and energy fluxes over the Southeastern Pacific, and require further investigation. The well-simulated timing and outflow patterns of polluted and clean episodes demonstrate the model's ability to capture daily/synoptic scale variations of aerosol and cloud properties, and suggest that the model is suitable for studying atmospheric processes associated with pollution outflow over the ocean. The overall performance of the regional model in simulating mesoscale clouds and boundary layer properties is encouraging and suggests that reproducing gradients of aerosol and cloud droplet concentrations and coupling cloud-aerosol-radiation processes are important when simulating marine stratocumulus over the Southeast Pacific.

Yang Q.; Lee Y.; Gustafson Jr., W. I.; Fast, J. D.; Wang, H.; Easter, R. C.; Morrison, H.; Chapman, E. G.; Spak, S. N.; Mena-Carrasco, M. A.

2011-12-02T23:59:59.000Z

219

Layering Technologies  

Science Journals Connector (OSTI)

Planar technology requires that thin layers of materials be formed and patterned sequentially, commencing with a flat rigid substrate. The key aspects of each layer are its Thi...

Ivor Brodie; Julius J. Muray

1992-01-01T23:59:59.000Z

220

Marine Biodiversity & Biotechnology  

E-Print Network (OSTI)

Centre for Marine Biodiversity & Biotechnology No one knows how many species live in the sea this biodiversity needs expertise from classical marine biology to the latest molecular genetics techniques Biodiversity & Biotechnology. The CMBB was established in 1999 to tackle the challenges of understanding marine

Howie, Jim

Note: This page contains sample records for the topic "marine boundary layer" 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

Marine cloud brightening  

Science Journals Connector (OSTI)

...will not be as effective in marine stratocumulus clouds that are...Engineering steps to implement marine cloud brightening (a) Introduction...brightening by increasing the CCN of marine stratus clouds (by way of...vessel and the optimum means of propulsion. In fact, both these aspects...

2012-01-01T23:59:59.000Z

222

Marine Mechanical Engineer Full Time Position Wanted: Marine Mechanical Engineer  

E-Print Network (OSTI)

the following; Marine Systems Design and Engineering (fuel, water, HVAC, compressed air, exhaust, lube oil, etcMarine Mechanical Engineer Full Time Position Wanted: Marine Mechanical Engineer Boksa Marine Design, Inc. is a growing naval architecture and marine engineering firm specializing in the design

Eustice, Ryan

223

Finite element analysis of shells with layers  

E-Print Network (OSTI)

It is well established that thin shell structures frequently feature narrow bands of strain concentration and localized displacement irregularities referred to as boundary and internal layers. It is crucial to capture these ...

Hiller, Jean-François, 1974-

2002-01-01T23:59:59.000Z

224

Compressed absorbing boundary conditions for the Helmholtz equation  

E-Print Network (OSTI)

Absorbing layers are sometimes required to be impractically thick in order to offer an accurate approximation of an absorbing boundary condition for the Helmholtz equation in a heterogeneous medium. It is always possible ...

Bélanger-Rioux, Rosalie

2014-01-01T23:59:59.000Z

225

Marine Engine Oils  

Science Journals Connector (OSTI)

To some extent marine engine lubricants have similar properties as lubricants ... high oxidation stability, high thermal stability, anti-wear properties, proper detergency, and dispersancy. The ... further discus...

Prof. Tze-Chi Jao; Andre Verhelst

2013-01-01T23:59:59.000Z

226

Marine Diesel Engines  

Science Journals Connector (OSTI)

Marine diesel engines need reserve power to compensate for ... and decreased efficiency of the engine caused by wear and contamination. Minimum efficiency reserves must be...

Michael Palocz-Andresen

2013-01-01T23:59:59.000Z

227

Degenerate Metric Phase Boundaries  

E-Print Network (OSTI)

The structure of boundaries between degenerate and nondegenerate solutions of Ashtekar's canonical reformulation of Einstein's equations is studied. Several examples are given of such "phase boundaries" in which the metric is degenerate on one side of a null hypersurface and non-degenerate on the other side. These include portions of flat space, Schwarzschild, and plane wave solutions joined to degenerate regions. In the last case, the wave collides with a planar phase boundary and continues on with the same curvature but degenerate triad, while the phase boundary continues in the opposite direction. We conjecture that degenerate phase boundaries are always null.

Ingemar Bengtsson; Ted Jacobson

1999-01-23T23:59:59.000Z

228

A comparison of fine particle and aerosol strong acidity at the interface zone (1540 m) and within (452 m) the planetary boundary layer of the Great Gulf and Presidential-Dry River Class I Wildernesses on the Presidential Range, New Hampshire USA  

Science Journals Connector (OSTI)

Mount Washington, NH in the White Mountain National Forest, is flanked to the north-northeast and south by two Class I Wilderness areas, the Great Gulf and Presidential Range-Dry River Wildernesses, respectively. The Clean Air Act protects Class I Area natural resource values from air pollution. Aerosol sulfate, a fine particulate component that is often transported long distances, is a known contributor to visibility degradation and acidic deposition. We examined summertime fine particulate aerosol mass and sulfate, strong acidity and ammonium concentrations from 1988 to 2007 on Mount Washington at two elevations, 452 and 1540 m (msl). The former site is often within, and the latter at the interface of, the planetary boundary layer. Comparisons of sampling interval durations (10 and 24 h) and site vs. site are made. We also examine the extent to which aerosol sulfate is neutralized. Ten hour (daytime) compared to 24 h samples have higher mass and aerosol sulfate concentrations, however paired samples are well correlated. Fine mass concentrations compared between the 452 m and 1540 m sites (standard temperature and pressure corrected) show a weak positive linear relationship with the later being approximately 32% lower. We attribute the lack of a strong correlation to the facts that the 1540 m site is commonly at the interface of and even above the regional planetary boundary layer in summer and that it can intercept different air masses relative to the 452 m site. Sulfate is ?18% lower at the higher elevation site, but comprises a greater percentage of total fine mass; 42% compared to 37% for the high and low elevation site, respectively. Aerosol strong acidity was found to increase with increasing sulfate concentrations at both sites. Further the ratio of hydrogen to sulfate ion was greater in 24 h than 10 h samples at the higher elevation site likely due to overnight transport of fresh acidic aerosols.

Georgia L.D. Murray; Kenneth Kimball; L. Bruce Hill; George A. Allen; Jack M. Wolfson; Alex Pszenny; Thomas Seidel; Bruce G. Doddridge; Alexandra Boris

2009-01-01T23:59:59.000Z

229

Marine Conservation Resource overexploitation  

E-Print Network (OSTI)

Conservation Marine vs, terrestrial? ), Ocean habitat spatially labile · Upwelling# downwelling · Currents % Bluefin tunas# Southern Ocean · )!& million hooks in peak year )1*& · Wandering albatrosses declined Marine conservation laws: fisheries Open ocean fisheries: · 4Tragedy of the Commons5 % Individuals

230

Marine Policy Challenges in developing China's marine protected area system  

E-Print Network (OSTI)

, the country hosts an exceptional marine biodiversity comprising about 20,300 recorded species, including 12Marine Policy Challenges in developing China's marine protected area system Wanfei Qiu a,* , Bin Department of Marine Environment Protection, State Oceanic Administration, No. 1 Fuxingmenwai Avenue, Beijing

Jones, Peter JS

231

Effects of aerosol and horizontal inhomogeneity on the broadband albedo of marine stratus: Numerical simulations  

SciTech Connect

Recent estimates of the effect of increasing of anthropogenic sulfate aerosol on the radiative forcing of the atmosphere have indicated that its impact may be comparable in magnitude to the effect from increases in CO{sub 2}. Much of this impact is expected from the effects of the aerosol on cloud microphysics and the subsequent impact on cloud albedo. A solar broadband version of a 2D radiative transfer model was used to quantify the impact of enhanced aerosol concentrations and horizontal inhomogeneity on the solar broadband albedo of marine stratus. The results of the radiative transfer calculations indicated that in unbroken marine stratus clouds the net horizontal transport of photons over a domain of a few kilometers was nearly zero, and the domain-average broadband albedo computed in a 2D cross section was nearly identical to the domain average calculated from a series of independent pixel approximation (IPA) calculations of the same cross section. However, the horizontal inhomogeneity does affect the cloud albedo compared to plane-parallel approximation (PPA) computations due to the nonlinear relationship between albedo and optical depth. The reduction in cloud albedo could be related to the variability of the distribution of log (cloud optical depth). These results extend the finding of Cahalan et al. to broadband solar albedos in a more realistic cloud model and suggest that accurate computation of domain-averaged broadband albedos in unbroken (or nearly unbroken) marine stratus can be made using IPA calculations with 1D radiative transfer models. Computations of the mean albedo over portions of the 3D RAMS domain show the relative increase in cloud albedo due to a 67% increase in the boundary-layer average CCN concentration was between 6% and 9%. The effects of cloud inhomogeneity on the broadband albedo as measured from the PPA bias ranged from 3% to 5%. 25 refs., 8 figs., 4 tabs.

Duda, D.P.; Stephens, G.L.; Stevens, B.; Cotton, W.R. [Colorado State Univ., Fort Collins, CO (United States)] [Colorado State Univ., Fort Collins, CO (United States)

1996-12-15T23:59:59.000Z

232

Evaluating WRF-Chem aerosol indirect effects in Southeast Pacific marine stratocumulus during VOCALS-REx  

SciTech Connect

We evaluate a regional-scale simulation with the WRF-Chem model for the VAMOS (Variability of the American Monsoon Systems) Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-REx), which sampled the Southeast Pacific's persistent stratocumulus deck. Evaluation of VOCALS-REx ship-based and aircraft observations focuses on analyzing how aerosol loading affects marine boundary layer (MBL) dynamics and cloud microphysics. We compare local time series and campaign averaged longitudinal gradients, and highlight differences in model simulations with (W) and without wet (NW) deposition processes. The higher aerosol loadings in the NW case produce considerable changes in MBL dynamics and cloud microphysics, in accordance with the established conceptual model of aerosol indirect effects. These include increase in cloud albedo, increase in MBL and cloud heights, drizzle suppression, increase in liquid water content, and increase in cloud lifetime. Moreover, better statistical representation of aerosol mass and number concentration improves model fidelity in reproducing observed spatial and temporal variability in cloud properties, including top and base height, droplet concentration, water content, rain rate, optical depth (COD) and liquid water path (LWP). Together, these help to quantify confidence in WRF-Chem's modeled aerosol-cloud interactions, while identifying structural and parametric uncertainties including: irreversibility in rain wet removal; overestimation of marine DMS and sea salt emissions and accelerated aqueous sulfate conversion. Our findings suggest that WRF-Chem simulates marine cloud-aerosol interactions at a level sufficient for applications in forecasting weather and air quality and studying aerosol climate forcing, including the reliability required for policy analysis and geo-engineering applications.

Saide, Pablo; Spak, S. N.; Carmichael, Gregory; Mena-Carrasco, M. A.; Yang, Qing; Howell, S. G.; Leon, Dolislager; Snider, Jefferson R.; Bandy, Alan R.; Collett, Jeffrey L.; Benedict, K. B.; de Szoeke, S.; Hawkins, Lisa; Allen, Grant; Crawford, I.; Crosier, J.; Springston, S. R.

2012-03-30T23:59:59.000Z

233

Testing outer boundary treatments for the Einstein equations  

E-Print Network (OSTI)

Various methods of treating outer boundaries in numerical relativity are compared using a simple test problem: a Schwarzschild black hole with an outgoing gravitational wave perturbation. Numerical solutions computed using different boundary treatments are compared to a `reference' numerical solution obtained by placing the outer boundary at a very large radius. For each boundary treatment, the full solutions including constraint violations and extracted gravitational waves are compared to those of the reference solution, thereby assessing the reflections caused by the artificial boundary. These tests use a first-order generalized harmonic formulation of the Einstein equations. Constraint-preserving boundary conditions for this system are reviewed, and an improved boundary condition on the gauge degrees of freedom is presented. Alternate boundary conditions evaluated here include freezing the incoming characteristic fields, Sommerfeld boundary conditions, and the constraint-preserving boundary conditions of Kreiss and Winicour. Rather different approaches to boundary treatments, such as sponge layers and spatial compactification, are also tested. Overall the best treatment found here combines boundary conditions that preserve the constraints, freeze the Newman-Penrose scalar Psi_0, and control gauge reflections.

Oliver Rinne; Lee Lindblom; Mark A. Scheel

2007-04-05T23:59:59.000Z

234

Marine and Hydrokinetic Technology Glossary  

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

Learn about the basic technologies and key terms used to describe marine and hydrokinetic technologies.

235

Running Boundary Condition  

E-Print Network (OSTI)

In this paper we argue that boundary condition may run with energy scale. As an illustrative example, we consider one-dimensional quantum mechanics for a spinless particle that freely propagates in the bulk yet interacts only at the origin. In this setting we find the renormalization group flow of U(2) family of boundary conditions exactly. We show that the well-known scale-independent subfamily of boundary conditions are realized as fixed points. We also discuss the duality between two distinct boundary conditions from the renormalization group point of view. Generalizations to conformal mechanics and quantum graph are also discussed.

Ohya, Satoshi; Tachibana, Motoi

2010-01-01T23:59:59.000Z

236

Running Boundary Condition  

E-Print Network (OSTI)

In this paper we argue that boundary condition may run with energy scale. As an illustrative example, we consider one-dimensional quantum mechanics for a spinless particle that freely propagates in the bulk yet interacts only at the origin. In this setting we find the renormalization group flow of U(2) family of boundary conditions exactly. We show that the well-known scale-independent subfamily of boundary conditions are realized as fixed points. We also discuss the duality between two distinct boundary conditions from the renormalization group point of view. Generalizations to conformal mechanics and quantum graph are also discussed.

Satoshi Ohya; Makoto Sakamoto; Motoi Tachibana

2010-05-25T23:59:59.000Z

237

Marine Nuclear Propulsion  

Science Journals Connector (OSTI)

... June 30 about 95 qualified scientists and engineers were engaged on research and development on marine nuclear ... nuclear propulsion within his Department, including the Atomic Energy Authority and the Ship Research Association. This ...

1965-07-31T23:59:59.000Z

238

Marine Engine Thermodynamics  

Science Journals Connector (OSTI)

The significance of large two-stroke turbocharged Diesel engines for ship propulsion has been extensively analysed in the previous chapter. Indeed, the marine engine forms the most critical part of the propulsion

Nikolaos Xiros Dr-Eng

2002-01-01T23:59:59.000Z

239

Marine biodiversity characteristics  

Science Journals Connector (OSTI)

Oceans contain the largest living volume of the “blue” planet, inhabited by approximately 235–250,000 described species, all groups included. They only represent some 13% of the known species on the Earth, but the marine biomasses are really huge. Marine phytoplankton alone represents half the production of organic matter on Earth while marine bacteria represent more than 10%. Life first appeared in the oceans more than 3.8 billion years ago and several determining events took place that changed the course of life, ranging from the development of the cell nucleus to sexual reproduction going through multi-cellular organisms and the capture of organelles. Of the 31 animal phyla currently listed, 12 are exclusively marine phyla and have never left the ocean. An interesting question is to try to understand why there are so few marine species versus land species? This pattern of distribution seems pretty recent in the course of Evolution. From an exclusively marine world, since the beginning until 440 million years ago, land number of species much increased 110 million years ago. Specific diversity and ancestral roles, in addition to organizational models and original behaviors, have made marine organisms excellent reservoirs for identifying and extracting molecules (> 15,000 today) with pharmacological potential. They also make particularly relevant models for both fundamental and applied research. Some marine models have been the source of essential discoveries in life sciences. From this diversity, the ocean provides humankind with renewable resources, which are highly threatened today and need more adequate management to preserve ocean habitats, stocks and biodiversity.

Gilles Boeuf

2011-01-01T23:59:59.000Z

240

U.S. Marine Corp Logistics Base | Open Energy Information  

Open Energy Info (EERE)

Marine Corp Logistics Base Marine Corp Logistics Base Jump to: navigation, search Name U.S. Marine Corp Logistics Base Facility U.S. Marine Corp Logistics Base Sector Wind energy Facility Type Community Wind Facility Status In Service Location Barstow CA Coordinates 34.85832705°, -116.9559002° 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":34.85832705,"lon":-116.9559002,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

Note: This page contains sample records for the topic "marine boundary layer" 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

The Influence of Wind Speed on Shallow Marine Cumulus Convection  

Science Journals Connector (OSTI)

The role of wind speed on shallow marine cumulus convection is explored using large-eddy simulations and concepts from bulk theory. Focusing on cases characteristic of the trades, the equilibrium trade wind layer is found to be deeper at stronger ...

Louise Nuijens; Bjorn Stevens

2012-01-01T23:59:59.000Z

242

National Marine Fisheries Service | Open Energy Information  

Open Energy Info (EERE)

Service Service Jump to: navigation, search Logo: National Marine Fisheries Service Name National Marine Fisheries Service Address 1315 East West Highway Place Silver Spring, Maryland Zip 20910 Phone number 301-427-8400 Website http://www.nmfs.noaa.gov/index Coordinates 38.9922542°, -77.0307277° 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":38.9922542,"lon":-77.0307277,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

243

Marine Current Turbines Ltd | Open Energy Information  

Open Energy Info (EERE)

Turbines Ltd Turbines Ltd Jump to: navigation, search Name Marine Current Turbines Ltd (MCT) Place Bristol, United Kingdom Zip BS34 8PD Sector Marine and Hydrokinetic Product Developer of tidal stream turbine technology for exploiting flowing water in general and tidal streams in particular. Coordinates 51.454513°, -2.58791° 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":51.454513,"lon":-2.58791,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

244

Boundaries and Topological Algorithms  

E-Print Network (OSTI)

This thesis develops a model for the topological structure of situations. In this model, the topological structure of space is altered by the presence or absence of boundaries, such as those at the edges of objects. ...

Fleck, Margaret Morrison

1988-09-01T23:59:59.000Z

245

MARINE MAMMAL SCIENCE, **(*): ****** (*** 2013) 2013 Society for Marine Mammalogy  

E-Print Network (OSTI)

MARINE MAMMAL SCIENCE, **(*): ***­*** (*** 2013) © 2013 Society for Marine Mammalogy DOI: 10 of St Andrews, Scotland KY16 9LZ, United Kingdom; JASON MATTHIOPOULOS, Institute of Biodiversity, Animal dimensions. For marine animals, the third dimension is an important aspect of spa- tial ecology. We used dive

Thomas, Len

246

The Importance of Marine Biodiversity  

Science Journals Connector (OSTI)

The study of marine biodiversity is timely and fundamental for a number of reasons (CBD, Global Biodiversity Outlook 3, 2010). Marine biodiversity plays a key role through ecosystem services ... applied research....

Philippe Goulletquer; Philippe Gros; Gilles Boeuf…

2014-01-01T23:59:59.000Z

247

Terrestrial magma ocean solidification and formation of a candidate D" layer  

E-Print Network (OSTI)

In this thesis we investigate the solidification of early magma oceans on the Earth and the formation of a deep dense layer at the core-mantle boundary. We also study the concentrations and densities of the last layers of ...

Springmann, Alessondra

2011-01-01T23:59:59.000Z

248

IMPACT OF BOUNDARY-LAYER CUTTING ON FREE-SURFACE  

E-Print Network (OSTI)

issue into air at atmospheric pressure Working fluids: water and ethanol #12;11 Surface Breakup Efficiency Factor · Radial droplet velocity relative to jet surface · Surface breakup efficiency factor Gives area of liquid surface · Efficiency factor correlation (valid for Wed = 235­270,000) L mass flux

California at San Diego, University of

249

Experimental and theoretical study of turbulent oscillatory boundary layers  

E-Print Network (OSTI)

Sediment transport is of crucial importance to engineering projects in coastal regions, so it is of primary interest in coastal engineering. The driving forces for sediment transport are mostly determined by the hydrodynamics ...

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

2013-01-01T23:59:59.000Z

250

Interaction between surface and atmosphere in a convective boundary layer /  

E-Print Network (OSTI)

II.4) to measure vertical profiles of wind speed, direction,a larger vertical gradient of horizontal wind-speed in theintense vertical mixing, resulting in constant wind speed,

Garai, Anirban

2013-01-01T23:59:59.000Z

251

BOUNDARY LAYER CONTROL IN PIPES THROUGH STRONG INJECTION  

E-Print Network (OSTI)

normal-injection model. y Coal gasification gas mixture ,ZUSAMMENFASSUNG) In coal gasification, oxidation andthan that in the coal gasification mixture. Outside the

Yeung, William Chor Chun

2014-01-01T23:59:59.000Z

252

DIFFUSION OF A CHEMICAL SPECIES THROUGH A VISCOUS BOUNDARY LAYER  

E-Print Network (OSTI)

2.3 Evaluation of a Coal Gasification Atmosphere. . -iv-a highly cor- rosive coal gasification mixture. It is shown2.3 Evaluation of a Coal Gasification Atmosphere The purpose

Keller, J.

2011-01-01T23:59:59.000Z

253

Turbulent boundary-layer control with plasma actuators  

Science Journals Connector (OSTI)

...oscillation. When the non-dimensional...discharge (DBD) plasma actuators in air at atmospheric conditions. 2...corrected for any thermal influence of the plasma based on temperature...2007Airflow control by non-thermal plasma actuatorsJ. Phys...

2011-01-01T23:59:59.000Z

254

Distributed Roughness Receptivity in a Flat Plate Boundary Layer  

E-Print Network (OSTI)

- Distributed Receptivity . . . . . 6 2. FACILITY DESCRIPTION - THE KLEBANOFF–SARIC WIND TUNNEL 11 2.1 Test Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.2 Fan and Motor... of this dissertation describes the Klebanoff–Saric Wind Tunnel facility, which was used for this experiment. Section 3 describes the experimental setup (roughness design and the flat plate model) and defines the metrics by which the flow field is decomposed...

Kuester, Matthew Scott

2014-04-18T23:59:59.000Z

255

Thermal boundary layer development in dispersed flow film boiling  

E-Print Network (OSTI)

Dispersed flow film boiling consists of a dispersion of droplets which are carried over a very hot surface by their vapor. This process occurs in cryogenic equipment and wet steam turbines. It is also of interest in the ...

Hull, Lawrence M.

1982-01-01T23:59:59.000Z

256

Boundary layer ingesting inlet design for a silent aircraft  

E-Print Network (OSTI)

(cont.) common nacelle, L/D ratios between 2.5 and 3.0, fan face to throat area ratios above 1.06, and offsets lower than 11%. Curvature ahead of the inlet should be avoided as well as bifurcations inside the duct. Inlet ...

Freuler, Patrick N., 1980-

2005-01-01T23:59:59.000Z

257

Computation of Hypersonic Double Wedge Shock / Boundary Layer Interaction  

E-Print Network (OSTI)

of a Scramjet Demonstrator for Future Space Transportation Systems" a combined numerical as well as experimental

258

Interface modes and their instabilities in accretion disc boundary layers  

Science Journals Connector (OSTI)

......magnetosphere with and low plasma density, while the...terminated at the stellar atmosphere with high density and...systems and 300 Hz for kHz QPOs in the NS systems...uniformly rotating stellar atmosphere. This simplified model...compressible stellar atmosphere truncating the accretion......

David Tsang; Dong Lai

2009-06-11T23:59:59.000Z

259

DIFFUSION OF A CHEMICAL SPECIES THROUGH A VISCOUS BOUNDARY LAYER  

E-Print Network (OSTI)

use an operating coal gasifier will be discussed. ofof the products of the gasifier with H S removed, then theconditions existing in coal gasifiers the con- centration

Keller, J.

2011-01-01T23:59:59.000Z

260

BOUNDARY LAYER CONTROL IN PIPES THROUGH STRONG INJECTION  

E-Print Network (OSTI)

the environment in a gasifier contains hydrogen, water,compo- nents of the gasifier must be corrosion resistant atis used in existing coal gasifiers. Since hydrogen sulfide

Yeung, William Chor Chun

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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

Turbulent flux events in a nearly neutral atmospheric boundary layer  

Science Journals Connector (OSTI)

...Abstract Algorithm Technologies Pvt. LtdHebbal...not suited to handling questions of...event detection procedure; a classification...anemometer (Applied Technologies, Inc., USA...figure 3). This procedure results in a...

2007-01-01T23:59:59.000Z

262

Control of cavity-driven separated boundary layer  

E-Print Network (OSTI)

and D. S. Henningson1 1 KTH Mechanics, S-100 44 Stockholm, Sweden 2 Laboratoire J.A. Dieudonn´e, Parc, like for instances the Tollmien-Schlichting waves on an aeroplane wing (see e.g. H¨ogberg & Henningson, thanks to increasing computational power and the use of Arnoldi method (see Edwards et al. (1994

Hoepffner, JĂ©rĂ´me

263

ccsd00002450, Boundary layers and emitted excitations in  

E-Print Network (OSTI)

and Bose-Einstein condensates of ultra-cold atomic vapor. In the case of super uid 4 He, the NLSE can to be negligible. This is clearly the case in recent experiments [5] that are performed at temperatures below 130 mK

264

Interaction between surface and atmosphere in a convective boundary layer /  

E-Print Network (OSTI)

heat, and thermal conductivity of the ground and grid sizegrid was stretched uniformly to 0.1 m resolution. The heatheat flux) are friction velocity and convective velocity respectively. The grid

Garai, Anirban

2013-01-01T23:59:59.000Z

265

Supersonic turbulent boundary layers with periodic mechanical non-equilibrium  

E-Print Network (OSTI)

. It was documented that proper roughness selection coupled with a sufficiently strong favorable pressure gradient produced regions of �negative� production in the transport of turbulent stress. This led to localized areas of significant turbulence stress...

Ekoto, Isaac Wesley

2007-04-25T23:59:59.000Z

266

Boundary-Layer Meteorology An International Journal of Physical,  

E-Print Network (OSTI)

simulations agree well with observed soundings in temperature, wind speed, and wind direc- tion and their interactions with local-scale processes are analyzed to understand the factors that influence the onset-valley · Numerical simulation · Salt Lake City · Weather Research and Forecasting (WRF) model 1 Introduction

Pu, Zhaoxia

267

Products from Marine Algae  

Science Journals Connector (OSTI)

... from an extensive survey of the literature, on many aspects of the study of marine algae. The chief emphasis is, however, on commercial products derived from ... . The chief emphasis is, however, on commercial products derived from algae, the chemicals themselves, their processes of extraction and utilization in industry and as sources ...

E. M. BURROWS

1970-01-03T23:59:59.000Z

268

Biogeography of Marine Algae  

E-Print Network (OSTI)

Biogeography of Marine Algae David J Garbary, St Francis Xavier University, Antigonish, Nova Scotia and vicariance in establishing distributions and as factors associated with speciation. Since eukaryotic algae. There are many species that are virtually cosmopolitan (e.g. the green alga Enteromorpha intestinalis, the red

269

San Nicolas Marine Science  

E-Print Network (OSTI)

the asphaltum min- ing days to a viable and self-sustaining habitat. Manzanita Village Restoration Project College of Creative Studies 555 465 Housing & Residential Services 411 429LOT 3 LOT 9 LOT 7 LOT 23 LOT 27 Lehmann Concert Hall Multi- Cultural Theater Corwin Pavillion University House Centennial House Marine

California at Santa Barbara, University of

270

Plymouth University Marine Building  

E-Print Network (OSTI)

of the grand challenges of the day: from ocean acidification and climate change, to renewable energy centre for marine energy research, harnesses innovation and helps diversify and drive economic growth partnerships with educational institutions, industry and other maritime organisations. This legacy of world

Miranda, Eduardo Reck

271

Z(N) model of grain-boundary wetting  

Science Journals Connector (OSTI)

Even though van der Waals forces should prevent the wetting of a grain boundary by a liquid at the melting temperature, experiment and simulations indicate an instability in grain-boundary structure in the vicinity of this temperature. We study the structure of analogous boundaries in a Z(N) model in which a region of solid with a given orientation is replaced by a spin in that orientation. Different interfacial behaviors are found for different regions of a model parameter which is related to N. For the value appropriate to grain boundaries, our model suggests that boundaries of a sufficiently large angle should be unstable, not to the intrusion of a layer of liquid, however, but to the intrusion of solid of intermediate orientation. Such an intrusion can occur below the melting temperature.

M. Schick and Wei-Heng Shih

1987-04-01T23:59:59.000Z

272

Turbulent Vertical Kinetic Energy in the Ocean Mixed Layer  

Science Journals Connector (OSTI)

Vertical velocities in the ocean boundary layer were measured for two weeks at an open ocean, wintertime site using neutrally buoyant floats. Simultaneous measurements of the surface meteorology and surface waves showed a large variability in ...

Eric A. D'Asaro

2001-12-01T23:59:59.000Z

273

Superconducting nano-layer coating without insulator  

E-Print Network (OSTI)

The superconducting nano-layer coating without insulator layer is studied. The magnetic-field distribution and the forces acting on a vortex are derived. Using the derived forces, the vortex-penetration field and the lower critical magnetic field can be discussed. The vortex-penetration field is identical with the multilayer coating, but the lower critical magnetic field is not. Forces acting on a vortex from the boundary of two superconductors play an important role in evaluations of the free energy.

Kubo, Takayuki

2014-01-01T23:59:59.000Z

274

International Marine Renewable Energy Conference  

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

The International Marine Renewable Energy Conference (IMREC) offers researchers, technology developers, policy makers, NGOs, and industry representatives the opportunity to discuss financing...

275

Marine and Hydrokinetic Energy Projects  

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

This report covers the Wind and Water Power Technologies Office’s marine and hydrokinetic projects from fiscal years 2008 to 2014.

276

Marine Biodiversity and Climate Change  

Science Journals Connector (OSTI)

Climate change involves shifts in environmental conditions which will affect the distribution and biological performance of species. Global patterns of marine biodiversity are strongly driven by ocean temperature...

Thomas Wernberg; Bayden D. Russell; Mads S. Thomsen…

2014-07-01T23:59:59.000Z

277

Sustainable Marine Energy | Open Energy Information  

Open Energy Info (EERE)

Marine Energy Jump to: navigation, search Name: Sustainable Marine Energy Address: Trinity Wharf, Trinity Road, East Cowes, Place: Isle of Wight, Zip: PO32 6RF Sector: Marine and...

278

Marine biodiversity: patterns, threats and conservation needs  

Science Journals Connector (OSTI)

Marine biodiversity is higher in benthic rather than pelagic ... is high at high latitides. Losses of marine diversity are highest in coastal areas largely ... coastal habitats. The best way to conserve marine di...

John S. Gray

1997-01-01T23:59:59.000Z

279

Boundaries on Spacetimes: An Outline  

E-Print Network (OSTI)

The causal boundary construction of Geroch, Kronheimer, and Penrose has some universal properties of importance for general studies of spacetimes, particularly when equipped with a topology derived from the causal structure. Properties of the causal boundary are detailed for spacetimes with spacelike boundaries, for multi-warped spacetimes, for static spacetimes, and for spacetimes with group actions.

Steven G. Harris

2003-10-15T23:59:59.000Z

280

Topology of the Future Chronological Boundary: Universality for Spacelike Boundaries  

E-Print Network (OSTI)

A method is presented for imputing a topology for any chronological set, i.e., a set with a chronology relation, such as a spacetime or a spacetime with some sort of boundary. This topology is shown to have several good properties, such as replicating the manifold topology for a spacetime and replicating the expected topology for some simple examples of spacetime-with-boundary; it also allows for a complete categorical characterization, in topological categories, of the Future Causal Boundary construction of Geroch, Kronheimer, and Penrose, showing that construction to have a universal property for future-completing chronological sets with spacelike boundaries. Rigidity results are given for any reasonable future completion of a spacetime, in terms of the GKP boundary: In the imputed topology, any such boundary must be homeomorphic to the GKP boundary (if all points have indecomposable pasts) or to a topological quotient of a closely related boundary (if boundaries are spacelike). A large class of warped-product-type spacetimes with spacelike boundaries is examined, calculating the GKP and other possible boundaries, and showing that the imputed topology gives expected results; included among these are the Schwarzschild singularity and those Robertson-Walker singularities which are spacelike.

Steven G. Harris

1999-07-19T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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

National Marine Fisheries Service Maine Department of Marine Resources  

E-Print Network (OSTI)

and Wildlife Service Penobscot Indian Nation Atlantic Salmon Recovery Framework #12;DRAFT ­ 8/16/2010 2August 2010 DRAFT National Marine Fisheries Service Maine Department of Marine Resources U.S. Fish Atlantic Salmon Recovery Framework Table of Contents Background and Justification

282

Preprint of the paper "A Boundary Element Numerical Approach for Substation Grounding in a Two  

E-Print Network (OSTI)

Preprint of the paper "A Boundary Element Numerical Approach for Substation Grounding in a Two://caminos.udc.es/gmni #12;A BOUNDARY ELEMENT NUMERICAL APPROACH FOR SUBSTATION GROUNDING IN A TWO LAYER EARTH STRUCTURE3~na, SPAIN SUMMARY Analysis and design of substation grounding requires computing the distribution

Colominas, Ignasi

283

Gas-surface interaction and boundary conditions for the Boltzmann equation  

E-Print Network (OSTI)

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

Mieussens, Luc

284

Stratigraphic Boundaries | Open Energy Information  

Open Energy Info (EERE)

Stratigraphic Boundaries Stratigraphic Boundaries Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Stratigraphic Boundaries Dictionary.png Stratigraphic Boundaries: No definition has been provided for this term. Add a Definition Controlling Structures List of controlling structures typically associated with geothermal systems: Major Normal Fault Termination of a Major Normal Fault Stepover or Relay Ramp in Normal Fault Zones Apex or Salient of Normal Fault Fault Intersection Accommodation Zone Displacement Transfer Zone Pull-Apart in Strike-Slip Fault Zone Intrusion Margins and Associated Fractures Stratigraphic Boundaries Fissure Swarms Caldera Rim Margins Lithologically Controlled Hydrothermal circulation may occur at the contacts between different lithologies. Examples

285

Marine and Hydrokinetic Energy Research & Development | Department...  

Energy Savers (EERE)

Energy Research & Development Marine and Hydrokinetic Energy Research & Development The Water Power Program's marine and hydrokinetic research and development (R&D) efforts focus...

286

Marine Fuel Oil on a Mixed Base  

Science Journals Connector (OSTI)

Three grades of high–viscosity marine fuel oil are manufactured according to TU 38. ... developing the composition and technology for production of marine fuel oils [1– 4].

S. V. Kotov; A. G. Oltyrev; I. N. Kankaeva…

2001-05-01T23:59:59.000Z

287

Marine & Hydrokinetic Technology Readiness Initiative TIDAL ENERGY...  

Office of Scientific and Technical Information (OSTI)

Marine & Hydrokinetic Technology Readiness Initiative TIDAL ENERGY SYSTEM FOR ON-SHORE POWER GENERATION Marine & Hydrokinetic Technology Readiness Initiative DE-EE0003636 TIDAL...

288

34 Marine Fisheries Review Introduction  

E-Print Network (OSTI)

., Panama City, FL 32408. Travis Ford and Laughlin Siceloff are with the University of New Hampshire, Depart important issue to fisheries managers, fishermen, and the public as there have been a wide range of marine, National Marine Fisheries Service, National Oceanic and Atmospheric Administra- tion, 3500 Delwood Beach Rd

289

Coastal and Marine Resources Centre  

E-Print Network (OSTI)

to develop an Eco-systems Approach to Fisheries Management in Ireland. The Griffith Geomatics for Geo of Ireland, Cork Institute of Technology, the Port of Cork, the Industrial Development Authority, the Marine resources, with a focus on sectors such as ocean energy, marine IT and maritime space observations. Section

Schellekens, Michel P.

290

Ethics and Marine Mammals  

Science Journals Connector (OSTI)

Publisher Summary This chapter focuses on human–dolphin and human–whale encounters for ethical questions that arise when considering that these types of highly visible interactions can be used as illustrations for human encounters with other marine mammals, including the pinnipeds, manatees (Trichechus spp.), and polar bears (Ursus maritimus). Understandably, there is much and growing public interest in these rendezvous. Individuals of these species are sentient beings (capable of experiencing pleasure and pain) and sentience must influence how we interact with them. New scientific data appear that force us to rethink what we know and to revise our stereotypes. For example, spindle cells, which were long thought to exist only in humans and other great apes, have been discovered in humpback whales (Megaptera novaeangliae), fin whales (Balaenoptera physalus), killer whales (Orcinus orca), and sperm whales (Physeter macrocephalus) in the same area of their brains as spindle cells in human brains. This brain region is linked with social organization, empathy, and intuition about the feelings of others, as well as rapid gut reactions. Spindle cells are important in processing emotions. There is also a growing database showing that fish are sentient beings that experience pain and suffering and that dolphins and other cetaceans are highly intelligent and capable of experiencing pleasure and pain and have remarkable social and cognitive skills. Indeed, dolphins and other marine mammals seem to fulfill some criteria of ersonhood in that they are aware of their surroundings, sentient, and may have a sense of self.

Marc Bekoff

2009-01-01T23:59:59.000Z

291

Chemical Composition and Sources of Coastal Marine Aerosol Particles during the 2008 VOCALS-REx Campaign  

SciTech Connect

The chemical composition of aerosol particles (Dp 1.5 ?m) was measured over the southeast Pacific Ocean during the VAMOS (Variability of the American Monsoon Systems) Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-Rex) between 16 October and 15 November 2008 using the US Department of Energy (DOE) G-1 aircraft. The objective of these flights was to gain an understanding of the sources and evolution of these aerosols, and of how they interact with the marine stratus cloud layer that prevails in this region of the globe. Our measurements showed that the marine boundary layer (MBL) aerosol mass was dominated by non-sea-salt SO2?4, followed by Na+, Cl?, Org (total organics), NH+4 , and NO?3 , in decreasing order of importance; CH3SO?3 (MSA), Ca2+, and K+ rarely exceeded their limits of detection. Aerosols were strongly acidic with a NH+4 to SO2?4 equivalents ratio typically < 0.3. Sea-salt aerosol (SSA) particles, represented by NaCl, exhibited Cl? deficits caused by both HNO3 and H2SO4, but for the most part were externally mixed with particles, mainly SO2?4. SSA contributed only a small fraction of the total accumulation mode particle number concentration. It was inferred that all aerosol species (except SSA) were of predominantly continental origin because of their strong land-to-sea concentration gradient. Comparison of relative changes in median values suggests that (1) an oceanic source of NH3 is present between 72° W and 76° W, (2) additional organic aerosols from biomass burns or biogenic precursors were emitted from coastal regions south of 31° S, with possible cloud processing, and (3) free tropospheric (FT) contributions to MBL gas and aerosol concentrations were negligible. The very low levels of CH3SO?3 observed as well as the correlation between SO2?4 and NO?3 (which is thought primarily anthropogenic) suggest a limited contribution of DMS to SO2?4 aerosol production during VOCALS.

Lee, Y.- N.; Springston, S.; Jayne, John T.; Wang, Jian; Hubbe, John M.; Senum, Gunnar I.; Kleinman, Lawrence I.; Daum, Peter H.

2014-05-23T23:59:59.000Z

292

Surface Temperature and Surface-Layer Turbulence in a Convective Boundary Layer  

E-Print Network (OSTI)

The vertical gradient of horizontal wind-speed was estimateda larger vertical gradient of horizontal wind-speed in thewind speed, direction, temperature, humidity up to 20 km with a vertical

Garai, Anirban; Pardyjak, Eric; Steeneveld, Gert-Jan; Kleissl, Jan

2013-01-01T23:59:59.000Z

293

Surface Temperature and Surface-Layer Turbulence in a Convective Boundary Layer  

E-Print Network (OSTI)

are density, specific heat of the soil, and grid size in theThe ground heat-flux G then computed from T g as grid was

Garai, Anirban; Pardyjak, Eric; Steeneveld, Gert-Jan; Kleissl, Jan

2013-01-01T23:59:59.000Z

294

Building biomedical materials layer-by-layer  

E-Print Network (OSTI)

In this materials perspective, the promise of water based layer-by-layer (LbL) assembly as a means of generating drug-releasing surfaces for biomedical applications, from small molecule therapeutics to biologic drugs and ...

Hammond, Paula T.

295

Chapter 14 - Marine Power Generation Technologies  

Science Journals Connector (OSTI)

Abstract There are four ways in which the world’s oceans can provide an energy source for power generation. Marine currents around coastlines, inlets, and estuaries can be exploited with underwater turbines. Ocean waves are also a source of energy that can be tapped using a variety of different devices that convert the oscillating motion of waves into a motion that can be used to provide electricity generation. The world’s oceans, particularly in the tropical regions, are massive solar collectors, absorbing heat that creates a hot layer on the surface of the sea. This hot water can be used to drive a heat engine, with cooling taken from the ocean depths where the temperature remains low. The mixing of fresh and salt water also releases energy, and this too can be tapped in a number of ways to generate electricity. All of these are being developed as means of power generation.

Paul Breeze

2014-01-01T23:59:59.000Z

296

DNA barcoding of stranded marine mammals 5 The use of DNA barcoding to monitor the marine  

E-Print Network (OSTI)

barcoding to monitor the marine mammal biodiversity along the French Atlantic coast. In: Nagy ZT, Backeljau of the monitoring of marine mammal biodiversity. Keywords DNA barcoding, COI, control region, marine mammalsDNA barcoding of stranded marine mammals 5 The use of DNA barcoding to monitor the marine mammal

Paris-Sud XI, Université de

297

Atlas de la Biodiversit Marine du Gabon Marine Biodiversity Atlas for Gabon  

E-Print Network (OSTI)

Atlas de la Biodiversité Marine du Gabon Marine Biodiversity Atlas for Gabon Version 1: Avril 2012, Matthew J Witt #12;Atlas de la Biodiversité Marine du Gabon Marine Biodiversity Atlas for Gabon 1 Introduction Bienvenue à l'atlas Darwin de la Biodiversité Marine du Gabon (version 1; avril 2012). La mission

Exeter, University of

298

Marine biology: the role of accommodation in shaping marine biodiversity  

Science Journals Connector (OSTI)

A review of evidence from two kinds of studies conducted in the marine environment suggests a species relationship not previously ... may have contributed to historical rises of global biodiversity.

John C. Briggs

2010-10-01T23:59:59.000Z

299

MIMOC: A Global Monthly Isopycnal Upper-Ocean Climatology with Mixed Layers* Sunke Schmidtko1,2  

E-Print Network (OSTI)

1 MIMOC: A Global Monthly Isopycnal Upper-Ocean Climatology with Mixed Layers* 1 2 Sunke Schmidtko1 Marine Environmental Laboratory Contribution Number 380520 21 Corresponding Author: Sunke Schmidtko

Johnson, Gregory C.

300

Shafir Civil Marine Engineering | Open Energy Information  

Open Energy Info (EERE)

Shafir Civil Marine Engineering Shafir Civil Marine Engineering Jump to: navigation, search Name Shafir Civil & Marine Engineering Place Israel Sector Services Product Services include infrastructure works, contracting, bridge construction and sewer line construction. References Shafir Civil & Marine Engineering[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Shafir Civil & Marine Engineering is a company located in Israel . References ↑ "Shafir Civil & Marine Engineering" Retrieved from "http://en.openei.org/w/index.php?title=Shafir_Civil_Marine_Engineering&oldid=350808" Categories: Clean Energy Organizations Companies Organizations Stubs What links here

Note: This page contains sample records for the topic "marine boundary layer" 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

Analysis and correlation of volcanic ash in marine sediments from the Peru Margin, Ocean Drilling Program Leg 201: explosive volcanic cycles of the north-central Andes  

E-Print Network (OSTI)

A detailed investigation of cores from three Peru Margin sites drilled during Ocean Drilling Program (ODP) Leg 201 has been conducted to determine the occurrence of volcanic ash layers and ash accumulations within marine sediments along the Peru...

Hart, Shirley Dawn

2007-04-25T23:59:59.000Z

302

Intermittent Turbulence in the Very Stable Ekman Layer  

SciTech Connect

INTERMITTENT TURBULENCE IN THE VERY STABLE EKMAN LAYER This study describes a Direct Numerical Simulation (DNS) of a very stable Ekman layer in which a constant downward heat flux is applied at the lower boundary, thus cooling the fluid above. Numerical experiments were performed in which the strength of the imposed heat flux was varied. For downward heat fluxes above a certain critical value the turbulence becomes intermittent and, as the heat flux increases beyond this value, the flow tends to relaminarize because of the very strong ambient stratification. We adopt Mahrt?s (1999) definition of the very stable boundary layer as a boundary layer in which intermittent, rather than continuous turbulence, is observed. Numerical experiments were used to test various hypothesis of where in ?stability parameter space? the very stable boundary layer is found. These experiments support the findings of Howell and Sun (1999) that the boundary layer will exhibit intermittency and therefore be categorized as ?very stable?, when the stability parameter, z/L, exceeds unity. Another marker for the very stable boundary layer, Derbyshire?s (1990) maximum heat flux criterion, was also examined. Using a case study drawn from the simulations where turbulence intermittency was observed, the mechanism that causes the intermittence was investigated. It was found that patchy turbulence originates from a vigorous inflectional, Ekman-like instability -- a roll cell -- that lifts colder air over warmer air. The resulting convective instability causes an intense burst of turbulence. This turbulence is short-lived because the lifting motion of the roll cell, as well as the roll cell itself, is partially destroyed after the patchy turbulence is generated. Examples of intermittent turbulence obtained from the simulations appear to be consistent with observations of intermittency even though the Reynolds number of the DNS is relatively low (400).

Barnard, James C.

2001-01-05T23:59:59.000Z

303

New Perspectives on Marine Biodiversity  

Science Journals Connector (OSTI)

Marine and terrestrial ecosystems are so fundamentally different ... some aspects that many of the issues concerning biodiversity cannot be interpreted using a single theory ... when it comes to highly biodiverse...

Saleem Mustafa

2010-11-01T23:59:59.000Z

304

A new marine propulsion system  

Science Journals Connector (OSTI)

A new marine propulsion system is proposed. A small liquid sodium ... thruster combined with spray-water thruster works as propulsion. The configuration and characteristics of this system are described. Such a nu...

Wei-shi Han; Tao Liu

2003-06-01T23:59:59.000Z

305

Ecological Genomics of Marine Picocyanobacteria  

Science Journals Connector (OSTI)

...transfer of excitation energy from the phycobilisome...results in increased efficiency of energy transfer from phycobilisomes...nitrogenous compounds by swimming strains of marine Synechococcus...phycobilisome-related energy dissipation in cyanobacteria...

D. J. Scanlan; M. Ostrowski; S. Mazard; A. Dufresne; L. Garczarek; W. R. Hess; A. F. Post; M. Hagemann; I. Paulsen; F. Partensky

2009-06-01T23:59:59.000Z

306

2. System boundaries; Balance equations  

E-Print Network (OSTI)

;5/28 Systems and boundaries /3 An isolated system is a special kind of closed system Pictures: KJ05 Q = heat W Example: an electric hot water heater in a house ­ The electric heater is a closed system ­ The water1/28 2. System boundaries; Balance equations Ron Zevenhoven �bo Akademi University Thermal and flow

Zevenhoven, Ron

307

Sensitivity Analysis for Decision Boundaries  

Science Journals Connector (OSTI)

A novel approach is presented to visualize and analyze decision boundaries for feedforward neural networks. First order sensitivity analysis of the neural network output function with respect to input perturbations is used to visualize the position ... Keywords: decision boundary, feature extraction, feedforward neural network, irrelevant parameters, pruning, sensitivity analysis

A. P. Engelbrecht

1999-12-01T23:59:59.000Z

308

Study of Marine Protected Areas in Australia and in China.  

E-Print Network (OSTI)

??Marine protected areas are recognized as an important approach to conserve marine ecosystems and biodiversity as well as to manage costal and marine resource. This… (more)

Liang, Qun

2009-01-01T23:59:59.000Z

309

Southeast National Marine Renewable Energy Center (FAU) | Department...  

Office of Environmental Management (EM)

Southeast National Marine Renewable Energy Center (FAU) Southeast National Marine Renewable Energy Center (FAU) Southeast National Marine Renewable Energy Center (FAU)...

310

Analytical Framework to Evaluate Emission Control Systems for Marine Engines  

E-Print Network (OSTI)

ports. Emissions from marine engines and fuel sulfur contentuse of high sulfur fuels in marine engines. This researchto lower sulfur fuels such as marine distillate oil (MDO)

Jayaram, Varalakshmi

2010-01-01T23:59:59.000Z

311

Corrosion behavior of weathering steel in marine atmosphere  

Science Journals Connector (OSTI)

The corrosion behavior of weathering steel and carbon steel exposed in marine atmosphere for 4 years were studied by means of regression analysis, rust structure observation, X-ray diffraction, Raman spectrum and electrochemical impedance spectra techniques. The results show that the corrosion procedure of weathering steel is divided into two steps. In the first step, the corrosion rate is higher, while in the second step the corrosion rate is remarkably reduced due to a compact rust layer formed gradually during exposure. The compact rust layer on weathering steel, darkened observed using polarized light, is composed of Cr substitute iron oxyhydroxide. Furthermore, an equivalent circuit is set up to represent the interfaces between rusted steels and 3% NaCl solution, and the rust layer resistances of the steels were deduced from an extrapolation of the electrochemistry impedance spectra to estimate the protective properties.

Q.C Zhang; J.S Wu; J.J Wang; W.L Zheng; J.G Chen; A.B Li

2003-01-01T23:59:59.000Z

312

A general boundary integral approach to elliptical boundary value problems  

Science Journals Connector (OSTI)

Based upon basic principles of continuum theory a unified direct boundary integral representation of three-dimensional elliptical boundary value problems is presented. Within this framework many interesting engineering problems, e.g. elastostatics, manetostatic and heat conduction may be considered. The special analysis of the problem under consideration appears in the fundamental solutions. A general procedure for derivation of fundamental solutions with regard to an effecient numerical realisation of the boundary element method is discussed. In the appendix a FORTRAN IV code concerning the calculation of fundamental solutions in anisotropic elastostatics is presented.

H. Gründemann

1987-01-01T23:59:59.000Z

313

Intermediate layers in the a-Si:H growth processes  

SciTech Connect

The intermediate layers (IL) exist at the boundary between liquid (plasma, gas) and solid phases during production processes of a-Si:H. The IL properties differ from the properties of the boundary regions anomaly. The substance in IL is in a strong nonequilibrium state of the bifurcation or the cascade of bifurcations. The processes in the IL determine the properties and the structure of the material being produced.

Aivazov, A.A.; Bodyagin, N.V. [Moscow Inst. of Electronic Technology (Russian Federation); Vikhrov, S.P. [Radiotechnical Academy, Ryazan (Russian Federation). CR Faculty

1996-12-31T23:59:59.000Z

314

Flow boundary conditions for chain-end adsorbing polymer blends  

E-Print Network (OSTI)

Using the phenol-terminated polycarbonate blend as an example, we demonstrate that the hydrodynamic boundary conditions for a flow of an adsorbing polymer melt are extremely sensitive to the structure of the epitaxial layer. Under shear, the adsorbed parts (chain ends) of the polymer melt move along the equipotential lines of the surface potential whereas the adsorbed additives serve as the surface defects. In response to the increase of the number of the adsorbed additives the surface layer becomes thinner and solidifies. This results in a gradual transition from the slip to the no-slip boundary condition for the melt flow, with a non-monotonic dependence of the slip length on the surface concentration of the adsorbed ends.

X. Zhou; D. Andrienko; L. Delle Site; K. Kremer

2005-07-18T23:59:59.000Z

315

In situ measurement of transverse isotropy in shallow-water marine sediments  

Science Journals Connector (OSTI)

......almost all marine sediments anisotropic, the form of anisotropy being...refraction profiles. We use an anisotropic reflectivity program to produce...wave propagation in layered anisotropic media, J. geophys. Res...1984. Velocity anisotropy of shales and depth estimation in the......

Patricia A. Berge; Subhashis Mallick; Gerard J. Fryer; Noël Barstow; Jerry A. Carter; George H. Sutton; John I. Ewing

1991-02-01T23:59:59.000Z

316

Special Section --Marine Controlled-Source Electromagnetic Methods A Bayesian model for gas saturation estimation  

E-Print Network (OSTI)

Special Section -- Marine Controlled-Source Electromagnetic Methods A Bayesian model for gas Vasco1 , Yoram Rubin2 , and Zhangshuan Hou2 ABSTRACT We develop a Bayesian model to jointly invert reservoir model. We consid- er the porosity and fluid saturation of each layer in the reservoir, the bulk

Chen, Jinsong

317

Marin County, California: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Marin County, California: Energy Resources Marin County, California: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 38.083403°, -122.7633036° 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":38.083403,"lon":-122.7633036,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

318

Theory of Grain Boundary Diffusion  

Science Journals Connector (OSTI)

The previously proposed dependence of the structure of grain boundaries upon the angle of disorientation of the two grains is used as a basis of a quantitative consideration of diffusion along grain boundaries and in particular of the apparent activation energies. At small angles in the dislocation range the diffusion is controlled by volume diffusion mechanism. At high angles near 45° the model of a uniform grain boundary is applicable. In the intermediate range an array of rod-like areas of distorted lattice leads to low or even negative apparent activation energies. The theory is in good agreement with experiment.

R. Smoluchowski

1952-08-01T23:59:59.000Z

319

MARINE BIODIVERSITY AND CLIMATE CHANGE (MARCLIM) PHASE 2 REPORT  

E-Print Network (OSTI)

MARINE BIODIVERSITY AND CLIMATE CHANGE (MARCLIM) PHASE 2 REPORT SEPTEMBER 2001 - APRIL 2002.................................................................................................. 12 Climate change and its implications for marine biodiversity (Modules 1 & 2 THE MARINE BIOLOGICAL ASSOCIATION IN PARTNERSHIP WITH PLYMOUTH MARINE LABORATORY, SCOTTISH ASSOCIATION

Power, Anne Marie

320

Review Paper. Matching marine reserve design to reserve objectives  

Science Journals Connector (OSTI)

...resource management|biodiversity conservation|marine protected | Matching marine...Getting to the bottom of marine biodiversity: sedimentary habitats...approach to conserving marine biodiversity. Conserv. Biol. 14...

2003-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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

Earth's Core Hottest Layer  

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

Earth's Core Hottest Layer Earth's Core Hottest Layer Name: Alfred Status: Grade: 6-8 Location: FL Country: USA Date: Spring 2011 Question: Why is the inner core the hottest layer? How is that possible? Replies: There are two factors causing the center of the Earth hotter than various layers of the Earth's. First, the more dense is the layer. The denser layer, the hotter it will be. In addition, the source of the heating is due to heat produced by nuclear decay. These substances tend to be more dense than lower dense substances. So the source of heat (temperature) is higher, the greater will be the temperature. Having said all that, the reasons are rather more complicated in the "real" Earth. If the inner layers were less dense they would rise (bubble) to the "surface" leaving the inner layers more dense and thus hotter layers.

322

The Method of Boundary Perturbation,  

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

Method of Boundary Perturbation, Method of Boundary Perturbation, and Its Application to Wakefield Calculationst Weiren Chou+ Advanced Photon Source Argonne National Laboratory 9700 S. Cass Ave. Argonne, IL 60439 USA Spring Meeting of The American Physical Society Division of Physics of Beams Washington, D.C. April 16-19, 1990 tWork supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Contract W-31-109-ENG-38. tPresent address: SSC Laboratory, Accelerator Division, MS-I046, 2550 Beckleymeade Ave., Dallas, TX 75237, USA. LS-/~ Boundary Perturbation, and Its Application to Wakefield Calculations ABSTRACT The boundary perturbation method, suggested by Zhang and, independently, by Chatard-Moulin, Cooper, and their colleagues, is employed to the wakefield cal-

323

South Campus Boundary/Landscape  

E-Print Network (OSTI)

South Campus Boundary/Landscape April 18, 2012 #12;#12;7:00 - 7:05 Introductions and Review of the Agenda 7:05 - 7:20 Principles of the South Campus Boundary/Landscape from the Feb 21 Design Charette 7:20 - 7:30 Landscape Examples 7:30 - 7:45 Concepts and Ideas for LeMarchant St. 7:45 - 7:50 Break

Brownstone, Rob

324

Multi-Dimensional Broadband IR Radiative Forcing of Marine Stratocumulus in a Large Eddy Simulation Model  

SciTech Connect

In order to address the interactive and evolutionary nature of the cloud-radiation interaction, we have coupled to a Large Eddy Simulation (LES) model the sophisticated multi-dimensional radiative transfer (MDRT) scheme of Evans (Spherical Harmonics Discrete Ordinate Method; 1998). Because of computational expense, we are at this time only able to run 2D experiments. Preliminary runs consider only the broadband longwave component, in large part because IR cloud top cooling is the significant forcing mechanism for marine stratocumulus. Little difference is noted in the evolution of unbroken stratocumulus between three-hour runs using MDRT and independent pixel approximation (IPA) for 2D domains of 50 km in the horizontal and 1.5 km in the vertical. Local heating rates differ slightly near undulating regions of cloud top, and a slight bias in mean heating rate from 1 to 3 h is present, yet the differences are never strong enough to result in a pronounced evolutionary bias in typical boundary layer metrics (e.g. inversion height, vertical velocity variance, TKE). Longer integration times may eventually produce a physical response to the bias in radiative cooling rates. A low-CCN case, designed to produce significant drizzle and induce cloud breakup does show subtle differences between MDRT and IPA. Over the course of the 6 hour simulations, entrainment is slightly less in the MDRT case, and the transition to the surface-based trade cumulus regime is delayed. Mean cooling rates appear systematically weaker in the MDRT case, indicative of a less energetic PBL and reflected in profiles of vertical velocity variance and TKE.

Mechem, David B.; Ovtchinnikov, Mikhail; Kogan, Y. L.; Davis, Anthony B; Cahalan, Robert F.; Takara, Ezra E.; Ellingson, Robert G.

2002-06-03T23:59:59.000Z

325

Hydrodynamic provinces and oceanic connectivity from a transport network help designing marine reserves  

E-Print Network (OSTI)

Oceanic dispersal and connectivity have been identified as crucial factors for structuring marine populations and designing Marine Protected Areas (MPAs). Focusing on larval dispersal by ocean currents, we propose an approach coupling Lagrangian transport and new tools from Network Theory to characterize marine connectivity in the Mediterranean basin. Larvae of different pelagic durations and seasons are modeled as passive tracers advected in a simulated oceanic surface flow from which a network of connected areas is constructed. Hydrodynamical provinces extracted from this network are delimited by frontiers which match multi-scale oceanographic features. By examining the repeated occurrence of such boundaries, we identify the spatial scales and geographic structures that would control larval dispersal across the entire seascape. Based on these hydrodynamical units, we study novel connectivity metrics for existing reserves. Our results are discussed in the context of ocean biogeography and MPAs design, having...

Rossi, Vincent; López, Cristóbal; Hernández-García, Emilio

2014-01-01T23:59:59.000Z

326

MARINE RECREATIONAL INFORMATION PROGRAM PROJECT REPORT  

E-Print Network (OSTI)

validation procedures in the commercial marine license reporting program (MRIP For-Hire Project) by Hongguang1 MARINE RECREATIONAL INFORMATION PROGRAM PROJECT REPORT Hawaii for-hire pilot study to incorporate

327

Editorial: corals, reefs and marine biodiversity  

Science Journals Connector (OSTI)

This issue of Marine Biodiversity contains a selection of papers that were ... talk or digital object during the session “Biodiversity of Coral Reefs” at the 2nd World Conference on Marine Biodiversity in Aberdee...

Bert W. Hoeksema; Sancia E. T. van der Meij

2013-03-01T23:59:59.000Z

328

Marine Mammal Protection Act | Open Energy Information  

Open Energy Info (EERE)

Mammal Protection Act Mammal Protection Act Jump to: navigation, search Statute Name Marine Mammal Protection Act Year 1972 Url [[File:|160px|link=]] Description References NOAA Overview[1] The Marine Mammal Protection Act (MMPA) was enacted on October 21, 1972. All marine mammals are protected under the MMPA. The MMPA prohibits, with certain exceptions, the "take" of marine mammals in U.S. waters and by U.S. citizens on the high seas, and the importation of marine mammals and marine mammal products into the U.S. Congress passed the Marine Mammal Protection Act of 1972 based on the following findings and policies: Some marine mammal species or stocks may be in danger of extinction or depletion as a result of human activities; These species or stocks must not be permitted to fall below their

329

Actions prioritaires de conservation marine Darwin Darwin Priority Marine Conservation Actions  

E-Print Network (OSTI)

fishing pressure. Key marine biodiversity includes major fishing resources and globally important marine been co-ordinating a UK government funded, Darwin Initiative project for marine biodiversity of Gabon actions needed for the conservation of marine biodiversity in Gabon under the five strategies suggested

Exeter, University of

330

Documenting Belize marine biodiversity, Palomares and Pauly78 DOCUMENTING THE MARINE BIODIVERSITY OF BELIZE  

E-Print Network (OSTI)

Documenting Belize marine biodiversity, Palomares and Pauly78 DOCUMENTING THE MARINE BIODIVERSITY on the marine biodiversity of Belize, including well over 1,000 scientific papers and other documents available not only allow for a near complete inventory of the marine biodiversity of Belize (especially if completed

Pauly, Daniel

331

Seymour Marine Discovery Center at Long Marine Lab 100 Shaffer Road * Santa Cruz, CA 95060  

E-Print Network (OSTI)

Seymour Marine Discovery Center at Long Marine Lab 100 Shaffer Road * Santa Cruz, CA 95060 (831) 459-3800 2014 Endowment Challenge to benefit Seymour Marine Discovery Center SANTA CRUZ, CA Discovery Center at Long Marine Lab 100 Shaffer Road * Santa Cruz, CA 95060 (831) 459-3800 Open

California at Santa Cruz, University of

332

Charge Transport Anisotropy Due to Grain Boundaries in Directionally  

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

Charge Transport Anisotropy Due to Grain Charge Transport Anisotropy Due to Grain Boundaries in Directionally Crystallized Thin Films of Regio-Regular Poly(3-hexylthiophene) Semicrystalline polymers, such as polythiophenes, hold much promise as active layers in printable electronic devices such as photovoltaic cells, sensors, and thin film transistors. As organic semiconductors approach commercialization, there is a need to better understand the relationship between charge transport and microstructure, in particular, to identify the inherent bottlenecks to charge transport. In semicrystalline and polycrystalline materials, charge transport is most likely dominated by grain-boundary effects, although the exact mechanism is not well understood. Unfortunately, grain boundaries in semicrystalline thin films are difficult to characterize: the grains are too small to allow for measurements across individual grain boundaries (as is often done for polycrystalline films of small molecules) and bulk measurements are complicated by the unknown orientation of polymer chains within the grain. To better understand the effect of chain orientation on grain boundaries, we use anisotropic thin films of poly(3-hexylthiophene) (P3HT) - one of the most well-studied polymeric semiconductors, as a tool to study charge transport.

333

Convective heat transfer in a locally heated plane incompressible fluid layer  

Science Journals Connector (OSTI)

The problem of convection in a plane horizontal layer of incompressible fluid with rigid boundaries when the temperature is ... . Together with the wellknown solutions which describe heat transfer for the linear ...

S. N. Aristov; K. G. Shvarts

2013-05-01T23:59:59.000Z

334

A Perfectly Matched Layer Method for the Navier-Stokes equations  

E-Print Network (OSTI)

The Perfectly Matched Layer Method (PML) has found widespread application as a high-accuracy, non-reflecting boundary treatment in many wave propagation simulations. However, in the area of computational fluid dynamics, ...

Whitney, John Peter, 1982-

2006-01-01T23:59:59.000Z

335

Marine One Landing Exercise at Argonne  

SciTech Connect

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

None

2013-03-20T23:59:59.000Z

336

HISTORY OF THE GRICE MARINE LABORATORY  

E-Print Network (OSTI)

combined its extensive marine science library holdings with the holdings of the Marine Resources Research and internet capability. STOP #2 ­ POSTERS IN HALLWAY Please review the posters in the hallways and education. CofC students get the chance to make brief trips on these vessels. The Grice Marine Lab has four

Young, Paul Thomas

337

The Marine Biodiversity and Fisheries Catches of  

E-Print Network (OSTI)

The Marine Biodiversity and Fisheries Catches of the Pitcairn Island Group Palomares, M.L.D., D. Chaitanya, S. Harper, D. Zeller and D. Pauly. 2011. The Marine Biodiversity and Fisheries Catches;#12;THE MARINE BIODIVERSITY AND FISHERIES CATCHES OF THE PITCAIRN ISLAND GROUP M.L.D. Palomares, D

Pauly, Daniel

338

Live birth in Cretaceous marine lizards (mosasauroids)  

Science Journals Connector (OSTI)

...research-article Live birth in Cretaceous marine lizards (mosasauroids) Michael...mosasauroids, a group of Cretaceous marine lizards. This is the only...freeing the rear body region for propulsion (B ttcher 1990). However...al. 1995). As with living marine iguanas (Amblyrhynchus...

2001-01-01T23:59:59.000Z

339

MARINE INSTITUTE OFFICE OF THE REGISTRAR  

E-Print Network (OSTI)

MARINE INSTITUTE OFFICE OF THE REGISTRAR Fisheries and Marine Institute of Memorial University OF $50.00 MUST ACCOMPANY THIS APPLICATION (Fee does not apply to applications for ARPA, GMDSS, Propulsion Plant Simulation, SEN, Dynamic Positioning and Stability) Have you ever applied to the Marine Institute

deYoung, Brad

340

Amounts of Trace Elements in Marine Cephalopods  

Science Journals Connector (OSTI)

......Amounts of Trace Elements in Marine Cephalopods T. Ueda * M. Nakahara...H. Suzuki ** * Division of Marine Radioecology, National Institute...Power Reactor and Nuclear Fuel Development Cooperation, Tokyo...Co and Cs in 5 species of marine cephalopods were determined......

T. Ueda; M. Nakahara; T. Ishii; Y. Suzuki; H. Suzuki

1979-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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.


341

Assessing regional scale predictions of aerosols, marine stratocumulus, and their interactions during VOCALS-REx using WRF-Chem  

SciTech Connect

In the recent chemistry version (v3.3) of the Weather Research and Forecasting (WRF-Chem) model, we have coupled the Morrison double-moment microphysics scheme with interactive aerosols so that full two-way aerosol-cloud interactions are included in simulations. We have used this new WRF-Chem functionality in a study focused on assessing predictions of aerosols, marine stratocumulus clouds, and their interactions over the Southeast Pacific using measurements from the VAMOS Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-REx) and satellite retrievals. This study also serves as a detailed analysis of our WRF-Chem simulations contributed to the VOCALS model Assessment (VOCA) project. The WRF-Chem 31-day (October 15-November 16, 2008) simulation with aerosol-cloud interactions (AERO hereafter) is also compared to a simulation (MET hereafter) with fixed cloud droplet number concentrations assumed by the default in Morrison microphysics scheme with no interactive aerosols. The well-predicted aerosol properties such as number, mass composition, and optical depth lead to significant improvements in many features of the predicted stratocumulus clouds: cloud optical properties and microphysical properties such as cloud top effective radius, cloud water path, and cloud optical thickness, and cloud macrostructure such as cloud depth and cloud base height. These improvements in addition to the aerosol direct and semi-direct effects, in turn, feed back to the prediction of boundary-layer characteristics and energy budgets. Particularly, inclusion of interactive aerosols in AERO strengths temperature and humidity gradients within capping inversion layer and lowers the MBL depth by 150 m from that of the MET simulation. Mean top-of-the-atmosphere outgoing shortwave fluxes, surface latent heat, and surface downwelling longwave fluxes are in better agreement with observations in AERO, compared to the MET simulation. Nevertheless, biases in some of the simulated meteorological quantities (e.g., MBL temperature and humidity over the remote ocean) and aerosol quantities (e.g., overestimations of supermicron sea salt mass) might affect simulated stratocumulus and energy fluxes over the SEP, and require further investigations. Although not perfect, the overall performance of the regional model in simulating mesoscale aerosol-cloud interactions is encouraging and suggests that the inclusion of spatially varying aerosol characteristics is important when simulating marine stratocumulus over the southeastern Pacific.

Yang, Qing; Gustafson, William I.; Fast, Jerome D.; Wang, Hailong; Easter, Richard C.; Morrison, H.; Lee, Y.- N.; Chapman, Elaine G.; Spak, S. N.; Mena-Carrasco, M. A.

2011-12-02T23:59:59.000Z

342

A perfectly matched layer formulation for the nonlinear shallow water equations models: The split  

E-Print Network (OSTI)

In a limited-area numerical weather prediction model, the lateral boundaries are not physical boundaries interest since the early days of numerical weather prediction. Several good reviews are availableA perfectly matched layer formulation for the nonlinear shallow water equations models: The split

Navon, Michael

343

The Distribution of Marine Floras  

Science Journals Connector (OSTI)

... George Murray gives a comparative table, showing the marine floras of the warm Atlantic, Indian Ocean, and the Cape of Good Hope. Preceding the comparison, he says:-" ... being swept by a cold current from the south, bringing with it up to this point at all events such temperate forms as Laminaria, recently recorded from that place. The ...

1893-07-13T23:59:59.000Z

344

Volatile compounds from marine algae  

Science Journals Connector (OSTI)

Volatile compounds from marine algae ... Seasonal Variations of Bromophenols in Brown Algae (Padina arborescens, Sargassum siliquastrum, and Lobophora variegata) Collected in Hong Kong ... Seasonal Variations of Bromophenols in Brown Algae (Padina arborescens, Sargassum siliquastrum, and Lobophora variegata) Collected in Hong Kong ...

Richard E. Moore

1977-02-01T23:59:59.000Z

345

The Progress of Marine Propulsion  

Science Journals Connector (OSTI)

... ships. Inventions, improvements, innovations have followed in rapid succession, and the history of marine engineering presents an endless and bewildering variety of engines and boilers which have been adopted ... so many rival methods of driving ships as they have to-day, each method of propulsion making by its performance or promise some claim to consideration. Modern ...

EDGAR C. SMITH

1929-03-09T23:59:59.000Z

346

Sunnyvale Marine Climate Deep Retrofit  

SciTech Connect

The Alliance for Residential Building Innovation (ARBI) and Allen Gilliland of One Sky Homes collaborated on a marine climate retrofit project designed to meet both Passive House (PH) and Building America (BA) program standards. The scope included sealing, installing wall, roof and floor insulation (previously lacking), replacing windows, upgrading the heating and cooling system, and installing.

German, A.; Siddiqui, A.; Dakin, B.

2014-11-01T23:59:59.000Z

347

Modeling open boundaries in dissipative MHD simulation  

Science Journals Connector (OSTI)

The truncation of large physical domains to concentrate computational resources is necessary or desirable in simulating many natural and man-made plasma phenomena. Three open boundary condition (BC) methods for such domain truncation of dissipative magnetohydrodynamics ... Keywords: Approximate Riemann, Artificial boundary, Calderon method, Dissipative, Lacuna, Lacunae, MHD, Magnetohydrodynamics, Non-reflecting boundary, Nonlinear, Open boundary, hyperbolic-parabolic

E. T. Meier; A. H. Glasser; V. S. Lukin; U. Shumlak

2012-04-01T23:59:59.000Z

348

Marine and Hydrokinetic | Department of Energy  

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

Marine and Hydrokinetic Marine and Hydrokinetic Marine and Hydrokinetic The Water Power Program's marine and hydrokinetic research and development (R&D) efforts focus on advancing technologies that capture energy from the nation's oceans and rivers. Unlike hydropower, marine and hydrokinetics represent an emerging industry with hundreds of potentially viable technologies. The program is therefore leading efforts to prove functionality; evaluate technical and economic viability; and generate cost, performance, and reliability data for a variety of devices. Marine and hydrokinetic energy technologies convert the energy of waves, tides, and river and ocean currents into electricity. The Department of Energy's "Marine and Hydrokinetic 101" video explains how these technologies work and highlights some of the Water Power Program's efforts

349

Identifying Chemicals That Are Planetary Boundary Threats  

Science Journals Connector (OSTI)

Identifying Chemicals That Are Planetary Boundary Threats ... Our point of departure to develop profiles for chemicals that are potential planetary boundary threats is to identify scenarios in which a chemical could fulfill each of the three conditions for being a planetary boundary threat. ... Note that chemicals named as examples do not necessarily represent planetary boundary threats since at least one scenario from each of the three conditions must be fulfilled for a chemical to pose a planetary boundary threat. ...

Matthew MacLeod; Magnus Breitholtz; Ian T. Cousins; Cynthia A. de Wit; Linn M. Persson; Christina Rudén; Michael S. McLachlan

2014-09-02T23:59:59.000Z

350

Layered plasma polymer composite membranes  

DOE Patents (OSTI)

Layered plasma polymer composite fluid separation membranes are disclosed, which comprise alternating selective and permeable layers for a total of at least 2n layers, where n is [>=]2 and is the number of selective layers. 2 figs.

Babcock, W.C.

1994-10-11T23:59:59.000Z

351

Lagrangian Variational Framework for Boundary Value Problems  

E-Print Network (OSTI)

A boundary value problem is commonly associated with constraints imposed on a system at its boundary. We advance here an alternative point of view treating the system as interacting "boundary" and "interior" subsystems. This view is implemented through a Lagrangian framework that allows to account for (i) a variety of forces including dissipative acting at the boundary; (ii) a multitude of features of interactions between the boundary and the interior fields when the boundary fields may differ from the boundary limit of the interior fields; (iii) detailed pictures of the energy distribution and its flow; (iv) linear and nonlinear effects. We provide a number of elucidating examples of the structured boundary and its interactions with the system interior. We also show that the proposed approach covers the well known boundary value problems.

Alexander Figotin; Guillermo Reyes

2014-07-29T23:59:59.000Z

352

Managing across boundaries: identity, differentiation and interaction  

Science Journals Connector (OSTI)

The impact of organisational restructuring on organisational boundaries has become increasingly important, especially because modernisation of work practices within large organisations generates increasing boundary complexity. Psychoanalytic theory offers a means of exploring boundaries and emphasises the importance of boundary in the emergence of an integrated sense of identity. In the UK, restructuring of health services has resulted in changes to organisational, professional and work group boundaries, seemingly, without attention being given to what may constitute a healthy set of boundary relationships. Four interrelated case studies illustrate a variety of organisational relationships and cross-boundary processes in mental health services, and how threats to particular boundaries can lead organisational members to engage in defensive activity. Whilst defences may be healthy for the individual or the organisation, they may generate more problems than they solve. Although the examples given here are highly specific, they may illuminate boundary systems more generally within organisations.

Paula Hyde

2006-01-01T23:59:59.000Z

353

Computer Modeling of Transport of Oxidizing Species in Grain Boundaries during Zirconium Corrosion  

SciTech Connect

Zirconium (Zr) based alloys are widely used as the cladding materials in light-water reactors. The water-side corrosion of these alloys degrades their structural integrity and poses serious safety concerns. During the Zr corrosion process, a thin Zr oxide (ZrO2) layer forms on the alloy surface and serves as a barrier layer for further corrosion. The majority of the oxide has the monoclinic phase. At the transition region between the oxide and the metal, the oxide contains a thin layer of stabilized tetragonal phase. It is found that the texture of the tetragonal layer determines the protectiveness of the oxide for corrosion. The transport of oxidizing species, such as anion defects, cation defects, and electron through the tetragonal oxide layer could be the rate limiting step of the corrosion. The defect diffusion can be affected by the growing stresses and microstructures such as grain boundaries and dislocations. In this work molecular dynamics simulations are used to investigate the anion and cation diffusion in bulk and at grain boundaries in tetragonal ZrO2. The results show that defect diffusion at grain boundaries is complex and the behavior strongly depends on the grain boundary type. For most of the grain boundaries studied the defect diffusion are much slower than in the bulk, implying that grain boundaries may not be fast defect transport paths during corrosion. The connection between the modeling results and published experimental work will also be discussed. This work is funded by the Laboratory Directed Research and Development (LDRD) program at Idaho National Laboratory.

Xian-Ming Bai; Yongfeng Zhang; Michael R. Tonks

2014-06-01T23:59:59.000Z

354

The viscosity structure of the D00 layer of the Earth's mantle inferred  

E-Print Network (OSTI)

The viscosity structure of the D00 layer of the Earth's mantle inferred from the analysis layer Core�mantle boundary Viscosity Maxwell body a b s t r a c t The viscosity structure of the D00-diurnal to 18.6 years tidal deformations combined with model viscosity�depth profiles corresponding to a range

355

Boundary County, Idaho: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Boundary County, Idaho: Energy Resources Boundary County, Idaho: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 48.7987617°, -116.5627065° 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":48.7987617,"lon":-116.5627065,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

356

ABOUT THE JOURNAL Marine Resource Economics publishes creative and scholarly  

E-Print Network (OSTI)

biodiversity, marine and coastal recreation, marine pollution, offshore oil and gas, seabed mining, renewable pollution, coastal and marine recreation, ocean energy resources, coastal climate adaptation, ecosystem-based management, marine biodiversity, and marine transportation. 2014 ADVERTISING RATES Position Rate Specs Full

Mateo, Jill M.

357

Kinetic Alfven double layer formed by electron viscosity  

SciTech Connect

The effect of the electron viscosity on the kinetic Alfven solitary wave is investigated. It is found that small electron viscosity changes the electron motion along the magnetic field producing a boundary layer, and thus that in a low beta electron-ion plasma({beta} Much-Less-Than m{sub e}/m{sub i}), an obliquely propagating kinetic solitary Alfven wave can become a double layer. This double layer can exist in the sub-Alfvenic and super-Alfvenic regimes. The length scale of density drop for this double layer is on the order of that of the conventional kinetic solitary Alfven wave, and thus this double layer can accelerate electrons on a very short length scale.

Woo, M. H.; Ryu, C.-M. [Department of Physics, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of); Choi, C. R. [Department of Physics, Korea Advanced Institute of Science and Technology, Taejon 305-701 (Korea, Republic of)

2012-07-15T23:59:59.000Z

358

The Census of Marine Life—evolution of worldwide marine biodiversity research  

Science Journals Connector (OSTI)

This paper discusses the origin and development of the 10-year Census of Marine Life, describing the way in which a ... was ripe to engage in a large-scale marine biodiversity program incorporating the newest tec...

Vera Alexander; Patricia Miloslavich; Kristen Yarincik

2011-12-01T23:59:59.000Z

359

The World Conference on Marine Biodiversity: current global trends in marine biodiversity research  

Science Journals Connector (OSTI)

This paper contains an analysis of the communications presented at the World Conference on Marine Biodiversity in Valencia, Spain, November 2008. Our ... was to determine the current global trends in marine biodiversity

Patricia Miloslavich; Eduardo Klein

2009-07-01T23:59:59.000Z

360

Resolute Marine Energy Inc | Open Energy Information  

Open Energy Info (EERE)

Resolute Marine Energy Inc Resolute Marine Energy Inc Jump to: navigation, search Name Resolute Marine Energy Inc Address 3 Post Office Square 3rd floor Place Massachusetts Zip 02109-3905 Country United States Sector Marine and Hydrokinetic Product Resolute is a wave-power technology developer operating in Massachusetts. Year founded 2007 Number of employees 12 Phone number 917-626-6790 Website http://www.resolutemarine.com References Resolute Marine Energy LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This company is listed in the Marine and Hydrokinetic Technology Database. This company is involved in the following MHK Projects: Ocean Trials Ver 2 SurgeWEC Ocean Testing 1 This company is involved in the following MHK Technologies: AirWEC SurgeWEC

Note: This page contains sample records for the topic "marine boundary layer" 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

Multiple density layered insulator  

DOE Patents (OSTI)

A multiple density layered insulator for use with a laser is disclosed wh provides at least two different insulation materials for a laser discharge tube, where the two insulation materials have different thermoconductivities. The multiple layer insulation materials provide for improved thermoconductivity capability for improved laser operation.

Alger, Terry W. (Tracy, CA)

1994-01-01T23:59:59.000Z

362

Layering as Optimization Decomposition 3-1 Layering as OptimizationLayering as Optimization  

E-Print Network (OSTI)

1 Layering as Optimization Decomposition 3-1 Layering as OptimizationLayering as Optimization DecompositionDecomposition Layering as Optimization Decomposition 3-2 CONTENTSCONTENTS Introduction (Marta;2 Layering as Optimization Decomposition 3-3 Layering as Optimization Decomposition Introduction By Marta

Fan, Xingzhe

363

Journal of Marine Research. 47, 81-109, 1989 The response of the coastal ocean to strong offshore winds  

E-Print Network (OSTI)

Journal of Marine Research. 47, 81-109, 1989 The response of the coastal ocean to strong offshore the response of the coastal ocean to strong offshore winds: a linear 11/2-layer model, and a nonlinear 11 the wind strengthens there is an ageostrophic current (not Ekman drift) that is directed offshore

364

Multiple layer insulation cover  

DOE Patents (OSTI)

A multiple layer insulation cover for preventing heat loss in, for example, a greenhouse, is disclosed. The cover is comprised of spaced layers of thin foil covered fabric separated from each other by air spaces. The spacing is accomplished by the inflation of spaced air bladders which are integrally formed in the cover and to which the layers of the cover are secured. The bladders are inflated after the cover has been deployed in its intended use to separate the layers of the foil material. The sizes of the material layers are selected to compensate for sagging across the width of the cover so that the desired spacing is uniformly maintained when the cover has been deployed. The bladders are deflated as the cover is stored thereby expediting the storage process and reducing the amount of storage space required.

Farrell, James J. (Livingston Manor, NY); Donohoe, Anthony J. (Ovid, NY)

1981-11-03T23:59:59.000Z

365

Marine & Hydrokinetic Technologies (Fact Sheet) | Department...  

Energy Savers (EERE)

Sheet) Marine & Hydrokinetic Technologies (Fact Sheet) This fact sheet describes the Wind and Water Power Program's current approach to supporting the development and...

366

Marine and Hydrokinetic Resource Assessment and Characterization...  

Energy Savers (EERE)

Characterization Marine and Hydrokinetic Resource Assessment and Characterization The Water Power Program has released reports and maps that assess the resource potential of the...

367

Centenary of Practical Marine Screw Propulsion  

Science Journals Connector (OSTI)

... To mark the centenary of practical marine screw ... screw propulsion, a special exhibit was opened at the Science Museum, South Kensington, on February ...

1937-02-13T23:59:59.000Z

368

Development of Marine Thermoelectric Heat Recovery Systems  

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

Thermoelectric generator prototypes are evaluated in a dedicated hybrid vessel test platform fabricated from an encapsulated lifeboat to optimize performance and reliability for marine industry applications

369

Marine and Hydrokinetic Technology Resources | Department of...  

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

hydrokinetic (MHK) energy technologies convert the energy of waves, tides, and river and ocean currents into electricity. The Department of Energy's "Marine and Hydrokinetic 101"...

370

Marine Hydroelectric Company | Open Energy Information  

Open Energy Info (EERE)

Hydroelectric Company Address: 24040 Camino Del Avion A 107 Place: Monarch Beach Sector: Marine and Hydrokinetic Year Founded: 1983 Phone Number: (949) 361-6474 Website: http:...

371

Marine and Hydrokinetic Technology Development and Testing |...  

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

floating, metal test unit floating in the ocean. Northwest National Marine Renewable Energy Center: Advanced Assessment and Device Testing NNMREC is designing, installing, and...

372

Energy 101: Marine and Hydrokinetic Energy  

SciTech Connect

See how marine and hydrokinetic technologies harness the energy of the ocean's waves, tides, and currents and convert it into electricity to power our homes, buildings and cities.

None

2013-04-29T23:59:59.000Z

373

Energy 101: Marine and Hydrokinetic Energy  

ScienceCinema (OSTI)

See how marine and hydrokinetic technologies harness the energy of the ocean's waves, tides, and currents and convert it into electricity to power our homes, buildings and cities.

None

2014-06-26T23:59:59.000Z

374

Marine and Hydrokinetic Technology (MHK) Instrumentation, Measurement...  

Energy Savers (EERE)

Call: Supporting Research and Testing for MHK Presentation from the 2011 Water Program Peer Review 2014 Water Power Program Peer Review Compiled Presentations: Marine and...

375

Nuvera fuel cells for Fincantieri marine vessels  

Science Journals Connector (OSTI)

US-based Nuvera Fuel Cells is working with Italian shipbuilder Fincantieri on a programme to power luxury marine vessels with advanced hydrogen PEM fuel cell technology.

2013-01-01T23:59:59.000Z

376

Summary Notes Marine and Coastal Faculty Forum  

E-Print Network (OSTI)

, and affecting (climate) change. Ecological adaptation human (economic, social, political) and natural development as a positive PR vehicle. Examine FAU's existing strengths in marine and coastal issues; identify

Fernandez, Eduardo

377

THE RESISTANCE OF MARINE ZOOPLANKTON OF THE ...  

Science Journals Connector (OSTI)

THE RESISTANCE OF MA-RINE ZOOPLANKTON. OF THE CARIBBEAN. AND SOUTH ATLANTIC. TO CHANGES IN SALINITY'. Arthur F. Hopper. Department of

378

Sandia National Laboratories: Marine Energy Technology Symposium  

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

Marine Energy Technology Symposium Wave Energy Resource Characterization at US Test Sites On September 16, 2014, in Computational Modeling & Simulation, Energy, News, News &...

379

Grain boundary loops in graphene  

Science Journals Connector (OSTI)

Topological defects can affect the physical properties of graphene in unexpected ways. Harnessing their influence may lead to enhanced control of both material strength and electrical properties. Here we present a class of topological defects in graphene composed of a rotating sequence of dislocations that close on themselves, forming grain boundary loops that either conserve the number of atoms in the hexagonal lattice or accommodate vacancy or interstitial reconstruction, while leaving no unsatisfied bonds. One grain boundary loop is observed as a “flower” pattern in scanning tunneling microscopy studies of epitaxial graphene grown on SiC(0001). We show that the flower defect has the lowest energy per dislocation core of any known topological defect in graphene, providing a natural explanation for its growth via the coalescence of mobile dislocations.

Eric Cockayne; Gregory M. Rutter; Nathan P. Guisinger; Jason N. Crain; Phillip N. First; Joseph A. Stroscio

2011-05-12T23:59:59.000Z

380

Irradiation Assisted Grain Boundary Segregation in Steels  

SciTech Connect

The understanding of radiation-induced grain boundary segregation (RIS) has considerably improved over the past decade. New models have been introduced and much effort has been devoted to obtaining comprehensive information on segregation from the literature. Analytical techniques have also improved so that chemical analysis of layers 1 nm thick is almost routine. This invited paper will review the major methods used currently for RIS prediction: namely, Rate Theory, Inverse Kirkendall, and Solute Drag approaches. A summary is made of the available data on phosphorus RIS in reactor pressure vessel (RPV) steels. This will be discussed in the light of the predictions of the various models in an effort to show which models are the most reliable and easy to use for forecasting P segregation behaviour in steels. A consequence of RIS in RPV steels is a radiation induced shift in the ductile to brittle transition temperature (DBTT). It will be shown how it is possible to relate radiation-induced P segregation levels to DBTT shift. Examples of this exercise will be given for RPV steels and for ferritic steels being considered for first wall fusion applications. Cr RIS in high alloy stainless steels and associated irradiation-assisted stress corrosion cracking (IASCC) will be briefly discussed. (authors)

Lu, Zheng; Faulkner, Roy G. [IPTME, Loughborough University, Loughborough, Leics (United Kingdom)

2008-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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

EOLSS ADAPTATIONS TO LIFE IN MARINE CAVES PAGE 1 ADAPTATIONS TO LIFE IN MARINE CAVES  

E-Print Network (OSTI)

EOLSS ­ ADAPTATIONS TO LIFE IN MARINE CAVES PAGE 1 ADAPTATIONS TO LIFE IN MARINE CAVES Thomas M. Iliffe, Department of Marine Biology, Texas A&M University at Galveston, USA Renée E. Bishop, Department, biodiversity, ecology, adaptation, evolution, behavior, conservation, endangered species, cave diving

Iliffe, Thomas M.

382

Oregon Sea Grant Marine Education Program at Hatfield Marine Science Center Fish Dissection  

E-Print Network (OSTI)

Oregon Sea Grant Marine Education Program at Hatfield Marine Science Center Fish Dissection The Fish Dissection program at Hatfield Marine Science Center is a 50-minute hands-on program for 4th through 12th grade students. Students will work in small groups as they examine a variety of fish, study

Wright, Dawn Jeannine

383

Market boundaries for coking-coal concentrates  

Science Journals Connector (OSTI)

The construction of geographic and commodity boundaries is considered in relation to the Russian market for coking-coal concentrates. In this market, uniform commodities ... construction of the market boundaries....

V. A. Brodskii

2011-05-01T23:59:59.000Z

384

Solitons induced by boundary conditions  

SciTech Connect

Although soliton phenomena have attracted wide attention since 1965, there are still not enough efforts paid to mixed-boundary - initial-value problems that are important in real physical cases. The main purpose of this thesis is to study carefully the various boundary-induced soliton under different initial conditions. The author states with three sets of nonlinear equations: KdV equations and Boussinesq equations (for water); two-fluid equations for cold-ion plasma. He was interested in four types of problems involved with water solitons: excitation by different time-dependent boundary conditions under different initial conditions; head-on and over-taking collisions; reflection at a wall and the excitation by pure initial conditions. For KdV equations, only cases one and four are conducted. The results from two fully nonlinear KdV and Boussinesq equations are compared, and agree extremely well. The Boussinesq equations permit solition head-on collisions and reflections, studied the first time. The results from take-over collision agree with KdV results. For the ion-acoustic plasma, a set of Boussinesq-type equations was derived from the standard two-fluid equations for the ion-acoustic plasma. It theoretically proves the essential nature of the solitary wave solutions of the cold-ion plasma. The ion acoustic solitons are also obtained by prescribing a potential phi/sub 0/ at one grid point.

Zhou, R.L.

1987-01-01T23:59:59.000Z

385

Atmospheric Boundary SUMMARY: This chapter considers the physics of the lowest portion of the  

E-Print Network (OSTI)

, water the crops and pro- vide a freshwater supply to us on land. Second, turbulent mixing generates and reaches the surface. Land surface, by contrast, is #12;12.1. LOWER ATMOSPHERE 167 opaque, while waterChapter 12 Atmospheric Boundary Layer SUMMARY: This chapter considers the physics of the lowest

Cushman-Roisin, Benoit

386

Multiple Equilibria and Hysteresis of Two Unequal-Transport Western Boundary Currents Colliding at a Gap  

Science Journals Connector (OSTI)

The nonlinear collision of two western boundary currents (WBCs) of Munk thickness LM colliding near a gap of width 2a is studied using a 1.5-layer, reduced-gravity, quasigeostrophic ocean model. The work is a continuation of our recent study on ...

Zheng Wang; Dongliang Yuan

2014-07-01T23:59:59.000Z

387

Diversity and genomics of Antarctic marine micro-organisms  

Science Journals Connector (OSTI)

...Clarke and N. Johnston Diversity and genomics of Antarctic marine micro-organisms...larger scale. Insights from initial genomics studies on both cultivated organisms...marine bacteria|marine microbial genomics|bacterioplankton diversity|Southern...

2007-01-01T23:59:59.000Z

388

The Mediterranean Sea under siege: spatial overlap between marine  

E-Print Network (OSTI)

RESEARCH PAPER The Mediterranean Sea under siege: spatial overlap between marine biodiversity of knowledge exists on individual anthropogenic threats that have an impact on marine biodiversity between marine biodiversity and threats is more pronounced and to assess their spatial overlap

Pauly, Daniel

389

Marine biodiversity–ecosystem functions under uncertain environmental futures  

Science Journals Connector (OSTI)

...Montoya and Dave Raffaelli Marine biodiversity-ecosystem functions under...dredging-implications for marine biodiversity. Annu. Rev. Ecol. Syst...in this Data Supplement: Marine biodiversity-ecosystem processes under...

2010-01-01T23:59:59.000Z

390

Analytical Framework to Evaluate Emission Control Systems for Marine Engines  

E-Print Network (OSTI)

Chapter 5). A modern marine propulsion engine on a ferry/two-stroke low-speed marine propulsion engines operated onstroke low-speed marine propulsion engine. It also assesses

Jayaram, Varalakshmi

2010-01-01T23:59:59.000Z

391

Squall in Chesapeake: Marine Institute Rammed by Junk Charge  

Science Journals Connector (OSTI)

...Squall in Chesapeake: Marine Institute Rammed by Junk...the nation's prominent marine scientists, William J...Virginia Institute of Marine Sciences (VIMS) and...fraudulently" disposed of a diesel engine which belonged to the...

DEBORAH SHAPLEY

1976-09-10T23:59:59.000Z

392

Analytical Framework to Evaluate Emission Control Systems for Marine Engines  

E-Print Network (OSTI)

from a low-speed marine diesel engine. Aerosol Sci. Technol.Emissions from a Marine Diesel Engine at Various LoadNOx emissions by marine diesel engines. Transportation

Jayaram, Varalakshmi

2010-01-01T23:59:59.000Z

393

SLE($?,?$)and Boundary Coulomb Gas  

E-Print Network (OSTI)

We consider the coulomb gas model on the upper half plane with different boundary conditions, namely Drichlet, Neuman and mixed. We related this model to SLE($\\kappa,\\rho$) theories. We derive a set of conditions connecting the total charge of the coulomb gas, the boundary charges, the parameters $\\kappa$ and $\\rho$. Also we study a free fermion theory in presence of a boundary and show with the same methods that it would lead to logarithmic boundary changing operators.

S. Moghimi-Araghi; M. A. Rajabpour; S. Rouhani

2005-08-07T23:59:59.000Z

394

Use of biodiesel in marine fuel formulation: A study of combustion quality  

Science Journals Connector (OSTI)

Abstract The quality of ignition and combustion of blends of soy biodiesel and marine fuels was evaluated. Faced with the increasing implementation of processes for converting heavier oil fractions, the availability of streams to formulate marine fuels has been reduced. In this context, the use of biodiesel is important to minimize problems caused by the retraction in production of these streams and improve marine fuel quality. Since composition and stability properties are of great importance and influence directly the combustion quality, the composition was determined using the SARA analysis by thin layer chromatography and a flame ionization detector and the mixtures' stability evaluation was made by optical scanning. Using the equipment Fuel Combustion Analyzer, mixtures of marine fuels and soy biodiesel were tested, varying the biodiesel content by volume in the mixture at levels up to 10% v/v. The results show that the addition of biofuel to marine fuels, in the evaluated conditions, does not compromise the combustion quality of the bunker oil and, in some cases, had even increased the estimated cetane number, indicating increased quality of ignition and combustion.

Elisia dos Santos Prucole; Ricardo Rodrigues da Cunha Pinto; Maria Letícia Murta Valle

2014-01-01T23:59:59.000Z

395

Human dimensions perspectives on the impacts of coastal zone marine renewable energy  

E-Print Network (OSTI)

marine renewable energy development and production varied.marine renewable energy (MRE) development and production.

Pomeroy, Caroline; Conway, Flaxen; Hall-Arber, Madeleine

2013-01-01T23:59:59.000Z

396

Immersed Boundary Methods for High-Resolution Simulation of Atmospheric Boundary-Layer Flow Over Complex Terrain  

E-Print Network (OSTI)

Wind Energy Association Windpower 2008 Conference, AmericanWind Energy Association Windpower 2006 Conference, American

Lundquist, Katherine Ann

2010-01-01T23:59:59.000Z

397

Immersed Boundary Methods for High-Resolution Simulation of Atmospheric Boundary-Layer Flow Over Complex Terrain  

E-Print Network (OSTI)

in today’s numerical weather prediction models is stillability of a numerical weather prediction model to predictthe context of numerical weather prediction models. The two-

Lundquist, Katherine Ann

2010-01-01T23:59:59.000Z

398

Large-Eddy Simulation of Post-Cold-Frontal Continental Stratocumulus  

E-Print Network (OSTI)

Previous large-eddy simulations (LES) of stratocumulus-topped boundary layers have been exclusively set in marine environments. Boundary layer stratocumulus clouds are also prevalent over the continent but have not been ...

Mechem, David B.; Kogan, Yefim L.; Schultz, David M.

2010-12-01T23:59:59.000Z

399

Marine diesel generator from Yanmar  

SciTech Connect

A diesel generator series now available from Yanmar Diesel Engine Co. is designed to provide low fuel costs, direct burning of heavy fuel oil and long life in marine applications from 320 to 600 kW output. The new 6N18L generator sets are based on a six-cylinder, four-stroke, water-cooled engine (bore 180 x stroke 280 mm), which has rated speeds of 720 and 900 r/min. Compatible with mono-fuel ships, the generator engines are designed for operation on heavy fuels to 700 cSt (50{degree}C). This paper describes briefly the design and innovation of this system.

NONE

1996-03-01T23:59:59.000Z

400

Marine & Hydrokinetic Technologies (Fact Sheet)  

SciTech Connect

This fact sheet describes the U.S. Department of Energy's Water Power Program. The program supports the development of advanced water power devices that capture energy from waves, tides, ocean currents, rivers, streams, and ocean thermal gradients. The program works to promote the development and deployment of these new technologies, known as marine and hydrokinetic technologies, to assess the potential extractable energy from rivers, estuaries, and coastal waters, and to help industry harness this renewable, emissions-free resource to generate environmentally sustainable and cost-effective electricity.

Not Available

2010-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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

Numerical analysis of the scavenge flow and convective heat transfer in large two-stroke marine diesel engines  

Science Journals Connector (OSTI)

Abstract A novel computational fluid dynamics (CFD) model is presented for the study of the scavenging process and convective heat transfer in a large two-stroke low-speed uniflow-scavenged marine diesel engine. The engine is modeled using a fully resolved 12° sector, corresponding to one scavenge port, with cyclic boundaries in the tangential direction. The CFD model is strongly coupled to experiments and effectively provides a high order “interpolation” of the engine processes through the solution of the Reynolds-Averaged Navier–Stokes (RANS) equations subject to boundary conditions obtained through experiments. The imposed experimental data includes time histories of the pressure difference across the engine and the heat release during combustion. The model is validated by a numerical sensitivity analysis and through a comparison of model predictions and experimental data, which shows a good agreement. The results show an effective scavenging and a low convective heat loss in agreement with experimental data for large marine diesel engines.

E. Sigurdsson; K.M. Ingvorsen; M.V. Jensen; S. Mayer; S. Matlok; J.H. Walther

2014-01-01T23:59:59.000Z

402

SMITH, S. V. Phosphorus versus nitrogen limitation in the marine ...  

Science Journals Connector (OSTI)

Feb 29, 1984 ... S. V. Smith. Hawaii Institute of Marine Biology, P.O. Box 1346, Kaneohe 96744. Abstract. Limnological and marine geochemical opinion favors ...

2000-02-13T23:59:59.000Z

403

Genomics in the Discovery and Monitoring of Marine Biodiversity  

Science Journals Connector (OSTI)

Marine biodiversity encompasses a range of hierarchical levels, including ... well as evolutionary potential and resilience, of marine taxa. In the face of accelerating environmental ... becomes increasingly urge...

G. R. Carvalho; S. Creer; Michael J. Allen; F. O. Costa…

2010-01-01T23:59:59.000Z

404

MARINE KELP: ENERGY RESOURCE IN THE COASTAL ZONE  

E-Print Network (OSTI)

J. , 1979, Marine Biomass Energy Project, Marine Technologythe proponents of a biomass energy system should start earlyof Symposium on Energy from Biomass and Wastes, Washington,

Ritschard, Ronald L.

2014-01-01T23:59:59.000Z

405

Upcoming Funding Opportunity for Competitive Marine and Hydrokinetic...  

Energy Savers (EERE)

for Competitive Marine and Hydrokinetic (MHK) Demonstrations at the Navy's Wave Energy Test Site (WETS) Upcoming Funding Opportunity for Competitive Marine and Hydrokinetic (MHK)...

406

2013 Federal Energy and Water Management Award Winner Marine...  

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

Marine Corps Recruit San Diego 2013 Federal Energy and Water Management Award Winner Marine Corps Recruit San Diego fewm13usmcmcdepotsandiegohighres.pdf fewm13usmcmcdepotsandi...

407

Harboring Pollution: Air Quality Impacts of Marine Ports | Department...  

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

Harboring Pollution: Air Quality Impacts of Marine Ports Harboring Pollution: Air Quality Impacts of Marine Ports 2004 Diesel Engine Emissions Reduction (DEER) Conference...

408

Marine Algae of the Solomon Islands  

Science Journals Connector (OSTI)

10 September 1970 research-article Marine Algae of the Solomon Islands H. B. S. Womersley A. Bailey An account is given of the benthic marine algae (and sea grasses) collected on the 1965 Royal Society Expedition to the Solomon Islands...

1970-01-01T23:59:59.000Z

409

Hopping Hotspots: Global Shifts in Marine Biodiversity  

E-Print Network (OSTI)

Hopping Hotspots: Global Shifts in Marine Biodiversity W. Renema,1,4 * D. R. Bellwood,2 J. C. Braga species diversity are a prominent feature of modern global biodiversity patterns. Fossil and molecular evidence is starting to reveal the history of these hotspots. There have been at least three marine

Bermingham, Eldredge

410

Cover: Mariner 9 spacecraft. JET PROPULSION  

E-Print Network (OSTI)

#12;Cover: Mariner 9 spacecraft. #12;JET PROPULSION LABORATORY 1971 ANNUAL REPORT A descrtptlon Jet Propulsion Laboratory CALIFORNIA INSTITUTE OF TECHNOLOGY 4800 OAK GROVE DRIVE PASADENA, CALIFORNIA 91103 #12;#12;DIRECTOR'S MESSAGE The successful orbiting of Mariner 9 around the planet Mars

Waliser, Duane E.

411

The Gossple Anonymous Social Network Marin Bertier  

E-Print Network (OSTI)

The Gossple Anonymous Social Network Marin Bertier INSA de Rennes, France marin.bertier.frey@irisa.fr Davide Frey INRIA Rennes, France davide.frey@irisa.fr Rachid Guerraoui EPFL, Switzerland rachid (2010)" #12;Daycare [babysitter: 500] Jonathan Coe novels [British authors, novels] Alice John Teaching

Paris-Sud XI, Université de

412

Marine Fisheries Review Vol. 35, NO. 9  

E-Print Network (OSTI)

Marine Fisheries Review Vol. 35, NO. 9 September 1973 CONTENTS Articles 1 The Future Wallace IS Effects of an Artificial Habi tat on the Marine Sport Fishery and Economy of Murrells Inlet. South Carolina. Che ter C. Buchanan 22 Fuel Shortages and the Fisherman, Joseph P ileggi 26 Shrimp

413

Structured luminescence conversion layer  

DOE Patents (OSTI)

An apparatus device such as a light source is disclosed which has an OLED device and a structured luminescence conversion layer deposited on the substrate or transparent electrode of said OLED device and on the exterior of said OLED device. The structured luminescence conversion layer contains regions such as color-changing and non-color-changing regions with particular shapes arranged in a particular pattern.

Berben, Dirk; Antoniadis, Homer; Jermann, Frank; Krummacher, Benjamin Claus; Von Malm, Norwin; Zachau, Martin

2012-12-11T23:59:59.000Z

414

Marine and Hydrokinetic Resources | Open Energy Information  

Open Energy Info (EERE)

Marine and Hydrokinetic Resources Marine and Hydrokinetic Resources Jump to: navigation, search << Return to the MHK database homepage Contents 1 Marine and Hydrokinetic Resource Assessment and Characterization 2 Current/Tidal/Riverine 3 Wave 4 Ocean Thermal Energy Conversion (OTEC) Marine and Hydrokinetic Resource Assessment and Characterization To find out more about Marine and Hydrokinetic Resource Assessment and Characterization click on this link. Current/Tidal/Riverine Tile Current.jpg To find out more about Tidal Energy click on this link and for Current Energy this link. Wave Wave 02.jpg To find out more about Wave Energy click on this link. Ocean Thermal Energy Conversion (OTEC) Ocean Thermo 04.jpg To find out more about OTEC Energy click on this link. << Return to the MHK database homepage

415

Marine and Hydrokinetic Resources | Open Energy Information  

Open Energy Info (EERE)

Marine and Hydrokinetic Resources Marine and Hydrokinetic Resources (Redirected from Wave) Jump to: navigation, search << Return to the MHK database homepage Contents 1 Marine and Hydrokinetic Resource Assessment and Characterization 2 Current/Tidal/Riverine 3 Wave 4 Ocean Thermal Energy Conversion (OTEC) Marine and Hydrokinetic Resource Assessment and Characterization To find out more about Marine and Hydrokinetic Resource Assessment and Characterization click on this link. Current/Tidal/Riverine Tile Current.jpg To find out more about Tidal Energy click on this link and for Current Energy this link. Wave Wave 02.jpg To find out more about Wave Energy click on this link. Ocean Thermal Energy Conversion (OTEC) Ocean Thermo 04.jpg To find out more about OTEC Energy click on this link. << Return to the MHK database homepage

416

Universality of the Future Chronological Boundary  

E-Print Network (OSTI)

The purpose of this note is to establish, in a categorical manner, the universality of the Geroch-Kronheimer-Penrose causal boundary when considering the types of causal structures that may profitably be put on any sort of boundary for a spacetime. Actually, this can only be done for the future causal boundary (or the past causal boundary) separately; furthermore, only the chronology relation, not the causality relation, is considered, and the GKP topology is eschewed. The final result is that there is a unique map, with the proper causal properties, from the future causal boundary of a spacetime onto any ``reasonable" boundary which supports some sort of chronological structure and which purports to consist of a future completion of the spacetime. Furthermore, the future causal boundary construction is categorically unique in this regard.

Steven G. Harris

1997-04-04T23:59:59.000Z

417

Geometric Boundary Data for the Gravitational Field  

E-Print Network (OSTI)

An outstanding issue in the treatment of boundaries in general relativity is the lack of a local geometric interpretation of the necessary boundary data. For the Cauchy problem, the initial data is supplied by the 3-metric and extrinsic curvature of the initial Cauchy hypersurface.. This Cauchy data determines a solution to Einstein's equations which is unique up to a diffeomorphism. Here, we show how three pieces of boundary data, which are associated locally with the geometry of the boundary, likewise determine a solution of the initial-boundary value problem which is unique up to a diffeomorphism. One piece of this data, constructed from the extrinsic curvature of the boundary, determines the dynamical evolution of the boundary. The other two pieces constitute a conformal class of rank-2, positive definite metrics, which represent the two gravitational degrees of freedom.

H-O. Kreiss; J. Winicour

2014-02-25T23:59:59.000Z

418

Redundant marine engine control system  

SciTech Connect

An electro-mechanical engine control system is described for the shift and throttle functions of marine engines which comprises an electronically-controlled mechanical servo control means coupleable to the shift and throttle functions of a marine engine; a manually-operable ship-board operator engine shift and throttle control means; and an electro-mechanical transfer means coupled to the operator control means and to the servo control means for transferring operator shift and throttle settings to the servo control means, the transfer means being both electronically and mechanically coupled to the servo control means and being constructed and arranged whereby the transfer means will mechanically actuate the servo control means in the absence of electrical power and will electronically actuate the servo control means when electrical power is applied to the servo control means; the transfer means including coupling means preferentially electrically-coupling the operator control means to the servo control means, the coupling means being so constructed and arranged to automatically mechanically-couple the operator control means to the servo control means in the event of electrical power failure and to automatically electrically-couple the operator control means to the servo control means when electrical power is restored.

Burkenpas, R.W.

1993-06-29T23:59:59.000Z

419

Ecotoxicology of tropical marine ecosystems  

SciTech Connect

The negative effects of chemical contaminants on tropical marine ecosystems are of increasing concern as human populations expand adjacent to these communities. Watershed streams and ground water carry a variety of chemicals from agricultural, industrial, and domestic activities, while winds and currents transport pollutants from atmospheric and oceanic sources to these coastal ecosystems. The implications of the limited information available on impacts of chemical stressors on mangrove forests, seagrass meadows, and coral reefs are discussed in the context of ecosystem management and ecological risk assessment. Three classes of pollutants have received attention: heavy metals, petroleum, and synthetic organics. Heavy metals have been detected in all three ecosystems, causing physiological stress, reduced reproductive success, and outright mortality in associated invertebrates and fishes. Oil spills have been responsible for the destruction of entire coastal shallow-water communities, with recovery requiring years. Herbicides are particularly detrimental to mangroves and seagrasses and adversely affect the animal-algal symbioses in corals. Pesticides interfere with chemical cues responsible for key biological processes, including reproduction and recruitment of a variety of organisms. Information is lacking with regard to long-term recovery, indicator species, and biomarkers for tropical communities. Critical areas that are beginning to be addressed include the development of appropriate benchmarks for risk assessment, baseline monitoring criteria, and effective management strategies to protect tropical marine ecosystems in the face of mounting anthropogenic disturbance.

Peters, E.C. [Tetra Tech, Inc., Fairfax, VA (United States); Gassman, N.J.; Firman, J.C. [Univ. of Miami, FL (United States). Rosenstiel School of Marine and Atmospheric Science; Richmond, R.H. [Univ. of Guam, Mangilao (Guam). Marine Lab.; Power, E.A. [EVS Environment Consultants, Ltd., North Vancouver, British Columbia (Canada)

1997-01-01T23:59:59.000Z

420

Ecotoxicology of arsenic in the marine environment  

SciTech Connect

Arsenic has a complex marine biogeochemistry that has important implications for its toxicity to marine organisms and their consumers. The average concentration of total arsenic in the ocean is about 1.7 {micro}g/L, about two orders of magnitude higher than the US Environmental Protection Agency`s human health criterion value of 0.0175 {micro}g/L. The dominant form of arsenic in oxygenated marine and brackish waters in arsenate (As V). The more toxic and potentially carcinogenic arsenite (As III) rarely accounts for more than 20% of total arsenic in seawater. Uncontaminated marine sediments contain from 5 to about 40 {micro}g/g dry weight total arsenic. Arsenate dominates in oxidized sediments and is associated primarily with iron oxyhydroxides. In reducing marine sediments, arsenate is reduced to arsenite and is associated primarily with sulfide minerals. Marine algae accumulate arsenate from seawater, reduce it to arsenite, and then oxidize the arsenite to a large number of organoarsenic compounds. The algae release arsenite, methylarsonic acid, and dimethylarsinic acid to seawater. Dissolved arsenite and arsenate are more toxic to marine phytoplankton than to marine invertebrates and fish. This may be due to the fact that marine animals have a limited ability to bioconcentrate inorganic arsenic from seawater but can bioaccumulate organoarsenic compounds from their food. Tissues of marine invertebrates and fish contain high concentrations of arsenic, usually in the range of about 1 to 100 {micro}g/g dry weight, most of it in the form of organoarsenic compounds, particularly arsenobetaine. Organoarsenic compounds are bioaccumulated by human consumers of seafood products, but the arsenic is excreted rapidly, mostly as organoarsenic compounds. Arsenobetaine, the most abundant organoarsenic compound in seafoods, is not toxic or carcinogenic to mammals. Little of the organoarsenic accumulated by humans from seafood is converted to toxic inorganic arsenite.

Neff, J.M. [Battelle Ocean Sciences Lab., Duxbury, MA (United States)

1997-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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

Layered electrode for electrochemical cells  

DOE Patents (OSTI)

There is provided an electrode structure comprising a current collector sheet and first and second layers of electrode material. Together, the layers improve catalyst utilization and water management.

Swathirajan, Swathy (West Bloomfield, MI); Mikhail, Youssef M. (Sterling Heights, MI)

2001-01-01T23:59:59.000Z

422

Dissipative expansion chambers with two concentric layers of fibrous material  

Science Journals Connector (OSTI)

The acoustic performance of a dissipative expansion chamber lined with two concentric, annular layers of fibrous material with different resistances is investigated. A two-dimensional analytical approach is used to determine the transmission loss of this dissipative silencer. From the boundary conditions at the rigid wall, and the interfaces between the fibre layers and the central airway, the characteristic function and thus eigenvalues and eigenfunctions for sound propagation in the dissipative chamber are obtained, leading to transmission loss through application of pressure and velocity matching. The effects of geometry and fibre properties on the acoustic attenuation are also discussed.

A. Selamet; M.B. Xu; I.J. Lee; N.T. Huff

2005-01-01T23:59:59.000Z

423

Northwest National Marine Renewable Energy Center | Open Energy Information  

Open Energy Info (EERE)

Renewable Energy Center Renewable Energy Center Jump to: navigation, search Name Northwest National Marine Renewable Energy Center Address 4000 15th Ave Place Seattle, Washington Zip 98105 Region Pacific Northwest Area Coordinates 47.6553525°, -122.3120605° 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":47.6553525,"lon":-122.3120605,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

424

Resolution of reservoir scale electrical anisotropy from marine CSEM data  

SciTech Connect

A combination of 1D and 3D forward and inverse solutions is used to quantify the sensitivity and resolution of conventional controlled source electromagnetic (CSEM) data collected using a horizontal electric dipole source to transverse electrical anisotropy located in a deep-water exploration reservoir target. Since strongly anisotropic shale layers have a vertical resistivity that can be comparable to many reservoirs, we examine how CSEM can discriminate confounding shale layers through their characteristically lower horizontal resistivity. Forward modeling demonstrates that the sensitivity to reservoir level anisotropy is very low compared to the sensitivity to isotropic reservoirs, especially when the reservoir is deeper than about 2 km below the seabed. However, for 1D models where the number of inversion parameters can be fixed to be only a few layers, both vertical and horizontal resistivity of the reservoir can be well resolved using a stochastic inversion. We find that the resolution of horizontal resistivity increases as the horizontal resistivity decreases. We show that this effect is explained by the presence of strong horizontal current density in anisotropic layers with low horizontal resistivity. Conversely, when the reservoir has a vertical to horizontal resistivity ratio of about 10 or less, the current density is vertically polarized and hence has little sensitivity to the horizontal resistivity. Resistivity anisotropy estimates from 3D inversion for 3D targets suggest that resolution of reservoir level anisotropy for 3D targets will require good a priori knowledge of the background sediment conductivity and structural boundaries.

Brown, V.; Hoversten, G.M.; Key, K.; Chen, J.

2011-10-01T23:59:59.000Z

425

A General Model for Designing Networks of Marine Reserves  

E-Print Network (OSTI)

. Networks of marine reserves can be an im- portant tool for the conservation of marine biodiversity (1A General Model for Designing Networks of Marine Reserves Enric Sala,1 * Octavio Aburto-Oropeza,2 effective conservation of marine biodi- versity, especially regarding the appropriate location, size

deYoung, Brad

426

Volume 20 Number 3 2004 THE JOURNAL OF MARINE EDUCATION  

E-Print Network (OSTI)

Volume 20 · Number 3 · 2004 THE JOURNAL OF MARINE EDUCATION 2 MARINE PROTECTED AREAS MARINE, areas were set aside for scientific research (e.g., Friday Harbor Laboratory's Marine Biological.g., replenishing fish stocks); maintenance of biodiversity; research and education; preservation of cultural

Coble, Theresa G.

427

Research Focus Marine ecology warms up to theory  

E-Print Network (OSTI)

in marine biodiversity and conservation, as well as to understand the response of marine organisms]. Marine biodiversity research lags behind that on land, with only 10% of overall biodiversity research devoted to marine biodiversity [2] and exhibits a general neglect of developments in general ecological

Bruno, John F.

428

MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser  

E-Print Network (OSTI)

Marine biodiversity and ecosystem function: empirical approaches and future research needs Idea .............................. 263­271 S. Naeem Expanding scales in biodiversity-based research: challenges and solutions for marineMARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 311: 175­178, 2006 Published April 13 Marine

Pierce, Graham

429

Influence of alloying elements on corrosion resistance of low alloy steels in marine environment  

SciTech Connect

Most area of the earth is ocean. Therefore, exploitation of marine resources and utilization of marine space rapidly increase in recent years. Most of marine structures, such as wharfs, oil drilling platforms, coastal bridges, airports, etc. are mainly constructed by steel. It is therefore very important to develop marine corrosion resistant steels that do not require protection and are inexpensive. In this study, a series of low alloy steels were prepared by the method of experimental design as well as conventional design to study the effects of alloying elements on the marine corrosion resistance, under consideration of the requirement of mechanical properties. All steels were cyclically dipped to synthetic sea water in the laboratory for 7 weeks or exposed in the Taichung Harbor for more than 4 years. Both test results show similar tendency of the effects of alloying elements, but the effects of fouling on pitting were only observed in the latter. Addition of phosphorus and copper can improve the general corrosion resistance in atmospheric splash zone and titanium has the same effect in sea water. Molybdenum can improve the general corrosion resistance in both splash and tidal zones and pitting resistance in tidal and submerged zones. Due to enrichment of the alloying elements in the rust resulting in development of inner dense rust layer and change of rust composition, the anti-corrosion ability of most designed steels can be enhanced in marine environment. In addition, the corrosion resistance of most tested steels is superior to plain carbon steel (A-36) and weathering steel (Acr-Ten A) in Taichung Harbor.

Wei, F.I. [China Steel Corp., Kaohsiung (Taiwan, Province of China). Steel and Aluminum Research and Development Dept.

1995-09-01T23:59:59.000Z

430

Climate change, scenarios and marine biodiversity conservation  

Science Journals Connector (OSTI)

This paper explores the utility of qualitative scenario approaches to examine the potential impacts of climate change on marine biodiversity conservation on the east coast of Australia. This region is large and diverse, with considerable variation in marine biodiversity and, concomitantly, considerable diversity in the likely impacts from climate change. The results reinforce a number of key points. Engaging with stakeholders in scenario planning provides not only a focus to discuss the future in a disciplined way, but also provides ongoing reference points for contemporary decision making and planning. The paper illustrates how qualitative scenario planning provides opportunities to address the challenges of marine biodiversity conservation in a changing environment.

Marcus Haward; Julie Davidson; Michael Lockwood; Marc Hockings; Lorne Kriwoken; Robyn Allchin

2013-01-01T23:59:59.000Z

431

Ecological Research Division, Marine Research Program  

SciTech Connect

This report presents program summaries of the various projects sponsored during 1979 by the Marine Research Program of the Ecological Research Division. Program areas include the effects of petroleum hydrocarbons on the marine environment; a study of the baseline ecology of a proposed OTEC site near Puerto Rico; the environmental impact of offshore geothermal energy development; the movement of radionuclides through the marine environment; the environmental aspects of power plant cooling systems; and studies of the physical and biological oceangraphy of the continental shelves bordering the United States.

Not Available

1980-05-01T23:59:59.000Z

432

Marine mammals from the Miocene of Panama  

Science Journals Connector (OSTI)

Panama has produced an abundance of Neogene marine fossils both invertebrate (mollusks, corals, microfossils etc.) and vertebrate (fish, land mammals etc.), but marine mammals have not been previously reported. Here we describe a cetacean thoracic vertebra from the late Miocene Tobabe Formation, a partial cetacean rib from the late Miocene Gatun Formation, and a sirenian caudal vertebra and rib fragments from the early Miocene Culebra Formation. These finds suggest that Central America may yet provide additional fossil marine mammal specimens that will help us to understand the evolution, and particularly the biogeography of these groups.

Mark D. Uhen; Anthony G. Coates; Carlos A. Jaramillo; Camilo Montes; Catalina Pimiento; Aldo Rincon; Nikki Strong; Jorge Velez-Juarbe

2010-01-01T23:59:59.000Z

433

Characterization of corrosion products formed on Ni 2.4 wt%–Cu 0.5 wt%–Cr 0.5 wt% weathering steel exposed in marine atmospheres  

Science Journals Connector (OSTI)

Abstract Weathering steel manufactured with high concentrations of copper (0.5 wt%), chromium (0.5 wt%) and nickel (2.4 wt%) was studied with the aim of furthering knowledge on corrosion product characterization and performance in marine environments. Specimens exposed for two years in a rural atmosphere and two marine environments were characterized by optical microscopy, SEM/EDS, XRD and Raman spectroscopy and corrosion rates measured. The main phases found were ferrihydrite, maghemite and goethite in the inner corrosion layer, and lepidocrocite in the outer layer. Cu and Ni were homogeneously distributed while Cr tended to be concentrated in the inner layer.

Heidis Cano; Delphine Neff; Manuel Morcillo; Philippe Dillmann; Iván Diaz; Daniel de la Fuente

2014-01-01T23:59:59.000Z

434

Plasma transport near material boundaries  

SciTech Connect

The fluid theory of two-dimensional (2-d) plasma transport in axisymmetric devices is reviewed. The forces which produce flow across the magnetic field in a collisional plasma are described. These flows may lead to up-down asymmetries in the poloidal rotation and radial fluxes. Emphasis is placed on understanding the conditions under which the known 2-d plasma fluid equations provide a valid description of these processes. Attempts to extend the fluid treatment to less collisional, turbulent plasmas are discussed. A reduction to the 1-d fluid equations used in many computer simulations is possible when sources or boundary conditions provide a large enough radial scale length. The complete 1-d fluid equations are given in the text, and 2-d fluid equations are given in the Appendix.

Singer, C.E.

1985-06-01T23:59:59.000Z

435

Disembodied boundary data for Einstein's equations  

SciTech Connect

A strongly well-posed initial boundary value problem based upon constraint-preserving boundary conditions of the Sommerfeld type has been established for the harmonic formulation of the vacuum Einstein's equations. These Sommerfeld conditions have been previously presented in a four-dimensional geometric form. Here we recast the associated boundary data as three-dimensional tensor fields intrinsic to the boundary. This provides a geometric presentation of the boundary data analogous to the three-dimensional presentation of Cauchy data in terms of three-metric and extrinsic curvature. In particular, diffeomorphisms of the boundary data lead to vacuum spacetimes with isometric geometries. The proof of well-posedness is valid for the harmonic formulation and its generalizations. The Sommerfeld conditions can be directly applied to existing harmonic codes which have been used in simulating binary black holes, thus ensuring boundary stability of the underlying analytic system. The geometric form of the boundary conditions also allows them to be formally applied to any metric formulation of Einstein's equations, although well-posedness of the boundary problem is no longer ensured. We discuss to what extent such a formal application might be implemented in a constraint-preserving manner to 3+1 formulations, such as the Baumgarte-Shapiro-Shibata-Nakamura system which has been highly successful in binary black hole simulation.

Winicour, Jeffrey [Department of Physics and Astronomy University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States); Max-Planck-Institut fuer Gravitationsphysik, Albert-Einstein-Institut, 14476 Golm (Germany)

2009-12-15T23:59:59.000Z

436

Casimir pistons with hybrid boundary conditions  

E-Print Network (OSTI)

The Casimir effect giving rise to an attractive or repulsive force between the configuration boundaries that confine the massless scalar field is reexamined for one to three-dimensional pistons in this paper. Especially, we consider Casimir pistons with hybrid boundary conditions, where the boundary condition on the piston is Neumann and those on other surfaces are Dirichlet. We show that the Casimir force on the piston is always repulsive, in contrast with the same problem where the boundary conditions are Dirichlet on all surfaces.

Xiang-hua Zhai; Xin-zhou Li

2007-04-30T23:59:59.000Z

437

PIA - Savannah River Remediation Accreditation Boundary (SRR...  

Office of Environmental Management (EM)

PIA - Savannah River Nuclear Solution IBARS Srs Site Apps. Accreditation Boundary PIA - WEB Physical Security Major Application Occupational Medical Surveillance System (OMSS)...

438

Two hundred years after a commercial marine turtle shery: the current status of marine turtles nesting in the Cayman Islands  

E-Print Network (OSTI)

Two hundred years after a commercial marine turtle ®shery: the current status of marine turtles, Gina Ebanks-Petrie and Graeme C. Hays Abstract Large populations of marine turtles breed- ing in the Cayman Islands were drastically reduced in the early 1800s. However, marine turtle nesting still occurs

Exeter, University of

439

Gradient zone-boundary control in salt-gradient solar ponds  

DOE Patents (OSTI)

A method and apparatus for suppressing zone boundary migration in a salt gradient solar pond includes extending perforated membranes across the pond at the boundaries, between the convective and non-convective zones, the perforations being small enough in size to prevent individual turbulence disturbances from penetrating the hole, but being large enough to allow easy molecular diffusion of salt thereby preventing the formation of convective zones in the gradient layer. The total area of the perforations is a sizeable fraction of the membrane area to allow sufficient salt diffusion while preventing turbulent entrainment into the gradient zone.

Hull, J.R.

1982-09-29T23:59:59.000Z

440

Reflection of Waterborne acoustic waves from a viscoelastic layer on a rigid hacking with perforations  

Science Journals Connector (OSTI)

The reflection coefficient is calculated for a plane acoustic wave normally incident on a viscoelasticrubber cover layer submerged in water. The rubber layer is mounted on a rigid backing with air?filled cylindrical perforations. Acoustical losses are attributed to motion of the layer over the perforations. This motion is calculated by treating the layer above each perforation as a vibrating circular viscoelastic plate. Different boundary conditions are assumed and in each case the soundreflection coefficient is calculated. The results are compared with the experimental data of R. Lane [Ultrason. 19 28–30 (1981)].

J. Jarzynski

1982-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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

anthropogenic mercury emissions: Topics by E-print Network  

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

marine boundary layer Palmer, Paul 25 MERCURY EMISSIONS FROM A SIMULATED IN-SITU OIL SHALE RETORT University of California eScholarship Repository Summary: Effluents for...

442

E-Print Network 3.0 - aqua modis satellite Sample Search Results  

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

aerosol is tested by ... Source: Waliser, Duane E. - Water and Carbon Cycles Group, Jet Propulsion Laboratory Collection: Geosciences 89 VARIATIONS IN MARINE BOUNDARY LAYER CLOUD...

443

Modeling and inversion of PS-wave moveout asymmetry for tilted TI media: Part 2 --Dipping TTI layer  

E-Print Network (OSTI)

for anisotropic imaging beneath TTI formations and characterization of dipping fracture systems. Mode-converted PS to the anisotropic parameters. In Part 1 Dewangan and Tsvankin, 2006a , we proposed a modi- fication of the PP + PS to the layer boundaries. Dipping shale layers of this type are commonly ob- Manuscript received by the Editor

Tsvankin, Ilya

444

Marine Recreational Information Program | Data.gov  

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

Recreational Information Program Recreational Information Program Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov » Communities » Ocean » Data Marine Recreational Information Program Dataset Summary Description The Marine Recreational Information Program, or MRIP, is the new way NOAA Fisheries is counting and reporting marine recreational catch and effort. It is a customer-driven initiative that will not only produce better estimates, but will do so through a process grounded in the principles of transparency, accountability and engagement. MRIP replaces the Marine Recreational Fisheries Statistics Survey, or MRFSS, which has been in place since the 1970s. Tags {fish,fisheries," catch",angler,surveys,marinas,boats,pelagics,tunas,billfish,sharks,tournament," HMS",landings,tagging,logbooks,"US South Atlantic","Gulf of Mexico",Florida,"Puerto Rico",migratory,registry}

445

Communicating marine reserve science to diverse audiences  

Science Journals Connector (OSTI)

...demonstrate to funders the outreach and education potential for their data; many foundations...nonliterate audiences, although posters and pictorial representations can be tailored...Fisheries Fishes Humans Marine Biology education organization & administration Pacific...

Kirsten Grorud-Colvert; Sarah E. Lester; Satie Airamé; Elizabeth Neeley; Steven D. Gaines

2010-01-01T23:59:59.000Z

446

Current problems in marine biodiversity studies  

Science Journals Connector (OSTI)

This paper deals with a discussion of terminology and six proposed levels of biodiversity. Recent data and estimates were used to ... and taxonomic diversity of terrestrial, freshwater, and marine organisms. Abou...

A. V. Adrianov

447

Marine Biodiversity Conservation and Management in India  

Science Journals Connector (OSTI)

The coastal marine ecosystems play a vital role in India’ ... their natural resources, potential habitats, and wide biodiversity. India has a long coastline of 8...2...which is an important area both for explorat...

P. Nammalwar; V. S. Gowri; S. Satheesh

2013-01-01T23:59:59.000Z

448

Editorial: Arctic marine biodiversity under change  

Science Journals Connector (OSTI)

Marine biodiversity in the Arctic is changing in response...2011). The Arctic region has become warmer in the past three decades (ACIA 2005), and most global climate models indicate a continued, likely accelerate...

Haakon Hop; Tore Haug; Stig Falk-Petersen

2011-09-01T23:59:59.000Z

449

A holistic view of marine regime shifts  

Science Journals Connector (OSTI)

...challenges for ecosystem management: managers confront...Eventually, marine management approaches and tools need to be...Ecosystem Adaptive Management Program. Research...from the Netherlands Science Foundation (NWO...

2015-01-01T23:59:59.000Z

450

Marine Nuclear Propulsion for the United Kingdom  

Science Journals Connector (OSTI)

... the Government in an adjournment debate in the House of Commons on March 21 on marine nuclear ... nuclear propulsion, the Joint Parliamentary Secretary to the Ministry of Transport, Mr. John Hay, said ...

1960-04-09T23:59:59.000Z

451

The biogeochemistry of marine particulate trace metals  

E-Print Network (OSTI)

Marine particles include all living and non-living solid components of seawater, representing an extremely dynamic and chemically diverse mixture of phases. The distributions of these phases are poorly constrained and ...

Ohnemus, Daniel Chester

2014-01-01T23:59:59.000Z

452

Phosphorus physiology of the marine cyanobacterium Trichodesmium  

E-Print Network (OSTI)

Primary producers play a critical role in the oceanic food chain and the global cycling of carbon. The marine diazotroph Trichodesmium is a major contributor to both primary production and nitrogen fixation in the tropical ...

Orchard, Elizabeth Duncan

2010-01-01T23:59:59.000Z

453

Resistance of Marine Bacterioneuston to Solar Radiation  

Science Journals Connector (OSTI)

...of Marine Bacterioneuston to Solar Radiation Helene Agogue Fabien...after exposure to simulated solar radiation. Bacterioneuston...estimate of their screening capacity. Appl. Environ. Microbiol...D. P. 2000. Effects of solar UV-B radiation on aquatic...

Hélčne Agogué; Fabien Joux; Ingrid Obernosterer; Philippe Lebaron

2005-09-01T23:59:59.000Z

454

NOAA Atlas NESDIS 56 RUSSIAN MARINE EXPEDITIONARY  

E-Print Network (OSTI)

NOAA Atlas NESDIS 56 RUSSIAN MARINE EXPEDITIONARY INVESTIGATIONS OF THE WORLD OCEAN Silver Spring International Ocean Atlas and Information Series, Volume 5 NOAA Atlas NESDIS 56 #12;World Data Center for Oceanography, Silver Spring International Ocean Atlas and Information Series

455

Iron and the ecology of marine microbes  

E-Print Network (OSTI)

Iron is a cofactor of a number biochemical reactions that are essential for life. In the marine environment, this micronutrient is a scarce resource that limits processes of global importance such as photosynthesis and ...

Ventouras, Laure-Anne

2013-01-01T23:59:59.000Z

456

Marin County- Wood Stove Replacement Rebate Program  

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

The County of Marin has created a rebate program to encourage homeowners to remove or replace non-EPA certified wood-burning heaters (wood stoves and fireplace inserts) with cleaner burning stoves...

457

marine energy | OpenEI Community  

Open Energy Info (EERE)

marine energy marine energy Home Kch's picture Submitted by Kch(24) Member 9 April, 2013 - 13:30 MHK Cost Breakdown Structure Draft CBS current energy GMREC LCOE levelized cost of energy marine energy MHK ocean energy The generalized Cost Breakdown Structure (CBS) for marine and hydrokinetic (MHK) projects is a hierarchical structure designed to facilitate the collection and organization of lifecycle costs of any type of MHK project, including wave energy converters and current energy convertners. At a high level, the categories in the CBS will be applicable to all projects; at a detailed level, however, the CBS includes many cost categories that will pertain to one project but not others. It is expected that many of the detailed levels of the CBS will be populated with "NA" or left blank.Upload

458

Control System For Cryogenic THD Layering At The National Ignition Facility  

SciTech Connect

The National Ignition Facility (NIF) is the world largest and most energetic laser system for Inertial Confinement Fusion (ICF). In 2010, NIF began ignition experiments using cryogenically cooled targets containing layers of the tritium-hydrogen-deuterium (THD) fuel. The 75 {micro}m thick layer is formed inside of the 2 mm target capsule at temperatures of approximately 18 K. The ICF target designs require sub-micron smoothness of the THD ice layers. Formation of such layers is still an active research area, requiring a flexible control system capable of executing the evolving layering protocols. This task is performed by the Cryogenic Target Subsystem (CTS) of the NIF Integrated Computer Control System (ICCS). The CTS provides cryogenic temperature control with the 1 mK resolution required for beta-layering and for the thermal gradient fill of the capsule. The CTS also includes a 3-axis x-ray radiography engine for phase contrast imaging of the ice layers inside of the plastic and beryllium capsules. In addition to automatic control engines, CTS is integrated with the Matlab interactive programming environment to allow flexibility in experimental layering protocols. The CTS Layering Matlab Toolbox provides the tools for layer image analysis, system characterization and cryogenic control. The CTS Layering Report tool generates qualification metrics of the layers, such as concentricity of the layer and roughness of the growth boundary grooves. The CTS activities are automatically coordinated with other NIF controls in the carefully orchestrated NIF Shot Sequence.

Fedorov, M; Blubaugh, J; Edwards, O; Mauvais, M; Sanchez, R; Wilson, B

2011-03-18T23:59:59.000Z

459

Layered permeable systems  

SciTech Connect

Permeability is a second rank tensor relating flow rate to pressure gradient in a porous medium. If the permeability is a constant times the identity tensor the permeable medium is isotropic; otherwise it is anisotropic. A formalism is presented for the simple calculation of the permeability tensor of a heterogeneous layered system composed of interleaved thin layers of several permeable constituent porous media in the static limit. Corresponding to any cumulative thickness {ital H} of a constituent is an element consisting of scalar {ital H} and a matrix which is {ital H} times a hybrid matrix function of permeability. The calculation of the properties of a medium equivalent to the combination of permeable constituents may then be accomplished by simple addition of the corresponding scalar/matrix elements. Subtraction of an element removes a permeable constituent, providing the means to decompose a permeable medium into many possible sets of permeable constituents, all of which have the same flow properties. A set of layers of a constituent medium in the heterogeneous layered system with permeability of the order of 1{ital h} as {ital h} {r arrow} 0, where {ital h} is that constituent's concentration, acts as a set of infinitely thin channels and is a model for a set of parallel cracks or fractures. Conversely, a set of layers of a given constituent with permeability of the order of {ital h} as {ital h} {r arrow} 0 acts as a set of parallel flow barriers and models a set of parallel, relatively impermeable, interfaces, such as shale stringers or some faults.

Schoenberg, M. (Schlumberger-Doll Research, Ridgefield, CT (US))

1991-02-01T23:59:59.000Z

460

Spatially Resolved Mapping of Electrical Conductivity around Individual Domain (Grain) Boundaries in Graphene  

SciTech Connect

Graphene films can now be produced on the scale of up to meters. However, all large-scale graphene films contain topological defects that can significantly affect the characteristic transport behaviors of graphene. Here, we spatially map the structures and electronic transport near specific domain and grain boundaries in graphene, and evaluate effects of different types of defect on the electronic conductivity in epitaxial graphene grown on SiC and CVD graphene on Cu subsequently transferred to a SiO2 substrate. We use a combined approach with a multi-probe scanning tunneling potentiometry to investigate both structures and transport at individual grain boundaries and domain boundaries that are defined by coalesced grains, surface steps, and changes in layer thickness. It is found that the substrate step on SiC presents a significant potential barrier for electron transport of epitaxial graphene due to the reduced charge transport from the substrate at the step edges, monolayer-bilayer boundaries exhibit a high resistivity that can change depending on directions of the current across the boundary, and the resistivity of grain boundaries changes with the transition width of the disordered region between two adjacent grains in graphene. The detailed understanding of graphene defects will provide the feedback for controlled engineering of defects in large-scale graphene films.

Li, An-Ping [ORNL; Clark, Kendal W [ORNL; Zhang, Xiaoguang [ORNL; Vlassiouk, Ivan V [ORNL; He, Guowei [Carnegie Mellon University (CMU); Feenstra, Randall [Carnegie Mellon University (CMU)

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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

E-Print Network 3.0 - administration national marine Sample Search...  

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

for example... , in conjunction with the Natural Sciences degree. Marine ecotourism or marine ... Source: Wiegner, Tracy N. - Marine Science Department, University of...

462

E-Print Network 3.0 - acque marine costiere Sample Search Results  

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

Teaching; for example... , in conjunction with the Natural Sciences degree. Marine ecotourism or marine ... Source: Wiegner, Tracy N. - Marine Science Department, University...

463

Establishment of High Seas Marine Protected Areas: Towards an Implementing Agreement?.  

E-Print Network (OSTI)

??Although international law requires States to protect the marine environment and conserve marine living resources, human activities are still threatening marine species and its survival.… (more)

Boisvert, Marie-Claude

2009-01-01T23:59:59.000Z

464

Greenhouse Gas Emissions from Aviation and Marine Transportation: Mitigation Potential and Policies  

E-Print Network (OSTI)

oil. Aviation and marine fuels consumed during internationalthan IEA estimates. Marine fuel sales data reported to IEAthe best estimate of marine fuel use (Endresen, Sřrgĺrd et

McCollum, David L; Gould, Gregory; Greene, David L

2010-01-01T23:59:59.000Z

465

Cherokee Clitics: The Word Boundary Problem  

E-Print Network (OSTI)

The problem of identifying Cherokee clitics is complicated by the fact that the prosodic word, marked by the presence of a tonal boundary, may not match the morphological word. Clitics may or may not respect the the word boundary as marked by tone...

Haag, Marcia

1999-01-01T23:59:59.000Z

466

Green's functions for Neumann boundary conditions  

E-Print Network (OSTI)

Green's functions for Neumann boundary conditions have been considered in Math Physics and Electromagnetism textbooks, but special constraints and other properties required for Neumann boundary conditions have generally not been noticed or treated correctly. In this paper, we derive an appropriate Neumann Green's function with these constraints and properties incorporated.

Jerrold Franklin

2012-01-29T23:59:59.000Z

467

Characteristics of sound propagation in shallow water over an elastic seabed with a thin cap-rock layer  

E-Print Network (OSTI)

-rock layer Alec J. Duncan,a) Alexander N. Gavrilov, Robert D. McCauley, and Iain M. Parnum Centre for Marine M. Collis Colorado School of Mines, 1500 Illinois Street, Golden, Colorado 80401 (Received 31 August.1121/1.4809723] PACS number(s): 43.30.Ma, 43.30.Bp [NPC] Pages: 207­215 I. INTRODUCTION Substantial areas

468

MARINE MAMMAL SCIENCE, **(*): ****** (*** 2010) C 2010 by the Society for Marine Mammalogy  

E-Print Network (OSTI)

of Pathology, University of Texas Medical Branch, 301 University Boulevard, Galveston, Texas 77555, U.S.A. HEIDI WHITEHEAD Texas Marine Mammal Stranding Network, 5007 Avenue U, Galveston, Texas 77551, U.S.A. CHRISTOPHER D. MARSHALL Department of Marine Biology, Texas A&M University, 5007 Avenue U, Galveston, Texas

Marshall, Christopher D.

469

Ion transport and structure of layer-by-layer assemblies  

E-Print Network (OSTI)

Layer-by-layer (LbL) films of various architectures were examined as potential solid state electrolytes for electrochemical systems (e.g. batteries and fuel cells). The relationship between materials properties and ion ...

Lutkenhaus, Jodie Lee

2007-01-01T23:59:59.000Z

470

MHK Projects/Contra Rotating Marine Turbine CoRMaT | Open Energy  

Open Energy Info (EERE)

Contra Rotating Marine Turbine CoRMaT Contra Rotating Marine Turbine CoRMaT < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","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":55.6655,"lon":-4.93682,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

471

MHK Projects/Marine Hydrodynamics Laboratory at the University of Michigan  

Open Energy Info (EERE)

Marine Hydrodynamics Laboratory at the University of Michigan Marine Hydrodynamics Laboratory at the University of Michigan < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","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":42.2808,"lon":-83.743,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

472

Atmos. Chem. Phys., 12, 34793492, 2012 www.atmos-chem-phys.net/12/3479/2012/  

E-Print Network (OSTI)

plants and in marine diesel engines. They contain large concentrations of sulphur and different ash marine boundary layer (MBL) stability in summer, leading to higher concen- tration of emitted compounds

Meskhidze, Nicholas

473

Theory of Leakage Preventing Layer  

Science Journals Connector (OSTI)

It is a brand new concept for leakage prevention layer. The practice to place HEPA filter at the terminal is improved when the theory of leakage prevention layer applies, which becomes the core of novel air distr...

Zhonglin Xu

2014-01-01T23:59:59.000Z

474

The role of sustained observations in tracking impacts of environmental change on marine biodiversity and ecosystems  

Science Journals Connector (OSTI)

...of environmental change on marine biodiversity and ecosystems N. Mieszkowska...marine sustained observations . Marine biodiversity currently faces unprecedented...activities have impacted on marine biodiversity. The contributions of sustained...

2014-01-01T23:59:59.000Z

475

A Side of Mercury Not Seen By Mariner 10  

E-Print Network (OSTI)

More than 60,000 images of Mercury were taken at ~29 deg elevation during two sunrises, at 820 nm, and through a 1.35 m diameter off-axis aperture on the SOAR telescope. The sharpest resolve 0.2" (140 km) and cover 190-300 deg longitude -- a swath unseen by the Mariner 10 spacecraft -- at complementary phase angles to previous ground-based optical imagery. Our view is comparable to that of the Moon through weak binoculars. Evident are the large crater Mozart shadowed on the terminator, fresh rayed craters, and other albedo features keyed to topography and radar reflectivity, including the putative huge ``Basin S'' on the limb. Classical bright feature Liguria resolves across the northwest boundary of the Caloris basin into a bright splotch centered on a sharp, 20 km diameter radar crater, and is the brightest feature within a prominent darker ``cap'' (Hermean feature Solitudo Phoenicis) that covers the northern hemisphere between longitudes 140-250 deg. The cap may result from space weathering that darkens via a magnetically enhanced flux of the solar wind, or that reddens low latitudes via high solar insolation.

Gerald Cecil; Dmitry Rashkeev

2007-10-29T23:59:59.000Z

476

Phylogenetic and chemical diversity of marine-derived actinomycetes from Southern California sediments  

E-Print Network (OSTI)

widespread marine sediments. Antonie van Leeuwnhoek 87:continental shelf sediment. Applied and Environmentalcultured from marine sediments. Applied and environmental

Prieto-Davó, Alejandra

2008-01-01T23:59:59.000Z

477

Lattice Boltzmann boundary conditions via singular forces: irregular expansion analysis  

E-Print Network (OSTI)

Lattice Boltzmann boundary conditions via singular forces: irregular expansion analysis. We benchmark the method on lattice Boltzmann flows past a rigid disk, comparing its numerical performances with standard boundary condition approaches. Key words: lattice Boltzmann method, boundary

478

Property:Building/Boundaries | Open Energy Information  

Open Energy Info (EERE)

Boundaries Boundaries Jump to: navigation, search This is a property of type String. Boundaries Pages using the property "Building/Boundaries" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + Several buildings + Sweden Building 05K0002 + Part of a building + Sweden Building 05K0003 + One building + Sweden Building 05K0004 + One building + Sweden Building 05K0005 + One building + Sweden Building 05K0006 + Several buildings + Sweden Building 05K0007 + One building + Sweden Building 05K0008 + One building + Sweden Building 05K0009 + One building + Sweden Building 05K0010 + One building + Sweden Building 05K0011 + One building + Sweden Building 05K0012 + One building + Sweden Building 05K0013 + One building + Sweden Building 05K0014 + One building +

479

Boundary conditions for the lattice Boltzmann method.  

E-Print Network (OSTI)

?? Based on the no-slip boundary condition for walls at rest for the lattice Boltzmann Bathnagar-Gross-Krook method by J.C.G. Verschaeve [Phys. Rev. 80,036703 (2009)], a… (more)

le coupanec, erwan

2010-01-01T23:59:59.000Z

480

Nonlinear boundary value problem of magnetic insulation  

E-Print Network (OSTI)

On the basis of generalization of upper and lower solution method to the singular two point boundary value problems, the existence theorem of solutions for the system, which models a process of magnetic insulation in plasma is proved.

A. V. Sinitsyn

2000-09-09T23:59:59.000Z

Note: This page contains sample records for the topic "marine boundary layer" 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

Brownian walkers within subdiffusing territorial boundaries  

E-Print Network (OSTI)

Inspired by the collective phenomenon of territorial emergence, whereby animals move and interact through the scent marks they deposit, we study the dynamics of a 1D Brownian walker in a random environment consisting of confining boundaries that are themselves diffusing anomalously. We show how to reduce, in certain parameter regimes, the non-Markovian, many-body problem of territoriality to the analytically tractable one-body problem studied here. The mean square displacement (MSD) of the 1D Brownian walker within subdiffusing boundaries is calculated exactly and generalizes well known results when the boundaries are immobile. Furthermore, under certain conditions, if the boundary dynamics are strongly subdiffusive, we show the appearance of an interesting non-monotonicity in the time dependence of the MSD, giving rise to transient negative diffusion.

Luca Giuggioli; Jonathan R. Potts; Stephen Harris

2011-02-04T23:59:59.000Z

482

Building Technologies Office: Guides and Case Studies for Marine Climates  

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

Marine Climates to someone by E-mail Marine Climates to someone by E-mail Share Building Technologies Office: Guides and Case Studies for Marine Climates on Facebook Tweet about Building Technologies Office: Guides and Case Studies for Marine Climates on Twitter Bookmark Building Technologies Office: Guides and Case Studies for Marine Climates on Google Bookmark Building Technologies Office: Guides and Case Studies for Marine Climates on Delicious Rank Building Technologies Office: Guides and Case Studies for Marine Climates on Digg Find More places to share Building Technologies Office: Guides and Case Studies for Marine Climates on AddThis.com... About Take Action to Save Energy Partner With DOE Activities Solar Decathlon Building America Research Innovations Research Tools Building Science Education

483

Characterizing marine mammal stranding events along the Texas coast  

E-Print Network (OSTI)

The Texas Marine Mammal Stranding Network (TMMSN) is a valuable data resource for the marine mammal community. Limitations of funding and personnel severely impact the ability of the Network to maintain impeccable databases. This research...

Mullins, Ruth Louise

2008-10-10T23:59:59.000Z

484

Scotrenewables Wind Power and Marine Power Ltd | Open Energy...  

Open Energy Info (EERE)

Wind Power and Marine Power Ltd Jump to: navigation, search Name: Scotrenewables Wind Power and Marine Power Ltd Place: Orkey, Scotland, United Kingdom Zip: KW16 3AW Sector:...

485

Stratified Communities of Active Archaea in Deep Marine Subsurface Sediments  

Science Journals Connector (OSTI)

...of microbes in methane hydrate-bearing deep marine...Kvenvolden, K. A. 1993. Gas hydrates-geological perspective...and J. Corbeil. 2005. Sand DNA-a genetic library...communities from methane hydrate-bearing deep marine...

Ketil B. Sřrensen; Andreas Teske

2006-07-01T23:59:59.000Z

486

A History of Marine Biodiversity Scientific Research in Costa Rica  

Science Journals Connector (OSTI)

Marine biodiversity scientific research in Costa Rica started in ... the seas worldwide. The first publications on marine organisms collected in Costa Rica were published ... sees the contributions of the first C...

Jorge Cortés

2009-01-01T23:59:59.000Z

487

Marine Biodiversity of Costa Rica: Perspectives and Conclusions  

Science Journals Connector (OSTI)

According to the numbers presented in the different taxonomic chapters of the present book, the marine biodiversity of Costa Rica comprises a total of ... species, representing about 3.5% of all marine species re...

Ingo S. Wehrtmann; Jorge Cortés…

2009-01-01T23:59:59.000Z

488

What Structures Marine Biodiversity and why does it vary?  

Science Journals Connector (OSTI)

Marine ecological biodiversity research is a scientific field with few ... was a consequence of the general feeling that marine biodiversity is far less threatened than terrestrial biodiversity. This view is not ...

C. Heip

2003-01-01T23:59:59.000Z

489

Marine biodiversity — Thoughts on the subjects and their investigators  

Science Journals Connector (OSTI)

A comparison of terrestrial and marine ecosystems in terms of their basic ecosystems and biodiversity characteristics (e.g., energy flow, ... outline specific problems involved in the inference of marine biodiversity

Gerhard Haszprunar

2001-01-01T23:59:59.000Z

490

The biodiversity of macrofaunal organisms in marine sediments  

Science Journals Connector (OSTI)

Marine sediments cover most of the ocean bottom, ... size. Globally, only a small portion of marine habitats have been sampled for macrofauna, but ... global syntheses of patterns of individual taxa and biodiversity

Paul V.R. Snelgrove

1998-09-01T23:59:59.000Z

491

The Oceans and Their Challenge to Conserve Marine Biodiversity  

Science Journals Connector (OSTI)

The marine environment is often viewed as a vast ... habitats and ecosystems supporting a diverse range of marine life, from familiar charismatic animals to strange ... number of challenges including the alarming...

Róisín Nash

2013-01-01T23:59:59.000Z

492

Coastal-marine discontinuities and synergisms: implications for biodiversity conservation  

Science Journals Connector (OSTI)

Coastal-marine biodiversity conservation must focus increasingly at the level ... multiscale, integrated dynamics of weather, ice, marine mammal feeding, and community structure. In ... systems depend upon the co...

G. Carleton Ray

1996-09-01T23:59:59.000Z

493

Systematic evaluation of the reliability of marine diesel engines  

Science Journals Connector (OSTI)

A systematic model is proposed for evaluating the operational reliability of marine diesel engines. In mathematical terms, the model is ... permits the estimation of the overall reliability of marine diesel engines

G. S. Gamidov; N. K. Sanaev; Z. I. Adeev

2009-05-01T23:59:59.000Z

494

The Estimation of the Marine Main Diesel Engine Energy Balance  

Science Journals Connector (OSTI)

The basis of impact of energy device (marine main diesel engine) on its environment in terms of energy ... . Types of energy and exergy characterizing the marine main diesel engine are presented. The description ...

Z. Matuszak; G. Nicewicz

2014-01-01T23:59:59.000Z

495

Tribological design constraints of marine renewable energy systems  

Science Journals Connector (OSTI)

...looks at the tribology of three green marine energy systems, offshore wind, tidal...undermines the reputation of this green energy source to produce reliable energy...looks at the tribology of three green marine energy systems, offshore wind, tidal...

2010-01-01T23:59:59.000Z

496

Tribological design constraints of marine renewable energy systems  

Science Journals Connector (OSTI)

...countries. Marine energy conversion systems are at the...Most marine renewable energy conversion systems require tribological...reduced lifetimes by a factor of-10. An example...three different ocean energy conversion devices has been reviewed...

2010-01-01T23:59:59.000Z

497

Effects of Oil and Oil Dispersants on the Marine Environment  

Science Journals Connector (OSTI)

13 April 1971 research-article Effects of Oil and Oil Dispersants on the Marine Environment R. G. J. Shelton In the context of marine pollution, the term 'oil' can cover a very wide range of substances and usually...

1971-01-01T23:59:59.000Z

498

Dynamic modeling of tubular SOFC for marine power system  

Science Journals Connector (OSTI)

Solid oxide fuel cell (SOFC) has been identified as an effective and clean alternative choice for marine power system. This paper emphasizes on the ... SOFC power system and its performance based upon marine oper...

Bao-gang San; Pei-lin Zhou; David Clealand

2010-09-01T23:59:59.000Z

499

Primary and Secondary Distillates as Marine Fuel Oil  

Science Journals Connector (OSTI)

The component compositions of marine fuel oils satisfying the requirements of TU 38. ... were developed. Light gasoils replace standard diesel fuel in marine fuel oil. The demulsifiability of light and heavy ... ...

T. N. Mitusova; I. A. Pugach; N. P. Averina…

500

Marine regime shifts: drivers and impacts on ecosystems services  

Science Journals Connector (OSTI)

...function of marine ecosystems [1,2]. A regime...of terrestrial and aquatic ecosystems, including lakes...on European marine ecosystems: observations, expectations...Threshold models in restoration and conservation...

2015-01-01T23:59:59.000Z