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Note: This page contains sample records for the topic "ice rink field" from the National Library of EnergyBeta (NLEBeta).
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1

Carbon monoxide in indoor ice skating rinks: Evaluation of absorption by adult hockey players  

Science Conference Proceedings (OSTI)

We evaluated alveolar carbon monoxide (CO) levels of 122 male, adult hockey players active in recreational leagues of the Quebec City region (Canada), before and after 10 weekly 90-minute games in 10 different rinks. We also determined exposure by quantifying the average CO level in the rink during the games. Other variables documented included age, pulmonary function, aerobic capacity, and smoking status. Environmental concentrations varied from 1.6 to 131.5 parts per million (ppm). We examined the absorption/exposure relationship using a simple linear regression model. In low CO exposure levels, physical exercise lowered the alveolar CO concentration. However, we noted that for each 10 ppm of CO in the ambient air, the players had adsorbed enough CO to raise their carboxyhemoglobin (COHb) levels by 1 percent. This relationship was true both for smokers and non-smokers. We suggest that an average environmental concentration of 20 ppm of CO for the duration of a hockey game (90 minutes) should be reference limit not to be exceeded in indoor skating rinks.

Levesque, B.; Dewailly, E.; Lavoie, R.; Prud'Homme, D.; Allaire, S. (Centre hospitalier de l'Universite Laval, Quebec City (Canada))

1990-05-01T23:59:59.000Z

2

Forecast Verification of the Polar Ice Prediction System (PIPS) Sea Ice Concentration Fields  

Science Conference Proceedings (OSTI)

The National Ice Center relies upon a coupled ice–ocean model called the Polar Ice Prediction System (PIPS) to provide guidance for its 24–120-h sea ice forecasts. Here forecast skill assessments of the sea ice concentration (C) fields from PIPS ...

Michael L. Van Woert; Cheng-Zhi Zou; Walter N. Meier; Philip D. Hovey; Ruth H. Preller; Pamela G. Posey

2004-06-01T23:59:59.000Z

3

Ice structures, patterns, and processes: A view across the ice-fields  

E-Print Network (OSTI)

We look ahead from the frontiers of research on ice dynamics in its broadest sense; on the structures of ice, the patterns or morphologies it may assume, and the physical and chemical processes in which it is involved. We highlight open questions in the various fields of ice research in nature; ranging from terrestrial and oceanic ice on Earth, to ice in the atmosphere, to ice on other solar system bodies and in interstellar space.

Bartels-Rausch, Thorsten; Cartwright, Julyan H E; Escribano, Rafael; Finney, John L; Grothe, Hinrich; Gutiérrez, Pedro J; Haapala, Jari; Kuhs, Werner F; Pettersson, Jan B C; Price, Stephen D; Sainz-Díaz, C Ignacio; Stokes, Debbie J; Strazzulla, Giovanni; Thomson, Erik S; Trinks, Hauke; Uras-Aytemiz, Nevin; 10.1103/RevModPhys.84.885

2012-01-01T23:59:59.000Z

4

Snow and Ice Field Handbook for Snowplow Operators  

E-Print Network (OSTI)

Minnesota Snow and Ice Control Field Handbook for Snowplow Operators Second Revision Manual Number Local Road Research Board #12;#12;Minnesota Snow and Ice Control Field Handbook for Snowplow Operators for an Effective Anti-icing Program, produced by the Utah LTAP Center. Thanks to the following sponsors

Minnesota, University of

5

Field Evidence Supporting Quantitative Predictions of Secondary Ice Production Rates  

Science Conference Proceedings (OSTI)

Field observations from three different areas in the United States are used to determine the rates of appearance of ice particles in cumulus clouds. Those rates are compared to predictions obtained using the laboratory studies of the Hallett-...

Raymond L. Harris-Hobbs; William A. Cooper

1987-04-01T23:59:59.000Z

6

Field demonstration of the ICE 250[trademark] Cleaning System  

SciTech Connect

The ICE 250[trademark] Cleaning System was engineered to convert water into small ice particles for use in cleaning and decontamination applications. Ice crystals are produced in a special icemaker and pressured through a hose-nozzle onto the surface to be cleaned. The Rocky Mountain Oilfield Testing Center and Ice Cleaning Systems, Inc., conducted a test of this system at Naval Petroleum Reserve No. 3 to evaluate the system's cleaning capabilities in an oil field environment. Equipment cleaned included an oil storage tank, a rod pumping unit, a road grader, and a wellhead. Contaminants were unrefined sour crude oil, hydraulic fluid, paraffin, and dirt, occurring separately and as mixtures. In all four demonstration cleaning tasks, the ICE 250 System effectively removed surface contaminant mixtures in a timely manner and left no oily residue. A minimal amount of waste moistur2048s generated, thereby reducing cleanup and disposal costs.

Johnston, J.L.; Jackson, L.M.

1999-10-05T23:59:59.000Z

7

Field demonstration of the ICE 250{trademark} Cleaning System  

SciTech Connect

The ICE 250{trademark} Cleaning System was engineered to convert water into small ice particles for use in cleaning and decontamination applications. Ice crystals are produced in a special icemaker and pressured through a hose-nozzle onto the surface to be cleaned. The Rocky Mountain Oilfield Testing Center and Ice Cleaning Systems, Inc., conducted a test of this system at Naval Petroleum Reserve No. 3 to evaluate the system's cleaning capabilities in an oil field environment. Equipment cleaned included an oil storage tank, a rod pumping unit, a road grader, and a wellhead. Contaminants were unrefined sour crude oil, hydraulic fluid, paraffin, and dirt, occurring separately and as mixtures. In all four demonstration cleaning tasks, the ICE 250 System effectively removed surface contaminant mixtures in a timely manner and left no oily residue. A minimal amount of waste moisture was generated, thereby reducing cleanup and disposal costs.

Johnston, J.L.; Jackson, L.M.

1999-10-05T23:59:59.000Z

8

Department of Energy CarlsbadField OffICe  

E-Print Network (OSTI)

MaterialParameters . WasteMatrixCodes Reference U.S. Department of Energy, 2001, WIPP Waste Information System User's ManualDepartment of Energy CarlsbadField OffICe P. o. Box 3090 Carlsbad. New Mexico 88221 Elizabeth of July 12, 2004, the U.S. Department of Energy (DOE) is providing information that answers the questions

9

Solving the energy dilemma at Seven Bridges Ice Arena  

SciTech Connect

Seven Bridges Ice Arena with three ice skating rinks is among the largest ice skating facilities in the US. A complete fitness center, pro shop, second level observation gallery, restaurant, aerobics room, dance studio and children`s play room round out the 120,000 ft{sup 2} (11,215 m{sup 2}) world class facility. The Olympic Hockey League ice rink has seating for 800 spectators; and the National Hockey League ice rink has 1,200 spectator seats. The collegiate ice sheet has participant seating only. When building the one-year-old facility, the management initially solicited HVAC design/build system plans based on the usual Package Roof Top (RTU) heat/cool units or split system parameters. Such a plan could have been a disaster because high energy costs have contributed directly to the closing of 20 rinks in the Chicago area. This article describes a HVAC system that would take advantage of every Energy Conservation Opportunities (ECO) possible to ensure the economic well being of this property. This included a plan that uses the refrigeration for both cooling and heating, which eliminated the need for commercial packaged units.

Louria, D. [Air Comfort Corp., Broadview, IL (United States)

1996-08-01T23:59:59.000Z

10

Ice  

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

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

11

Field Observations of the Bering Sea Ice Edge Properties during March 1979  

Science Conference Proceedings (OSTI)

During March 1979 field observations in the Bering Sea show that because of the interaction of winds and ocean swell with the ice, the ice edge divides into three distinct zones. First, adjacent to the open ocean is an “edge" zone, 1–15 km in ...

Jane Bauer; Seelye Martin

1980-12-01T23:59:59.000Z

12

Near-inertial internal wave field in the Canada Basin from Ice-Tethered Profilers  

Science Conference Proceedings (OSTI)

Salinity and temperature profiles from drifting Ice-Tethered Profilers in the Beaufort Gyre region of the Canada Basin are used to characterize and quantify the regional near-inertial internal wave field over one year. Vertical displacements of ...

Hayley V. Dosser; Luc Rainville; John M. Toole

13

Insulator Calculation Engine (ICE) Version 2.0: E-field on Porcelain/Glass Insulators  

Science Conference Proceedings (OSTI)

ICE determines the electric field (E-field) distribution on transmission line polymer insulators (also called NCI or composite insulators) and aids in the selection of the appropriate corona ring.Benefits & Value:Determine the appropriate application of corona rings on transmission line polymer insulators enabling life expectancy.Simple data entry of information selected from pre-populated structure, insulator and hardware ...

2013-12-20T23:59:59.000Z

14

Temperature and Melt Modeling on the Prince of Wales Ice Field, Canadian High Arctic  

Science Conference Proceedings (OSTI)

Near-surface temperature variability and net annual mass balance were monitored from May 2001 to April 2003 in a network of 25 sites on the Prince of Wales Ice Field, Ellesmere Island, Canada. The observational array spanned an area of 180 km by ...

Shawn J. Marshall; Martin J. Sharp

2009-03-01T23:59:59.000Z

15

Sea Ice Identification and Derivation of Its Velocity Field by X-Band Doppler Radar  

Science Conference Proceedings (OSTI)

In this study a 3D scanning X-band Doppler radar (XDR) was deployed near the coast of the Sea of Okhotsk, Hokkaido, Japan, in November 2005 to simultaneously observe sea ice and snow clouds. Doppler radars are commonly used to detect wind fields ...

Yasushi Fujiyoshi; Koji Osumi; Masayuki Ohi; Yoshinori Yamada

2013-06-01T23:59:59.000Z

16

Spin ice in a field: Quasi-phases and pseudo-transitions  

SciTech Connect

Thermodynamics of a short-range model of spin ice magnets in a field is considered in the Bethe-Peierls approximation. The results obtained for [111], [100], and [011] fields agree reasonably well with the existing Monte Carlo simulations and some experiments. In this approximation, all extremely sharp field-induced anomalies are described by analytic functions of temperature and the applied field. In spite of the absence of true phase transitions, the analysis of the entropy and specific heat reliefs over the H-T plane allows discerning 'pseudo-phases' with a specific character of spin fluctuations and defining the lines of relatively sharp 'pseudo-transitions' between them.

Timonin, P. N., E-mail: pntim@live.ru [Southern Federal University (Russian Federation)

2011-08-15T23:59:59.000Z

17

Importance of aerosol composition, mixing state, and morphology for heterogeneous ice nucleation: A combined field and laboratory approach  

Science Conference Proceedings (OSTI)

In this study chemical compositions of background aerosol and ice nuclei were examined through laboratory investigations using Raman spectroscopy and field measurements by single-particle mass spectrometry. Aerosol sampling took place at Storm Peak Laboratory in Steamboat Springs, Colorado (elevation of 3210 m). A cascade impactor was used to collect coarse-mode aerosol particles for laboratory analysis by Raman spectroscopy; the composition, mixing state, and heterogeneous ice nucleation activity of individual particles were examined. For in situ analysis of fine-mode aerosol, ice nucleation on ambient particles was observed using a compact ice nucleation chamber. Ice crystals were separated from unactivated aerosol using a pumped counterflow virtual impactor, and ice nuclei were analyzed using particle analysis by laser mass spectrometry. For both fine and coarse modes, the ice nucleating particle fractions were enriched in minerals and depleted in sulfates and nitrates, compared to the background aerosol sampled. The vast majority of particles in both the ambient and ice active aerosol fractions contained a detectable amount of organic material. Raman spectroscopy showed that organic material is sometimes present in the form of a coating on the surface of inorganic particles. We find that some organic-containing particles serve as efficient ice nuclei while others do not. For coarse-mode aerosol, organic particles were only observed to initiate ice formation when oxygen signatures were also present in their spectra.

Baustian, Kelly J.; Cziczo, Daniel J.; Wise, M. A.; Pratt, Kerri; Kulkarni, Gourihar R.; Hallar, Anna G.; Tolbert, Margaret A.

2012-03-30T23:59:59.000Z

18

A Comparison of Measured and Modeled Broadband Fluxes from Aircraft Data during the ICE '89 Field Experiment  

Science Conference Proceedings (OSTI)

During the 1989 intensive field campaign of the International Cirrus Experiment (ICE) over the North Sea, broadband radiative fluxes were measured in, above, and below cirrus cloud by a number of European meteorological research aircraft. One ...

R. W. Saunders; G. Brogniez; J. C. Buriez; R. Meerkötter; P. Wendling

1992-08-01T23:59:59.000Z

19

Importance of aerosol composition, mixing state, and morphology for heterogeneous ice nucleation: A combined field and laboratory approach  

E-Print Network (OSTI)

In this study chemical compositions of background aerosol and ice nuclei were examined through laboratory investigations using Raman spectroscopy and field measurements by single-particle mass spectrometry. Aerosol sampling ...

Baustian, Kelly J.

20

Heterogeneous ice nucleation and water uptake by field-collected atmospheric particles below 273 K  

Science Conference Proceedings (OSTI)

Atmospheric ice formation induced by particles with complex chemical and physical properties through heterogeneous nucleation is not well understood. Heterogeneous ice nucleation and water uptake by ambient particles collected from urban environments in Los Angeles and Mexico City are presented. Using a vapour controlled cooling system equipped with an optical microscopy, the range of onset conditions for ice nucleation and water uptake by the collected particles was determined as a function of temperature (200{273 K) and relative humidity with respect to ice (RHice) up to water saturation. Three distinctly different types of authentic atmospheric particles were investigated including soot particles associated with organics/inorganics, inorganic particles of marine origin coated with organic material, and Pb/Zn containing inorganic particles apportioned to anthropogenic emissions relevant to waste incineration. Single particle characterization was provided by micro-spectroscopic analyses using computer controlled scanning electron microscopy with energy dispersive analysis of X-rays (CCSEM/EDX) and scanning transmission X-ray microscopy with near edge X-ray absorption ne structure spectroscopy (STXM/NEXAFS). Above 230 K, signicant differences in water uptake and immersion freezing effciencies of the different particle types were observed. Below 230 K, the particles exhibited high deposition ice nucleation effciencies and formed ice at RHice values well below homogeneous ice nucleation limits. The data show that the chemical composition of these eld{collected particles plays an important role in determining water uptake and immersion freezing. Heterogeneous ice nucleation rate coeffcients, cumulative ice nuclei (IN) spectrum, and IN activated fraction for deposition ice nucleation are derived. The presented ice nucleation data demonstrate that anthropogenic and marine particles comprising of various chemical and physical properties exhibit distinctly different ice nucleation effciencies and can serve as effcient IN at atmospheric conditions typical for cirrus and mixed phase clouds. This indicates a potential link between human activities and cloud formation, and thus climate.

Wang, Bingbing; Laskin, Alexander; Roedel, Tobias R.; Gilles, Marry K.; Moffet, Ryan C.; Tivanski, Alexei V.; Knopf, Daniel A.

2012-09-25T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Ice Volume and Subglacial Topography for Western Canadian Glaciers from Mass Balance Fields, Thinning Rates, and a Bed Stress Model  

Science Conference Proceedings (OSTI)

A method is described to estimate the thickness of glacier ice using information derived from the measured ice extent, surface topography, surface mass balance, and rate of thinning or thickening of the ice column. Shear stress beneath an ice ...

Garry K. C. Clarke; Faron S. Anslow; Alexander H. Jarosch; Valentina Radi?; Brian Menounos; Tobias Bolch; Etienne Berthier

2013-06-01T23:59:59.000Z

22

Field Evaluation of Unitary Thermal Energy Storage: Ice Bear Final Report for CPS Energy  

Science Conference Proceedings (OSTI)

Thermal energy storage devices can be used by electric utility companies to shift load to off-peak hours. This report investigates ice storage as a method of shifting cooling loads to overnight periods. Three Ice Bear systems were installed in San Antonio, Texas, at an office, a convenience store, and a university campus building. These devices were used to offset a nominal 5-ton  stage of cooling during set hours by using ice, which had been made overnight. The systems were integrated with ...

2013-03-31T23:59:59.000Z

23

Sea Ice Simulations Based on Fields Generated by the GLAS GCM  

Science Conference Proceedings (OSTI)

A four-month simulation of the thermodynamic portion of the Parkinson-Washington sea ice model was conducted using atmospheric boundary conditions that were obtained from a pre-computed seasonal simulation of the Goddard Laboratory for ...

Claire L. Parkinson; Gerald F. Herman

1980-12-01T23:59:59.000Z

24

Advances in the Estimation of Ice Particle Fall Speeds Using Laboratory and Field Measurements  

Science Conference Proceedings (OSTI)

Accurate estimates for the fall speed of natural hydrometeors are vital if their evolution in clouds is to be understood quantitatively. In this study, laboratory measurements of the terminal velocity ?t for a variety of ice particle models ...

A. J. Heymsfield; C. D. Westbrook

2010-08-01T23:59:59.000Z

25

Distributions of Liquid, Vapor, and Ice in an Orographic Cloud from Field Observations  

Science Conference Proceedings (OSTI)

The phase distribution of the water mass of a cold orographic cloud into vapor, liquid, and ice is calculated from measurements made from an instrumented aircraft. The vapor values are calculated from thermodynamic measurements, and the liquid is ...

Taneil Uttal; Robert M. Rauber; Lewis O. Grant

1988-04-01T23:59:59.000Z

26

Anemometry in Icing Conditions  

Science Conference Proceedings (OSTI)

The accuracy of wind measurements in icing conditions is discussed, and wind tunnel calibrations as well as field comparisons are presented for three heated anemometers that use different measuring principles. It is pointed out that ice-free ...

Lasse Makkonen; Pertti Lehtonen; Lauri Helle

2001-09-01T23:59:59.000Z

27

A Comprehensive Habit Diagram for Atmospheric Ice Crystals: Confirmation from the Laboratory, AIRS II, and Other Field Studies  

Science Conference Proceedings (OSTI)

Recent laboratory experiments and in situ observations have produced results in broad agreement with respect to ice crystal habits in the atmosphere. These studies reveal that the ice crystal habit at ?20°C is platelike, extending to ?40°C, and ...

Matthew P. Bailey; John Hallett

2009-09-01T23:59:59.000Z

28

An ice lithography instrument  

SciTech Connect

We describe the design of an instrument that can fully implement a new nanopatterning method called ice lithography, where ice is used as the resist. Water vapor is introduced into a scanning electron microscope (SEM) vacuum chamber above a sample cooled down to 110 K. The vapor condenses, covering the sample with an amorphous layer of ice. To form a lift-off mask, ice is removed by the SEM electron beam (e-beam) guided by an e-beam lithography system. Without breaking vacuum, the sample with the ice mask is then transferred into a metal deposition chamber where metals are deposited by sputtering. The cold sample is then unloaded from the vacuum system and immersed in isopropanol at room temperature. As the ice melts, metal deposited on the ice disperses while the metals deposited on the sample where the ice had been removed by the e-beam remains. The instrument combines a high beam-current thermal field emission SEM fitted with an e-beam lithography system, cryogenic systems, and a high vacuum metal deposition system in a design that optimizes ice lithography for high throughput nanodevice fabrication. The nanoscale capability of the instrument is demonstrated with the fabrication of nanoscale metal lines.

Han, Anpan [Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States); Chervinsky, John [School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States); Branton, Daniel [Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts 02138 (United States); Golovchenko, J. A. [Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States); School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States)

2011-06-15T23:59:59.000Z

29

Reionization on ice  

E-Print Network (OSTI)

The case for substantial far infrared ice emission in local ultraluminous infrared galaxies, expected based on the presence of mid-infrared ice absorption in their spectra and the known far infrared optical properties of ice, is still largely unsupported by direct observation owing to insufficient far infrared spectral coverage. Some marginal supportive evidence is presented here. A clear consequence of far infrared ice emission is the need to extend the range of redshifts considered for submillimeter sources. This is demonstrated via the example of HDF 850.1. The solid phase of the ISM during reionization may be dominated by ice, and this could lead to the presence of reionization sources in submillimeter source catalogs. Submillimeter sources not detected at 24 micron in the GOODS-N field are examined. Two candidate reionization sources are identified at 3.6 micron through possible Gunn-Peterson saturation in the Z band.

C. C. Dudley; M. Imanishi; P. R. Maloney

2006-02-15T23:59:59.000Z

30

Global simulations of ice nucleation and ice supersaturation with an improved cloud scheme in the Community  

E-Print Network (OSTI)

and supersaturation in CAM. The new model is able to reproduce field observations of ice mass and mixed phase cloudGlobal simulations of ice nucleation and ice supersaturation with an improved cloud scheme; accepted 3 June 2010; published 28 September 2010. [1] A processbased treatment of ice supersaturation

Gettelman, Andrew

31

Ice in Clouds Experiment–Layer Clouds. Part II: Testing Characteristics of Heterogeneous Ice Formation in Lee Wave Clouds  

Science Conference Proceedings (OSTI)

Heterogeneous ice nucleation is a source of uncertainty in models that represent ice clouds. The primary goal of the Ice in Clouds Experiment–Layer Clouds (ICE-L) field campaign was to determine if a link can be demonstrated between ice ...

P. R. Field; A. J. Heymsfield; B. J. Shipway; P. J. DeMott; K. A. Pratt; D. C. Rogers; J. Stith; K. A. Prather

2012-03-01T23:59:59.000Z

32

Archimedean Ice  

E-Print Network (OSTI)

The striking boundary dependency (the Arctic Circle phenomenon) exhibited in the ice model on the square lattice extends to other planar set-ups. We present these findings for the triangular and the Kagome lattices. Critical connectivity results guarantee that ice configurations can be generated using the simplest and most efficient local actions. Height functions are utilized throughout the analysis. At the end there is a surprise in store: on the remaining Archimedean lattice for which the ice model can be defined, the 3.4.6.4. lattice, the long range behavior is completely different from the other cases.

Kari Eloranta

2009-09-22T23:59:59.000Z

33

Hydrogen ICE  

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

Chevrolet Silverado 1500HD Hydrogen ICE 1 Conversion Vehicle Specifications Engine: 6.0 L V8 Fuel Capacity: 10.5 GGE Nominal Tank Pressure: 5,000 psi Seatbelt Positions: Five...

34

Surface Albedo of the Antarctic Sea Ice Zone  

Science Conference Proceedings (OSTI)

In three ship-based field experiments, spectral albedos were measured at ultraviolet, visible, and near-infrared wavelengths for open water, grease ice, nilas, young “grey” ice, young grey-white ice, and first-year ice, both with and without snow ...

Richard E. Brandt; Stephen G. Warren; Anthony P. Worby; Thomas C. Grenfell

2005-09-01T23:59:59.000Z

35

Ice Fishing  

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

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

36

ARM - Measurement - Cloud ice particle  

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

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

37

Parameterization of the Extinction Coefficient in Ice and Mixed-Phase Arctic Clouds during the ISDAC Field Campaign  

SciTech Connect

This report documents the history of attempts to directly measure cloud extinction, the current measurement device known as the Cloud Extinction Probe (CEP), specific problems with direct measurement of extinction coefficient, and the attempts made here to address these problems. Extinction coefficient is one of the fundamental microphysical parameters characterizing bulk properties of clouds. Knowledge of extinction coefficient is of crucial importance for radiative transfer calculations in weather prediction and climate models given that Earth's radiation budget (ERB) is modulated much by clouds. In order for a large-scale model to properly account for ERB and perturbations to it, it must ultimately be able to simulate cloud extinction coefficient well. In turn this requires adequate and simultaneous simulation of profiles of cloud water content and particle habit and size. Similarly, remote inference of cloud properties requires assumptions to be made about cloud phase and associated single-scattering properties, of which extinction coefficient is crucial. Hence, extinction coefficient plays an important role in both application and validation of methods for remote inference of cloud properties from data obtained from both satellite and surface sensors (e.g., Barker et al. 2008). While estimation of extinction coefficient within large-scale models is relatively straightforward for pure water droplets, thanks to Mie theory, mixed-phase and ice clouds still present problems. This is because of the myriad forms and sizes that crystals can achieve, each having their own unique extinction properties. For the foreseeable future, large-scale models will have to be content with diagnostic parametrization of crystal size and type. However, before they are able to provide satisfactory values needed for calculation of radiative transfer, they require the intermediate step of assigning single-scattering properties to particles. The most basic of these is extinction coefficient, yet it is rarely measured directly, and therefore verification of parametrizations is difficult. The obvious solution is to be able to measure microphysical properties and extinction at the same time and for the same volume. This is best done by in situ sampling by instruments mounted on either balloon or aircraft. The latter is the usual route and the one employed here. Yet the problem of actually measuring extinction coefficient directly for arbitrarily complicated particles still remains unsolved.

Korolev, A; Shashkov, A; Barker, H

2012-03-06T23:59:59.000Z

38

Parameterization of the Extinction Coefficient in Ice and Mixed-Phase Arctic Clouds during the ISDAC Field Campaign  

SciTech Connect

This report documents the history of attempts to directly measure cloud extinction, the current measurement device known as the Cloud Extinction Probe (CEP), specific problems with direct measurement of extinction coefficient, and the attempts made here to address these problems. Extinction coefficient is one of the fundamental microphysical parameters characterizing bulk properties of clouds. Knowledge of extinction coefficient is of crucial importance for radiative transfer calculations in weather prediction and climate models given that Earth's radiation budget (ERB) is modulated much by clouds. In order for a large-scale model to properly account for ERB and perturbations to it, it must ultimately be able to simulate cloud extinction coefficient well. In turn this requires adequate and simultaneous simulation of profiles of cloud water content and particle habit and size. Similarly, remote inference of cloud properties requires assumptions to be made about cloud phase and associated single-scattering properties, of which extinction coefficient is crucial. Hence, extinction coefficient plays an important role in both application and validation of methods for remote inference of cloud properties from data obtained from both satellite and surface sensors (e.g., Barker et al. 2008). While estimation of extinction coefficient within large-scale models is relatively straightforward for pure water droplets, thanks to Mie theory, mixed-phase and ice clouds still present problems. This is because of the myriad forms and sizes that crystals can achieve, each having their own unique extinction properties. For the foreseeable future, large-scale models will have to be content with diagnostic parametrization of crystal size and type. However, before they are able to provide satisfactory values needed for calculation of radiative transfer, they require the intermediate step of assigning single-scattering properties to particles. The most basic of these is extinction coefficient, yet it is rarely measured directly, and therefore verification of parametrizations is difficult. The obvious solution is to be able to measure microphysical properties and extinction at the same time and for the same volume. This is best done by in situ sampling by instruments mounted on either balloon or aircraft. The latter is the usual route and the one employed here. Yet the problem of actually measuring extinction coefficient directly for arbitrarily complicated particles still remains unsolved.

Korolev, A; Shashkov, A; Barker, H

2012-03-06T23:59:59.000Z

39

Ice Storm Database and Ice Severity Maps  

Science Conference Proceedings (OSTI)

Historical icing information has several valuable uses in overhead transmission line ice loading design and research. Previously, this type of information was neither readily available nor easily acquired. This report describes the creation of an electronic ice storm database and regional ice severity maps for the United States.

1996-12-17T23:59:59.000Z

40

A TWP-ICE High-Level Cloud Case Study  

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

A TWP-ICE High-Level Cloud Case Study Mace, Gerald University of Utah Category: Field Campaigns The Tropical Warm Pool International Cloud Experiment (TWP ICE) was conducted near...

Note: This page contains sample records for the topic "ice rink field" 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

An Improved Filter Technique for Ice Nucleus Measurements  

Science Conference Proceedings (OSTI)

No satisfactory standard field method has been established for the measurement of ice nucleus concentrations, although the filter technique is a promising candidate if the tendency for ice nucleus concentrations to decrease as the sample volume ...

Chi-Fan Shih; Takeshi Ohtake

1985-09-01T23:59:59.000Z

42

Energy optimization in ice hockey halls I. The system COP as a multivariable function, brine and design choices  

E-Print Network (OSTI)

This work is the first in a series of articles addressing the energy optimization in ice hockey halls. Here we adopt an analytical method, called functional optimization, to find which design and operating conditions maximize the Coefficient Of Performance of the entire cooling system (brine pumps and cooling tower), which we call ${\\rm COP}_{sys}$. This is addressed as a function of several variables, like electric consumption and brine physical properties. By maximizing such function, the best configuration and brine choices for the system can thus be determined accurately and rigorously. We investigate the importance of pipe diameter, depth and brine type (ethylene glycol and ammonia) for average-sized ice rinks. An optimal brine density is found, and we compute the weight of the electric consumption of the brine pumps on ${\\rm COP}_{sys}$. Our formulas are validated with heat flow measurement data obtained at an ice hockey hall in Finland. They are also confronted with technical and cost-related constraints, and implemented by simulations with the program COMSOL Multiphysics. The multivariable approach here discussed is general, and can be applied to the rigorous preliminary study of diverse situations in building physics and in many other areas of interest.

Andrea Ferrantelli; Paul Melóis; Miska Räikkönen; Martti Viljanen

2012-11-02T23:59:59.000Z

43

Energy optimization in ice hockey halls I. The system COP as a multivariable function, brine and design choices  

E-Print Network (OSTI)

This work is the first of a series of articles addressing the energy optimization in ice hockey halls. Here we outline an analytic method to predict in which design and operating conditions the COP of the entire cooling system (refrigerator and cooling tower) ${\\rm COP}_{sys}$ is maximum. ${\\rm COP}_{sys}$ is investigated as a function of several variables, like electric consumption and brine physical properties. With this method, the best configuration and brine choices for the system can therefore be determined in advance. We estimate the optimal design of an average-sized ice rink, including pipe diameter, depth and brine type (ethylene glycol and ammonia). We also single out an optimal brine density and show the impact of the electric consumption of the pump on ${\\rm COP}_{sys}$. Our theoretical predictions are validated with heat flow measurement data obtained at an ice hockey hall in Finland. They are also confronted with technical and cost-related constraints, and implemented by simulations with the pr...

Ferrantelli, Andrea; Räikkönen, Miska; Viljanen, Martti

2012-01-01T23:59:59.000Z

44

Glossary Term - Dry Ice  

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

Deuteron Previous Term (Deuteron) Glossary Main Index Next Term (Electron) Electron Dry Ice A block of dry ice sublimating on a table. Dry ice is the solid form of carbon dioxide...

45

Ross Ice Shelf in situ radio-frequency ice attenuation  

E-Print Network (OSTI)

We have measured the in situ average electric field attenuation length for radio-frequency signals broadcast vertically through the Ross Ice Shelf. We chose a location, Moore Embayment, south of Minna Bluff, known for its high reflectivity at the ice-sea interface. We confirmed specular reflection and used the return pulses to measure the average attenuation length from 75-1250 MHz over the round-trip distance of 1155 m. We find the average electric field attenuation length to vary from 500 m at 75 MHz to 300 m at 1250 MHz, with an experimental uncertainty of 55 to 15 m. We discuss the implications for neutrino telescopes that use the radio technique and include the Ross Ice Shelf as part of their sensitive volume.

Taylor Barrella; Steven Barwick; David Saltzberg

2010-11-02T23:59:59.000Z

46

Office of Sustainability November 2011  

E-Print Network (OSTI)

water usage. · A new "PowerPure" water treatment system is being piloted at the Baker Rink cooling tower to cool the rink ice. This system uses an electronic process rather than chemicals to remove dissolved

47

Single Scattering Properties of Atmospheric Ice Crystals  

Science Conference Proceedings (OSTI)

Simulations of scattering and polarization properties for randomly oriented polyhedral ice crystals are presented based on the geometric optics and the far-field diffraction approximation. Particle shapes range from various hexagonal symmetric ...

Andreas Macke; Johannes Mueller; Ehrhard Raschke

1996-10-01T23:59:59.000Z

48

Aircraft Icing Conditions in Northeast Colorado  

Science Conference Proceedings (OSTI)

The in-flight icing environment in northeastern Colorado is described through remote and in situ measurements. Four field efforts in the winters of 1990 through 1994 were conducted in the area, and comprehensive datasets from research aircraft, ...

Marcia K. Politovich; Tiffany A. O. Bernstein

2002-02-01T23:59:59.000Z

49

Mesoscale Boundary Layer and Heat Flux Variations over Pack Ice–Covered Lake Erie  

Science Conference Proceedings (OSTI)

The development of extensive pack ice fields on the Great Lakes significantly influences lake-effect storms and local airmass modification, as well as the regional hydrologic cycle and lake water levels. The evolution of the ice fields and their ...

Mathieu R. Gerbush; David A. R. Kristovich; Neil F. Laird

2008-02-01T23:59:59.000Z

50

Teaching game sense in ice-hockey junior organization.  

E-Print Network (OSTI)

??The purpose of making a manual for Heinolan Kiekko junior ice-hockey club was to provide a tool for coaches everyday work in the field. The… (more)

Juurikkala, Markus

2012-01-01T23:59:59.000Z

51

Arctic ice islands  

SciTech Connect

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

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

1988-01-01T23:59:59.000Z

52

ARM - Measurement - Ice nuclei  

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

to hear from you Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Ice nuclei Small particles around which ice particles form. Categories Cloud Properties...

53

Aging of Accreted Ice  

Science Conference Proceedings (OSTI)

The effect of annealing in accreted ice has been investigated for artificially grown ice deposits after 100 days of storage in a deep freeze unit. Cross sections of the cylindrical deposits have been cut and replicated soon after growth and ...

F. Prodi; L. Levi

1980-06-01T23:59:59.000Z

54

Ice electrode electrolytic cell  

DOE Patents (OSTI)

This invention relates to a method and apparatus for removing heavy metals from waste water, soils, or process streams by electrolytic cell means. The method includes cooling a cell cathode to form an ice layer over the cathode and then applying an electric current to deposit a layer of the heavy metal over the ice. The metal is then easily removed after melting the ice. In a second embodiment, the same ice-covered electrode can be employed to form powdered metals.

Glenn, D.F.; Suciu, D.F.; Harris, T.L.; Ingram, J.C.

1992-12-31T23:59:59.000Z

55

Ice electrode electrolytic cell  

DOE Patents (OSTI)

This invention relates to a method and apparatus for removing heavy metals from waste water, soils, or process streams by electrolytic cell means. The method includes cooling a cell cathode to form an ice layer over the cathode and then applying an electric current to deposit a layer of the heavy metal over the ice. The metal is then easily removed after melting the ice. In a second embodiment, the same ice-covered electrode can be employed to form powdered metals.

Glenn, David F. (Idaho Falls, ID); Suciu, Dan F. (Idaho Falls, ID); Harris, Taryl L. (Idaho Falls, ID); Ingram, Jani C. (Idaho Falls, ID)

1993-01-01T23:59:59.000Z

56

Ice electrode electrolytic cell  

DOE Patents (OSTI)

This invention relates to a method and apparatus for removing heavy metals from waste water, soils, or process streams by electrolytic cell means. The method includes cooling a cell cathode to form an ice layer over the cathode and then applying an electric current to deposit a layer of the heavy metal over the ice. The metal is then easily removed after melting the ice. In a second embodiment, the same ice-covered electrode can be employed to form powdered metals.

Glenn, D.F.; Suciu, D.F.; Harris, T.L.; Ingram, J.C.

1993-04-06T23:59:59.000Z

57

Stability of ferroelectric ice  

E-Print Network (OSTI)

We theoretically study the stability conditions of the ferroelectric ice of the Cmc21 structure, which has been considered, for decades, one of the most promising candidates of the low temperature proton-ordered phase of pure ice Ih. It turned out that the Cmc21 structure is stable only with a certain amount of dopant and the true proton-ordered phase of pure ice Ih remains to be found at lower temperature. Implication for spin ice is mentioned.

Iitaka, Toshiaki

2010-01-01T23:59:59.000Z

58

Metaplectic Ice  

E-Print Network (OSTI)

Spherical Whittaker functions on the metaplectic n-fold cover of GL(r+1) over a nonarchimedean local field containing n distinct n-th roots of unity may be expressed as the partition functions of statistical mechanical systems that are variants of the six-vertex model. If n=1 then in view of the Casselman-Shalika formula this fact is related to Tokuyama's deformation of the Weyl character formula. It is shown that various properties of these Whittaker functions may be expressed in terms of the commutativity of row transfer matrices for the system. Potentially these properties (which are already proved by other methods, but very nontrivial) are amenable to proof by the Yang-Baxter equation.

Ben Brubaker; Daniel Bump; Gautam Chinta; Solomon Friedberg; Paul E. Gunnells

2010-09-09T23:59:59.000Z

59

Parameterizing Size Distribution in Ice Clouds  

SciTech Connect

PARAMETERIZING SIZE DISTRIBUTIONS IN ICE CLOUDS David L. Mitchell and Daniel H. DeSlover ABSTRACT An outstanding problem that contributes considerable uncertainty to Global Climate Model (GCM) predictions of future climate is the characterization of ice particle sizes in cirrus clouds. Recent parameterizations of ice cloud effective diameter differ by a factor of three, which, for overcast conditions, often translate to changes in outgoing longwave radiation (OLR) of 55 W m-2 or more. Much of this uncertainty in cirrus particle sizes is related to the problem of ice particle shattering during in situ sampling of the ice particle size distribution (PSD). Ice particles often shatter into many smaller ice fragments upon collision with the rim of the probe inlet tube. These small ice artifacts are counted as real ice crystals, resulting in anomalously high concentrations of small ice crystals (D < 100 µm) and underestimates of the mean and effective size of the PSD. Half of the cirrus cloud optical depth calculated from these in situ measurements can be due to this shattering phenomenon. Another challenge is the determination of ice and liquid water amounts in mixed phase clouds. Mixed phase clouds in the Arctic contain mostly liquid water, and the presence of ice is important for determining their lifecycle. Colder high clouds between -20 and -36 oC may also be mixed phase but in this case their condensate is mostly ice with low levels of liquid water. Rather than affecting their lifecycle, the presence of liquid dramatically affects the cloud optical properties, which affects cloud-climate feedback processes in GCMs. This project has made advancements in solving both of these problems. Regarding the first problem, PSD in ice clouds are uncertain due to the inability to reliably measure the concentrations of the smallest crystals (D < 100 µm), known as the “small mode”. Rather than using in situ probe measurements aboard aircraft, we employed a treatment of ice cloud optical properties formulated in terms of PSD parameters in combination with remote measurements of thermal radiances to characterize the small mode. This is possible since the absorption efficiency (Qabs) of small mode crystals is larger at 12 µm wavelength relative to 11 µm wavelength due to the process of wave resonance or photon tunneling more active at 12 µm. This makes the 12/11 µm absorption optical depth ratio (or equivalently the 12/11 µm Qabs ratio) a means for detecting the relative concentration of small ice particles in cirrus. Using this principle, this project tested and developed PSD schemes that can help characterize cirrus clouds at each of the three ARM sites: SGP, NSA and TWP. This was the main effort of this project. These PSD schemes and ice sedimentation velocities predicted from them have been used to test the new cirrus microphysics parameterization in the GCM known as the Community Climate Systems Model (CCSM) as part of an ongoing collaboration with NCAR. Regarding the second problem, we developed and did preliminary testing on a passive thermal method for retrieving the total water path (TWP) of Arctic mixed phase clouds where TWPs are often in the range of 20 to 130 g m-2 (difficult for microwave radiometers to accurately measure). We also developed a new radar method for retrieving the cloud ice water content (IWC), which can be vertically integrated to yield the ice water path (IWP). These techniques were combined to determine the IWP and liquid water path (LWP) in Arctic clouds, and hence the fraction of ice and liquid water. We have tested this approach using a case study from the ARM field campaign called M-PACE (Mixed-Phase Arctic Cloud Experiment). This research led to a new satellite remote sensing method that appears promising for detecting low levels of liquid water in high clouds typically between -20 and -36 oC. We hope to develop this method in future research.

DeSlover, Daniel; Mitchell, David L.

2009-09-25T23:59:59.000Z

60

Mathematical Modelling and Numerical Simulation of Marine Ecosystems With Applications to Ice Algae.  

E-Print Network (OSTI)

??Sea-ice ecosystem modelling is a novel field of research. In this thesis, the main organism studied is sea-ice algae. A basic introduction to algae and… (more)

Wickramage, Shyamila Iroshi Perera

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Ice Crystal Linear Growth Rates from ?20° to ?70°C: Confirmation from Wave Cloud Studies  

Science Conference Proceedings (OSTI)

As a result of recent comprehensive laboratory and field studies, many details have been clarified concerning atmospheric ice crystal habits below ?20°C as a function of temperature, ice supersaturation, air pressure, and growth history. A ...

Matthew Bailey; John Hallett

2012-01-01T23:59:59.000Z

62

Global Simulations of Ice nucleation and Ice Supersaturation with an Improved Cloud Scheme in the Community Atmosphere Model  

Science Conference Proceedings (OSTI)

A process-based treatment of ice supersaturation and ice-nucleation is implemented in the National Center for Atmospheric Research (NCAR) Community Atmosphere Model (CAM). The new scheme is designed to allow (1) supersaturation with respect to ice, (2) ice nucleation by aerosol particles and (3) ice cloud cover consistent with ice microphysics. The scheme is implemented with a 4-class 2 moment microphysics code and is used to evaluate ice cloud nucleation mechanisms and supersaturation in CAM. The new model is able to reproduce field observations of ice mass and mixed phase cloud occurrence better than previous versions of the model. Simulations indicate heterogeneous freezing and contact nucleation on dust are both potentially important over remote areas of the Arctic. Cloud forcing and hence climate is sensitive to different formulations of the ice microphysics. Arctic radiative fluxes are sensitive to the parameterization of ice clouds. These results indicate that ice clouds are potentially an important part of understanding cloud forcing and potential cloud feedbacks, particularly in the Arctic.

Gettelman, A.; Liu, Xiaohong; Ghan, Steven J.; Morrison, H.; Park, Sungsu; Conley, Andrew; Klein, Stephen A.; Boyle, James; Mitchell, David; Li, J-L F.

2010-09-28T23:59:59.000Z

63

Liquid Nitrogen Ice Cream  

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

Liquid Nitrogen Ice Cream If you have access to liquid nitrogen and the proper safety equipment and training, try this in place of your normal cryogenics demonstration Download...

64

Transporting Dry Ice  

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

Requirements for Shipping Dry Ice IATA PI 904 Source: Reg of the Day from ERCweb 2006 Environmental Resource Center | 919-469-1585 | webmaster@ercweb.com http:...

65

Mobile Ice Nucleus Spectrometer  

SciTech Connect

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

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

2012-05-07T23:59:59.000Z

66

Photophysiology and cellular composition of sea ice algae  

SciTech Connect

The productivity of sea ice algae depends on their physiological capabilities and the environmental conditions within various microhabitats. Pack ice is the dominant form of sea ice, but the photosynthetic activity of associated algae has rarely been studied. Biomass and photosynthetic rates of ice algae of the Weddell-Scotia Sea were investigated during autumn and winter, the period when ice cover grows from its minimum to maximum. Biomass-specific photosynthetic rates typically ranged from 0.3 to 3.0 {mu}g C {center dot} {mu}g chl{sup {minus}1} {center dot} h{sup {minus}1} higher than land-fast ice algae but similar to Antarctic phytoplankton. Primary production in the pack ice during winter may be minor compared to annual phytoplankton production, but could represent a vital seasonal contribution to the Antarctic ecosystem. Nutrient supply may limit the productivity of ice algae. In McMurdo Sound, congelation ice algae appeared to be more nutrient deficient than underlying platelet ice algae based on: lower nitrogen:carbon, chlorophyll:carbon, and protein:carbohydrate; and {sup 14}C-photosynthate distribution to proteins and phospholipids was lower, while distribution to polysaccharides and neutral lipids was higher. Depletion of nitrate led to decreased nitrogen:carbon, chlorophyll:carbon, protein:carbohydrate, and {sup 14}C-photosynthate to proteins. Studied were conducted during the spring bloom; therefore, nutrient limitation may only apply to dense ice algal communities. Growth limiting conditions may be alleviated when algae are released into seawater during the seasonal recession of the ice cover. To continue growth, algae must adapt to the variable light field encountered in a mixed water column. Photoadaptation was studied in surface ice communities and in bottom ice communities.

Lizotte, M.P.

1989-01-01T23:59:59.000Z

67

An Objective Method for Measuring Surface Ice Accretion  

Science Conference Proceedings (OSTI)

An off-the-shelf ice detection system used primarily on aircraft was tested in a climatic chamber, and then in the field to evaluate its ability to estimate the amount of ice simultaneously accreting on various-sized cylinders. The climatic ...

Paul Tattelman

1982-04-01T23:59:59.000Z

68

Testing an Ice Storage System for Peak Load Reduction  

Science Conference Proceedings (OSTI)

Ice storage systems allow for the offset of peak building cooling power by allowing the building operator to choose a convenient window for making ice and then using that ice, rather than a traditional cooling system, to provide space cooling. For the past several years, the Electric Power Research Institute (EPRI) has tested the Ice Bear 30, a 30 ton-hour system designed to operate independently of the unitary system. This report describes the testing and its results, based on work performed at a field ...

2011-04-21T23:59:59.000Z

69

Skin supersolidity slipperizing ice  

E-Print Network (OSTI)

Consistency between theory predictions and measurements and calculations revealed that the skin of ice, containing water molecules with fewer than four neighbours, forms a supersolid phase that is highly polarized, elastic, hydrophobic, with ultra-low density and high thermal stability. The supersolidity of skin sliperizes ice.

Xi Zhang; Yongli Huang; a Zengsheng Ma; Yichun Zhou; Chang Q Sun

2013-10-03T23:59:59.000Z

70

Ice Cream with a Heart Create a new Clemson Ice  

E-Print Network (OSTI)

Ice Cream with a Heart Contest! Create a new Clemson Ice Cream flavor! Raise money for your favorite charity! Win a free Clemson Ice Cream party for your organization! Enter at www organizations. The contest is called Ice Cream with a Heart and its purpose is to help student organizations

Bolding, M. Chad

71

Fish Smother Under Ice  

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

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

72

Arctic Sea ice model sensitivities.  

SciTech Connect

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

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

2010-12-01T23:59:59.000Z

73

Winter Icing and Storms Project (WISP)  

Science Conference Proceedings (OSTI)

Field studies in support of the Winter Icing and Storms Project (WISP) were conducted in the Colorado Front Range area from 1 February to 31 March 1990(WISP90) and from 15 January to 5 April 1991 (WISP91). The main goals of the project are to ...

Roy Rasmussen; Marcia Politovich; Wayne Sand; Greg Stossmeister; Ben Bernstein; Kim Elmore; John Marwitz; John McGinley; John Smart; Ed Westwater; B. Boba Stankov; Roger Pielke; Steve Rutledge; Doug Wesley; Nick Powell; Don Burrows

1992-07-01T23:59:59.000Z

74

Vortex ice in nanostructured superconductors  

SciTech Connect

We demonstrate using numerical simulations of nanostructured superconductors that it is possible to realize vortex ice states that are analogous to square and kagome ice. The system can be brought into a state that obeys either global or local ice rules by applying an external current according to an annealing protocol. We explore the breakdown of the ice rules due to disorder in the nanostructure array and show that in square ice, topological defects appear along grain boundaries, while in kagome ice, individual defects appear. We argue that the vortex system offers significant advantages over other artificial ice systems.

Reichhardt, Charles [Los Alamos National Laboratory; Reichhardt, Cynthia J [Los Alamos National Laboratory; Libal, Andras J [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

75

Building Energy Software Tools Directory: Tools by Country -...  

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

control systems, plants, solar shading, daylight, ice rinks, pools, 3D, BIM, IFC, LEED, ASHRAE, BREEAM, NMF, Modelica. Software has been updated. ParaSol solar protection,...

76

CX-001272: Categorical Exclusion Determination | Department of...  

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

CX-001272: Categorical Exclusion Determination Install Photovoltaic Roof and Insulation System on Florissant Ice Rink CX(s) Applied: B5.1 Date: 11302009 Location(s):...

77

--No Title--  

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

B5.1 Actions to conserve energy Install photovoltaic roof and insulation system on Florissant Ice Rink Energy Efficiency and Conservation Block Program Install photovoltaic roof...

78

Using Satellite Data to Reduce Spatial Extent of Diagnosed Icing  

Science Conference Proceedings (OSTI)

Overprediction of the spatial extent of aircraft icing is a major problem in forecaster products based on numerical model output. Dependence on relative humidity fields, which are inherently broad and smooth, is the cause of this difficulty. ...

Gregory Thompson; Randy Bullock; Thomas F. Lee

1997-03-01T23:59:59.000Z

79

Evaluation of Several A-Train Ice Cloud Retrieval Products with In Situ Measurements Collected during the SPARTICUS Campaign  

Science Conference Proceedings (OSTI)

In this study several ice cloud retrieval products that utilize active and passive A-Train measurements are evaluated using in situ data collected during the Small Particles in Cirrus (SPARTICUS) field campaign. The retrieval datasets include ice ...

Min Deng; Gerald G. Mace; Zhien Wang; R. Paul Lawson

2013-04-01T23:59:59.000Z

80

Prediction of Vessel Icing  

Science Conference Proceedings (OSTI)

Vessel icing from wave-generated spray is a severe hazard to expanded marine operations in high latitudes. Hardships in making observations during operations, combined with differences in vessel type and heading, have resulted in great ...

J. E. Overland; C. H. Pease; R. W. Preisendorfer; A. L. Comiskey

1986-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Global Warming, Soot, Ice  

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

Global Warming, Soot, Ice Speaker(s): James Hansen Date: November 7, 2003 - 12:00pm Location: 90-3122 Irreversible "dangerous anthropogenic interference" with the climate system...

82

Sublimation of Ice Crystals  

Science Conference Proceedings (OSTI)

Recent experiments on the sublimation of single crystals of ice in an atmosphere of air indicate that the sublimation rate is diffusion limited and initially solid prismatic crystals evolve into time-independent shapes similar to confocal ...

Jon Nelson

1998-03-01T23:59:59.000Z

83

Global ice sheet modeling  

Science Conference Proceedings (OSTI)

The University of Maine conducted this study for Pacific Northwest Laboratory (PNL) as part of a global climate modeling task for site characterization of the potential nuclear waste respository site at Yucca Mountain, NV. The purpose of the study was to develop a global ice sheet dynamics model that will forecast the three-dimensional configuration of global ice sheets for specific climate change scenarios. The objective of the third (final) year of the work was to produce ice sheet data for glaciation scenarios covering the next 100,000 years. This was accomplished using both the map-plane and flowband solutions of our time-dependent, finite-element gridpoint model. The theory and equations used to develop the ice sheet models are presented. Three future scenarios were simulated by the model and results are discussed.

Hughes, T.J.; Fastook, J.L. [Univ. of Maine, Orono, ME (United States). Institute for Quaternary Studies

1994-05-01T23:59:59.000Z

84

DIFFRACTION STUDIES OF ICE Alexe BOSAK  

E-Print Network (OSTI)

as ice-nine [K. Vonnegut, Cat's Cradle] #12;Phase diagram of water #12;Phase diagram of water Here we areDIFFRACTION STUDIES OF ICE Alexeï BOSAK European Synchrotron Radiation Facility #12;Ice as the mild threat ice Ih the only ice in the crust #12;Ice as the absolute weapon Ice IX : melting point 45.8°C

Titov, Anatoly

85

Contractor SOW Template - ICE | Department of Energy  

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

SOW Template - ICE Contractor SOW Template - ICE Contractor SOW Template - ICE.pdf More Documents & Publications Contractor SOW Template - ICR Statement of Work (SOW) Template...

86

Ice cream headache  

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

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

87

Ice emission and the redshifts of submillimeter sources  

E-Print Network (OSTI)

Observations at submillimeter wavelengths have revealed a population of sources thought to be at relatively large redshifts. The position of the 850 $\\mu$m passband on the Rayleigh-Jeans portion of the Planck function leads to a maximum redshift estimate of $z\\sim$4.5 since sources will not retain their redshift independent brightness close to the peak of the Planck function and thus drop out of surveys. Here we review evidence that ice absorption is present in the spectra of local ultraluminous infrared galaxies which are often taken as analogs for the 850 $\\mu$m source population. We consider the implication of this absorption for ice induced spectral structure at far infrared wavelengths and present marginal astronomical evidence that amorphous ice may have a feature similar to crystalline ice near 150 $\\mu$m. Recent corroborative laboratory evidence is supportive of this conclusion. It is argued that early metal enrichment by pair instability SN may lead to a high ice content relative to refractory dust at high redshift and a fairly robust detection of ice emission in a $z=6.42$ quasar is presented. It is further shown that ice emission is needed to understand the 450 $\\mu$m sources observed in the GOODS-N field. We are thus encouraged to apply far infrared ice emission models to the available observations of HDF 850.1, the brightest submillimeter source in the {\\it Hubble Deep Field}. We suggest that a redshift as large as 13 may need to be considered for this source, nearly a factor of three above the usual top estimate. Inclusion of the possibility of far infrared ice emission in the spectral energy distributions of model sources generally broadens the range of redshifts to be considered for submillimeter sources compared to models without ice emission.

C. C. Dudley; M. Imanishi; P. R. Maloney

2008-02-12T23:59:59.000Z

88

Recent Great Lakes Ice Trends  

Science Conference Proceedings (OSTI)

Analysis of ice observations made by cooperative observers from shoreline stations reveals significant changes in the ice season on the North American Great Lakes over the past 35years. Although the dataset is highly inhomogeneous and year-to-...

Howard P. Hanson; Claire S. Hanson; Brenda H. Yoo

1992-05-01T23:59:59.000Z

89

ARM - Measurement - Ice water content  

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

to hear from you Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Ice water content The concentration (massvol) of ice water particles in a cloud....

90

Ice maker safety control  

Science Conference Proceedings (OSTI)

In a refrigeration apparatus including an evaporator, a defrost heater for defrosting the evaporator, a defrost thermostat having a switch for de-energizing the defrost heater at a preselected high temperature of the evaporator, and an ice making apparatus having a mold, a mold heater, and a control circuit controllably energized the mold heater, a safety control for the ice making apparatus is described comprising: means for thermally coupling the defrost thermostat with the mold; and means electrically connecting the defrost thermostat switch with the control circuit for de-energizing the mold heater at a preselected high temperature of the mold to prevent overheating thereof.

Linstromberg, W.J.

1988-05-03T23:59:59.000Z

91

Magnetic Monopoles in Spin Ice  

E-Print Network (OSTI)

Electrically charged particles, such as the electron, are ubiquitous. By contrast, no elementary particles with a net magnetic charge have ever been observed, despite intensive and prolonged searches. We pursue an alternative strategy, namely that of realising them not as elementary but rather as emergent particles, i.e., as manifestations of the correlations present in a strongly interacting many-body system. The most prominent examples of emergent quasiparticles are the ones with fractional electric charge e/3 in quantum Hall physics. Here we show that magnetic monopoles do emerge in a class of exotic magnets known collectively as spin ice: the dipole moment of the underlying electronic degrees of freedom fractionalises into monopoles. This enables us to account for a mysterious phase transition observed experimentally in spin ice in a magnetic field, which is a liquid-gas transition of the magnetic monopoles. These monopoles can also be detected by other means, e.g., in an experiment modelled after the celebrated Stanford magnetic monopole search.

Claudio Castelnovo; Roderich Moessner; Shivaji L. Sondhi

2007-10-30T23:59:59.000Z

92

Dry Ice vs. Pipette Experiment Description  

E-Print Network (OSTI)

Dry Ice vs. Pipette Experiment Description Dry ice (solid) is put into the bulb of a pipette, plastic pipette 1 ice cube sized piece of dry ice Butter knife (or some object to break dry ice) Gloves (surgical gloves will not work, they must protect hands from dry ice) Safety glasses for demonstrator

93

Ice–Ice Collisions: An Ice Multiplication Process in Atmospheric Clouds  

Science Conference Proceedings (OSTI)

Ice in atmospheric clouds undergoes complex physical processes, interacting especially with radiation, which leads to serious impacts on global climate. After their primary production, atmospheric ice crystals multiply extensively by secondary ...

J.-I. Yano; V. T. J. Phillips

2011-02-01T23:59:59.000Z

94

THE SPITZER ICE LEGACY: ICE EVOLUTION FROM CORES TO PROTOSTARS  

Science Conference Proceedings (OSTI)

Ices regulate much of the chemistry during star formation and account for up to 80% of the available oxygen and carbon. In this paper, we use the Spitzer c2d Legacy ice survey, complimented with data sets on ices in cloud cores and high-mass protostars, to determine standard ice abundances and to present a coherent picture of the evolution of ices during low- and high-mass star formation. The median ice composition H{sub 2}O:CO:CO{sub 2}:CH{sub 3}OH:NH{sub 3}:CH{sub 4}:XCN is 100:29:29:3:5:5:0.3 and 100:13:13:4:5:2:0.6 toward low- and high-mass protostars, respectively, and 100:31:38:4:-:-:- in cloud cores. In the low-mass sample, the ice abundances with respect to H{sub 2}O of CH{sub 4}, NH{sub 3}, and the component of CO{sub 2} mixed with H{sub 2}O typically vary by ice components, XCN, and CH{sub 3}OH vary by factors 2-10 between the lower and upper quartile. The XCN band correlates with CO, consistent with its OCN{sup -} identification. The origin(s) of the different levels of ice abundance variations are constrained by comparing ice inventories toward different types of protostars and background stars, through ice mapping, analysis of cloud-to-cloud variations, and ice (anti-)correlations. Based on the analysis, the first ice formation phase is driven by hydrogenation of atoms, which results in an H{sub 2}O-dominated ice. At later prestellar times, CO freezes out and variations in CO freezeout levels and the subsequent CO-based chemistry can explain most of the observed ice abundance variations. The last important ice evolution stage is thermal and UV processing around protostars, resulting in CO desorption, ice segregation, and the formation of complex organic molecules. The distribution of cometary ice abundances is consistent with the idea that most cometary ices have a protostellar origin.

Oeberg, Karin I. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02139 (United States); Boogert, A. C. Adwin [IPAC, NASA Herschel Science Center, California Institute of Technology, Pasadena, CA 91125 (United States); Pontoppidan, Klaus M. [Space Telescope Science Institute, Baltimore, MD 21218 (United States); Van den Broek, Saskia; Van Dishoeck, Ewine F. [Leiden Observatory, Leiden University, 2300 RA Leiden (Netherlands); Bottinelli, Sandrine [Centre d'Etude Spatiale des Rayonnements (CESR), CNRS-UMR 5187, 31028 Toulouse Cedex 4 (France); Blake, Geoffrey A. [California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA 91125 (United States); Evans, Neal J. [Department of Astronomy, University of Texas at Austin, Austin, TX 78712 (United States)

2011-10-20T23:59:59.000Z

95

ICE Cleaning Test Report.PDF  

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

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

96

Hail ice impact on composite structures at glancing angles  

E-Print Network (OSTI)

investigation of high velocity ice impacts on woven carbon/and ice sphere. .by trailing ice fragments. ..

Funai, Sho

2012-01-01T23:59:59.000Z

97

Insulator Calculation Engine (ICE) 1.00 (for program 35.011 funders)  

Science Conference Proceedings (OSTI)

ICE determines the electric field (E-field) distribution on transmission line polymer insulators (also called NCI or composite insulators) and aids in the selection of the appropriate corona ...

2011-12-10T23:59:59.000Z

98

PRE-SW Insulator Calculation Engine (ICE) Version 2.0, Beta  

Science Conference Proceedings (OSTI)

ICE determines the electric field (E-field) distribution on transmission line polymer insulators (also called NCI or composite insulators) and aids in the selection of the appropriate corona ...

2013-09-08T23:59:59.000Z

99

A Modeling Study of the Influence of Ice Scavenging on the Chemical Composition of Liquid-Phase Precipitation of a Cumulonimbus Cloud  

Science Conference Proceedings (OSTI)

Evidence of the efficient removal of chemicals by ice particles has been deduced from past field experiments and laboratory studies. However, the ice phase has been poorly represented in prior cloud chemistry modeling. This paper uses a two-...

Nicole Audiffren; Sylvie Cautenet; Nadine Chaumerliac

1999-08-01T23:59:59.000Z

100

CO ICE PHOTODESORPTION: A WAVELENGTH-DEPENDENT STUDY  

SciTech Connect

UV-induced photodesorption of ice is a non-thermal evaporation process that can explain the presence of cold molecular gas in a range of interstellar regions. Information on the average UV photodesorption yield of astrophysically important ices exists for broadband UV lamp experiments. UV fields around low-mass pre-main-sequence stars, around shocks and in many other astrophysical environments are however often dominated by discrete atomic and molecular emission lines. It is therefore crucial to consider the wavelength dependence of photodesorption yields and mechanisms. In this work, for the first time, the wavelength-dependent photodesorption of pure CO ice is explored between 90 and 170 nm. The experiments are performed under ultra high vacuum conditions using tunable synchrotron radiation. Ice photodesorption is simultaneously probed by infrared absorption spectroscopy in reflection mode of the ice and by quadrupole mass spectrometry of the gas phase. The experimental results for CO reveal a strong wavelength dependence directly linked to the vibronic transition strengths of CO ice, implying that photodesorption is induced by electronic transition (DIET). The observed dependence on the ice absorption spectra implies relatively low photodesorption yields at 121.6 nm (Ly{alpha}), where CO barely absorbs, compared to the high yields found at wavelengths coinciding with transitions into the first electronic state of CO (A{sup 1}{Pi} at 150 nm); the CO photodesorption rates depend strongly on the UV profiles encountered in different star formation environments.

Fayolle, Edith C.; Linnartz, Harold [Sackler Laboratory for Astrophysics, Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden (Netherlands); Bertin, Mathieu; Romanzin, Claire; Michaut, Xavier; Fillion, Jean-Hugues [Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique, Universite Pierre et Marie Curie-Paris 6, CNRS UMR7092, 75005 Paris (France); Oeberg, Karin I. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)

2011-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Image Content Engine (ICE)  

SciTech Connect

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

Brase, J M

2007-03-26T23:59:59.000Z

102

Surface Melting over Ice Shelves and Ice Sheets as Assessed from Modeled Surface Air Temperatures  

Science Conference Proceedings (OSTI)

Summer surface melting plays an important role in the evolution of ice shelves and their progenitor ice sheets. To explore the magnitude of surface melt occurring over modern ice shelves and ice sheets in a climate scenario forced by ...

Jeremy G. Fyke; Lionel Carter; Andrew Mackintosh; Andrew J. Weaver; Katrin J. Meissner

2010-04-01T23:59:59.000Z

103

The Spitzer ice legacy: Ice evolution from cores to protostars  

E-Print Network (OSTI)

Ices regulate much of the chemistry during star formation and account for up to 80% of the available oxygen and carbon. In this paper, we use the Spitzer c2d ice survey, complimented with data sets on ices in cloud cores and high-mass protostars, to determine standard ice abundances and to present a coherent picture of the evolution of ices during low- and high-mass star formation. The median ice composition H2O:CO:CO2:CH3OH:NH3:CH4:XCN is 100:29:29:3:5:5:0.3 and 100:13:13:4:5:2:0.6 toward low- and high-mass protostars, respectively, and 100:31:38:4:-:-:- in cloud cores. In the low-mass sample, the ice abundances with respect to H2O of CH4, NH3, and the component of CO2 mixed with H2O typically vary by ice components, XCN and CH3OH vary by factors 2-10 between the lower and upper quartile. The XCN band correlates with CO, consistent with its OCN- identification. The origin(s) of the different levels of ice abundance variations are cons...

Oberg, Karin I; Pontoppidan, Klaus M; Broek, Saskia van den; van Dishoeck, Ewine F; Bottinelli, Sandrine; Blake, Geoffrey A; Evans, Neal J

2011-01-01T23:59:59.000Z

104

Ice slurry cooling research: Storage tank ice agglomeration and extraction  

DOE Green Energy (OSTI)

A new facility has been built to conduct research and development on important issues related to implementing ice slurry cooling technology. Ongoing studies are generating important information on the factors that influence ice particle agglomeration in ice slurry storage tanks. The studies are also addressing the development of methods to minimize and monitor agglomeration and improve the efficiency and controllability of tank extraction of slurry for distribution to cooling loads. These engineering issues impede the utilization of the ice slurry cooling concept that has been under development by various groups.

Kasza, K. [Argonne National Lab., IL (United States); Hayashi, Kanetoshi [NKK Corp., Kawasaki (Japan)

1999-08-01T23:59:59.000Z

105

Climate Impacts of Ice Nucleation  

SciTech Connect

Several different ice nucleation parameterizations in two different General Circulation Models are used to understand the effects of ice nucleation on the mean climate state, and the climate effect of aerosol perturbations to ice clouds. The simulations have different ice microphysical states that are consistent with the spread of observations. These different states occur from different parameterizations of the ice cloud nucleation processes, and feature different balances of homogeneous and heterogeneous nucleation. At reasonable efficiencies, consistent with laboratory measurements and constrained by the global radiative balance, black carbon has a small (-0.06 Wm?2) and not statistically significant climate effect. Indirect effects of anthropogenic aerosols on cirrus clouds occur mostly due to increases in homogeneous nucleation fraction as a consequence of anthropogenic sulfur emissions. The resulting ice indirect effects do not seem strongly dependent on the ice micro-physical balance, but are slightly larger for those states with less homogeneous nucleation in the base state. The total ice AIE is estimated at 0.26±0.09 Wm?2 (1? uncertainty). This represents an offset of 20-30% of the simulated total Aerosol Indirect Effect for ice and liquid clouds.

Gettelman, A.; Liu, Xiaohong; Barahona, Donifan; Lohmann, U.; Chen, Chih-Chieh

2012-10-19T23:59:59.000Z

106

Backhand tecniques in ice hockey.  

E-Print Network (OSTI)

??The main objective of this project based multimedia thesis is to show video material of how to use a backhand side of the ice hockey… (more)

Luoma, Matti

2012-01-01T23:59:59.000Z

107

Modeling of Ice Accretion on Wires  

Science Conference Proceedings (OSTI)

A time-dependent numerical model of ice accretion on wires, such as overhead conductors, is presented. Simulations of atmospheric icing are made with the model in order to examine the dependence of the accreted ice amount on atmospheric ...

Lasse Makkonen

1984-06-01T23:59:59.000Z

108

ICE Raids: Compounding Production, Contradiction, and Capitalism  

E-Print Network (OSTI)

is just a cheap way of boosting ICE ‘criminal alien’ arrestRegardless of whether or not ICE is motivated by maintainingWorkers in America: Factories and ICE Raids Produce Citizens

Reas, Elizabeth I

2009-01-01T23:59:59.000Z

109

Climate, Ocean and Sea Ice Modeling  

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

Climate, Ocean and Sea Ice Modeling (COSIM) Summary The COSIM project develops advanced ocean and ice models for evaluating the role of ocean and ice in high-latitude climate...

110

Virtual Floe Ice Drift Forecast Model Intercomparison  

Science Conference Proceedings (OSTI)

Both sea ice forecast models and methods to measure their skill are needed for operational sea ice forecasting. Two simple sea ice models are described and tested here. Four different measures of skill are also tested. The forecasts from the ...

Robert W. Grumbine

1998-09-01T23:59:59.000Z

111

Theory of amorphous ices  

E-Print Network (OSTI)

We use large-deviation theory to study nonequilibrium transitions between amorphous solids and liquid in an atomistic model of supercooled water. Along with nonequilibrium transitions between the ergodic liquid and two distinct amorphous solids, we establish coexistence between the two amorphous solids, a finding that is consistent with experiment. The phase diagram we predict includes a nonequilibrium triple point where the two amorphous phases and the liquid coexist. While the amorphous solids are long-lived and slowly-aging glasses, their melting leads quickly to the formation of ice. This irreversible behavior is demonstrated in our theoretical treatment and compared with experiment.

David T Limmer; David Chandler

2013-06-20T23:59:59.000Z

112

BISICLES Captures Details of Retreating Antarctic Ice  

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

BISICLES Captures Details of Retreating Antarctic Ice BISICLES Captures Details of Retreating Antarctic Ice March 30, 2013 | Tags: Climate Research, Hopper, Math & Computer Science...

113

Biogeochemistry in Sea Ice: CICE model developments  

SciTech Connect

Polar primary production unfolds in a dynamic sea ice environment, and the interactions of sea ice with ocean support and mediate this production. In spring, for example, fresh melt water contributes to the shoaling of the mixed layer enhancing ice edge blooms. In contrast, sea ice formation in the fall reduces light penetration to the upper ocean slowing primary production in marine waters. Polar biogeochemical modeling studies typically consider these types of ice-ocean interactions. However, sea ice itself is a biogeochemically active medium, contributing a significant and, possibly, essential source of primary production to polar regions in early spring and fall. Here we present numerical simulations using the Los Alamos Sea Ice Model (CICE) with prognostic salinity and sea ice biogeochemistry. This study investigates the relationship between sea ice multiphase physics and sea ice productivity. Of particular emphasis are the processes of gravity drainage, melt water flushing, and snow loading. During sea ice formation, desalination by gravity drainage facilitates nutrient exchange between ocean and ice maintaining ice algal blooms in early spring. Melt water flushing releases ice algae and nutrients to underlying waters limiting ice production. Finally, snow loading, particularly in the Southern Ocean, forces sea ice below the ocean surface driving an upward flow of nutrient rich water into the ice to the benefit of interior and freeboard communities. Incorporating ice microphysics in CICE has given us an important tool for assessing the importance of these processes for polar algal production at global scales.

Jeffery, Nicole [Los Alamos National Laboratory; Hunke, Elizabeth [Los Alamos National Laboratory; Elliott, Scott [Los Alamos National Laboratory; Turner, Adrian [Los Alamos National Laboratory

2012-06-18T23:59:59.000Z

114

Snowmelt on the Greenland Ice Sheet as Derived from Passive Microwave Satellite Data  

Science Conference Proceedings (OSTI)

The melt extent of the snow on the Greenland ice sheet is of considerable importance to the ice sheet’s mass and energy balance, as well as Arctic and global climates. By comparing passive microwave satellite data to field observations, ...

Waleed Abdalati; Konrad Steffen

1997-02-01T23:59:59.000Z

115

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

E-Print Network (OSTI)

2. Ice Shelves . . . . . . . . . . . . . . . . .5. Ice Rheology . . . . . . . . . . . . . 6.vi Calving Glaciers and Ice

Bassis, Jeremy N.

2007-01-01T23:59:59.000Z

116

Passive solar roof ice melter  

Science Conference Proceedings (OSTI)

An elongated passive solar roof ice melter is placed on top of accumulated ice and snow including an ice dam along the lower edge of a roof of a heated building and is held against longitudinal movement with respect to itself. The melter includes a bottom wall having an upper surface highly absorbent to radiant solar energy; a first window situated at right angles with respect to the bottom wall, and a reflecting wall connecting the opposite side edges of the bottom wall and the first window. The reflecting wall has a surface facing the bottom wall and the window which is highly reflective to radiant solar energy. Radiant solar energy passes through the first window and either strikes the highly absorbent upper surface of the bottom wall or first strikes the reflecting wall to be reflected down to the upper surface of the bottom wall. The heat generated thereby melts through the ice below the bottom wall causing the ice dam to be removed between the bottom wall and the top of the roof and immediately adjacent to the ice melter along the roof. Water dammed up by the ice dam can then flow down through this break in the dam and drain out harmlessly onto the ground. This prevents dammed water from seeping back under the shingles and into the house to damage the interior of the house.

Deutz, R.T.

1981-09-29T23:59:59.000Z

117

Enhanced and Oriented Riming of Growing Ice Crystals  

Science Conference Proceedings (OSTI)

Geometrically oriented riming was found in Formvar resin replicas of columnar ice crystals collected in cumulus clouds at ?6°C during an aircraft field program in Texas. Rimed cloud droplets were found either on the ends of the crystals or in a ...

William G. Finnegan; Steven K. Chai; Andrew Detwiler

2004-08-01T23:59:59.000Z

118

Modeled Variations of Precipitation over the Greenland Ice Sheet  

Science Conference Proceedings (OSTI)

A parameterization of the synoptic activity at 500 hPa and a simple orographic scheme are used to model the spatial and temporal variations of precipitation over the Greenland Ice Sheet for 1963–88 from analyzed geopotential height fields ...

David H. Bromwich; Frank M. Robasky; Richard A. Keen; John F. Bolzan

1993-07-01T23:59:59.000Z

119

Characterization of Aircraft Icing Environments with Supercooled Large Drops for Application to Commercial Aircraft Certification  

Science Conference Proceedings (OSTI)

Observations of aircraft icing environments that included supercooled large drops (SLD) greater than 100 ?m in diameter have been analyzed. The observations were collected by instrumented research aircraft from 134 flights during six field ...

Stewart G. Cober; George A. Isaac

2012-02-01T23:59:59.000Z

120

A Comparison of the Water Budgets between Clouds from AMMA and TWP-ICE  

Science Conference Proceedings (OSTI)

Two field campaigns, the African Monsoon Multidisciplinary Analysis (AMMA) and the Tropical Warm Pool–International Cloud Experiment (TWP-ICE), took place in 2006 near Niamey, Niger, and Darwin, Northern Territory, Australia, providing extensive ...

Xiping Zeng; Wei-Kuo Tao; Scott W. Powell; Robert A. Houze Jr.; Paul Ciesielski; Nick Guy; Harold Pierce; Toshihisa Matsui

2013-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Large-Scale Oceanographic Constraints on the Distribution of Melting and Freezing under Ice Shelves  

Science Conference Proceedings (OSTI)

Previous studies suggest that ice shelves experience asymmetric melting and freezing. Topography may constrain oceanic circulation (and thus basal melt–freeze patterns) through its influence on the potential vorticity (PV) field. However, melting ...

Christopher M. Little; Anand Gnanadesikan; Robert Hallberg

2008-10-01T23:59:59.000Z

122

Variability of Microphysical Parameters in High-Altitude Ice Clouds: Results of the Remote Sensing Method  

Science Conference Proceedings (OSTI)

The remote sensing method for retrieving vertical profiles of microphysical parameters in ice clouds from ground-based measurements taken by the Doppler radar and IR radiometer was applied to several cloud cases observed during different field ...

Sergey Y. Matrosov

1997-06-01T23:59:59.000Z

123

Ice_slurry_fact_sheet  

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

new approach to saving stroke and cardiac arrest victims by using a specially engineered ice slurry to cool organs. The technology is also being investigated as a way to improve...

124

Method of forming clathrate ice  

DOE Patents (OSTI)

A method of forming clathrate ice in a supercooled water-based liquid contained in a vessel is disclosed. Initially, an oscillator device is located in the liquid in the vessel. The oscillator device is then oscillated ultrasonically so that small crystals are formed in the liquid. These small crystals serve as seed crystals for ice formation in the liquid and thereby prevent supercooling of the liquid. Preferably, the oscillating device is controlled by a thermostat which initiates operation of the oscillator device when the temperature of the liquid is lowered to the freezing point. Thereafter, the operation of the oscillator device is terminated when ice is sensed in the liquid by an ice sensor.

Hino, Toshiyuki (Tokyo, JP); Gorski, Anthony J. (Lemont, IL)

1987-01-01T23:59:59.000Z

125

Method of forming calthrate ice  

DOE Patents (OSTI)

A method of forming clathrate ice in a supercooled water-based liquid contained in a vessel is disclosed. Initially, an oscillator device is located in the liquid in the vessel. The oscillator device is then oscillated ultransonically so that small crystals are formed in the liquid. Thes small crystals serve as seed crystals for ice formation in the liquid and thereby prevent supercooling of the liquid. Preferably, the oscillating device is controlled by a thermostat which initiates operation of the oscillator device when the temperature of the liquid is lowered to the freezing point. Thereafter, the operation of the oscillator device is terminated when ice is sensed in the liquid by an ice sensor.

Hino, T.; Gorski, A.J.

1985-09-30T23:59:59.000Z

126

Melting of Ice under Pressure  

SciTech Connect

The melting of ice under pressure is investigated with a series of first principles molecular dynamics simulations. In particular, a two-phase approach is used to determine the melting temperature of the ice-VII phase in the range of 10 to 50 GPa. Our computed melting temperatures are consistent with existing diamond anvil cell experiments. We find that for pressures between 10 to 40 GPa, ice melts as a molecular solid. For pressures above {approx}45 GPa there is a sharp increase in the slope of the melting curve due to the presence of molecular dissociation and proton diffusion in the solid, prior to melting. The onset of significant proton diffusion in ice-VII as a function of increasing temperature is found to be gradual and bears many similarities to that of a type-II superionic solid.

Schwegler, E; Sharma, M; Gygi, F; Galli, G

2008-07-31T23:59:59.000Z

127

An Inverse Method for Tracking Ice Motion in the Marginal Ice Zone Using Sequential Satellite Images  

Science Conference Proceedings (OSTI)

A new method for tracking ice motion and estimating ocean surface currents from sequential satellite images is presented. It is particularly suited for the marginal ice zone. A simple ice advection model, driven by wind and surface currents, is ...

Mark Buehner; Keith R. Thompson; Ingrid Peterson

1997-12-01T23:59:59.000Z

128

Effects of Surface Roughness and Surface Energy on Ice Adhesion ...  

Science Conference Proceedings (OSTI)

Ice adheres to steel surfaces when the environment temperature is low. In many cases, ice formation on surfaces is unwanted; therefore, anti-icing techniques ...

129

ICR-ICE Standard Operating Procedures | Department of Energy  

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

ICR-ICE Standard Operating Procedures ICR-ICE Standard Operating Procedures ICE-ICR SOP.pdf More Documents & Publications External Independent Review (EIR) Standard Operating...

130

Title: Radar-observed convective characteristics during TWP-ICE  

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

Title: Radar-observed convective characteristics during TWP-ICE Title: Radar-observed convective characteristics during TWP-ICE Schumacher, Courtney Texas A&M University Houze, Robert University of Washington May, Peter Bureau or Meteorology Research Centre Frederick, Kaycee Cetrone, Jasmine Vallgren, Andreas Category: Field Campaigns This poster will describe the radar dataset obtained in the Tropical Warm Pool International Cloud Experiment (TWP-ICE), which is to take place 20 January - 14 February 2006 in the vicinity of Darwin, Australia. We will describe the convective systems observed during the project by two scanning C-band Doppler radars, one of which will provide dual-polarization measurements, and ARM's vertically pointing cloud radar and lidar installations. In addition, we will discuss the potential for combining

131

ON THE FORMATION OF INTERSTELLAR WATER ICE: CONSTRAINTS FROM A SEARCH FOR HYDROGEN PEROXIDE ICE IN MOLECULAR CLOUDS  

SciTech Connect

Recent surface chemistry experiments have shown that the hydrogenation of molecular oxygen on interstellar dust grains is a plausible formation mechanism, via hydrogen peroxide (H{sub 2}O{sub 2}), for the production of water (H{sub 2}O) ice mantles in the dense interstellar medium. Theoretical chemistry models also predict the formation of a significant abundance of H{sub 2}O{sub 2} ice in grain mantles by this route. At their upper limits, the predicted and experimental abundances are sufficiently high that H{sub 2}O{sub 2} should be detectable in molecular cloud ice spectra. To investigate this further, laboratory spectra have been obtained for H{sub 2}O{sub 2}/H{sub 2}O ice films between 2.5 and 200 {mu}m, from 10 to 180 K, containing 3%, 30%, and 97% H{sub 2}O{sub 2} ice. Integrated absorbances for all the absorption features in low-temperature H{sub 2}O{sub 2} ice have been derived from these spectra. For identifying H{sub 2}O{sub 2} ice, the key results are the presence of unique features near 3.5, 7.0, and 11.3 {mu}m. Comparing the laboratory spectra with the spectra of a group of 24 protostars and field stars, all of which have strong H{sub 2}O ice absorption bands, no absorption features are found that can definitely be identified with H{sub 2}O{sub 2} ice. In the absence of definite H{sub 2}O{sub 2} features, the H{sub 2}O{sub 2} abundance is constrained by its possible contribution to the weak absorption feature near 3.47 {mu}m found on the long-wavelength wing of the 3 {mu}m H{sub 2}O ice band. This gives an average upper limit for H{sub 2}O{sub 2}, as a percentage of H{sub 2}O, of 9% {+-} 4%. This is a strong constraint on parameters for surface chemistry experiments and dense cloud chemistry models.

Smith, R. G.; Wright, C. M.; Robinson, G. [School of Physical, Environmental and Mathematical Sciences, University of New South Wales, Australian Defence Force Academy, Canberra, ACT 2600 (Australia); Charnley, S. B. [Astrochemistry Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Pendleton, Y. J. [NASA Lunar Science Institute, NASA Ames Research Center, Moffett Field, CA 94035 (United States); Maldoni, M. M., E-mail: r.smith@adfa.edu.au, E-mail: c.wright@adfa.edu.au, E-mail: g.robinson@adfa.edu.au, E-mail: Steven.B.Charnley@nasa.gov, E-mail: yvonne.pendleton@nasa.gov [Geoscience Australia, Canberra, ACT 2601 (Australia)

2011-12-20T23:59:59.000Z

132

Ice Energy | Open Energy Information  

Open Energy Info (EERE)

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

133

Phase-field Simulation of Solidification Microstructure Evolution in ...  

Science Conference Proceedings (OSTI)

A Phase Field Finite Element Approach to Simulate Shape Memory Actuators .... Two-dimensional Numerical Study on the Growth of Sea Ice Crystals with ...

134

Phase Field Simulations of Brittle Fracture in Composites with ...  

Science Conference Proceedings (OSTI)

A phase field model is used to study crack propagation in such materials. ... A Comparison of Coulombic and Plastic Shear Faults in Ice · A General Approach to ...

135

Relative Dispersion of Ice Crystals in Seeded Cumuli  

Science Conference Proceedings (OSTI)

Relative dispersion of ice crystals was measured in 30 seeded cumulus clouds. A quasi-instantaneous, vertical area source of ice was generated by releasing dry-ice pellets from an airplane. The ice concentration distribution and relative ...

Jeffrey C. Weil; R. Paul Lawson; Alfred R. Rodi

1993-06-01T23:59:59.000Z

136

Rheology of Discrete Failure Regimes of Anisotropic Sea Ice  

Science Conference Proceedings (OSTI)

A rheological model of sea ice is presented that incorporates the orientational distribution of ice thickness in leads embedded in isotropic floe ice. Sea ice internal stress is determined by coulombic, ridging and tensile failure at orientations ...

Alexander V. Wilchinsky; Daniel L. Feltham

2012-07-01T23:59:59.000Z

137

Global ice cloud observations: radiative properties and statistics from moderate-resolution imaging spectroradiometer measurements  

E-Print Network (OSTI)

Ice clouds occur quite frequently, yet so much about these clouds is unknown. In recent years, numerous investigations and field campaigns have been focused on the study of ice clouds, all with the ultimate goal of gaining a better understanding of microphysical and optical properties, as well as determining the radiative impact. Perhaps one of the most recognized instruments used for such research is the Moderate-resolution Imaging Spectroradiometer (MODIS), carried aboard the NASA EOS satellites Terra and Aqua. The present research aims to support ongoing efforts in the field of ice cloud research by use of observations obtained from Terra and Aqua MODIS. First, a technique is developed to infer ice cloud optical depth from the MODIS cirrus reflectance parameter. This technique is based on a previous method developed by Meyer et al. (2004). The applicability of the algorithm is demonstrated with retrievals from level-2 and -3 MODIS data. The technique is also evaluated with the operational MODIS cloud retrieval product and a method based on airborne ice cloud observations. From this technique, an archive of daily optical depth retrievals is constructed. Using simple statistics, the global spatial and temporal distributions of ice clouds are determined. Research has found that Aqua MODIS observes more frequent ice clouds and larger optical depths and ice water paths than does Terra MODIS. Finally, an analysis of the time series of daily optical depth values revealed that ice clouds at high latitudes, which are most likely associated with synoptic scale weather sytems, persist long enough to move with the upper level winds. Tropical ice clouds, however, dissipate more rapidly, and are in all likelihood associated with deep convective cells.

Meyer, Kerry Glynne

2007-08-01T23:59:59.000Z

138

ICE Solar | Open Energy Information  

Open Energy Info (EERE)

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

139

Performance of a stand-alone wind-electric ice maker for remote villages  

DOE Green Energy (OSTI)

Two ice makers in the 1.1 metric tons per 24 hours (1.2 tons per day) size range were tested to determine their performance when directly coupled to a variable-frequency wind turbine generator. Initial tests were conducted using a dynamometer to simulate to wind to evaluate whether previously determined potential problems were significant and to define basic performance parameters. Field testing in Norman, Oklahoma, was completed to determine the performance of one of the ice makers under real wind conditions. As expected, the ice makers produced more ice at a higher speed than rated, and less ice at a lower speed. Due to the large start-up torque requirement of reciprocating compressors, the ice making system experienced a large start-up current and corresponding voltage drop which required a larger wind turbine that expected to provide the necessary current and voltage. Performance curves for ice production and power consumption are presented. A spreadsheet model was constructed to predict ice production at a user-defined site given the wind conditions for that location. Future work should include long-term performance tests and research on reducing the large start-up currents the system experiences when first coming on line.

Davis, H.C. [National Renewable Energy Lab., Golden, CO (United States); Brandemuehl, M.J. [University of Colorado, Boulder, CO (United States). Joint Center for Energy Management; Bergey, M.L.S. [Bergey Windpower Co., Norman, OK (United States)

1995-01-01T23:59:59.000Z

140

Topological defects from doping and quenched disorder in artificial ice systems  

SciTech Connect

We examine the ice-rule obeying and ice-rule breaking vertices in an artificial spin ice system created using magnetic vortices in type-II superconductors with nanostructured pinning arrays. We show that this system can be doped by changing the external field to move the number of vortices away from commensurability and create sites that contain two or zero vortices. For a square ice, the doping leads to the formation of a grain boundary of vertices that do not obey the ice rules. In commensurate systems where the ice rules are obeyed, we can introduce random disorder at the individual pinning sites to create regions where vortices may not be able to flip from one side of the trap to another. For weak disorder, all of the vertices still obey the ice rules, while at intermediate levels of disorder we find grain boundaries of vertices which do not obey the ice rules. For strong disorder it is possible to create isolated paired vertices that do not obey the ice rules. In summary, we have shown that an artificial square ice can be created using vortices in a type-II superconductor interacting with a periodic array of pinning sites where each site has a double well potential. By defining the direction of the effective spin according to the side of the double well occupied by the vortex, we find that this system obeys the ice rules for square ice. We add disorder to the system in the form of randomness of the height of the potential barrier at the center of the well, and obtain vertex configurations using a rotating drive protocol which is similar to the shaking ac magnetic field used in nanomagnetic systems. For weak disorder the entire system still obeys the square ice rules. For intermediate disorder, ice-rule breaking vertices appear and form grain boundaries, while for strong disorder there are both gain boundaries and isolated paired defects. In a system with uniform potential barrier heights, we introduce disorder by moving away from commensurability and creating Home pinning sites that contain two or zero vortices. In this case we find grain boundaries that emanate from the defect site and span the sample.

Reichhardt, Charles [Los Alamos National Laboratory; Reichhardt, Cynthia J [Los Alamos National Laboratory; Libal, A [BABES-BOLYAI UNIV

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Modeling Sea Ice Transport Using Incremental Remapping  

Science Conference Proceedings (OSTI)

Sea ice models contain transport equations for the area, volume, and energy of ice and snow in various thickness categories. These equations typically are solved with first-order-accurate upwind schemes, which are very diffusive; with second-...

William H. Lipscomb; Elizabeth C. Hunke

2004-06-01T23:59:59.000Z

142

Quantum Ice : a quantum Monte Carlo study  

E-Print Network (OSTI)

Ice states, in which frustrated interactions lead to a macroscopic ground-state degeneracy, occur in water ice, in problems of frustrated charge order on the pyrochlore lattice, and in the family of rare-earth magnets collectively known as spin ice. Of particular interest at the moment are "quantum spin ice" materials, where large quantum fluctuations may permit tunnelling between a macroscopic number of different classical ground states. Here we use zero-temperature quantum Monte Carlo simulations to show how such tunnelling can lift the degeneracy of a spin or charge ice, stabilising a unique "quantum ice" ground state --- a quantum liquid with excitations described by the Maxwell action of 3+1-dimensional quantum electrodynamics. We further identify a competing ordered "squiggle" state, and show how both squiggle and quantum ice states might be distinguished in neutron scattering experiments on a spin ice material.

Nic Shannon; Olga Sikora; Frank Pollmann; Karlo Penc; Peter Fulde

2011-05-20T23:59:59.000Z

143

Why Sequence Lake Vostok accretion ice?  

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

Sequence Lake Vostok accretion ice? Lake Vostok is the largest known subglacial lake in central Antarctica, though it's been buried under 4 kilometers (nearly 2.5 miles) of ice for...

144

Microsoft Word - IceMountainFinal.docx  

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

Tumbled-down boulders, called talus, on Ice Mountain's north- western slope collect ice during the winter. In the summer, cold air flows out of vents in the base of the talus,...

145

Icing Conditions Encountered by a Research Aircraft  

Science Conference Proceedings (OSTI)

The characteristics of clouds which have led to airframe icing on an instrumented Beechcraft Super King Air are summarized. The icing encounters occurred at altitudes from 0–8000 m MSL, in summer and winter, in stratiform and cumuliform clouds, ...

Wayne R. Sand; William A. Cooper; Marcia K. Politovich; Donald L. Veal

1984-10-01T23:59:59.000Z

146

Ice Formation in Gas-Diffusion Layers  

E-Print Network (OSTI)

of California. Ice Formation in Gas-Diffusion Layers Thomasconditions, ice forms in the gas-diffusion layer (GDL) of areaction of reactant gases (1). A number of strategies exist

Dursch, Thomas

2013-01-01T23:59:59.000Z

147

Ice Crystal Replication with Common Plastic Solutions  

Science Conference Proceedings (OSTI)

Use of common plastics, i.e., polystyrene, Plexiglas (polymethyl methacrylate) and Lexan (polycarbonate), was investigated for ice crystal replication. The results suggest that all common plastics tested are usable for ice crystal replication ...

Tsuneya Takahashi; Norihiko Fukuta

1988-02-01T23:59:59.000Z

148

Airplane Instrument to Detect Ice Particles  

Science Conference Proceedings (OSTI)

A simple instrument that detects ice particles has been developed for use in airplane studies of thunderstorms. Although sophisticated instruments are available for imaging atmospheric ice particles, the spatial resolution of the particle ...

J. J. Jones; C. Grotbeck; B. Vonnegut

1989-08-01T23:59:59.000Z

149

Light Scattering by Single Natural Ice Crystals  

Science Conference Proceedings (OSTI)

During the South Pole Ice Crystal Experiment, angular scattering intensities (ASIs) of single ice crystals formed in natural conditions were measured for the first time with the polar nephelometer instrument. The microphysical properties of the ...

Valery Shcherbakov; Jean-François Gayet; Brad Baker; Paul Lawson

2006-05-01T23:59:59.000Z

150

Off peak ice storage generation  

DOE Green Energy (OSTI)

Due to the high costs associated with peak demand charges imposed by most electrical companies today, various means of shifting the peak HVAC load have been identified by the industry. This paper discusses the results of a study based upon a building site located in the high desert of the southwestern United States that evaluated ice storage as a mechanism of operating cost reductions. The discussion addresses both the seasonal and the annual cost and energy impacts of an ice storage system when used in place of an air-to-air heat pump system.

Davis, R.E.; Cerbo, F.J.

1985-01-01T23:59:59.000Z

151

Sound Scattering from Sea Ice: Aspects Relevant to Ice-Draft Profiling by Sonar  

Science Conference Proceedings (OSTI)

Accurate discrimination between thin ice and open water using sonar is an important practical concern for the calibration of ice-draft observations and for the use of ice-profiling sonar in climate-related studies of sea ice. To guide improvement ...

Humfrey Melling

1998-08-01T23:59:59.000Z

152

Smoothed particle hydrodynamics non-Newtonian model for ice-sheet and ice-shelf dynamics  

Science Conference Proceedings (OSTI)

We propose a new three-dimensional smoothed particle hydrodynamics (SPH) non-Newtonian model to study coupled ice-sheet and ice-shelf dynamics. Most existing ice-sheet numerical models use grid-based Eulerian discretizations, and are usually restricted ... Keywords: Grounding line, Ice sheet, Non-Newtonian fluid, Smoothed particle hydrodynamics

W. Pan, A. M. Tartakovsky, J. J. Monaghan

2013-06-01T23:59:59.000Z

153

ICE™ and ICE/T™: tools to assist in compiler design and implementation  

Science Conference Proceedings (OSTI)

ICE (Intermediate Code Engine) and ICE/T (ICE/Translator) are compiler back ends that execute on a Java Virtual Machine (JVM). They allow the student to complete a working compiler quickly and can execute on any platform that supplies a JVM. ICE is a ... Keywords: back-end, compiler, project, translator

Truman Parks Boyer; Mohsen Chitsaz

2004-12-01T23:59:59.000Z

154

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

E-Print Network (OSTI)

on the ground surface as snow- drift and the ice sheet during a growing phase, with a mixing ratio of the localGas isotopes in ice reveal a vegetated central Greenland during ice sheet invasion R. Souchez,1 J prevailing during build-up of the Greenland Ice Sheet (GIS) are not yet established. Here we use results from

Chappellaz, Jérôme

155

Application in Advanced Laparoscopic Procedures: Medical Ice...  

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

Applications Homeland Security Applications Biomedical Applications Medical Ice Slurry Coolants for Inducing Targeted-OrganTissue Protective Cooling Technology...

156

SPECIALREPORT95-18 Structural Ice Control  

E-Print Network (OSTI)

described in this review are not limited to confluence ice situations. A second phase of the work unit will examine and select confluences with known ice problems for detailed analysis. A third phase will combineSPECIALREPORT95-18 Structural Ice Control Review of Existing Methods Andrew M. Tuthill July 1995

157

Medical ice slurry production device  

DOE Patents (OSTI)

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

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

2008-06-24T23:59:59.000Z

158

Calmac Ice Storage Test report  

DOE Green Energy (OSTI)

The Ice Storage Test Facility (ISTF) is designed to test commercial ice storage systems. Calmac provided a storage tank equipped with coils designed for use with a secondary fluid system. The Calmac ice storage system was tested over a wide range of operating conditions. Measured system performance during charging was similar to that reported by the manufacturer. Both the measured average and minimum brine temperatures were in close agreement with Calmac's literature values, and the ability to fully charge the tank was relatively unaffected by charging rate and brine flow rate. During discharge cycles, the storage tank outlet temperature was strongly affected by the discharge rate. The discharge capacity was dependent upon both the selected discharge rate and maximum allowable tank outlet temperature. Based on these tests, storage tank selection must depend most strongly on the discharge conditions required to serve the load. This report describes Calmac system performance fully under both charging and discharging conditions. Companion reports describe ISTF test procedures and ice-making efficiency test results that are common to many of the units tested. 11 refs., 31 figs., 9 tabs.

Stovall, T.K.

1991-08-01T23:59:59.000Z

159

FEM analysis of in-flight ice break-up  

Science Conference Proceedings (OSTI)

Using a fracture mechanics framework, this paper presents a finite element method to simulate the break-up of ice accreted on the wings of aircraft. The fully automated ice break-up module is integrated in FENSAP-ICE [1,2], which is an in-flight ice ... Keywords: Finite element methods, Fracture mechanics, Ice break-up, Ice shedding, In-flight icing, Multi-physics phenomenon

Shiping Zhang; Oubai El Kerdi; Rooh A. Khurram; Wagdi G. Habashi

2012-09-01T23:59:59.000Z

160

Ice Initiation by Aerosol Particles: Measured and Predicted Ice Nuclei Concentrations versus Measured Ice Crystal Concentrations in an Orographic Wave Cloud  

Science Conference Proceedings (OSTI)

The initiation of ice in an isolated orographic wave cloud was compared with expectations based on ice nucleating aerosol concentrations and with predictions from new ice nucleation parameterizations applied in a cloud parcel model. Measurements ...

T. Eidhammer; P. J. DeMott; A. J. Prenni; M. D. Petters; C. H. Twohy; D. C. Rogers; J. Stith; A. Heymsfield; Z. Wang; K. A. Pratt; K. A. Prather; S. M. Murphy; J. H. Seinfeld; R. Subramanian; S. M. Kreidenweis

2010-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Minimizing Discomfort during the injection of Radiesse™ with the use of either local anesthetic or ice  

E-Print Network (OSTI)

Comite SL, Storwick GS. Ice minimizes discomfort associatedeither local anesthetic or ice Stephen Comite MD 1 , Alexisinvolves the use of an ice cube for anesthesia. Ice has been

Comite, Stephen; Greene, Alexis; Cieszynski, Sabina A; Zaroovabeli, Pauline; Marks, Karen

2007-01-01T23:59:59.000Z

162

Hydrogen ICE Vehicle Testing Activities  

DOE Green Energy (OSTI)

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

J. Francfort; D. Karner

2006-04-01T23:59:59.000Z

163

Insulator Calculation Engine (ICE) 1.00 (for funders of Program 35.012)  

Science Conference Proceedings (OSTI)

ICE determines the electric field (E-field) distribution on transmission line polymer insulators (also called NCI or composite insulators) and aids in the selection of the appropriate corona ring.Benefits & ValueDetermine the appropriate application of corona rings on transmission line polymer insulators enabling life expectancy.Simple data entry of information selected from pre-populated structure, insulator and hardware ...

2012-12-10T23:59:59.000Z

164

Secondary Ice Nucleus Generation by Silver Iodide Applied to the Ground  

Science Conference Proceedings (OSTI)

Ice nuclei were monitored, using the membrane filter technique at eight sites around the 17-km perimeter of a rough circle and at one site in a 40 ha wheat field within the circle. The wheat field was then sprayed in fine weather with 2000 1 of ...

E. K. Bigg

1988-04-01T23:59:59.000Z

165

PRE-SW Insulator Calculation Engine (ICE) Version 2.0, Beta  

Science Conference Proceedings (OSTI)

ICE determines the electric field (E-field) distribution on transmission line polymer insulators (also called NCI or composite insulators) and aids in the selection of the appropriate corona ring.Benefits & Value:Determine the appropriate application of corona rings on transmission line polymer insulators enabling life expectancy.Simple data entry of information selected from pre-populated structure, insulator and hardware ...

2013-09-08T23:59:59.000Z

166

2, 4378, 2006 Ice-driven CO2  

E-Print Network (OSTI)

- dred thousand years, CO2 and ice volume (marine 18 O) have varied in phase both at the 41 000-yearCPD 2, 43­78, 2006 Ice-driven CO2 feedback on ice volume W. F. Ruddiman Title Page Abstract Discussions is the access reviewed discussion forum of Climate of the Past Ice-driven CO2 feedback on ice

Paris-Sud XI, Université de

167

VOLATILE TRANSPORT INSIDE SUPER-EARTHS BY ENTRAPMENT IN THE WATER-ICE MATRIX  

SciTech Connect

Whether volatiles can be entrapped in a background matrix composing planetary envelopes and be dragged via convection to the surface is a key question in understanding atmospheric fluxes, cycles, and composition. In this paper, we consider super-Earths with an extensive water mantle (i.e., water planets), and the possibility of entrapment of methane in their extensive water-ice envelopes. We adopt the theory developed by van der Waals and Platteeuw for modeling solid solutions, often used for modeling clathrate hydrates, and modify it in order to estimate the thermodynamic stability field of a new phase called methane filled ice Ih. We find that in comparison to water ice VII the filled ice Ih structure may be stable not only at the high pressures but also at the high temperatures expected at the core-water mantle transition boundary of water planets.

Levi, A.; Podolak, M. [Department of Geophysics and Planetary Science, Tel Aviv University, Tel Aviv 69978 (Israel); Sasselov, D., E-mail: amitlevi.planetphys@gmail.com [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)

2013-05-20T23:59:59.000Z

168

Climate, Ocean and Sea Ice Modeling (COSIM)  

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

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

169

ice rheology in HadCM3  

E-Print Network (OSTI)

Abstract. We present results of an implementation of the Elastic Viscous Plastic (EVP) sea ice dynamics scheme into the Hadley Centre coupled ocean-atmosphere climate model HadCM3. Although the large-scale simulation of sea ice in HadCM3 is quite good with this model, the lack of a full dynamical model leads to errors in the detailed representation of sea ice and limits our confidence in its future predictions. We find that introducing the EVP scheme results in a worse initial simulation of the sea ice. This paper documents various enhancements made to improve the simulation, resulting in a sea ice simulation that is better than the original HadCM3 scheme overall. Importantly, it is more physically based and provides a more solid foundation for future development. We then consider the interannual variability of the sea ice in the new model and demonstrate improvements over the HadCM3 simulation. 1

W. M. Connolley; A. B. Keen; A. J. Mclaren

2006-01-01T23:59:59.000Z

170

Evaluating and Constraining Ice Cloud Parameterizations in CAM5 using Aircraft Measurements from the SPARTICUS Campaign  

Science Conference Proceedings (OSTI)

This study uses aircraft measurements of relative humidity and ice crystal size distribution collected in synoptic cirrus during the SPARTICUS (Small PARTicles In CirrUS) field campaign to evaluate and constrain ice cloud parameterizations in the Community Atmosphere Model version 5. The probability density function (PDF) of ice crystal number concentration (Ni) derived from high frequency (1 Hz) measurements features a strong dependence on ambient temperature. As temperature decreases from -35°C to -62°C, the peak in the PDF shifts from 10-20 L-1 to 200-1000 L-1, while the ice crystal number concentration shows a factor of 6-7 increase. Model simulations are performed with two different insitu ice nucleation schemes. One of the schemes can reproduce a clear increase of Ni with decreasing temperature, by using either an observation based ice nuclei spectrum or a classical theory based spectrum with a relatively low (5%-10%) maximum freezing ratio for dust aerosols. The simulation with the other scheme, which assumes a high maximum freezing ratio (100%), shows much weaker temperature dependence of Ni. Simulations are also performed to test empirical parameters related to water vapor deposition and the auto-conversion of ice crystals to snow. Results show that a value between 0.05 and 0.1 for the water vapor deposition coefficient and 250 um for the critical ice crystal size can produce good agreements between model simulation and the SPARTICUS measurements in terms of ice crystal number concentration and effective radius. The climate impact of perturbing these parameters is also discussed.

Zhang, Kai; Liu, Xiaohong; Wang, Minghuai; Comstock, Jennifer M.; Mitchell, David; Mishra, Subhashree; Mace, Gerald G.

2013-05-14T23:59:59.000Z

171

Dependence of Sea Ice Yield-Curve Shape on Ice Thickness  

Science Conference Proceedings (OSTI)

In this note, the authors discuss the contribution that frictional sliding of ice floes (or floe aggregates) past each other and pressure ridging make to the plastic yield curve of sea ice. Using results from a previous study that explicitly ...

Alexander V. Wilchinsky; Daniel L. Feltham

2004-12-01T23:59:59.000Z

172

Modeling Thermodynamic Ice–Ocean Interactions at the Base of an Ice Shelf  

Science Conference Proceedings (OSTI)

Models of ocean circulation beneath ice shelves are driven primarily by the heat and freshwater fluxes that are associated with phase changes at the ice–ocean boundary. Their behavior is therefore closely linked to the mathematical description of ...

David M. Holland; Adrian Jenkins

1999-08-01T23:59:59.000Z

173

A Thermodynamic Coupled Ice-Ocean Model of the Marginal Ice Zone  

Science Conference Proceedings (OSTI)

A coupled ice-ocean model for thermodynamic growth of sea ice suitable for coupling with a similar dynamic model is considered. The model is balanced locally in that no horizontal (or vertical) advection or diffusion of properties are considered. ...

Lars Petter Røed

1984-12-01T23:59:59.000Z

174

Assessment of Aircraft Icing Potential and Maximum Icing Altitude from Geostationary Meteorological Satellite Data  

Science Conference Proceedings (OSTI)

A satellite product that displays regions of aircraft icing potential, along with corresponding cloud-top heights, has been developed using data from the Geostationary Operational Environmental Satellite (GOES) imager and sounder. The icing ...

Gary P. Ellrod; Andrew A. Bailey

2007-02-01T23:59:59.000Z

175

Automated Ice-Tethered Profilers for Seawater Observations under Pack Ice in All Seasons  

Science Conference Proceedings (OSTI)

An automated, easily deployed Ice-Tethered Profiler (ITP) instrument system, developed for deployment on perennial sea ice in the polar oceans to measure changes in upper ocean water properties in all seasons, is described, and representative ...

R. Krishfield; J. Toole; A. Proshutinsky; M-L. Timmermans

2008-11-01T23:59:59.000Z

176

Ice Accretion on Wires and Anti-Icing Induced by Joule Effect  

Science Conference Proceedings (OSTI)

This study concerns both the formation of ice accreted around wires due to rotation from gravitational and aerodynamic forces, and the anti-icing induced by the Joule effect. The experiments have been carried out in an instrumented wind tunnel ...

P. Personne; J-F. Gayet

1988-02-01T23:59:59.000Z

177

Measurement of South Pole ice transparency with the IceCube LED calibration system  

E-Print Network (OSTI)

The IceCube Neutrino Observatory, approximately 1 km^3 in size, is now complete with 86 strings deployed in the Antarctic ice. IceCube detects the Cherenkov radiation emitted by charged particles passing through or created in the ice. To realize the full potential of the detector, the properties of light propagation in the ice in and around the detector must be well understood. This report presents a new method of fitting the model of light propagation in the ice to a data set of in-situ light source events collected with IceCube. The resulting set of derived parameters, namely the measured values of scattering and absorption coefficients vs. depth, is presented and a comparison of IceCube data with simulations based on the new model is shown.

IceCube Collaboration; M. G. Aartsen; R. Abbasi; Y. Abdou; M. Ackermann; J. Adams; J. A. Aguilar; M. Ahlers; D. Altmann; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; V. Baum; R. Bay; J. J. Beatty; S. Bechet; J. Becker Tjus; K. -H. Becker; M. Bell; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; A. Bernhard; D. Bertrand; D. Z. Besson; G. Binder; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; S. Bohaichuk; C. Bohm; D. Bose; S. Böser; O. Botner; L. Brayeur; A. M. Brown; R. Bruijn; J. Brunner; S. Buitink; M. Carson; J. Casey; M. Casier; D. Chirkin; B. Christy; K. Clark; F. Clevermann; S. Cohen; D. F. Cowen; A. H. Cruz Silva; M. Danninger; J. Daughhetee; J. C. Davis; C. De Clercq; S. De Ridder; P. Desiati; M. de With; T. DeYoung; J. C. Díaz-Vélez; M. Dunkman; R. Eagan; B. Eberhardt; J. Eisch; R. W. Ellsworth; S. Euler; P. A. Evenson; O. Fadiran; A. R. Fazely; A. Fedynitch; J. Feintzeig; T. Feusels; K. Filimonov; C. Finley; T. Fischer-Wasels; S. Flis; A. Franckowiak; R. Franke; K. Frantzen; T. Fuchs; T. K. Gaisser; J. Gallagher; L. Gerhardt; L. Gladstone; T. Glüsenkamp; A. Goldschmidt; G. Golup; J. A. Goodman; D. Góra; D. Grant; A. Groß; M. Gurtner; C. Ha; A. Haj Ismail; A. Hallgren; F. Halzen; K. Hanson; D. Heereman; P. Heimann; D. Heinen; K. Helbing; R. Hellauer; S. Hickford; G. C. Hill; K. D. Hoffman; R. Hoffmann; A. Homeier; K. Hoshina; W. Huelsnitz; P. O. Hulth; K. Hultqvist; S. Hussain; A. Ishihara; E. Jacobi; J. Jacobsen; G. S. Japaridze; K. Jero; O. Jlelati; B. Kaminsky; A. Kappes; T. Karg; A. Karle; J. L. Kelley; J. Kiryluk; F. Kislat; J. Kläs; S. R. Klein; J. -H. Köhne; G. Kohnen; H. Kolanoski; L. Köpke; C. Kopper; S. Kopper; D. J. Koskinen; M. Kowalski; M. Krasberg; G. Kroll; J. Kunnen; N. Kurahashi; T. Kuwabara; M. Labare; H. Landsman; M. J. Larson; M. Lesiak-Bzdak; J. Leute; J. Lünemann; J. Madsen; R. Maruyama; K. Mase; H. S. Matis; F. McNally; K. Meagher; M. Merck; P. Mészáros; T. Meures; S. Miarecki; E. Middell; N. Milke; J. Miller; L. Mohrmann; T. Montaruli; R. Morse; R. Nahnhauer; U. Naumann; H. Niederhausen; S. C. Nowicki; D. R. Nygren; A. Obertacke; S. Odrowski; A. Olivas; M. Olivo; A. O'Murchadha; L. Paul; J. A. Pepper; C. Pérez de los Heros; C. Pfendner; D. Pieloth; N. Pirk; J. Posselt; P. B. Price; G. T. Przybylski; L. Rädel; K. Rawlins; P. Redl; E. Resconi; W. Rhode; M. Ribordy; M. Richman; B. Riedel; J. P. Rodrigues; C. Rott; T. Ruhe; B. Ruzybayev; D. Ryckbosch; S. M. Saba; T. Salameh; H. -G. Sander; M. Santander; S. Sarkar; K. Schatto; M. Scheel; F. Scheriau; T. Schmidt; M. Schmitz; S. Schoenen; S. Schöneberg; L. Schönherr; A. Schönwald; A. Schukraft; L. Schulte; O. Schulz; D. Seckel; S. H. Seo; Y. Sestayo; S. Seunarine; C. Sheremata; M. W. E. Smith; M. Soiron; D. Soldin; G. M. Spiczak; C. Spiering; M. Stamatikos; T. Stanev; A. Stasik; T. Stezelberger; R. G. Stokstad; A. Stößl; E. A. Strahler; R. Ström; G. W. Sullivan; H. Taavola; I. Taboada; A. Tamburro; S. Ter-Antonyan; S. Tilav; P. A. Toale; S. Toscano; M. Usner; D. van der Drift; N. van Eijndhoven; A. Van Overloop; J. van Santen; M. Vehring; M. Voge; M. Vraeghe; C. Walck; T. Waldenmaier; M. Wallraff; R. Wasserman; Ch. Weaver; M. Wellons; C. Wendt; S. Westerhoff; N. Whitehorn; K. Wiebe; C. H. Wiebusch; D. R. Williams; H. Wissing; M. Wolf; T. R. Wood; C. Xu; D. L. Xu; X. W. Xu; J. P. Yanez; G. Yodh; S. Yoshida; P. Zarzhitsky; J. Ziemann; S. Zierke; A. Zilles; M. Zoll

2013-01-22T23:59:59.000Z

178

Siple Coast Ice Streams in a General Antarctic Ice Sheet Model  

Science Conference Proceedings (OSTI)

In an earlier paper by Verbitsky and Saltzman, a vertically integrated, high-resolution, nonlinearly viscous, nonisothermal ice sheet model was presented to calculate the “present-day” equilibrium regime of the Antarctic ice sheet. Steady-state ...

Mikhail Verbitsky

2005-07-01T23:59:59.000Z

179

IceT users' guide and reference.  

Science Conference Proceedings (OSTI)

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

Moreland, Kenneth D.

2009-06-01T23:59:59.000Z

180

IceT users' guide and reference.  

Science Conference Proceedings (OSTI)

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

Moreland, Kenneth D.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Alignment of fee Crystals due to Transient Electric Fields  

Science Conference Proceedings (OSTI)

The alignment of columnar ice crystals due to the electric field surrounding a moving charged object, such as an aircraft, is modeled. The model allows the conditions of charge, velocity, ambient electric field, and size and shape of crystal to ...

D. A. Burrows; J. L. Stith

1986-06-01T23:59:59.000Z

182

Microparticulate Ice Slurry For Renal Hypothermia: Laparoscopic...  

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

MICROPARTICULATE ICE SLURRY FOR RENAL HYPOTHERMIA : LAPAROSCOPIC PARTIAL NEPHRECTOMY IN A PORCINE MODEL Sergey Shikanov a * , Mark Wille a , Michael Large a , Aria Razmaria a ,...

183

Ice Fall Doctors 5, Changing Route  

E-Print Network (OSTI)

Base Camp. The recordings span a wide variety of topics from making and drinking chang to the work of Mount Everest's 'ice fall doctors'....

Loomis, Molly

184

Development of ice self-release mechanisms  

DOE Green Energy (OSTI)

This study reports the results of a series of experiments that investigated a thermal storage technology whereby slush ice is grown on a submerged cold surface, and the resultant growth of slush ice releases without auxiliary thermal or mechanical means. The process investigated consists of growing slush ice from an electrolyte solution of low molarity. The cold surface (substrate) upon which the slush ice forms is submerged in the bulk solution. As the buoyancy force on the ice crystals exceeds the adhesion of the slush ice to the cold surface, the slush ice is forced from the substrate and floats away to the top of the solution. The results of this study reveal the relative insensitivity of the growth rate of ice crystals to solution initial bulk concentration over the range of values tested and to concentration of electrolyte during accumulation of ice crystals. The critical parameter appears to be substrate temperature, which cannot be less than {approximately}2{degrees}C below the freezing point temperature of the solution, because apparent adhesion increases rapidly with decreasing substrate temperature. 1 ref., 6 figs., 7 tabs.

Stewart, W.E. Jr. (Missouri Univ., Independence, MO (USA). Energy Research Lab.)

1989-09-01T23:59:59.000Z

185

Sea ice mapping method for seawinds  

E-Print Network (OSTI)

Abstract—A sea ice mapping algorithm for SeaWinds is developed that incorporates statistical and spatial a priori information in a modified maximum a posteriori (MAP) framework. Spatial a priori data are incorporated in the loss terms of a Bayes risk formulation. Conditional distributions and priors for sea ice and ocean statistics are represented as empirical histograms that are forced to conform to a set of expected histograms via principal component filtering. Tuning parameters for the algorithm allow adjustments in the algorithm’s performance. Results of the algorithm exhibit high correlation with the Remund–Long sea ice mapping algorithm for SeaWinds and the Special Sensor Microwave/Imager National Aeronautics and Space Administration Team 30 % ice edge, and are verified with RADARSAT-1 ScanSAR imagery. The resulting sea ice maps exhibit high edge detail, preserve polynyas and ice bodies disjoint from the primary ice sheet, and thus are suitable for use with wind retrieval and sea ice studies. Principles employed in the algorithm may be of interest in other classification studies. Index Terms—Bayes method, maximum a posteriori (MAP), principal components, QuikSCAT, scatterometer, sea ice extent, SeaWinds. I.

Hyrum S. Anderson; Student Member; David G. Long; Senior Member

2005-01-01T23:59:59.000Z

186

Dynamics of colloidal particles in ice  

E-Print Network (OSTI)

We use X-ray Photon Correlation Spectroscopy (XPCS) to probe the dynamics of colloidal particles in polycrystalline ice. During freezing, the dendritic ice morphology and rejection of particles from the ice created regions of high-particle-density, where some of the colloids were forced into contact and formed disordered aggregates. We find that the particles in these high density regions underwent ballistic motion coupled with both stretched and compressed exponential decays of the intensity autocorrelation function, and that the particles' characteristic velocity increased with temperature. We explain this behavior in terms of ice grain boundary migration.

Melissa Spannuth; S. G. J. Mochrie; S. S. L. Peppin; J. S. Wettlaufer

2010-12-31T23:59:59.000Z

187

Ice hockey players' perceived legitimacy of aggression.  

E-Print Network (OSTI)

??Recent incidents of aggressive and violent behavior in professional ice hockey have caused many in and out of the sport world to again question the… (more)

Visek, Amanda J.

2004-01-01T23:59:59.000Z

188

Scouting technical skills in ice hockey.  

E-Print Network (OSTI)

??The main objective was to create an effective scouting tool to evaluate technical skills of an ice hockey player. The purpose was to provide an… (more)

Räihä, Tuukka

2012-01-01T23:59:59.000Z

189

Guide for organizing ice hockey events.  

E-Print Network (OSTI)

??The Purpose of making a Guide for Organizing Ice Hockey Events was to create an easy following guide for students at Vierumäki and other people… (more)

Maclean, Ross

2010-01-01T23:59:59.000Z

190

Therapeutic Hypothermia: Protective Cooling Using Medical Ice ...  

Emergency Responders More Time • Video: Laparoscopic Partial Nephrectomy with Ice Slurry as Coolant in the Porcine Model License Status: Available for ...

191

A Simplified Ice–Ocean Coupled Model for the Antarctic Ice Melt Season  

Science Conference Proceedings (OSTI)

In the Antarctic Ocean, sea ice melts mostly by warming of the ocean mixed layer through heat input (mainly solar radiation) in open water areas. A simplified ice–upper ocean coupled model is proposed in which sea ice melts only by the ocean heat ...

Kay I. Ohshima; Sohey Nihashi

2005-02-01T23:59:59.000Z

192

Air–Ice–Ocean Momentum Exchange. Part 1:Energy Transfer between Waves and Ice Floes  

Science Conference Proceedings (OSTI)

The energy exchange between ocean surface waves and ice floes in the marginal ice zone (MIZ) involves the scattering and attenuation of wave energy and the excitation of oscillation modes of the ice floes, as open ocean waves propagate into the ...

W. Perrie; Y. Hu

1996-09-01T23:59:59.000Z

193

Effects of Stochastic Ice Strength Perturbation on Arctic Finite Element Sea Ice Modeling  

Science Conference Proceedings (OSTI)

The ice strength parameter P* is a key parameter in dynamic/thermodynamic sea ice models that cannot be measured directly. Stochastically perturbing P* in the Finite Element Sea Ice–Ocean Model (FESOM) of the Alfred Wegener Institute aims at ...

Stephan Juricke; Peter Lemke; Ralph Timmermann; Thomas Rackow

2013-06-01T23:59:59.000Z

194

The Origin of Ice in Mountain Cap Clouds  

Science Conference Proceedings (OSTI)

Ice crystal development in relatively simple layer clouds was studied using airborne instrumentation. The patterns in the development of ice in those clouds suggest that the ice originates in association with the initial condensation process, ...

William A. Cooper; Gabor Vali

1981-06-01T23:59:59.000Z

195

The Origin and Concentration of Ice Crystals in Clouds  

Science Conference Proceedings (OSTI)

Ice crystals in supercooled clouds may form upon ice nuclei, or they may arise through secondary processes. Two of these secondary ice “multiplication” mechanisms are discussed in some detail: the rime-splintering process and the mechanical ...

S. C. Mossop

1985-03-01T23:59:59.000Z

196

A Novel and Low Cost Sea Ice Mass Balance Buoy.  

Science Conference Proceedings (OSTI)

The understanding of sea ice mass balance processes requires continuous monitoring of the seasonal evolution of the ice thickness. While autonomous ice mass balance buoys (IMB buoys) deployed over the past two decades have contributed to our ...

Keith Jackson; Jeremy Wilkinson; Ted Maksym; Justin Beckers; Christian Haas; David Meldrum; David Mackenzie

197

Black carbon aerosols and the third polar ice cap  

E-Print Network (OSTI)

EASE-Grid weekly snow cover and sea ice extent version 3.USA, National Snow and Ice Data Center, Digital media, 2005.climate forcing via snow and ice albedos, Proc. Natl. Acad.

Menon, Surabi

2010-01-01T23:59:59.000Z

198

Transporting & Shipping Hazardous Materials at LBNL: Dry Ice  

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

Dry Ice Dry ice is regulated as a hazardous material if shipped by air or water. Contact Shipping for any shipments that include dry ice (x5094, x4388, or shipping@lbl.gov)....

199

A Bulk Microphysics Parameterization with Multiple Ice Precipitation Categories  

Science Conference Proceedings (OSTI)

A single-moment bulk microphysics scheme with multiple ice precipitation categories is described. It has 2 liquid hydrometeor categories (cloud droplets and rain) and 10 ice categories that are characterized by habit, size, and density—two ice ...

Jerry M. Straka; Edward R. Mansell

2005-04-01T23:59:59.000Z

200

Bio-based Deicing/Anti-Icing Fluids  

This invention relates in general to compositions to remove ice, snow and/or frost ("frozen precipitation") from surfaces and/or to prevent ice from forming on surfaces, and in particular to deicing/anti-icing fluids.

Note: This page contains sample records for the topic "ice rink field" 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

A Heat Balance for the Bering Sea Ice Edge  

Science Conference Proceedings (OSTI)

Detailed oceanographic, meteorological and sea ice observations were obtained from the Bering Sea marginal ice zone (MIZ) during the February–March 1983 Marginal Ice Zone Experiment (MIZEX West). These data have been used in estimating a mean ...

Peter J. Hendricks; Robin D. Muench; Gilbert R. Stegen

1985-12-01T23:59:59.000Z

202

Atmospheric Icing Climatologies of Two New England Mountains  

Science Conference Proceedings (OSTI)

The atmospheric icing climatologies of two New England mountaintops with different elevations are compared: Mount Mansfield in northern Vermont and Mount Washington in New Hampshire. Atmospheric icing, as measured with Rosemount ice detectors, is ...

Charles C. Ryerson

1988-11-01T23:59:59.000Z

203

ADWICE: Advanced Diagnosis and Warning System for Aircraft Icing Environments  

Science Conference Proceedings (OSTI)

This paper describes the design of the Advanced Diagnosis and Warning System for Aircraft Icing Environments (ADWICE) and presents results for two different icing weather situations with typical icing conditions. ADWICE has been in development ...

A. Tafferner; T. Hauf; C. Leifeld; T. Hafner; H. Leykauf; U. Voigt

2003-04-01T23:59:59.000Z

204

Intercomparison of In-Flight Icing Algorithms. Part I: WISP94 Real-Time Icing Prediction and Evaluation Program  

Science Conference Proceedings (OSTI)

The purpose of the Federal Aviation Administration’s Icing Forecasting Improvement Program is to conduct research on icing conditions both in flight and on the ground. This paper describes a portion of the in-flight aircraft icing prediction ...

Gregory Thompson; Roelof T. Bruintjes; Barbara G. Brown; Frank Hage

1997-12-01T23:59:59.000Z

205

Assessment of Superstructure Ice Protection as Applied to Offshore Oil Operations Safety Ice Protection Technologies, Safety Enhancements, and Development Needs  

E-Print Network (OSTI)

Approved for public release; distribution is unlimited. COVER: Ice protection technologies—clockwise from upper left (reprinted with permission): 1. Feltwick Anti-Icing Grate from Innovative Dynamics Inc. 2. Ocean Bounty semi-submersible iced in Cook Inlet

Charles C. Ryerson April; Vacca Heater From Vacca Inc; Charles C. Ryerson

2009-01-01T23:59:59.000Z

206

under a Creative Commons License. Climate of the Past Modelling the Early Weichselian Eurasian Ice Sheets: role of ice  

E-Print Network (OSTI)

Abstract. During the last glaciation, a marine ice sheet repeatedly appeared in Eurasia. The floating part of this ice sheet was essential to its rapid extension over the seas. During the earliest stage (90 kyr BP), large ice-dammed lakes formed south of the ice sheet. These lakes are believed to have cooled the climate at the margin of the ice. Using an ice sheet model, we investigated the role of ice shelves during the inception and the influence of ice-dammed lakes on the ice sheet evolution. Inception in Barents sea seems due to thickening of a large ice shelf. We observe a substantial impact of the lakes on the evolution of the ice sheets. Reduced summer ablation enhances ice extent and thickness, and the deglaciation is delayed by 2000 years. 1

V. Peyaud; C. Ritz; G. Krinner

2007-01-01T23:59:59.000Z

207

A Parameterization of the Visible Extinction Coefficient of Ice Clouds in Terms of the Ice/Water Content  

Science Conference Proceedings (OSTI)

This article describes a parameterization of the visible extinction coefficient of cirrus and frontal ice cloud in terms of the ice/water content. The parameterization is based on the discovery that the ice cloud particle size spectra from a ...

C. Martin R. Platt

1997-08-01T23:59:59.000Z

208

Chairs: Ice, Ishikawa, Khounsary, Padmore, Shen Topic Speaker  

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

Chairs: Ice, Ishikawa, Khounsary, Padmore, Shen Topic Speaker Affiliation Session 1 8:30-10 Chair: G. Ice Maskless patterning Enzo Di Fabrizo Elettra, Trieste, Italy Possible...

209

ICE Press Office U.S. Department of Homeland Security  

E-Print Network (OSTI)

ICE Press Office U.S. Department of Homeland Security December 19, 2003 Contact: SEVP Fact Sheet) at (202) 353-3049. www.ice.gov #12;

Wisconsin at Madison, University of

210

SISIPHUS: Scalable Ice-Sheet Solvers and Infrastructure for Petascale...  

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

SISIPHUS: Scalable Ice-Sheet Solvers and Infrastructure for Petascale, High-Resolution, Unstructured Simulations SISIPHUS: Scalable Ice-Sheet Solvers and Infrastructure for...

211

Historical Carbon Dioxide Record from the Vostok Ice Core  

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

Vostok Ice Core Historical Carbon Dioxide Record from the Vostok Ice Core graphics Graphics data Data Investigators J.-M. Barnola, D. Raynaud, C. Lorius Laboratoire de Glaciologie...

212

ICR-ICE Standard Operating Procedures (Update Sept 2013) | Department...  

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

ICR-ICE Standard Operating Procedures (Update Sept 2013) ICR-ICE Standard Operating Procedures (Update Sept 2013) ICRICE SOPSep 2013Final.pdf More Documents & Publications...

213

Historical Carbon Dioxide Record from the Siple Station Ice Core  

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

Siple Station Ice Core Historical Carbon Dioxide Record from the Siple Station Ice Core graphics Graphics data Data Investigators A. Neftel, H. Friedli, E. Moor, H. Ltscher, H....

214

Laparoscopic Partial Nephrectomy with Ice Slurry as Coolant in...  

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

| Help | PrivacySecurity Notice Home > Capabilities > Biomedical Applications > Medical Ice Slurry Coolants > Laparoscopic Partial Nephrectomy with Ice Slurry as Coolant in the...

215

Observing Climate with Satellites Are We on Thin Ice?  

Science Conference Proceedings (OSTI)

Observing Climate with Satellites Are We on Thin Ice? A glacial-melt stream on the top of the Greenland ice sheet in late summer. ...

2010-10-05T23:59:59.000Z

216

Ice hockey instructor's guide for EC Dornbirner Bulldogs.  

E-Print Network (OSTI)

??The purpose of this thesis was to build an ice hockey instructor´s manual for Austrian ice hockey club EC Dornbirner Bulldogs. The manual consists of… (more)

Suomalainen, Juhani

2010-01-01T23:59:59.000Z

217

Maintenance of the Sea-Ice Edge  

Science Conference Proceedings (OSTI)

A coupled global climate model is used to evaluate processes that determine the equilibrium location of the sea-ice edge and its climatological annual cycle. The extent to which the wintertime ice edge departs from a symmetric ring around either ...

C. M. Bitz; M. M. Holland; E. C. Hunke; R. E. Moritz

2005-08-01T23:59:59.000Z

218

Ice Fall Doctors 6, Long Conversation  

E-Print Network (OSTI)

Ang Nima and Ang Kami discuss different elements of their lives as Ice Fall Doctors: what they like about the job; safety; what their wives think of the work; religion and how it keeps them safe in the ice; spirits in the Icefall and the surrounding...

Loomis, Molly

219

Passive ice freezing-releasing heat pipe  

DOE Patents (OSTI)

A heat pipe device has been developed which permits completely passive ice formation and periodic release of ice without requiring the ambient temperature to rise above the melting point of water. This passive design enables the maximum amount of cooling capacity to be stored in the tank.

Gorski, Anthony J. (Lemont, IL); Schertz, William W. (Batavia, IL)

1982-01-01T23:59:59.000Z

220

Modeling Linear Kinematic Features in Sea Ice  

Science Conference Proceedings (OSTI)

Sea ice deformation is localized in narrow zones of high strain rate that extend hundreds of kilometers, for example, across the Arctic Basin. This paper demonstrates that these failure zones may be modeled with a viscous–plastic sea ice model, ...

Jennifer K. Hutchings; Petra Heil; William D. Hibler III

2005-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

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

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

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

222

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

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

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

223

Recovery mechanisms of Arctic summer sea ice  

E-Print Network (OSTI)

[1] We examine the recovery of Arctic sea ice from prescribed ice?free summer conditions in simulations of 21st century climate in an atmosphere–ocean general circulation model. We find that ice extent recovers typically within two years. The excess oceanic heat that had built up during the ice?free summer is rapidly returned to the atmosphere during the following autumn and winter, and then leaves the Arctic partly through increased longwave emission at the top of the atmosphere and partly through reduced atmospheric heat advection from lower latitudes. Oceanic heat transport does not contribute significantly to the loss of the excess heat. Our results suggest that anomalous loss of Arctic sea ice during asinglesummerisreversible,astheice–albedo feedback is alleviated by large?scale recovery mechanisms. Hence, hysteretic threshold behavior (or a “tipping point”) is unlikely to occur during the decline of Arctic summer sea?

unknown authors

2011-01-01T23:59:59.000Z

224

Wind Turbines Under Atmospheric Icing Conditions - Ice Accretion Modeling, Aerodynamics, and Control Strategies for Mitigating Performance Degradation.  

E-Print Network (OSTI)

??This thesis presents a combined engineering methodology of ice accretion, airfoil data, and rotor performance analysis of wind turbines subject to moderate atmospheric icing conditions.… (more)

Brillembourg, Dwight

2013-01-01T23:59:59.000Z

225

JBluIce-EPICS control system for macromolecular crystallography.  

SciTech Connect

The trio of macromolecular crystallography beamlines constructed by the General Medicine and Cancer Institutes Collaborative Access Team (GM/CA-CAT) in Sector 23 of the Advanced Photon Source (APS) have been in growing demand owing to their outstanding beam quality and capacity to measure data from crystals of only a few micrometres in size. To take full advantage of the state-of-the-art mechanical and optical design of these beamlines, a significant effort has been devoted to designing fast, convenient, intuitive and robust beamline controls that could easily accommodate new beamline developments. The GM/CA-CAT beamline controls are based on the power of EPICS for distributed hardware control, the rich Java graphical user interface of Eclipse RCP and the task-oriented philosophy as well as the look and feel of the successful SSRL BluIce graphical user interface for crystallography. These beamline controls feature a minimum number of software layers, the wide use of plug-ins that can be written in any language and unified motion controls that allow on-the-fly scanning and optimization of any beamline component. This paper describes the ways in which BluIce was combined with EPICS and converted into the Java-based JBluIce, discusses the solutions aimed at streamlining and speeding up operations and gives an overview of the tools that are provided by this new open-source control system for facilitating crystallographic experiments, especially in the field of microcrystallography.

Stepanov, S.; Makarov, O.; Hilgart, M.; Pothineni, S.; Urakhchin, A.; Devarapalli, S.; Yoder, D.; Becker, M.; Ogata, C.; Sanishvili, R.; Nagarajan, V.; Smith, J. L.; Fischetti, R. F. (Biosciences Division); (Univ. of Michigan)

2011-01-01T23:59:59.000Z

226

Energy Cost Calculator for Commercial Ice Machines | Department of Energy  

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

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

227

Determining Greenland Ice Sheet sensitivity to regional climate change: one-way coupling of a 3-D thermo-mechanical ice sheet model with a mesoscale climate model  

E-Print Network (OSTI)

responsible almost 40% of the ice sheet’s total dischargeCurrently, no coupled Greenland Ice Sheet model experimentaccelerated melting of Greenland ice sheet, Science, v. 313,

Schlegel, Nicole-Jeanne

2011-01-01T23:59:59.000Z

228

Public Assembly | Open Energy Information  

Open Energy Info (EERE)

Assembly Assembly Jump to: navigation, search Building Type Public Assembly Definition Buildings in which people gather for social or recreational activities, whether in private or non-private meeting halls. Sub Categories social or meeting (e.g. community center, lodge, meeting hall, convention center, senior center); recreation (e.g. gymnasium, health club, bowling alley, ice rink, field house, indoor racquet sports); entertainment or culture (e.g. museum, theater, cinema, sports arena, casino, night club); library; funeral home; student activities center; armory; exhibition hall; broadcasting studio; transportation terminal References EIA CBECS Building Types [1] References ↑ EIA CBECS Building Types U.S. Energy Information Administration (Oct 2008)

229

Spatial patterns of ice storm disturbance in the forested landscape of Ouachita Mountains, Arkansas and Oklahoma  

E-Print Network (OSTI)

Large-extent ice storms have received relatively little attention from researchers. This research investigates the effects of abiotic and biotic factors on the spatial patterns of ice storm disturbance on a forested landscape. This investigation provides a landscape-level perspective on the impacts of ice storm disturbance, clarifies the effects on ecosystem dynamics, and will aid future forest management plans. The study was conducted in Ouachita National Forest (ONF) in west-central Arkansas and southeastern Oklahoma and examined approximately 6000 km2 of forest between 150 and 800 m elevation. Normalized Difference Vegeation Index (NDVI) difference values were calculated using two Landsat 7 ETM+ scenes to identify NDVI changes that potentially were associated with ice storm damage to the forests. Forty-six geolocated field sites were used to determine the relationship of NDVI difference to actual forest damage caused by the ice storm by counting the number of downed tree boles intersecting a 100 m transect. These field sites encompassed a broad range of each of the physical variables (i.e. elevation, slope, and aspect), forest type, and degree of damage. The linear regression model determined the relationship between NDVI difference and ice storm damage. Elevation, slope, and aspect were calculated based on individual pixels from the DEM. Categories of forest damage were based on NDVI difference values. A chi-square test of correspondence and Cramer’s V test were then used to analyze relationships of damage to abiotic and biotic variables. The strong, negative relationship observed in the linear regression model suggested that NDVI was representative of ice storm damage in the study area. The chi-square test of correspondence indicated the abiotic and biotic variables all had associations with NDVI difference results (pice storm damage followed closely by slope and aspect. Moderate elevations, moderate slopes, and windward aspects received the highest percentage of major storm damage. Forest type displayed a weak relationship with the extent of damage. The topographic patterns of ice storm damage are similar to patterns found in previous research. Topography influenced spatial patterns of ice storm damage. Elevation, slope, and aspect were all found to be important variables influencing the degree of ice storm damage. Knowledge concerning these spatial patterns is critical for future studies of ecosystem dynamics and forest management practices.

Isaacs, Rachel E.

2007-08-01T23:59:59.000Z

230

Ice Nuclei in Marine Air: Biogenic Particles or Dust?  

Science Conference Proceedings (OSTI)

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

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

2013-01-11T23:59:59.000Z

231

Learning to predict ice accretion on electric power lines  

Science Conference Proceedings (OSTI)

Ice accretion on power transmission and distribution lines is one of the major causes of power grid outages in northern regions. While such icing events are rare, they are very costly. Thus, it would be useful to predict how much ice will accumulate. ... Keywords: Ice accretion, Machine learning, NWP, SVM regression

Ashkan Zarnani; Petr Musilek; Xiaoyu Shi; Xiaodi Ke; Hua He; Russell Greiner

2012-04-01T23:59:59.000Z

232

Lollipops and Ice Fishing: Molecular Rulers Used to Probe ...  

Science Conference Proceedings (OSTI)

Lollipops and Ice Fishing: Molecular Rulers Used to Probe Nanopores. For Immediate Release: April 27, 2010. ...

2011-10-03T23:59:59.000Z

233

District cooling: Phase 2, Direct freeze ice slurry system testing  

DOE Green Energy (OSTI)

The objectives of this research are to: extend the range of pressure drop data for ice-water slurry flows, and design and build a prototypical ice slurry distribution system which demonstrates ice slurry handling at an end user's heat exchanger, without sending ice slurry directly through the heat exchanger. The results of Phase 1 work demonstrated a 40% reduction in pump power required to move an ice-water slurry versus the same mass flow of water only. In addition to lower pressure drop, pumping ice slurries is advantageous because of the large latent and sensible heat cooling capacity stored in the ice compared to only sensible heat in chilled water. For example, an ice-water slurry with a 20% ice fraction (by mass) has a mass flow rate that is 70% less than the mass flow rate required for a chilled water system cooling and equivalent load. The greatly reduced mass flow combined with the friction reducing effects of ice-water slurries results in a total savings of 83% in pumping power. Therefore, a substantial savings potential exists for capital costs and system operating costs in ice-water slurry district cooling systems. One potential disadvantage of an ice-slurry district cooling system is the introduction of ice into equipment not so designed, such as air handlers at end user locations. A prototypic ice slurry distribution loop will demonstrate a cooling network which will provide ice slurry to an end user but sends ice free water into the actual heat transfer.

Winters, P.J.

1991-01-02T23:59:59.000Z

234

Arctic Sea Ice Decline: Observations, Projections, Mechanisms, and Implications  

E-Print Network (OSTI)

or phase space. In this work we con- sider the trajectory of sea ice in the ice thickness phase space. We175 Arctic Sea Ice Decline: Observations, Projections, Mechanisms, and Implications Geophysical Is the Trajectory of Arctic Sea Ice? Harry L. Stern and Ronald W. Lindsay Polar Science Center, Applied Physics

Lindsay, Ron

235

3, 435467, 2007 Gas age-ice age  

E-Print Network (OSTI)

in the ice phase (using volcanic horizons) and in the gas phase (using rapid methane variations). We useCPD 3, 435­467, 2007 Gas age-ice age differences along the EPICA cores L. Loulergue et al. Title of the Past New constraints on the gas age-ice age difference along the EPICA ice cores, 0­50 kyr L. Loulergue

Paris-Sud XI, Université de

236

Global Ice and Land Climate Studies Using Scatterometer Image Data  

E-Print Network (OSTI)

in sea ice, and canopy leaf density--as well as by the phase state of water (meltwater on sea ice1 Global Ice and Land Climate Studies Using Scatterometer Image Data David G. Long Brigham Young CA 91109 ben@pacific.jpl.nasa.gov Sasan.Saatchi@jpl.nasa.gov Cheryl Bertoia U. S. National Ice Center

Long, David G.

237

Electrical Atomization of Water Dripping from Melting Ice Pieces and its Possible Role in Thunderstorms  

Science Conference Proceedings (OSTI)

When a small isolated ice piece of conical shape is suspended with its apex facing down between two horizontal parallel electrodes and an electric field of 1 to 1.6 kV cm?1 is applied between them with the lower electrode at negative potential, a ...

A. K. Kamra; D. V. Ahire

1984-05-01T23:59:59.000Z

238

The existence of memory effect on hydrogen ordering in ice: The effect makes ice attractive  

SciTech Connect

The existence of ferroelectric ice XI with ordered hydrogen in space becomes of interest in astronomy and physical chemistry because of the strong electrostatic force. However, the influence was believed to be limited because it forms in a narrow temperature range. From neutron diffraction experiments, we found that small hydrogen-ordered domains exist at significantly higher temperature and the domains induce the growth of 'bulk' ice XI. The small ordered domain is named 'memory' of hydrogen ordered ice because it is the residual structure of ice XI. Since the memory exists up to at least 111 K, most of ices in the solar system are hydrogen ordered and may have ferroelectricity. The small hydrogen-ordered domains govern the cosmochemical properties of ice and evolution of icy grains in the universe.

Chakoumakos, Bryan C [ORNL

2011-01-01T23:59:59.000Z

239

Neutron spectroscopy of high-density amorphous ice.  

DOE Green Energy (OSTI)

Vibrational spectra of high-density amorphous ice (hda-ice) for H{sub 2}O and D{sub 2}O samples were measured by inelastic neutron scattering. The measured spectra of hda-ice are closer to those for high-pressure phase ice-VI, but not for low-density ice-Ih. This result suggests that similar to ice-VI the structure of hda-ice should consist of two interpenetrating hydrogen-bonded networks having no hydrogen bonds between themselves.

Kolesnikov, A. I.

1998-07-17T23:59:59.000Z

240

Forecasting during the Lake-ICE/SNOWBANDS Field Experiments  

Science Conference Proceedings (OSTI)

Despite improvements in numerical weather prediction models, statistical models, forecast decision trees, and forecasting rules of thumb, human interpretation of meteorological information for a particular forecast situation can still yield a ...

Peter J. Sousounis; Greg E. Mann; George S. Young; Richard B. Wagenmaker; Bradley D. Hoggatt; William J. Badini

1999-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Smoothed particle hydrodynamics Non-Newtonian model for ice-sheet and ice-shelf dynamics  

SciTech Connect

Mathematical modeling of ice sheets is complicated by the non-linearity of the governing equations and boundary conditions. Standard grid-based methods require complex front tracking techniques and have limited capability to handle large material deformations and abrupt changes in bottom topography. As a consequence, numerical methods are usually restricted to shallow ice sheet and ice shelf approximations. We propose a new smoothed particle hydrodynamics (SPH) non-Newtonian model for coupled ice sheet and ice shelf dynamics. SPH, a fully Lagrangian particle method, is highly scalable and its Lagrangian nature and meshless discretization are well suited to the simulation of free surface ?ows, large material deformation, and material fragmentation. In this paper, SPH is used to study 3D ice sheet/ice shelf behavior, and the dynamics of the grounding line. The steady state position of the grounding line obtained from SPH simulations is in good agreement with laboratory observations for a wide range of simulated bedrock slopes, and density ratios, similar to those of ice and sea water. The numerical accuracy of the SPH algorithm is veri?ed by simulating Poiseuille ?ow, plane shear ?ow with free surface and the propagation of a blob of ice along a horizontal surface. In the laboratory experiment, the ice was represented with a viscous Newtonian ?uid. In the present work, however, the ice is modeled as both viscous Newtonian ?uid and non-Newtonian ?uid, such that the e?ect of non-Newtonian rheology on the dynamics of grounding line was examined. The non-Newtonian constitutive relation is prescribed to be Glen’s law for the creep of polycrystalline ice. A V-shaped bedrock ramp is further introduced to model the real geometry of bedrock slope.

Pan, Wenxiao; Tartakovsky, Alexandre M.; Monaghan, Joseph J.

2013-06-01T23:59:59.000Z

242

A Smoothed Particle Hydrodynamics Model for Ice Sheet and Ice Shelf Dynamics  

SciTech Connect

Mathematical modeling of ice sheets is complicated by the non-linearity of the governing equations and boundary conditions. Standard grid-based methods require complex front tracking techniques and have limited capability to handle large material deformations and abrupt changes in bottom topography. As a consequence, numerical methods are usually restricted to shallow ice sheet and ice shelf approximations. We propose a new smoothed particle hydrodynamics (SPH) model for coupled ice sheet and ice shelf dynamics. SPH is a fully Lagrangian particle method. It is highly scalable and its Lagrangian nature and meshless discretization are well suited to the simulation of free surface flows, large material deformation, and material fragmentation. In this paper SPH is used to study ice sheet/ice shelf behavior, and the dynamics of the grounding line. The steady state position of the grounding line obtained from the SPH simulations is in good agreement with laboratory observations for a wide range of simulated bedrock slopes, and density ratios similar to those of ice and sea water. The numerical accuracy of the SPH algorithm is further verified by simulating the plane shear flow of two immiscible fluids and the propagation of a highly viscous blob of fluid along a horizontal surface. In the experiment, the ice was represented with a viscous newtonian fluid. For consistency, in the described SPH model the ice is also modeled as a viscous newtonian fluid. Typically, ice sheets are modeled as a non-Newtonian fluid, accounting for the changes in the mechanical properties of ice. Implementation of a non-Newtonian rheology in the SPH model is the subject of our ongoing research.

Pan, Wenxiao; Tartakovsky, Alexandre M.; Monaghan, Joseph J.

2012-02-08T23:59:59.000Z

243

ICES Training programme The International Council for the Exploration of the Sea (ICES) offers courses led by high-profile scientists and  

E-Print Network (OSTI)

: +45 3338 6700 Fax: +45 3393 4215 info@ices.dk You can find more information about: ICES HQ here Hotels tuition fee. Organization The course is organized by the ICES Secretariat as part of the ICES Training

244

Laboratory Measurements of the Drag Force on a Family of Two-Dimensional Ice Keel Models in a Two-Layer Flow  

Science Conference Proceedings (OSTI)

A review of the upper structure of the Arctic Ocean and its overlying ice cover suggests that significant potential exists for the generation of internal wave fields by the deeper drafts of the pressure ridge keels. Laboratory measurements are ...

H. D. Pite; D. R. Topham; B. J. van Hardenberg

1995-12-01T23:59:59.000Z

245

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

E-Print Network (OSTI)

changes. This weak coupling can lead to a ``nonlinear phase locking'' of the different ice sheets whichA ``triple sea-ice state'' mechanism for the abrupt warming and synchronous ice sheet collapses. [1] Abrupt, switch-like, changes in sea ice cover are proposed as a mechanism for the large

Sayag, Roiy

246

Aircraft Measurements of Icing in Supercooled and Water Droplet/Ice Crystal Clouds  

Science Conference Proceedings (OSTI)

Icing measurements were carried out in Spain during the Precipitation Enhancement Project experiment in 1979, with an instrumented DC-7 aircraft.

M. Bain; J. F. Gayet

1982-05-01T23:59:59.000Z

247

Nailing Down Ice in a Cloud Model  

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

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

248

PSU BEN & JERRY'S STUDENT ICE CREAM CATERING  

E-Print Network (OSTI)

DIY Sundae Student Sundae Party Do you want it delivered? We will bring your order right to your door. This is a complete DIY Ice Cream Sundae Extravaganza, just for PSU students! Pick 3 flavors and 3 toppings, we

249

Aggregation of Ice Crystals in Cirrus  

Science Conference Proceedings (OSTI)

Results are given from analysis of the aggregation of thick plate, columnar, and bullet rosette ice crystals in cirrus. Data were obtained from PMS 2D-C images, oil coated slides, and aircraft meteorological measurements. Crystal size ranged from ...

Masahiro Kajikawa; Andrew J. Heymsfield

1989-10-01T23:59:59.000Z

250

Ice Crystal Production by Mountain Surfaces  

Science Conference Proceedings (OSTI)

Evidence is presented for a process of ice crystal generation in supercooled orographic clouds in contact with snow-covered mountain surfaces. Comparisons of the crystal concentrations at the surface with aircraft sampling indicate that the “...

David C. Rogers; Gabor Vali

1987-09-01T23:59:59.000Z

251

Radar and Radiation Properties of Ice Clouds  

Science Conference Proceedings (OSTI)

The authors derive relations of the equivalent radar reflectivity Ze and extinction coefficient ? of ice clouds and confirm the theory by in situ aircraft observations during the First International Satellite Cloud Climatology Project Regional ...

David Atlas; Sergey Y. Matrosov; Andrew J. Heymsfield; Ming-Dah Chou; David B. Wolff

1995-11-01T23:59:59.000Z

252

GELISOLS GEOCHEMISTRY OF SNOW AND ICE ... - Springer  

Science Conference Proceedings (OSTI)

and poses a serious risk to dam stability (Richardson and Reynolds, 2000b). Average rates of subsidence due to melting of buried ice in the moraine dam at Imja.

253

Observations of the Askaryan Effect in Ice  

E-Print Network (OSTI)

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

ANITA collaboration; P. W. Gorham; S. W. Barwick; J. J. Beatty; D. Z. Besson; W. R. Binns; C. Chen; P. Chen; J. M. Clem; A. Connolly; P. F. Dowkontt; M. A. DuVernois; R. C. Field; D. Goldstein; A. Goodhue; C. Hast; C. L. Hebert; S. Hoover; M. H. Israel; J. Kowalski; J. G. Learned; K. M. Liewer; J. T. Link; E. Lusczek; S. Matsuno; B. Mercurio; C. Miki; P. Miocinovic; J. Nam; C. J. Naudet; J. Ng; R. Nichol; K. Palladino; K. Reil; A. Romero-Wolf; M. Rosen; D. Saltzberg; D. Seckel; G. S. Varner; D. Walz; F. Wu

2006-11-03T23:59:59.000Z

254

Aircraft Icing Caused by Large Supercooled Droplets  

Science Conference Proceedings (OSTI)

The characteristic of aircraft icing environments containing large supercooled droplets are described. Substantial loss in rate of climb capability can result from less than 10 minutes duration in conditions where fewer than 0.1–1 cm?3 of ...

Marcia K. Politovich

1989-09-01T23:59:59.000Z

255

Ice Formation in Gas-Diffusion Layers  

SciTech Connect

Under sub-freezing conditions, ice forms in the gas-diffusion layer (GDL) of a proton exchange membrane fuel cell (PEMFC) drastically reducing cell performance. Although a number of strategies exist to prevent ice formation, there is little fundamental understanding of the mechanisms of freezing within PEMFC components. Differential scanning calorimetry (DSC) is used to elucidate the effects of hydrophobicity (Teflon® loading) and water saturation on the rate of ice formation within three commercial GDLs. We find that as the Teflon® loading increases, the crystallization temperature decreases due to a change in internal ice/substrate contact angle, as well as the attainable level of water saturation. Classical nucleation theory predicts the correct trend in freezing temperature with Teflon® loading.

Dursch, Thomas; Radke, Clayton J.; Weber, Adam Z.

2010-07-10T23:59:59.000Z

256

Observations of the Askaryan Effect in Ice  

SciTech Connect

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

Gorham, P.W.

2007-01-16T23:59:59.000Z

257

Radiative Forcing of Climate By Ice-Age Atmospheric Dust  

E-Print Network (OSTI)

During glacial periods, dust deposition rates and inferred atmospheric concentrations were globally much higher than present. According to recent model results, the large enhancement of atmospheric dust content at the last glacial maximum (LGM) can be explained only if increases in the potential dust source areas are taken into account. Such increases are to be expected, due to e#ects of low precipitation and low atmospheric (CO 2 ) on plant growth. Here the modelled three-dimensional dust fields from Mahowald et al. and modelled seasonally varying surface-albedo fields derived in a parallel manner, are used to quantify the mean radiative forcing due to modern (non-anthropogenic) and LGM dust. The e#ect of mineralogical provenance on the radiative properties of the dust is taken into account, as is the range of optical properties associated with uncertainties about the mixing state of the dust particles. The high-latitude (poleward of 45#) mean change in forcing (LGM minus modern) is estimated to be small (--0.9 to +0.2 W m ), especially when compared to nearly --20 W m due to reflection from the extended ice sheets. Although the net e#ect of dust over ice sheets is a positive forcing (warming), much of the simulated high-latitude dust was not over the ice sheets, but over unglaciated regions close to the expanded dust source region in central Asia. In the tropics the change in forcing is estimated to be overall negative, and of similarly large magnitude (--2.2 to --3.2 W m ) to the radiative cooling e#ect of low atmospheric (CO 2 ). Thus, the largest long-term climatic e#ect of the LGM dust is likely to have been a cooling of the tropics. Low tropical sea-surface temperatures, low atmospheric (CO 2 ) and high atmospheric dust loading may be mutually reinforcin...

T. Claquin; C. Roelandt; K.E. Kohfeld; S.P. Harrison; I. Tegen; I.C. Prentice; Y. Balkanski; Prentice Æ Y. Balkanski; G. Bergametti; Æ N. Mahowald; Æ M. Schulz; M. Schulz; Æ K. E. Kohfeld; Æ K. E. Kohfeld; C. Roelandt; C. Roelandt; Æ S. P. Harrison; Æ S. P. Harrison; Æ S. P. Harrison; G. Bergametti; H. Rodhe; Æ H. Rodhe; M. Hansson; M. Hansson; N. Mahowald; N. Mahowald

2003-01-01T23:59:59.000Z

258

First Results from IceCube  

E-Print Network (OSTI)

IceCube is a 1 km$^3$ neutrino observatory being built to study neutrino production in active galactic nuclei, gamma-ray bursts, supernova remnants, and a host of other astrophysical sources. High-energy neutrinos may signal the sources of ultra-high energy cosmic rays. IceCube will also study many particle-physics topics: searches for WIMP annihilation in the Earth or the Sun, and for signatures of supersymmetry in neutrino interactions, studies of neutrino properties, including searches for extra dimensions, and searches for exotica such as magnetic monopoles or Q-balls. IceCube will also study the cosmic-ray composition. In January, 2005, 60 digital optical modules (DOMs) were deployed in the South Polar ice at depths ranging from 1450 to 2450 meters, and 8 ice-tanks, each containing 2 DOMs were deployed as part of a surface air-shower array. All 76 DOMs are collecting high-quality data. After discussing the IceCube physics program and hardware, I will present some initial results with the first DOMs.

Spencer R. Klein; for the IceCube Collaboration

2006-01-12T23:59:59.000Z

259

Force criterion prediction of damage for carbon/epoxy composite panels impacted by high velocity ice  

E-Print Network (OSTI)

H, Kedward, K. T. Modeling Hail Ice Impacts and PredictingInvestigation of High Velocity Ice Impacts on Woven Carbon/Analysis Correlation of Hail Ice Impacting Composite

Rhymer, Jennifer D.

2012-01-01T23:59:59.000Z

260

Melting Ice and Tangled Nets: Litigation and Conservation Policy in the US, Australia, and Canada  

E-Print Network (OSTI)

Melting Ice and Tangled Nets: Litigation and Conservationare heavily dependent on sea ice for their survival, both asvulnerable to the receding sea ice boundaries predicted to

Shaffer, Robert

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Ice-Tethered Profiler Measurements of Dissolved Oxygen under Permanent Ice Cover in the Arctic Ocean  

Science Conference Proceedings (OSTI)

Four ice-tethered profilers (ITPs), deployed between 2006 and 2009, have provided year-round dissolved oxygen (DO) measurements from the surface mixed layer to 760-m depth under the permanent sea ice cover in the Arctic Ocean. These ITPs drifted ...

M.-L. Timmermans; R. Krishfield; S. Laney; J. Toole

2010-11-01T23:59:59.000Z

262

Comparative ICE genomics: insights into the evolution of the SXT/R391 family of ICEs  

E-Print Network (OSTI)

Integrating and conjugative elements (ICEs) are one of the three principal types of self-transmissible mobile genetic elements in bacteria. ICEs, like plasmids, transfer via conjugation; but unlike plasmids and similar to many phages, these elements integrate into and replicate along with the host chromosome. Members of the SXT/R391 family of ICEs have been isolated from several species of gram-negative bacteria, including Vibrio cholerae, the cause of cholera, where they have been important vectors for disseminating genes conferring resistance to antibiotics. Here we developed a plasmid-based system to capture and isolate SXT/R391 ICEs for sequencing. Comparative analyses of the genomes of 13 SXT/R391 ICEs derived from diverse hosts and locations revealed that they contain 52 perfectly syntenic and nearly identical core genes that serve as a scaffold capable of mobilizing an array of variable DNA. Furthermore, selection pressure to maintain ICE mobility appears to have restricted insertions of variable DNA into intergenic sites that do not interrupt core functions. The variable genes confer diverse element-specific phenotypes, such as resistance to antibiotics. Functional analysis of a set of deletion mutants revealed that less than half of the conserved core genes are required for ICE mobility; the functions of most of the dispensable core genes are unknown. Several lines of evidence suggest that there has been extensive recombination between SXT/R391 ICEs, resulting in re-assortment of their respective variable gene content. Furthermore,

Rachel A. F. Wozniak; Derrick E. Fouts; Matteo Spagnoletti; Mauro M. Colombo

2009-01-01T23:59:59.000Z

263

The Icing of an Unheated, Nonrotating Cylinder. Part II. Icing Wind Tunnel Experiments  

Science Conference Proceedings (OSTI)

An experimental investigation of icing on non-rotating cylinders, under both wet and dry conditions was undertaken. Airspeeds of 30, 61 and 122 m s?1 appropriate to aircraft icing, liquid water contents of 0.4, 0.8 and 1.2 g m?3 and temperatures ...

E. P. Lozowski; J. R. Stallabrass; P. F. Hearty

1983-12-01T23:59:59.000Z

264

Simulations of Snow, Ice, and Near-Surface Atmospheric Processes on Ice Station Weddell  

Science Conference Proceedings (OSTI)

The 4-month drift of Ice Station Weddell (ISW) produced over 2000 h of nearly continuous measurements in the atmospheric surface layer and in the snow and sea ice in the western Weddell Sea. This paper reports simulations, based on these data, of ...

Edgar L. Andreas; Rachel E. Jordan; Aleksandr P. Makshtas

2004-08-01T23:59:59.000Z

265

Arctic Sea Ice Retreat in 2007 Follows Thinning Trend  

E-Print Network (OSTI)

The minimum of Arctic sea ice extent in the summer of 2007 was unprecedented in the historical record. A coupled ice–ocean model is used to determine the state of the ice and ocean over the past 29 yr to investigate the causes of this ice extent minimum within a historical perspective. It is found that even though the 2007 ice extent was strongly anomalous, the loss in total ice mass was not. Rather, the 2007 ice mass loss is largely consistent with a steady decrease in ice thickness that began in 1987. Since then, the simulated mean September ice thickness within the Arctic Ocean has declined from 3.7 to 2.6 m at a rate of ?0.57 m decade ?1. Both the area coverage of thin ice at the beginning of the melt season and the total volume of ice lost in the summer have been steadily increasing. The combined impact of these two trends caused a large reduction in the September mean ice concentration in the Arctic Ocean. This created conditions during the summer of 2007 that allowed persistent winds to push the remaining ice from the Pacific side to the Atlantic side of the basin and more than usual into the Greenland Sea. This exposed large areas of open water, resulting in the record ice extent anomaly. 1.

R. W. Lindsay; J. Zhang; A. Schweiger; M. Steele; H. Stern

2008-01-01T23:59:59.000Z

266

Modeling of Antarctic sea ice in a general circulation model  

SciTech Connect

A dynamic-thermodynamic sea ice model is developed and coupled with the Melbourne University general circulation model to simulate the seasonal cycle of the Antarctic sea ice distributions The model is efficient, rapid to compute, and useful for a range of climate studies. The thermodynamic part of the sea ice model is similar to that developed by Parkinson and Washington, the dynamics contain a simplified ice rheology that resists compression. The thermodynamics is based on energy conservation at the top surface of the ice/snow, the ice/water interface, and the open water area to determine the ice formation, accretion, and ablation. A lead parameterization is introduced with an effective partitioning scheme for freezing between and under the ice floes. The dynamic calculation determines the motion of ice, which is forced with the atmospheric wind, taking account of ice resistance and rafting. The simulated sea ice distribution compares reasonably well with observations. The seasonal cycle of ice extent is well simulated in phase as well as in magnitude. Simulated sea ice thickness and concentration are also in good agreement with observations over most regions and serve to indicate the importance of advection and ocean drift in the determination of the sea ice distribution. 64 refs., 15 figs., 2 tabs.

Wu, Xingren; Budd, W.F. [Antarctic Cooperative Research Centre, Tasmania (Australia)] [Antarctic Cooperative Research Centre, Tasmania (Australia); Simmonds, I. [School of Earth Sciences, Victoria (Australia)] [School of Earth Sciences, Victoria (Australia)

1997-04-01T23:59:59.000Z

267

Effects of ice particle size vertical inhomogeneity on the passive remote sensing of ice clouds  

Science Conference Proceedings (OSTI)

The solar reflectance bi-spectral (SRBS) and infrared split-window (IRSpW) methods are two of the most popular techniques for passive ice cloud property retrievals from multispectral imagers. Ice clouds are usually assumed to be vertically homogeneous in global operational algorithms based on these methods, although significant vertical variations of ice particle size are typically observed in ice clouds. In this study we investigate uncertainties in retrieved optical thickness, effective particle size, and ice water path introduced by a homogeneous cloud assumption in both the SRBS and IRSpW methods, and focus on whether the assumption can lead to significant discrepancies between the two methods. The study simulates the upwelling spectral radiance associated with vertically structured clouds and passes the results through representative SRBS and IRSpW retrieval algorithms. Cloud optical thickness is limited to values for which IRSpW retrievals are possible (optical thickness less than about 7). When the ice cloud is optically thin and yet has a significant ice particle size vertical variation, it is found that both methods tend to underestimate the effective radius and ice water path. The reason for the underestimation is the nonlinear dependence of ice particle scattering properties (extinction and single scattering albedo) on the effective radius. Because the nonlinearity effect is stronger in the IRSpW than the SRBS method, the IRSpW-based IWP tends to be smaller than the SRBS counterpart. When the ice cloud is moderately optically thick and ice particle size increases monotonically towards cloud base, the two methods are in qualitative agreement; in the event that ice particle size decreases towards cloud base, the effective radius and ice water path retrievals based on the SRBS method are substantially larger than those from the IRSpW. The main findings of this study suggest that the homogenous cloud assumption can affect the SRBS and IRSpW methods to different extents and, consequently, can lead to significantly different retrievals. Therefore caution should be taken when comparing and combining the ice cloud property retrievals from these two methods.

Zhang, Zhibo; Platnick, Steven; Yang, Ping; Heidinger, Andrew K.; Comstock, Jennifer M.

2010-09-03T23:59:59.000Z

268

Sea Ice Brightness Temperature as a Function of Ice Thickness, Part II: Computed curves for thermodynamically modelled ice profiles  

E-Print Network (OSTI)

Ice thickness is an important variable for climate scientists and is still an unsolved problem for satellite remote sensing specialists. There has been some success detecting the thickness of thin ice from microwave radiometers, and with this in mind this study attempts to model the thickness-radiance relation of sea ice at frequencies employed by the Soil Moisture and Ocean Salinity (SMOS) radiometer and the Advanced Microwave Scanning Radiometer (AMSR): between 1.4 and 89 GHz. In the first part of the study, the salinity of the ice was determined by a pair of empirical relationships, while the temperature was determined by a thermodynamic model. Because the thermodynamic model can be used as a simple ice growth model, in this, second part, the salinities are determined by the growth model. Because the model uses two, constant-weather scenarios representing two extremes ("fall freeze-up" and "winter cold snap"), brine expulsion is modelled with a single correction-step founded on mass conservation. The growt...

Mills, Peter

2012-01-01T23:59:59.000Z

269

CYANATE ION IN COMPACT AMORPHOUS WATER ICE  

SciTech Connect

The 4.62 {mu}m infrared (2164.5 cm{sup -1}) absorption band, observed in ice mantels toward many young stellar objects, has been mostly attributed to the {nu}{sub 3} (CN stretch) band of OCN{sup -} ions. We present in this work a spectroscopic study of OCN{sup -} ions embedded in compact amorphous ice in a range of concentrations and temperatures relevant to astronomical observations together with quantum mechanical calculations of the {nu}{sub 3} band of OCN{sup -} in various H{sub 2}O environments. The ice samples containing the ions are prepared through hyperquenching of liquid droplets of K{sup +}OCN{sup -} solutions on a substrate at 14 K. The {nu}{sub 3} OCN{sup -} band appears as a broad feature peaking at 4.64 {mu}m with a secondary maximum at 4.54 {mu}m and is much weaker than the corresponding peak in the liquid solution or in the solid salt. A similar weakening is observed for other OCN{sup -} absorption peaks at 7.66 {mu}m (2{nu}{sub 2}) and 8.20 {mu}m ({nu}{sub 1}). The theoretical calculations for the {nu}{sub 3} vibration lead to a range of frequencies spanning the experimentally observed width. This frequency spread could help explain the pronounced drop in the band intensity in the ice. The OCN{sup -} {nu}{sub 3} band in the present compact ices is also broader and much weaker than that reported in the literature for OCN{sup -} ions obtained by variously processing porous ice samples containing suitable neutral precursors. The results of this study indicate that the astronomical detection of OCN{sup -} in ice mantels could be significantly impaired if the ion is embedded in a compact water network.

Mate, Belen; Herrero, Victor J.; Rodriguez-Lazcano, Yamilet; Moreno, Miguel A.; Escribano, Rafael [Instituto de Estructura de la Materia, IEM-CSIC, Serrano 121, E-28006 Madrid (Spain); Fernandez-Torre, Delia [Departamento de Fisica Teorica de la Materia Condensada, Universidad Autonoma de Madrid, E-28050 Madrid (Spain); Gomez, Pedro C. [Departamento de Quimica Fisica I, Universidad Complutense, Unidad Asociada UCM-CSIC, E-28040 Madrid (Spain)

2012-11-10T23:59:59.000Z

270

WATER ICE IN THE KUIPER BELT  

Science Conference Proceedings (OSTI)

We examine a large collection of low-resolution near-infrared spectra of Kuiper Belt objects (KBOs) and centaurs in an attempt to understand the presence of water ice in the Kuiper Belt. We find that water ice on the surface of these objects occurs in three separate manners: (1) Haumea family members uniquely show surfaces of nearly pure water ice, presumably a consequence of the fragmentation of the icy mantle of a larger differentiated proto-Haumea; (2) large objects with absolute magnitudes of H ice-perhaps mixed with ammonia-that appears to be related to possibly ancient cryovolcanism on these large objects; and (3) smaller KBOs and centaurs which are neither Haumea family members nor cold-classical KBOs appear to divide into two families (which we refer to as 'neutral' and 'red'), each of which is a mixture of a common nearly neutral component and either a slightly red or very red component that also includes water ice. A model suggesting that the difference between neutral and red objects due to formation in an early compact solar system either inside or outside, respectively, of the {approx}20 AU methanol evaporation line is supported by the observation that methanol is only detected on the reddest objects, which are those which would be expected to have the most of the methanol containing mixture.

Brown, M. E.; Fraser, W. C. [Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125 (United States); Schaller, E. L., E-mail: mbrown@caltech.edu [NASA Dryden Aircraft Operations Facility, Palmdale, CA 93550 (United States)

2012-06-15T23:59:59.000Z

271

SURVIVAL OF AMORPHOUS WATER ICE ON CENTAURS  

Science Conference Proceedings (OSTI)

Centaurs are believed to be Kuiper Belt objects in transition between Jupiter and Neptune before possibly becoming Jupiter family comets. Some indirect observational evidence is consistent with the presence of amorphous water ice in Centaurs. Some of them also display a cometary activity, probably triggered by the crystallization of the amorphous water ice, as suggested by Jewitt and this work. Indeed, we investigate the survival of amorphous water ice against crystallization, using a fully three-dimensional thermal evolution model. Simulations are performed for varying heliocentric distances and obliquities. They suggest that crystallization can be triggered as far as 16 AU, though amorphous ice can survive beyond 10 AU. The phase transition is an efficient source of outgassing up to 10-12 AU, which is broadly consistent with the observations of the active Centaurs. The most extreme case is 167P/CINEOS, which barely crystallizes in our simulations. However, amorphous ice can be preserved inside Centaurs in many heliocentric distance-obliquity combinations, below a {approx}5-10 m crystallized crust. We also find that outgassing due to crystallization cannot be sustained for a time longer than 10{sup 4}-10{sup 4} years, leading to the hypothesis that active Centaurs might have recently suffered from orbital changes. This could be supported by both observations (although limited) and dynamical studies.

Guilbert-Lepoutre, Aurelie, E-mail: aguilbert@ucla.edu [Department of Earth and Space Sciences, UCLA, Los Angeles, CA 90095 (United States)

2012-10-01T23:59:59.000Z

272

Nonlinear threshold behavior during the loss of Arctic sea ice  

E-Print Network (OSTI)

In light of the rapid recent retreat of Arctic sea ice, a number of studies have discussed the possibility of a critical threshold (or "tipping point") beyond which the ice-albedo feedback causes the ice cover to melt away in an irreversible process. The focus has typically been centered on the annual minimum (September) ice cover, which is often seen as particularly susceptible to destabilization by the ice-albedo feedback. Here we examine the central physical processes associated with the transition from ice-covered to ice-free Arctic Ocean conditions. We show that while the ice-albedo feedback promotes the existence of multiple ice cover states, the stabilizing thermodynamic effects of sea ice mitigate this when the Arctic Ocean is ice-covered during a sufficiently large fraction of the year. These results suggest that critical threshold behavior is unlikely during the approach from current perennial sea ice conditions to seasonally ice-free conditions. In a further warmed climate, however, we find that a ...

Eisenman, I; 10.1073/pnas.0806887106

2008-01-01T23:59:59.000Z

273

Surface Wave Propagation in Shallow Water beneath an Inhomogeneous Ice Cover  

Science Conference Proceedings (OSTI)

The scattering of flexural–gravity waves in a layer of shallow fluid beneath an ice cover with irregularities is investigated. The irregularities considered are the ice edges, cracks, areas of finely broken ice, and ice ridges. Even this ...

A. V. Marchenko; K. I. Voliak

1997-08-01T23:59:59.000Z

274

Web-Ice: Integrated Data Collection and Analysis for Macromolecular Crystallography  

E-Print Network (OSTI)

in Blu-Ice. Figure 7: SSRL Web-Ice interface displaying theTable 1: Programs used by Web-Ice for data analysis. ProgramWeb-Ice: Integrated Data Collection and Analysis for

Gonzalez, Ana

2008-01-01T23:59:59.000Z

275

Quantification of the effects of shattering on airborne ice particle measurements  

Science Conference Proceedings (OSTI)

Ice particle shattering poses a serious problem to airborne characterization microstructure of ice clouds. Shattered ice fragments may contaminate particle measurements resulting in artificially high concentrations of small ice. The ubiquitous ...

A. V. Korolev; E. F. Emery; J. W. Strapp; S. G. Cober; G. A. Isaac

276

Quantification of the Effects of Shattering on Airborne Ice Particle Measurements  

Science Conference Proceedings (OSTI)

Ice particle shattering poses a serious problem to the airborne characterization of ice cloud microstructure. Shattered ice fragments may contaminate particle measurements, resulting in artificially high concentrations of small ice. The ubiquitous ...

A. V. Korolev; E. F. Emery; J. W. Strapp; S. G. Cober; G. A. Isaac

2013-11-01T23:59:59.000Z

277

A New Apparatus for Monitoring Sea Ice Thickness Based on the Magnetostrictive-Delay-Line Principle  

Science Conference Proceedings (OSTI)

High-precision ice thickness observations are required to gain a better understanding of ocean–ice–atmosphere interactions and to validate numerical sea ice models. A new apparatus for monitoring sea ice and snow thickness has been developed, ...

Ruibo Lei; Zhijun Li; Yanfeng Cheng; Xin Wang; Yao Chen

2009-04-01T23:59:59.000Z

278

Intertemporal Computable Equilibrium System (ICES) | Open Energy  

Open Energy Info (EERE)

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

279

Ice Towing Tank | Open Energy Information  

Open Energy Info (EERE)

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

280

Application of Ice Nucleation Kinetics in Orographic Clouds  

Science Conference Proceedings (OSTI)

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

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

1987-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Atmospheric Ice Crystals over the Antarctic Plateau in Winter  

Science Conference Proceedings (OSTI)

Falling ice crystals were collected daily on a gridded glass slide at South Pole Station, Antarctica, during the Antarctic winter of 1992 and were photographed through a microscope. Nine types of ice crystals are identified, which fall into three ...

Von P. Walden; Stephen G. Warren; Elizabeth Tuttle

2003-10-01T23:59:59.000Z

282

The mystery of ice crystal multiplication in a laboratory experiment  

Science Conference Proceedings (OSTI)

The paper addresses the problem of the large discrepancies between ice crystal concentrations in clouds and the number of ice nuclei in nearby clear air reported in published papers. Such discrepancies cannot always be explained, even by taking ...

Gianni Santachiara; Franco Belosi; Franco Prodi

283

Production of Ice in Tropospheric Clouds: A Review  

Science Conference Proceedings (OSTI)

Ice in the troposphere affects a variety of processes, including the formation of precipitation, and cloud lifetime, albedo, dynamics, and electrification. A lack of understanding of the ways in which ice is created and multiplied hampers ...

Will Cantrell; Andrew Heymsfield

2005-06-01T23:59:59.000Z

284

Production of Ice Particles in Clouds Due to Aircraft Penetrations  

Science Conference Proceedings (OSTI)

Evidence is presented that the passage of an aircraft through supercooled clouds can produce high concentrations of ice particles (> 1000 L?1 at ?8°C in one case). These Aircraft Produced Ice Particles (APIPs) are characterized, initially, both ...

Arthur L. Rangno; Peter V. Hobbs

1983-02-01T23:59:59.000Z

285

Simulated Atmospheric Rime Icing of Some Wind Speed Sensors  

Science Conference Proceedings (OSTI)

Four commercially available wind speed sensors have been tested in an icing wind tunnel to determine the relative susceptibility of each to atmospheric icing and to determine the influence of ire accumulations upon the operation and accuracy of ...

E. M. Gates; W. C. Thompson

1986-06-01T23:59:59.000Z

286

Estimating Intensity of Atmospheric Ice Accretion on Stationary Structures  

Science Conference Proceedings (OSTI)

The role of various atmospheric parameters in determining atmospheric ice accretion intensity on structures near the ground is examined theoretically, with an emphasis on glaze formation. Methods are presented for calculating the icing rate on ...

Lasse Makkonen

1981-05-01T23:59:59.000Z

287

Laboratory Measurements of Light Scattering by Single Levitated Ice Crystals  

Science Conference Proceedings (OSTI)

The authors have measured the differential light-scattering cross sections and phase functions of single vapor-grown hexagonal ice particles levitated in an electrodynamic balance. The ice particles, grown at temperatures ?5° > T > ?10°C, were ...

Neil J. Bacon; Brian D. Swanson

2000-07-01T23:59:59.000Z

288

Isothermal Ice Crystallization Kinetics in the Gas-Diffusion...  

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

Isothermal Ice Crystallization Kinetics in the Gas-Diffusion Layer of a Proton-Exchange-Membrane Fuel Cell Title Isothermal Ice Crystallization Kinetics in the Gas-Diffusion Layer...

289

Modeling the Effect of Ice Nuclei on ARM Clouds  

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

Upper-Tropospheric Ice Water Content in TWP-ICE Xiping Zeng, Wei-Kuo Tao, Minghua Zhang, and Shaochen Xie March 31, 2009 Papers Published Recently * Zeng, X., W.-K. Tao, M. Zhang,...

290

SEAS Recognition Ceremony -May 10, 2009 Goggin Ice Arena  

E-Print Network (OSTI)

Page 1 SEAS Recognition Ceremony - May 10, 2009 Goggin Ice Arena Main Arena - Ceremony Location Oak Card Distribution, Student & Faculty Processional Line Up. Students: Upon arriving at Goggin Ice Arena

Dollar, Anna

291

Impacts of Ice Clouds on GPS Radio Occultation Measurements  

Science Conference Proceedings (OSTI)

Mathematical solutions accounting for the effects of liquid and ice clouds on the propagation of the GPS radio signals are first derived. The percentage contribution of ice water content (IWC) to the total refractivity increases linearly with the ...

X. Zou; S. Yang; P. S. Ray

2012-12-01T23:59:59.000Z

292

Scattering Phase Function of Bullet Rosette Ice Crystals  

Science Conference Proceedings (OSTI)

Ice crystals in cirrus frequently exhibit the shape of a bullet rosette composed of multiple bullets that radiate from a junction center. The scattering phase function of these ice crystals, pertinent to the radiation budget of cirrus, may differ ...

Jean Iaquinta; Harumi Isaka; Pascal Personne

1995-05-01T23:59:59.000Z

293

Current Icing Potential: Algorithm Description and Comparison with Aircraft Observations  

Science Conference Proceedings (OSTI)

The “current icing potential” (CIP) algorithm combines satellite, radar, surface, lightning, and pilot-report observations with model output to create a detailed three-dimensional hourly diagnosis of the potential for the existence of icing and ...

Ben C. Bernstein; Frank McDonough; Marcia K. Politovich; Barbara G. Brown; Thomas P. Ratvasky; Dean R. Miller; Cory A. Wolff; Gary Cunning

2005-07-01T23:59:59.000Z

294

Aircraft Icing Measurements in East Coast Winter Storms  

Science Conference Proceedings (OSTI)

Analysis of the aircraft icing environments of East Coast winter storms have been made from 3 1 flights duringthe second Canadian Atlantic Storms Program. Microphysical parameters have been summarized and are compared to common icing intensity ...

Stewart G. Cober; George A. Isaac; J. W. Strapp

1995-01-01T23:59:59.000Z

295

Prediction of Vessel Icing for Near-Freezing Sea Temperatures  

Science Conference Proceedings (OSTI)

The operational NOAA categorical vessel icing algorithm is evaluated with regard to advances in understanding of the icing process and forecasting experience. When sea temperatures are <2–3°C above the saltwater freezing point there is the ...

James E. Overland

1990-03-01T23:59:59.000Z

296

Changes in Ice Storm Impacts over Time: 1886–2000  

Science Conference Proceedings (OSTI)

Ice storms have a variety of negative effects on society. Through an analysis of newspaper accounts of nine exceptional ice storms, the most widespread and longest lasting impact is the loss of electrical power. Power outages also cause secondary ...

David A. Call

2010-01-01T23:59:59.000Z

297

Improving 30-Day Great Lakes Ice Cover Outlooks  

Science Conference Proceedings (OSTI)

Prediction of Great Lakes ice cover is important for winter operations and planning activities. Current 30-day forecasts use accumulated freezing degree-days (AFDDs) to identify similar historical events and associated ice cover. The authors ...

Raymond Assel; Sheldon Drobot; Thomas E. Croley II

2004-08-01T23:59:59.000Z

298

Retrieval of Ice Cloud Parameters Using a Microwave Imaging Radiometer  

Science Conference Proceedings (OSTI)

Based on the radiative transfer theory, the microwave radiance emanating from ice clouds at arbitrary viewing angles is expressed as an analytic function of the cloud ice water path (IWP), the particle effective diameter (De), and the particle ...

Fuzhong Weng; Norman C. Grody

2000-04-01T23:59:59.000Z

299

Evolutionary Optimization of an Ice Accretion Forecasting System  

Science Conference Proceedings (OSTI)

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

Pawel Pytlak; Petr Musilek; Edward Lozowski; Dan Arnold

2010-07-01T23:59:59.000Z

300

Water-Cooled Ice Machines, Purchasing Specifications for Energy...  

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

Ice Makers. b) Measured in accordance with ARI Standard 810-2003. Does not include condenser water use. Buying Energy-Efficient Water-Cooled Ice Machines Several types of...

Note: This page contains sample records for the topic "ice rink field" 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

A New Horizontal Gradient, Continuous Flow, Ice Thermal Diffusion Chamber  

Science Conference Proceedings (OSTI)

A continuous-flow, horizontal gradient, ice thermal diffusion chamber has been developed and tested for heterogeneous ice nucleation of aerosol particles under accurately controlled supersaturations and supercooling in the absence of a substrate. ...

E. M. Tomlinson; N. Fukuta

1985-12-01T23:59:59.000Z

302

The Sublimation of Dry Ice Pellets Used for Cloud Seeding  

Science Conference Proceedings (OSTI)

A numerical model has been developed to investigate the sublimation rate of cylindrical dry ice pellets in clear and cloudy air. Experiments conducted in the University of Alberta FROST icing-wind tunnel were used to make comparisons with the ...

B. Kochtubajda; E. P. Lozowski

1985-06-01T23:59:59.000Z

303

Cloud Ice Crystal Classification Using a 95-GHz Polarimetric Radar  

Science Conference Proceedings (OSTI)

Two algorithms are presented for ice crystal classification using 95-GHz polarimetric radar observables and air temperature (T). Both are based on a fuzzy logic scheme. Ice crystals are classified as columnar crystals (CC), planar crystals (PC), ...

K. Aydin; J. Singh

2004-11-01T23:59:59.000Z

304

Antarctic Sea Ice Extent Variability and Its Global Connectivity  

Science Conference Proceedings (OSTI)

This study statistically evaluates the relationship between Antarctic sea ice extent and global climate variability. Temporal cross correlations between detrended Antarctic sea ice edge (SIE) anomaly and various climate indices are calculated. ...

Xiaojun Yuan; Douglas G. Martinson

2000-05-01T23:59:59.000Z

305

Observations of Thermohaline Convection adjacent to Brunt Ice Shelf  

Science Conference Proceedings (OSTI)

Observations were made of ocean microstructure and horizontal currents adjacent to Brunt Ice Shelf in the southeastern Weddell Sea. Periods of in situ supercooled water extending as deep as 65 m were associated with ice nucleation and frazil ...

Ilker Fer; Keith Makinson; Keith W. Nicholls

2012-03-01T23:59:59.000Z

306

Aircraft Observations of Ice Crystal Evolution in an Altostratus Cloud  

Science Conference Proceedings (OSTI)

Observations from a Lagrangian spiral descent within altostratus cloud associated with a cold front were used to study the evolution of ice particle spectra by following populations of ice crystals as they fell through the cloud. The flight track ...

Paul R. Field

1999-06-01T23:59:59.000Z

307

Late Pleistocene Ice Age Scenarios Based on Observational Evidence  

Science Conference Proceedings (OSTI)

Ice age scenarios for the last glacial-interglacial cycle, based on observations of Boyle and Keigwin concerning the North Atlantic thermohaline circulation and of Barnola et al. concerning atmospheric C02 variations derived from the Vostok ice ...

G. DeBlonde; W. R. Peltier

1993-04-01T23:59:59.000Z

308

Wave-induced Roll Motion beneath an Ice Cover  

Science Conference Proceedings (OSTI)

A pair of gravity waves propagating at oblique angles along the sea-ice interface in a viscous, rotating ocean is studied theoretically. The motion is described by a Lagrangian formulation. Two theoretical models of the ice cover are considered. ...

Arne Melsom

1992-01-01T23:59:59.000Z

309

Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

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

310

Ice Ball Impact Testing of Roofing Materials - Programmaster.org  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2010. Symposium, Failure Analysis and Prevention. Presentation Title, Ice Ball Impact Testing of ...

311

Using Ice to Make Nature Inspired Hybrid Materials - Programmaster ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2011. Symposium, Surface Properties of Biomaterials. Presentation Title, Using Ice to Make Nature ...

312

Current Research on Medical Slurry Cooling: Medical Ice Slurry...  

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

Applications Homeland Security Applications Biomedical Applications Medical Ice Slurry Coolants for Inducing Targeted-OrganTissue Protective Cooling Technology...

313

Technology Description: Medical Ice Slurry Coolants for Inducing...  

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

Applications Homeland Security Applications Biomedical Applications Medical Ice Slurry Coolants for Inducing Targeted-OrganTissue Protective Cooling Technology...

314

An update on land-ice modeling in the CESM  

Science Conference Proceedings (OSTI)

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

Lipscomb, William H [Los Alamos National Laboratory

2011-01-18T23:59:59.000Z

315

FINAL REPORT FOR THE DOE/ARM PROJECT TITLED Representation of the Microphysical and Radiative Properties of Ice Clouds in SCMs and GCMs  

SciTech Connect

The broad goal of this research is to improve climate prediction through better representation of cirrus cloud microphysical and radiative properties in global climate models (GCMs). Clouds still represent the greatest source of uncertainty in climate prediction, and the representation of ice clouds is considerably more challenging than liquid water clouds. While about 40% of cloud condensate may be in the form of ice by some estimates, there have been no credible means of representing the ice particle size distribution and mass removal rates from ice clouds in GCMs. Both factors introduce large uncertainties regarding the global net flux, the latter factor alone producing a change of 10 W/m2 in the global net flux due to plausible changes in effective ice particle fallspeed. In addition, the radiative properties of ice crystals themselves are in question. This research provides GCMs with a credible means of representing the full (bimodal) ice particle size distribution (PSD) in ice clouds, including estimates of the small crystal (D < 65 microns) mode of the PSD. It also provides realistic estimates of mass sedimentation rates from ice clouds, which have a strong impact on their ice contents and radiative properties. This can be done through proper analysis of ice cloud microphysical data from ARM and other field campaigns. In addition, this research tests the ice cloud radiation treatment developed under two previous ARM projects by comparing it against laboratory measurements of ice cloud extinction efficiency and by comparing it with explicit theoretical calculations of ice crystal optical properties. The outcome of this project includes two PSD schemes for ice clouds; one appropriate for mid-latitude cirrus clouds and another for tropical anvil cirrus. Cloud temperature and ice water content (IWC) are the inputs for these PSD schemes, which are based on numerous PSD observations. The temperature dependence of the small crystal mode of the PSD for tropical anvils is opposite to that of mid-latitude cirrus, and this results in very different radiative properties for these two types of cirrus at temperatures less than about 50 C for a given ice water path. In addition, the representative PSD fall velocity is strongly influenced by the small crystal mode, and for temperatures less than 52 C, this fall velocity for mid-latitude cirrus is 2-8 times greater than for tropical anvil cirrus. Finally, the treatment of ice cloud optical properties was found to agree with laboratory measurements and exact theory within 15% for any given wavelength, PSD and ice particle shape. This treatment is analytical, formulated in terms of the PSD and ice particle shape properties. It thus provides the means for explicitly coupling the ice cloud microphysical and radiative properties, and can treat any combination of ice particle shape. It is very inexpensive regarding computer time. When these three deliverables were incorporated into the GCM at the National Center for Atmospheric Research (NCAR) under another project, it was found that the sunlight reflected and the amount of upwelling heat absorbed by cirrus clouds depended strongly on the PSD scheme used (i.e. mid-latitude or tropical anvil). This was largely due to the fall velocities associated with the two PSD schemes, although the PSD shape was also important.

Mitchell, David L.

2005-08-08T23:59:59.000Z

316

Greenland Ice Sheet Mass Balance Reconstruction. Part III: Marine Ice Loss and Total Mass Balance (1840–2010)  

Science Conference Proceedings (OSTI)

Greenland ice sheet mass loss to the marine environment occurs by some combination of iceberg calving and underwater melting (referred to here as marine ice loss, LM). This study quantifies the relation between LM and meltwater runoff (R) at the ...

Jason E. Box; William Colgan

2013-09-01T23:59:59.000Z

317

Estimation of Thin Ice Thickness and Detection of Fast Ice from SSM/I Data in the Antarctic Ocean  

Science Conference Proceedings (OSTI)

Antarctic coastal polynyas are important areas of high sea ice production and dense water formation, and thus their detection including an estimate of thin ice thickness is essential. In this paper, the authors propose an algorithm that estimates ...

Takeshi Tamura; Kay I. Ohshima; Thorsten Markus; Donald J. Cavalieri; Sohey Nihashi; Naohiko Hirasawa

2007-10-01T23:59:59.000Z

318

Greenland ice sheet mass balance reconstruction. Part III: marine ice loss and total mass balance (1840-2010)  

Science Conference Proceedings (OSTI)

Greenland ice sheet mass loss to the marine environment occurs by some combination of iceberg calving and underwater melting (referred to here as marine ice loss, LM). This study quantifies the relation between LM and meltwater runoff (R) at the ...

Jason E. Box; William Colgan

319

Modeling the fracture of ice sheets on parallel computers.  

SciTech Connect

The objective of this project is to investigate the complex fracture of ice and understand its role within larger ice sheet simulations and global climate change. At the present time, ice fracture is not explicitly considered within ice sheet models due in part to large computational costs associated with the accurate modeling of this complex phenomena. However, fracture not only plays an extremely important role in regional behavior but also influences ice dynamics over much larger zones in ways that are currently not well understood. Dramatic illustrations of fracture-induced phenomena most notably include the recent collapse of ice shelves in Antarctica (e.g. partial collapse of the Wilkins shelf in March of 2008 and the diminishing extent of the Larsen B shelf from 1998 to 2002). Other fracture examples include ice calving (fracture of icebergs) which is presently approximated in simplistic ways within ice sheet models, and the draining of supraglacial lakes through a complex network of cracks, a so called ice sheet plumbing system, that is believed to cause accelerated ice sheet flows due essentially to lubrication of the contact surface with the ground. These dramatic changes are emblematic of the ongoing change in the Earth's polar regions and highlight the important role of fracturing ice. To model ice fracture, a simulation capability will be designed centered around extended finite elements and solved by specialized multigrid methods on parallel computers. In addition, appropriate dynamic load balancing techniques will be employed to ensure an approximate equal amount of work for each processor.

Waisman, Haim (Columbia University); Bell, Robin (Columbia University); Keyes, David (Columbia University); Boman, Erik Gunnar; Tuminaro, Raymond Stephen

2010-03-01T23:59:59.000Z

320

Interannual variability of arctic landfast ice between 1976 and 2007  

Science Conference Proceedings (OSTI)

Analysis of weekly sea ice charts produced by the U.S. National Ice Center from 1976 to 2007 indicates large interannual variations in the averaged winter landfast ice extent around the Arctic Basin. During the 32-year period of the record, ...

Yanling Yu; Harry Stern; Charles Fowler; Florence Fetterer; James Maslanik

Note: This page contains sample records for the topic "ice rink field" 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

Is the Missing Ultra-Red Material Colorless Ice?  

E-Print Network (OSTI)

The extremely red colors of some transneptunian objects and Centaurs are not seen among the Jupiter family comets which supposedly derive from them. Could this mismatch result from sublimation loss of colorless ice? Radiative transfer models show that mixtures of volatile ice and nonvolatile organics could be extremely red, but become progressively darker and less red as the ice sublimates away.

Grundy, W M

2008-01-01T23:59:59.000Z

322

Is the Missing Ultra-Red Material Colorless Ice?  

E-Print Network (OSTI)

The extremely red colors of some transneptunian objects and Centaurs are not seen among the Jupiter family comets which supposedly derive from them. Could this mismatch result from sublimation loss of colorless ice? Radiative transfer models show that mixtures of volatile ice and nonvolatile organics could be extremely red, but become progressively darker and less red as the ice sublimates away.

W. M. Grundy

2008-11-14T23:59:59.000Z

323

District cooling: Phase 2, Direct freeze ice slurry system testing  

DOE Green Energy (OSTI)

The objectives of this research are to: extend the range of pressure drop data for ice-water slurry flows; and design and build a prototypical ice slurry distribution system which demonstrates ice slurry handling at an end user's heat exchanger, without sending ice slurry directly through the heat exchanger. Previous research (Phase 1) conducted by CBI under DOE Contract FG01-86CE26564 has shown a friction reducing effect of ice crystals in water flow. The results of this work demonstrated a 40% reduction in pump power required to move an ice-water slurry versus the same mass flow of water only. In addition to lower pressure drop, pumping ice slurries is advantageous because of the large latent and sensible heat cooling capacity stored in the ice compared to only sensible heat in chilled water. For example, an ice-water slurry with a 20% ice fraction (by mass) has a mass flow rate that is 70% less than the mass flow rate required for a chilled water system cooling and equivalent load. The greatly reduced mass flow combined with the friction reducing effects of ice-water slurries results in a total savings of 83% in pumping power. Therefore, a substantial savings potential exists for capital costs and system operating costs in ice-water slurry district cooling systems.

Winters, P.J.

1990-01-01T23:59:59.000Z

324

Modeling Landfast Sea Ice by Adding Tensile Strength  

Science Conference Proceedings (OSTI)

Landfast ice is sea ice that forms and remains fixed along a coast, where it is either attached to the shore or held between shoals or grounded icebergs. The current generation of sea ice models is not capable of reproducing certain aspects of ...

Christof König Beatty; David M. Holland

2010-01-01T23:59:59.000Z

325

AIM-94-0800 Effect of Initial Ice Roughness  

E-Print Network (OSTI)

ice accretion phase. Using5close-up photography and videography Hansman has studied the initial phase of ice accretion. At warm temperatures, a runback zone aft of the rough zone is observed. WaterAIM-94-0800 Effect of Initial Ice Roughness on Airfoil Aerodynamics M. Bragg, M. Kerho and M

Bragg, Michael B.

326

Dynamics of Ice Nucleation on Water Repellent Surfaces Azar Alizadeh,*,  

E-Print Network (OSTI)

for nonicing applications. 1. INTRODUCTION Ice accretion on surfaces of aircraft, wind turbine blades, oil on surfaces with various wettabilities during and subsequent to single water droplet impact. We use surface wetting and icing phase transition events. Our methodology provides insights into multiple ice

Dhinojwala, Ali

327

Forecast of Icing Events at a Wind Farm in Sweden  

Science Conference Proceedings (OSTI)

This paper introduces a method to identify icing events using a physical icing model, driven by atmospheric data from the WRF model, and applies it to a wind park in Sweden. Observed wind park icing events were identified by deviation from an ...

Neil Davis; Andrea N. Hahmann; Niels-Erik Clausen; Mark Žagar

328

Effective Radius of Ice Particles in Cirrus and Contrails  

Science Conference Proceedings (OSTI)

This paper discusses the ratio C between the volume mean radius and the effective radius of ice particles in cirrus and contrails. The volume mean radius is proportional to the third root of the ratio between ice water content and number of ice ...

U. Schumann; B. Mayer; K. Gierens; S. Unterstrasser; P. Jessberger; A. Petzold; C. Voigt; J-F. Gayet

2011-02-01T23:59:59.000Z

329

Long-Term Ice Variability in Arctic Marginal Seas  

Science Conference Proceedings (OSTI)

Examination of records of fast ice thickness (1936–2000) and ice extent (1900–2000) in the Kara, Laptev, East Siberian, and Chukchi Seas provide evidence that long-term ice thickness and extent trends are small and generally not statistically ...

Igor V. Polyakov; Genrikh V. Alekseev; Roman V. Bekryaev; Uma S. Bhatt; Roger Colony; Mark A. Johnson; Valerii P. Karklin; David Walsh; Alexander V. Yulin

2003-06-01T23:59:59.000Z

330

Tracking of Ice Edges and Ice Floes by Wavelet Analysis of SAR Images  

Science Conference Proceedings (OSTI)

This paper demonstrates the use of wavelet transforms in the tracking of sequential ice features in the ERS-1 synthetic aperture radar (SAR) imagery, especially in situations where feature correlation techniques fail to yield reasonable results. ...

Antony K. Liu; Seelye Martin; Ronald Kwok

1997-10-01T23:59:59.000Z

331

Ice Crystals Produced by Expansion: Experiments and Application to Aircraft-produced Ice  

Science Conference Proceedings (OSTI)

The production of ice crystals as a result of the expansion and cooling of moist air was investigated by laboratory experiment. In particular, the warmest expanded air temperature that produces crystals was sought as a function of the initial ...

T. C. Foster; J. Hallett

1993-04-01T23:59:59.000Z

332

Snow Depth on Arctic Sea Ice  

Science Conference Proceedings (OSTI)

Snow depth and density were measured at Soviet drifting stations on multiyear Arctic sea ice. Measurements were made daily at fixed stakes at the weather station and once- or thrice-monthly at 10-m intervals on a line beginning about 500 m from ...

Stephen G. Warren; Ignatius G. Rigor; Norbert Untersteiner; Vladimir F. Radionov; Nikolay N. Bryazgin; Yevgeniy I. Aleksandrov; Roger Colony

1999-06-01T23:59:59.000Z

333

Arctic Sea Ice Albedo from AVHRR  

Science Conference Proceedings (OSTI)

The seasonal cycle of surface albedo of sea ice in the Arctic is estimated from measurements made with the Advanced Very High Resolution Radiometer (AVHRR) on the polar-orbiting satellites NOAA-10 and NOAA-11. The albedos of 145 200-km-square ...

R. W. Lindsay; D. A. Rothrock

1994-11-01T23:59:59.000Z

334

Visual simulation of ice crystal growth  

Science Conference Proceedings (OSTI)

The beautiful, branching structure of ice is one of the most striking visual phenomena of the winter landscape. Yet there is little study about modeling this effect in computer graphics. In this paper, we present a novel approach for visual simulation ...

Theodore Kim; Ming C. Lin

2003-07-01T23:59:59.000Z

335

Piling aids gravity in ice resistance  

SciTech Connect

The design and construction of foundations for offshore drilling platforms are described. To allow the base contact areas and ballast requirements to be minimized, thus allowing minimization of ice forces, a combined shallow mat and pile or spud founded system is proposed.

Bea, R.G.; Nour-Omid, S.; Coull, T.B.; Potter, R.E.; Bivens, H.R.

1984-08-01T23:59:59.000Z

336

Dynamics and energetics of the cloudy boundary layer in simulations of off-ice flow in the marginal ice zone  

E-Print Network (OSTI)

kinetic energy even in the present case where very strong surface heat fluxes occur. Ice-phase. Inclusion of the ice phase significantly affected the radiative budget as compared to purely liquid clouds, illustrating the importance of ice-phase­radiative couplings for accurate simulations of arctic clouds

Harrington, Jerry Y.

337

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

Science Conference Proceedings (OSTI)

A stand-alone sea ice model is tuned and validated using satellite-derived, basinwide observations of sea ice thickness, extent, and velocity from the years 1993 to 2001. This is the first time that basin-scale measurements of sea ice thickness ...

Paul A. Miller; Seymour W. Laxon; Daniel L. Feltham; Douglas J. Cresswell

2006-04-01T23:59:59.000Z

338

The control of ice storage systems  

SciTech Connect

The tradeoffs between chiller and tank capacity for different load profiles and two storage strategies are evaluated in this article. Air-conditioning systems that employ ice storage incorporate equipment that produces ice during one period and melts it in another period to provide cooling for the building. In designing such systems, there are two basic strategies to consider: full-load and partial-load. In a full-load strategy, the entire daytime cooling energy is met using only cooling supplied by the ice storage tank. In a partial-load strategy, the chiller and the storage are used simultaneously to meet the load. With a full-load strategy, the tank capacity must be sufficient to meet the entire energy requirement, and the chiller capacity must be sufficient to recharge the tank during the night-time. In a partial-load strategy, a smaller chiller and tank than that for a full-load strategy are required, and there are many combinations of the two that will meet a given building load. The design and sizing of the components of an ice storage system depend not only on the desired strategy and total daily cooling energy but also on other factors. The maximum load dictates the amount of cooling required at any time. The cooling rate provided by an ice filled tank is not constant, but decreases as the ice inventory drops, and the time that the maximum load occurs is important. Thus, there is an interaction between the building load profile and tank size. In addition, the flow rate of the circulating fluid through the tank and the cooling coil may limit the supply air temperatures that may be reached. Thus, the circulating fluid flow rate must be sufficient to provide the desired rates of cooling to the building. The challenge to the design engineer is to size the components to meet the building load at all times at the lowest system cost. Effective designs must acknowledge the dynamic performance of the ice storage system.

Carey, C.W. [Amana Corp., IA (United States); Mitchell, J.W.; Beckman, W.A. [Univ. of Wisconsin, Madison, WI (United States)

1995-05-01T23:59:59.000Z

339

An Investigation of Laboratory-Grown "Ice Spikes"  

E-Print Network (OSTI)

We have investigated the formation of 10-50 mm long ``ice spikes'' that sometimes appear on the free surface of water when it solidifies. By freezing water under different conditions, we measured the probability of ice spike formation as a function of: 1) the air temperature in the freezing chamber, 2) air motion in the freezing chamber (which promotes evaporative cooling), 3) the quantity of dissolved salts in the water, and 4) the size, shape, and composing material of the freezing vessel. We found that the probability of ice spike formation is greatest when the air temperature is near -7 C, the water is pure, and the air in the freezing chamber is moving. Even small quantities of dissolved solids greatly reduce the probability of ice spike formation. Under optimal conditions, approximately half the ice cubes in an ordinary ice cube tray will form ice spikes. Guided by these observations, we have examined the Bally-Dorsey model for the formation of ice spikes. In this model, the density change during solidification forces supercooled water up through a hollow ice tube, where it freezes around the rim to lengthen the tube. We propose that any dissolved solids in the water will tend to concentrate at the tip of a growing ice spike and inhibit its growth. This can qualitatively explain the observation that ice spikes do not readily form using water containing even small quantities of dissolved solids.

K. G. Libbrecht; K. Lui

2003-10-12T23:59:59.000Z

340

Magnetic Reversal of an Artificial Square Ice: Dipolar Correlation and Charge Ordering  

SciTech Connect

Magnetic reversal of an artificial square ice pattern subject to a sequence of magnetic fields applied slightly off the diagonal axis is investigated via magnetic force microscopy of the remanent states that result. Sublattice independent reversal is observed via correlated incrementally pinned flip cascades along parallel dipolar chains, as evident from analysis of vertex populations and dipolar correlation functions. Weak dipolar interactions between adjacent chains favour antialignment and give rise to weak charge ordering of 'monopole' vertices during the reversal process.

Stein A.; Morgan J.P.; Langridge S.; Marrows C.H.

2011-10-13T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Chemical Characterization of Individual Particles and Residuals of Cloud Droplets and Ice Crystals Collected On Board Research Aircraft in the ISDAC 2008 Study  

Science Conference Proceedings (OSTI)

Although it has been shown that size of atmospheric particles has a direct correlation with their ability to act as cloud droplet and ice nuclei, the influence of composition of freshly emitted and aged particles in nucleation processes is poorly understood. In this work we combine data from field measurements of ice nucleation with chemical imaging of the sampled particles to link aerosol composition with ice nucleation ability. Field measurements and sampling were conducted during the Indirect and Semidirect Aerosols Campaign (ISDAC) over Barrow, Alaska, in the springtime of 2008. In-situ ice nucleation measurements were conducted using a Continuous Flow Diffusion Chamber (CFDC). Measured number concentrations of ice nuclei (IN) varied from frequent values of 0.01 per liter to more than 10 per liter. Residuals of airborne droplets and ice crystals were collected through a counterflow virtual impactor (CVI). The compositions of individual atmospheric particles and the residuals were studied using Computer Controlled Scanning Electron Microscopy with Energy Dispersive X-ray analysis (CCSEM/EDX) and Scanning Transmission X-ray Microscopy coupled with Near Edge X-ray Absorption Fine Structure spectroscopy (STXM/NEXAFS). Chemical analysis of cloud particle residuals collected during an episode of high ice nucleation suggests that both size and composition may influence aerosol's ability to act as IN. The STXM/NEXAFS chemical composition maps of individual residuals have characteristic structures of either inorganic or black carbon cores coated by organic materials. In a separate flight, particle samples from a biomass burning plume were collected. Although it has previously been suggested that episodes of biomass burning contribute to increased numbers of highly effective ice nuclei, in this episode we observed that only a small fraction were effective ice nuclei. Most of the particles from the biomass plume episode were smaller in size and were composed of homogeneous organic material without identifiable cores.

Hiranuma, Naruki; Brooks, Sarah D.; Moffet, Ryan C.; Glen, Andrew; Laskin, Alexander; Gilles, Marry K.; Liu, Peter; MacDonald, A. M.; Strapp, J. Walter; McFarquhar, Greg

2013-06-24T23:59:59.000Z

342

Ice slurry cooling research: Microscale study of ice particles characteristics, role of freezing point depressant, and influence on slurry fluidity  

DOE Green Energy (OSTI)

The influences of freezing-point-depressants on ice slurry characteristics in the form of ice slurry fluidity and on the microscale ice particle features are studied. The results identify microscale features of ice particles such as surface roughness that greatly influence slurry fluidity that are altered favorably by the use of a freezing point depressant. The engineering of a workable and efficient ice slurry cooling system depends very strongly on the characteristics of the individual ice particles in the slurry and, in turn, on the method of ice production. Findings from this study provide guidance on the fluidity and handleability of slurry produced by several methods currently under development and already many achieved.

Hayashi, K.; Kasza, K.

2000-05-03T23:59:59.000Z

343

under a Creative Commons License. Climate of the Past Ice-driven CO2 feedback on ice volume  

E-Print Network (OSTI)

Abstract. The origin of the major ice-sheet variations during the last 2.7 million years is a long-standing mystery. Neither the dominant 41 000-year cycles in ?18O/ice-volume during the late Pliocene and early Pleistocene nor the late-Pleistocene oscillations near 100 000 years is a linear (“Milankovitch”) response to summer insolation forcing. Both responses must result from non-linear behavior within the climate system. Greenhouse gases (primarily CO2) are a plausible source of the required non-linearity, but confusion has persisted over whether the gases force ice volume or are a positive feedback. During the last several hundred thousand years, CO2 and ice volume (marine ?18O) have varied in phase at the 41 000-year obliquity cycle and nearly in phase within the ?100 000-year band. This timing rules out greenhouse-gas forcing of a very slow ice response and instead favors ice control of a fast CO2 response. In the schematic model proposed here, ice sheets responded linearly to insolation forcing at the precession and obliquity cycles prior to 0.9 million years ago, but CO2 feedback amplified the ice response at the 41 000-year period by a factor of approximately two. After 0.9 million years ago, with slow polar cooling, ablation weakened. CO2 feedback continued to amplify ice-sheet growth every 41 000 years, but weaker ablation permitted some ice to survive insolation maxima of low intensity. Step-wise growth of these longerlived ice sheets continued until peaks in northern summer insolation produced abrupt deglaciations every ?85 000 to ?115 000 years. Most of the deglacial ice melting resulted from the same CO2/temperature feedback that had built the ice sheets. Several processes have the northern geographic origin, as well as the requisite orbital tempo and phasing, to be candidate mechanisms for ice-sheet control of CO2 and their own feedback. 1

W. F. Ruddiman

2006-01-01T23:59:59.000Z

344

Searching for sterile neutrinos in ice  

E-Print Network (OSTI)

Oscillation interpretation of the results from the LSND, MiniBooNE and some other experiments requires existence of sterile neutrino with mass $\\sim 1$ eV and mixing with the active neutrinos $|U_{\\mu 0}|^2 \\sim (0.02 - 0.04)$. It has been realized some time ago that existence of such a neutrino affects significantly the fluxes of atmospheric neutrinos in the TeV range which can be tested by the IceCube Neutrino Observatory. In view of the first IceCube data release we have revisited the oscillations of high energy atmospheric neutrinos in the presence of one sterile neutrino. Properties of the oscillation probabilities are studied in details for various mixing schemes both analytically and numerically. The energy spectra and angular distributions of the $\

Soebur Razzaque; A. Yu. Smirnov

2011-04-07T23:59:59.000Z

345

Anvil characteristics as seen by C-POL during the Tropical Warm Pool International Cloud Experiment (TWP-ICE)  

E-Print Network (OSTI)

The Tropical Pacific Warm Pool International Cloud Experiment (TWP-ICE) took place in Darwin, Australia in early 2006. C-band radar data from this experiment were used to characterize tropical anvil areal coverage, height, and thickness during the month-long field campaign. The morphology, evolution, and longevity of the anvil were analyzed as well as the relationship of the anvil to the rest of the precipitating system. In addition, idealized in-cloud radiative heating profiles were created based on the anvil observations. The anvil was separated into mixed (i.e., echo base below 6 km) and ice only categories. The experiment areal average coverage for both types of anvil was between 4-5% of the radar grid. Ice anvil thickness averaged 2.8 km and mixed anvil thickness averaged 6.7 km. No consistent diurnal signal was seen in the anvil, implying that the life cycle of the parent convection was of first order importance in determining the anvil height, thickness, and area. Areal peaks show that mixed anvil typically formed out of the stratiform region. Peak production in ice anvil usually followed the mixed anvil peak by 1-3 hr. Anvil typically lasted 4-10 hr after the initial convective rain area peak. The TWP-ICE experienced three distinct regimes: the active monsoon, dry monsoon, and break periods. During the entire experiment (except the active monsoon period) there was a strong negative correlation between ice anvil thickness and ice anvil height, a strong positive correlation between ice anvil area and thickness, and a greater variance in ice anvil bottom than ice anvil top. Anvil produced during the active regime had the most dramatic in-cloud radiative response with a maximum cooling of 0.45�° K day-1 at 12 km, a maximum heating of 3�° K day-1 at 9 km, and a secondary maximum heating of 1.2�° K day-1 at 5 km.

Frederick, Kaycee Loretta

2006-12-01T23:59:59.000Z

346

Why could ice ages be unpredictable?  

E-Print Network (OSTI)

It is commonly accepted that the variations of Earth's orbit and obliquity control the timing of Pleistocene glacial-interglacial cycles. Evidence comes from power spectrum analysis of palaeoclimate records and from inspection of the timing of glacial and deglacial transitions. However, we do not know how tight this control is. Is it, for example, conceivable that random climatic fluctuations could cause a delay in deglaciation, bad enough to skip a full precession or obliquity cycle and subsequently modify the sequence of ice ages? To address this question, seven previously published conceptual models of ice ages are analysed by reference to the notion of generalised synchronisation. Insight is being gained by comparing the effects of the astronomical forcing with idealised forcings composed of only one or two periodic components. In general, the richness of the astronomical forcing allows for synchronisation over a wider range of parameters, compared to periodic forcing. Hence, glacial cycles may conceivably have remained paced by the astronomical forcing throughout the Pleistocene. However, all the models examined here also show a range of parameters for which the structural stability of the ice age dynamics is weak. This means that small variations in parameters or random fluctuations may cause significant shifts in the succession of ice ages if the system were effectively in that parameter range. Whether or not the system has strong structural stability depends on the amplitude of the effects associated with the astronomical forcing, which significantly differ across the different models studied here. The possibility of synchronisation on eccentricity is also discussed and it is shown that a high Rayleigh number on eccentricity, as recently found in observations, is no guarantee of reliable synchronisation.

Michel Crucifix

2013-02-06T23:59:59.000Z

347

On water ice formation in interstellar clouds  

E-Print Network (OSTI)

A model is proposed for the formation of water ice mantles on grains in interstellar clouds. This occurs by direct accretion of monomers from the gas, be they formed by gas or surface reactions. The model predicts the existence of a threshold in interstellar light extinction, A(v), which is mainly determined by the adsorption energy of water molecules on the grain material; for hydrocarbon material, chemical simulation places this energy between 0.5 and 2 kcal/mole, which sets the visible exctinction threshold at a few magnitudes, as observed. Once the threshold is crossed, all available water molecules in the gas are quickly adsorbed, forming an ice mantle, because the grain cools down and the adsorption energy on ice is higher than on bare grain. The model also predicts that the thickness of the mantle, and, hence, the optical thickness at 3 mu, grow linearly with A(v), as observed, with a slope which depends upon the total amount of water in the gas. Chemical simulation was also used to determine the adsorption sites and energies of O and OH on hydrocarbons, and study the dynamics of formation of water molecules by surface reactions with gaseous H atoms, as well as their chances of sticking in situ.

Renaud Papoular

2005-07-06T23:59:59.000Z

348

Wind-electric ice making investigation  

DOE Green Energy (OSTI)

The village power group at the National Renewable Energy Laboratory (NREL) has been researching the most practical and cost-effective means for producing ice from off-grid wind-electric power systems since 1993. The first phase of the project demonstrated that commercial vapor-compression ice makers could operate effectively when powered by a variable speed permanent magnet wind generator. In the second phase of the project, steady-state and dynamic numerical models of these systems were developed and experimentally validated. The third phase of the project was thorough steady-state and dynamic testing of a commercial 1.1 ton ice maker unit powered by a commercial 12 kW wind turbine alternator on an NREL dynamometer test stand. With the data from phases 1--3 an economic feasibility analysis was performed. It is hoped that continued development, and eventually commercialization, of this concept will take place in the private sector in the form of small business partnerships.

Holz, R.; Drouilhet, S.; Gevorgian, V.

1998-07-01T23:59:59.000Z

349

ICE LINES IN CIRCUMBINARY PROTOPLANETARY DISKS  

Science Conference Proceedings (OSTI)

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

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

2013-05-01T23:59:59.000Z

350

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

E-Print Network (OSTI)

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

351

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

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

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

352

STATEMENT OF WORK (SOW) TEMPLATE FOR ICE SUPPORT CONTRACTOR  

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

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

353

Orbital ice: An exact Coulomb phase on the diamond lattice  

SciTech Connect

We demonstrate the existence of an orbital Coulomb phase as the exact ground state of a p-orbital exchange Hamiltonian on the diamond lattice. The Coulomb phase is an emergent state characterized by algebraic dipolar correlations and a gauge structure resulting from local constraints (ice rules) of the underlying lattice models. For most ice models on the pyrochlore lattice, these local constraints are a direct consequence of minimizing the energy of each individual tetrahedron. On the contrary, the orbital ice rules are emergent phenomena resulting from the quantum orbital dynamics. We show that the orbital ice model exhibits an emergent geometrical frustration by mapping the degenerate quantum orbital ground states to the spin-ice states obeying the 2-in-2-out constraints on the pyrochlore lattice. We also discuss possible realization of the orbital ice model in optical lattices with p-band fermionic cold atoms.

Chern Giawei [Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States); Wu Congjun [Department of Physics, University of California, San Diego, California 92093 (United States)

2011-12-15T23:59:59.000Z

354

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

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

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

355

Light tracking through ice and water -- Scattering and absorption in heterogeneous media with Photonics  

E-Print Network (OSTI)

In the field of neutrino astronomy, large volumes of optically transparent matter like glacial ice, lake water, or deep ocean water are used as detector media. Elementary particle interactions are studied using in situ detectors recording time distributions and fluxes of the faint photon fields of Cherenkov radiation generated by ultra-relativistic charged particles, typically muons or electrons. The Photonics software package was developed to determine photon flux and time distributions throughout a volume containing a light source through Monte Carlo simulation. Photons are propagated and time distributions are recorded throughout a cellular grid constituting the simulation volume, and Mie scattering and absorption are realised using wavelength and position dependent parameterisations. The photon tracking results are stored in binary tables for transparent access through ANSI-C and C++ interfaces. For higher-level physics applications, like simulation or reconstruction of particle events, it is then possible to quickly acquire the light yield and time distributions for a pre-specified set of light source and detector properties and geometries without real-time photon propagation. In this paper the Photonics light propagation routines and methodology are presented and applied to the IceCube and Antares neutrino telescopes. The way in which inhomogeneities of the Antarctic glacial ice distort the signatures of elementary particle interactions, and how Photonics can be used to account for these effects, is described.

J. Lundberg; P. Miocinovic; K. Woschnagg; T. Burgess; J. Adams; S. Hundertmark; P. Desiati; P. Niessen

2007-02-05T23:59:59.000Z

356

Low energy spin dynamics in the spin ice, Ho2Sn2O7  

SciTech Connect

The magnetic properties of Ho{sub 2}Sn{sub 2}O{sub 7} have been investigated and compared to other spin ice compounds. Although the lattice has expanded by 3% relative to the better studied Ho{sub 2}Ti{sub 2}O{sub 7} spin ice, no significant changes were observed in the high temperature properties, T {approx}> 20 K. As the temperature is lowered and correlations develop, Ho{sub 2}Sn{sub 2}O{sub 7} enters its quantum phase at a slightly higher temperature than Ho{sub 2}Ti{sub 2}O{sub 7} and is more antiferromagnetic in character. Below 80 K a weak inelastic mode associated with the holmium nuclear spin system has been measured. The hyperfine field at the holmium nucleus was found to be {approx}700 T.

Ehlers, Georg [ORNL; Huq, Ashfia [ORNL; Diallo, Souleymane Omar [Oak Ridge National Laboratory (ORNL); Adriano, Cris [ORNL; Rule, K [Helmholtz-Zentrum Berlin; Cornelius, A. L. [University of Nevada, Las Vegas; Fouquet, Peter [Institut Laue-Langevin (ILL); Pagliuso, P G [Instituto de Fisica Gleb Wataghin, Unicamp, Brazil; Gardner, Jason [Indiana University

2012-01-01T23:59:59.000Z

357

Determining Cloud Ice Water Path from High-Frequency Microwave...  

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

Determining Cloud Ice Water Path from High-Frequency Microwave Measurements G. Liu Department of Meteorology Florida State University Tallahassee, Florida Introduction A better...

358

THE FORMATION AND REACTIONS OF OXIDANTS IN WATER ICE .  

E-Print Network (OSTI)

??This dissertation investigates the chemistry in water ice of radical species, such as OH and O, produced in radio-frequency discharge. This novel method of studying… (more)

Do, Nhut

2013-01-01T23:59:59.000Z

359

LIMITS TO ICE ON ASTEROIDS (24) THEMIS AND (65) CYBELE  

Science Conference Proceedings (OSTI)

We present optical spectra of (24) Themis and (65) Cybele, two large main-belt asteroids on which exposed water ice has recently been reported. No emission lines, expected from resonance fluorescence in gas sublimated from the ice, were detected. Derived limits to the production rates of water are {approx}ice because the measured albedos of Themis and Cybele are low ({approx}0.05-0.07). We also rule out models in which a large fraction of the surface is occupied by low-albedo ('dirty') water ice because dirty ice would be warm and would sublimate strongly enough for gaseous products to have been detected. If ice exists on these bodies it must be relatively clean (albedo {approx}>0.3) and confined to a fraction of the Earth-facing surface {approx}ice. If the ice is even more reflective (albedo {approx}>0.6), then the timescale for sublimation of an optically thick layer can rival the {approx}10{sup 3} yr interval between impacts with bodies this size. In this sense, exposure by impact may be a quasi steady-state feature of ice-containing asteroids at 3 AU.

Jewitt, David; Guilbert-Lepoutre, Aurelie, E-mail: jewitt@ucla.edu [Department of Earth and Space Sciences, UCLA, CA 90095 (United States)

2012-01-15T23:59:59.000Z

360

Reducing uncertainty in high-resolution sea ice models.  

Science Conference Proceedings (OSTI)

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

Peterson, Kara J.; Bochev, Pavel Blagoveston

2013-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Ice-templated Porous Ceramic Structures for Energy Applications  

Science Conference Proceedings (OSTI)

We have studied the ice-templating method for filters and battery electrode applications with the hierarchical pore structure. The porous Si structure was ...

362

Microstructural Characterization of Snow and Ice - Programmaster.org  

Science Conference Proceedings (OSTI)

Symposium, Recent Advances in Structural Characterization of Materials. Presentation Title, Microstructural Characterization of Snow and Ice. Author(s), I. Baker ...

363

Molecular Hydrogen Formation on Ice Under Interstellar Conditions  

E-Print Network (OSTI)

The results of experiments on the formation of molecular hydrogen on low density and high density amorphous ice surfaces are analyzed using a rate equation model. The activation energy barriers for the relevant diffusion and desorption processes are obtained. The more porous morphology of the low density ice gives rise to a broader spectrum of energy barriers compared to the high density ice. Inserting these parameters into the rate equation model under steady state conditions we evaluate the production rate of molecular hydrogen on ice-coated interstellar dust grains.

Hagai B. Perets; Ofer Biham; Giulio Manico; Valerio Pirronello; Joe Roser; Sol Swords; Gianfranco Vidali

2004-12-09T23:59:59.000Z

364

Rapid Cooling Using Ice Slurries for Industrial and Medical ...  

Because of the high energy content of ice slurry, its cooling capacity is many times greater than that of single-phase fluids. ... Wind Energy; Partners (27)

365

Hydrogen Fuel Pilot Plant and Hydrogen ICE Vehicle Testing  

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

Fuel Pilot Plant and Hydrogen ICE Vehicle Testing Jim Francfort (INEEL) Don Karner (ETA) 2004 Fuel Cell Seminar - San Antonio Session 5B - Hydrogen DOE - Advanced Vehicle Testing...

366

Development of ice hockey in Bosnia and Hertzegovina.  

E-Print Network (OSTI)

??Thesis explains general situation of ice hockey in Bosnia and Herzegovina, what is the current state of hockey and how did it came to the… (more)

Hasovic, Ermin

2012-01-01T23:59:59.000Z

367

Implication of puck possession on scoring changes in ice hockey.  

E-Print Network (OSTI)

??Much of the conventional wisdom in ice hockey suggests that moving the puck forward,towards the opponent's goal, is the best strategy for producing scoring chances.… (more)

Rollins, Laura

2010-01-01T23:59:59.000Z

368

Dynamic implementation in organizing an ice hockey tournament.  

E-Print Network (OSTI)

??The aim of this thesis is to follow, describe and evaluate the phases of organizing internationally recognized ice hockey tournament. The authors were following the… (more)

Ijäs, Juhani

2012-01-01T23:59:59.000Z

369

Evaluation of icing design criteria for lattice towers.  

E-Print Network (OSTI)

??Atmospheric icing is a major design factor for guyed lattice masts and transmission lines in Canada and many others countries with cold climate. Tall and… (more)

Korotkov, Oleksiy

2010-01-01T23:59:59.000Z

370

A Novel and Low-Cost Sea Ice Mass Balance Buoy  

Science Conference Proceedings (OSTI)

The understanding of sea ice mass balance processes requires continuous monitoring of the seasonal evolution of the ice thickness. While autonomous ice mass balance (IMB) buoys deployed over the past two decades have contributed to scientists' ...

Keith Jackson; Jeremy Wilkinson; Ted Maksym; David Meldrum; Justin Beckers; Christian Haas; David Mackenzie

2013-11-01T23:59:59.000Z

371

Efficient flowline simulations of ice-shelf/ocean interactions: Sensitivity studies with a fully coupled model  

Science Conference Proceedings (OSTI)

Thermodynamic flowline and plume models for the ice-shelf/ocean system simplify the ice and ocean dynamics sufficiently to allow extensive exploration of parameters affecting ice-sheet stability while including key physical processes. Comparison ...

Ryan T. Walker; David M. Holland; Byron R. Parizek; Richard B. Alley; Sophie M. J. Nowicki; Adrian Jenkins

372

Development of a Sea Ice Model for Use in Zonally Averaged Energy Balance Climate Models  

Science Conference Proceedings (OSTI)

A sea ice model for use in zonally averaged energy balance climate models is presented which includes the following processes: surface melting, basal freezing and melting, lateral melting from ice-flee water or growth of new ice in leads, ...

L. D. Danny Harvey

1988-12-01T23:59:59.000Z

373

Comparison of PARASOL Observations with Polarized Reflectances Simulated Using Different Ice Habit Mixtures  

Science Conference Proceedings (OSTI)

Insufficient knowledge of the habit distribution and the degree of surface roughness of ice crystals within ice clouds is a source of uncertainty in the forward light scattering and radiative transfer simulations of ice clouds used in downstream ...

Benjamin H. Cole; Ping Yang; Bryan A. Baum; Jerome Riedi; Laurent C.-Labonnote; Francois Thieuleux; Steven Platnick

2013-01-01T23:59:59.000Z

374

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

Science Conference Proceedings (OSTI)

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

Petra Heil; William D. Hibler III

2002-11-01T23:59:59.000Z

375

Ice, Snow and Water: impacts of climate change on California and Himalayan Asia  

E-Print Network (OSTI)

Sustainability BRIEFING NOTE  Ice, Snow  and Water: impacts light absorption of snow and ice as pollutants darken theAsian region of snow, ice, water, and mountains, with huge

Fenner, R. A.

2009-01-01T23:59:59.000Z

376

Suppression of ICE and Apoptosis in Mammary Epithelial Cells by Extracellular Matrix  

E-Print Network (OSTI)

Suppression of ICE and Apoptosis in Mammary Epithelial Cellsmodulate the expression of ICE remain to be elucidated, asdo the in vivo substrates for ICE or related enzymes and the

Boudreau, Nancy

2011-01-01T23:59:59.000Z

377

Web-Ice: Integrated Data Collection and Analysis for Macromolecular Crystallography  

E-Print Network (OSTI)

results. A summary list is also available in Blu-Ice.Figure 7: SSRL Web-Ice interface displaying the summarizedTable 1: Programs used by Web-Ice for data analysis. Program

Gonzalez, Ana

2008-01-01T23:59:59.000Z

378

A QUANTUM MECHANICAL APPROACH TO THE VELOCITY OF DISLOCATIONS IN ICE  

E-Print Network (OSTI)

~, A. ~ Higashi, A. , Physics of Ice, edited by N. Riehl, B.THE VELOCITY OF DISLOCATIONS IN ICE RECEIVED LAWRENCE A. R.the velocity of dislocations in ice ref. (3,4) with which we

Forouhi, A.R.

2011-01-01T23:59:59.000Z

379

Using Ice to Mimic Nacre: From Structural Materials to Artificial Bone  

E-Print Network (OSTI)

Using Ice to Mimic Nacre: From Structural Materials tohere how the physics of ice formation can be used to developphenomenon, the freezing of sea ice, which occurs at the

Deville, Sylvain; Saiz, Eduardo; Nalla, Ravi K.; Tomsia, Antoni P.

2005-01-01T23:59:59.000Z

380

Modeled winter sea ice variability and the North Atlantic Oscillation: a multi-century perspective  

E-Print Network (OSTI)

leading mode in a coupled sea ice-ocen model. J Clim 16:009-0550-7 Modeled winter sea ice variability and the Northrelationship between winter sea ice vari- ability and the

Strong, Courtenay; Magnusdottir, Gudrun

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Simulating mixed-phase Arctic stratus clouds: sensitivity to ice initiation mechanisms  

E-Print Network (OSTI)

M. : Role of a parameterized ice-phase mi- crophysics in anof contact nucleation in ice phase initiation in clouds, J.simulated, process of ice phase initiation due to freezing

Sednev, I.

2008-01-01T23:59:59.000Z

382

Simulating mixed-phase Arctic stratus clouds: Sensitivity to ice initiation mechanisms  

E-Print Network (OSTI)

M. : Role of a parameterized ice-phase micro- physics in anconcentration (N i ) for ice phase in experiments with icei L ?1 Table 8. Composite ice phase effective radius (R ei )

Sednev, I.

2009-01-01T23:59:59.000Z

383

Retrieval of Ice Cloud Parameters Using the Advanced Microwave Sounding Unit  

Science Conference Proceedings (OSTI)

An algorithm is developed to derive cloud ice water path (IWP) and ice particle effective diameters De from the advanced microwave sounding unit (AMSU) measurements. In the algorithm, both IWP and De are related to the ice particle scattering ...

Limin Zhao; Fuzhong Weng

2002-04-01T23:59:59.000Z

384

Web-Ice: Integrated Data Collection and Analysis for Macromolecular Crystallography  

E-Print Network (OSTI)

in Blu-Ice. Figure 7: SSRL Web-Ice interface displaying theRadiation Laboratory (SSRL), and subsequently adapted forsystems — Blu-Ice / DCSS at SSRL (McPhillips et al. , 2002)

Gonzalez, Ana

2008-01-01T23:59:59.000Z

385

Sensitivity of CAM5-Simulated Arctic Clouds and Radiation to Ice Nucleation Parameterization  

Science Conference Proceedings (OSTI)

Sensitivity of Arctic clouds and radiation in the Community Atmospheric Model, version 5, to the ice nucleation process is examined by testing a new physically based ice nucleation scheme that links the variation of ice nuclei (IN) number ...

Shaocheng Xie; Xiaohong Liu; Chuanfeng Zhao; Yuying Zhang

2013-08-01T23:59:59.000Z

386

Ice Loads on a Lattice Tower Estimated by Weather Station Data  

Science Conference Proceedings (OSTI)

Atmospheric ice loads are a major design criterion of tall structures in cold regions. In this paper the possibility to derive the design ice loads using analysis of meteorological observations made routinely at a weather station is studied. Ice ...

Eva Sundin; Lasse Makkonen

1998-05-01T23:59:59.000Z

387

Detection of Atmospheric Muon Neutrinos with the IceCube 9-String Detector  

E-Print Network (OSTI)

Neutrinos with the IceCube 9-String Detector A. Achterberg,Neutrinos with the IceCube 9-String Detector The IceCube17 me- ters apart in strings of 60. Strings are arranged on

Achterberg, A.; IceCube Collaboration

2008-01-01T23:59:59.000Z

388

Amplified Inception of European Little Ice Age by Sea Ice–Ocean–Atmosphere Feedbacks  

Science Conference Proceedings (OSTI)

The inception of the Little Ice Age (~1400–1700 AD) is believed to have been driven by an interplay of external forcing and climate system internal variability. While the hemispheric signal seems to have been dominated by solar irradiance and ...

Flavio Lehner; Andreas Born; Christoph C. Raible; Thomas F. Stocker

2013-10-01T23:59:59.000Z

389

Amplified inception of European Little Ice Age by sea ice-ocean-atmosphere feedbacks  

Science Conference Proceedings (OSTI)

The inception of the Little Ice Age (~1400-1700 AD) is believed to have been driven by an interplay of external forcing and climate system-internal variability. While the hemispheric signal seems to have been dominated by solar irradiance and ...

Flavio Lehner; Andreas Born; Christoph C. Raible; Thomas F. Stocker

390

Heat recovery anti-icing system  

SciTech Connect

A heat recovery anti-icing system is disclosed. The heat recovery system includes a blower which removes air from the air flow path of a combustion turbine power generating system and circulates the air through a heat exchanger located in the exhaust stack of the combustion turbine. The heated air circulating through the heat exchanger is returned to an inlet filter compartment in the air flow path so as to maintain the temperature of the air in the inlet filter compartment at an elevated level.

Cummins, J.R.

1982-05-11T23:59:59.000Z

391

Limits on a muon flux from neutralino annihilations in the Sun with the IceCube 22-string detector  

E-Print Network (OSTI)

the Sun with the IceCube 22-string detector R. Abbasi, 24 Y.in the Sun with the IceCube 22-string detector The IceCubeperformed with the IceCube 22-string neutrino detector using

Klein, Spencer; IceCube Collaboration

2009-01-01T23:59:59.000Z

392

Performance and Uncertainty of CNR1 Net Radiometers during a One-Year Field Comparison  

Science Conference Proceedings (OSTI)

Net radiation flux in correlation with surface energy budget, snowmelt, glacier ice balance, and forest or agricultural flux exchange investigations is measured in numerous field experiments. Instrument costs and energy consumption versus ...

Dominik Michel; Rolf Philipona; Christian Ruckstuhl; Roland Vogt; Laurent Vuilleumier

2008-03-01T23:59:59.000Z

393

A Comparison of Different Sea Level Pressure Analysis Fields in the East Greenland Sea  

Science Conference Proceedings (OSTI)

Geostrophic wind fields, used to drive a numerical sea ice model, were calculated from three sources of sea-level pressure. The pressures obtained from the National Weather Service's operational analysis system, which are also included as part of ...

W. B. Tucker III

1983-06-01T23:59:59.000Z

394

Validation of ice skating protocol to predict aerobic power in hockey players.  

E-Print Network (OSTI)

??Validation ofan Ice Skating Protocol to Predict Aerobic Power in Hockey Players In assessing the physiological capacity of ice hockey players, researchers have often reported… (more)

Petrella, Nicholas J.

2006-01-01T23:59:59.000Z

395

Prevalence and intent of aggressive behaviors in elite women's ice hockey.  

E-Print Network (OSTI)

??There has been a substantial amount of research on aggression in men's ice hockey. Although there is some research on aggression in women's ice hockey,… (more)

Shapcott, Kim M.

2004-01-01T23:59:59.000Z

396

A Markov Model for Seasonal Forecast of Antarctic Sea Ice  

Science Conference Proceedings (OSTI)

A linear Markov model has been developed to simulated and predict the short-term climate change in the Antarctic, with particular emphasis on sea ice variability. Seven atmospheric variables along with sea ice were chosen to define the state of ...

Dake Chen; Xiaojun Yuan

2004-08-01T23:59:59.000Z

397

Radar Backscattering of Microwaves by Spongy Ice Spheres  

Science Conference Proceedings (OSTI)

The radar backscattering cross section of a spongy ice hailstone—a mixture of ice and liquid water—depends on its size, shape and dielectric function. There are two types of theories of the effective dielectric function of two-component mixtures: ...

Craig F. Bohren; Louis J. Battan

1982-11-01T23:59:59.000Z

398

Observation of Ice Crystal Formation in Lower Arctic Atmosphere  

Science Conference Proceedings (OSTI)

Clear sky ice crystals or diamond dust displays are observed in polar regions, both remote and populated; when the temperature falls to ?20°C and where abundant sources of water vapor are present. In remote areas of the Arctic, these ice crystals ...

Takeshi Ohtake; Kolf Jayaweera; Ken-Ichi Sakurai

1982-12-01T23:59:59.000Z

399

Numerical Simulation of Dry Ice Cloud Seeding Experiments  

Science Conference Proceedings (OSTI)

The application of a two-dimensional, time-dependent cloud model to describe the effects of dry ice cloud seeding is demonstrated. A conservation equation and associated auxiliary equations for the mixing ratio of dry ice (CO2) are presented. The ...

Fred J. Kopp; Harold D. Orville; Richard D. Farley; John H. Hirsch

1983-09-01T23:59:59.000Z

400

Parameterizing Turbulent Exchange over Sea Ice in Winter  

Science Conference Proceedings (OSTI)

The Surface Heat Budget of the Arctic Ocean (SHEBA) experiment produced 18 000 h of turbulence data from the atmospheric surface layer over sea ice while the ice camp drifted for a year in the Beaufort Gyre. Multiple sites instrumented during ...

Edgar L. Andreas; P. Ola G. Persson; Andrey A. Grachev; Rachel E. Jordan; Thomas W. Horst; Peter S. Guest; Christopher W. Fairall

2010-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Anchored Clathrate Waters Bind Antifreeze Proteins to Ice  

DOE Green Energy (OSTI)

The mechanism by which antifreeze proteins (AFPs) irreversibly bind to ice has not yet been resolved. The ice-binding site of an AFP is relatively hydrophobic, but also contains many potential hydrogen bond donors/acceptors. The extent to which hydrogen bonding and the hydrophobic effect contribute to ice binding has been debated for over 30 years. Here we have elucidated the ice-binding mechanism through solving the first crystal structure of an Antarctic bacterial AFP. This 34-kDa domain, the largest AFP structure determined to date, folds as a Ca{sup 2+}-bound parallel beta-helix with an extensive array of ice-like surface waters that are anchored via hydrogen bonds directly to the polypeptide backbone and adjacent side chains. These bound waters make an excellent three-dimensional match to both the primary prism and basal planes of ice and in effect provide an extensive X-ray crystallographic picture of the AFP{vert_ellipsis}ice interaction. This unobstructed view, free from crystal-packing artefacts, shows the contributions of both the hydrophobic effect and hydrogen bonding during AFP adsorption to ice. We term this mode of binding the 'anchored clathrate' mechanism of AFP action.

C Garnham; R Campbell; P Davies

2011-12-31T23:59:59.000Z

402

Third international workshop on ice storage for cooling applications  

DOE Green Energy (OSTI)

The third international workshop on ice storage for cooling applications which was informal and interactive in nature, was open to persons interested in all ice-growing technologies and in ice storage, both seasonal and diurnal. Presentations were made on some 20 topics, ranging from freezers in Alaska to ice cooling of commercial jet aircraft. Workshop tours included visits to ice-storage systems at Commonwealth Edison's facilities in Bolingbrook and Des Plaines Valley, the A.C. Neilsen builing in Northbrook, and the new State of Illinois Center in Chicago. The first workshop in the present series considered the future of ice storage and predicted applications in the agricultural sector, desalinization, and commercial ice production. Progress has been rapid in the intervening two years, and an important topic at the third workshop was the possible use of ''warm ices'' (clathrate hydrates) for energy storage. This report consists primarily of abstracts of presentations made at the workshop. Persons wishing to obtain further information about particular papers should contact the speakers directly; speakers' addresses and telephone numbers are listed in this report.

Gorski, A.J. (comp.)

1986-04-01T23:59:59.000Z

403

Laboratory and Wind Tunnel Evaluations of the Rosemount Icing Detector  

Science Conference Proceedings (OSTI)

The Rosemount model 871FA ice detector was evaluated during a number of laboratory and wind tunnel studies. The purpose of this evaluation was to determine the sensitivity of the detector to a variety of icing conditions and to determine its ...

Darrel Baumgardner; Alfred Rodi

1989-12-01T23:59:59.000Z

404

An informed source separation of astrophysical ice analogs  

Science Conference Proceedings (OSTI)

The analysis of astrophysical ices and the determination of the compounds that are present in the molecular clouds play a fundamental role in order to predict the future evolution of the cloud, e.g., its transformation to protostellar bodies or the appearance ... Keywords: Astrophysical ices, Bayesian analysis, Blind source separation, Ensemble learning, Independent component analysis, Positiveness, Priors

Jorge Igual; Raul Llinares

2007-09-01T23:59:59.000Z

405

Pressurized Icing Tunnel for Graupel, Hail and Secondary Raindrop Production  

Science Conference Proceedings (OSTI)

The closed-circuit icing wind tunnel with pressure control serves for experiments on the growth and melting of ice particles, such as graupel and hailstones, and the observation of shedding of rain-sized drops by growing and melting hailstones. ...

Roland List; G. B. Lesins; F. García-García; D. B. McDonald

1987-09-01T23:59:59.000Z

406

Temperature Dependence of Static Charging in Ice Growing by Riming  

Science Conference Proceedings (OSTI)

Charge transfer between colliding ice particles is measured using a wind tunnel inside a cold room. A cylinder growing by riming in a wind tunnel was used as a target for collisions between 5 and 6 m s?1 with ice spheres of 100-µm diameter. The ...

Eldo E. Avila; Guillermo G. Aguirre Varela; Giorgio M. Caranti

1995-12-01T23:59:59.000Z

407

The Melting of Ice in Cold Stratified Water  

Science Conference Proceedings (OSTI)

We consider the melting of ice in cold water vertically stratified with salt. The study extends previous investigations of ice melting in cold water at uniform salinity and in warm water with a salinity gradient. We find, in agreement with the ...

Herbert E. Huppert; Edward G. Josberger

1980-06-01T23:59:59.000Z

408

A Reformulated Three-Layer Sea Ice Model  

Science Conference Proceedings (OSTI)

A model is presented that provides an efficient approximation to sea ice thermodynamics for climate studies. Semtner’s three-layer framework is used, but the brine content of the upper ice is represented with a variable heat capacity as is done ...

Michael Winton

2000-04-01T23:59:59.000Z

409

Wave-Induced Drift Force in the Marginal Ice Zone  

Science Conference Proceedings (OSTI)

Wind waves are commonly ignored when modeling the ice motion in the marginal ice zone. In order to estimate the importance of the wave forcing, an expression for the second-order wave-induced drift force on a floe exposed to a full directional ...

Diane Masson

1991-01-01T23:59:59.000Z

410

An Indirect Effect of Ice Nuclei on Atmospheric Radiation  

Science Conference Proceedings (OSTI)

A three-dimensional cloud-resolving model (CRM) with observed large-scale forcing is used to study how ice nuclei (IN) affect the net radiative flux at the top of the atmosphere (TOA). In all the numerical experiments carried out, the cloud ice ...

Xiping Zeng; Wei-Kuo Tao; Minghua Zhang; Arthur Y. Hou; Shaocheng Xie; Stephen Lang; Xiaowen Li; David O’C. Starr; Xiaofan Li; Joanne Simpson

2009-01-01T23:59:59.000Z

411

ENERGY BASED ICE COLLISION FORCES Claude Daley1  

E-Print Network (OSTI)

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

Daley, Claude

412

ENERGY BASED ICE COLLISION FORCES Claude Daley1  

E-Print Network (OSTI)

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

Daley, Claude

413

Characterization of a Modified Hexagonal Silver Iodide Ice Nucleus Aerosol  

Science Conference Proceedings (OSTI)

A new ice nucleant aerosol was produced by combustion of a 2% AgI-0.5 mole % Bil3-NH4I-acetone-water solution. The ice nucleating effectiveness of this aerosol is an order of magnitude greater than AgI alone at ?10°C. An X-ray powder analysis ...

Paul T. Scott; William G. Finnegan; Peter C. Sinclair

1989-08-01T23:59:59.000Z

414

Passive ice freezing-releasing heat pipe. [Patent application  

DOE Patents (OSTI)

A heat pipe device has been developed which permits completely passive ice formation and periodic release of ice without requiring the ambient temperature to rise above the melting point of water. This passive design enables the maximum amount of cooling capacity to be stored in the tank.

Gorski, A.J.; Schertz, W.W.

1980-09-29T23:59:59.000Z

415

EPRI Freezing Rain Ice Mapping Project: Region 4  

Science Conference Proceedings (OSTI)

To ensure reliable electric service, accurate predictions of ice loads are needed for the design and evaluation of new and existing transmission lines. This report presents ice load maps for the states of North and South Dakota and documents the methodology used to generate them.

1997-12-19T23:59:59.000Z

416

Fire in the Ice, Spring 2005  

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

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

417

Magnetic charge crystals imaged in artificial spin ice  

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

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

418

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

Science Conference Proceedings (OSTI)

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

L-B. Tremblay; M. Hakakian

2006-11-01T23:59:59.000Z

419

Ice in Clouds Experiment—Layer Clouds. Part I: Ice Growth Rates Derived from Lenticular Wave Cloud Penetrations  

Science Conference Proceedings (OSTI)

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

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

2011-11-01T23:59:59.000Z

420

Classification of Ice Crystal Shapes in Midlatitude Ice Clouds from Three Years of Lidar Observations over the SIRTA Observatory  

Science Conference Proceedings (OSTI)

This paper presents a study of ice crystal shapes in midlatitude ice clouds inferred from a technique based on the comparison of ray-tracing simulations with lidar depolarization ratio measured at 532 nm. This technique is applied to three years ...

Vincent Noel; Helene Chepfer; Martial Haeffelin; Yohann Morille

2006-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Enhancement of Sea Ice Drift due to the Dynamical Interaction between Sea Ice and a Coastal Ocean  

Science Conference Proceedings (OSTI)

Wind factor, the ratio of sea ice drift speed to surface wind speed, is a key factor for the dynamics of sea ice and is generally about 2%. In some coastal oceans, however, the wind factor tends to be larger near the coast. This study proposes the ...

Yoshihiro Nakayama; Kay I. Ohshima; Yasushi Fukamachi

2012-01-01T23:59:59.000Z

422

TWP-ICE Data from the GEWEX Cloud System Study: Data Integration for Model Evaluation (GCSSDIME)  

DOE Data Explorer (OSTI)

One of the most complete data sets of tropical cirrus and convection observations resulted from the Tropical Warm Pool - International Cloud Experiment (TWP-ICE) in the area around Darwin, Australia. The aim of the experiment is to examine convective cloud systems from their initial stages through the decaying and thin high level cirrus and measure their impact on the environment. The experiment design includes an unprecedented array of soundings and other information to support cloud resolving and other modeling studies as well as a large range of in-situ and remotely sensed observation platforms. A key component of the field campaign is a fleet of aircraft including the Dornier, Dimona, Egrett, Twin Otter, and Proteus. Together, these aircraft collected measurements of cloud properties and the meteorological environment from the planetary boundary layer up to 15 km high. The extensive ground network of cloud sensing radar, lidar and passive instruments are located on a ship and several ground sites throughout the experimental domain. This case study presents data from 19 Jan 2006 to 28 Feb 2006 and covers a region from 25S to 10S latitude and from 125E to 140E longitude.[Copied from http://gcss-dime.giss.nasa.gov/twp-ice/twp-ice.html

423

Remote Sensing D/H Ratios in Methane Ice: Temperature-Dependent Absorption Coefficients of CH3D in Methane Ice and in Nitrogen Ice  

E-Print Network (OSTI)

The existence of strong absorption bands of singly deuterated methane (CH3D) at wavelengths where normal methane (CH4) absorbs comparatively weakly could enable remote measurement of D/H ratios in methane ice on outer solar system bodies. We performed laboratory transmission spectroscopy experiments, recording spectra at wavelengths from 1 to 6 \\mum to study CH3D bands at 2.47, 2.87, and 4.56 \\mum, wavelengths where ordinary methane absorption is weak. We report temperature-dependent absorption coefficients of these bands when the CH3D is diluted in CH4 ice and also when it is dissolved in N2 ice, and describe how these absorption coefficients can be combined with data from the literature to simulate arbitrary D/H ratio absorption coefficients for CH4 ice and for CH4 in N2 ice. We anticipate these results motivating new telescopic observations to measure D/H ratios in CH4 ice on Triton, Pluto, Eris, and Makemake.

Grundy, W M; Bovyn, M J; Tegler, S C; Cornelison, D M

2011-01-01T23:59:59.000Z

424

Fire in the Ice, Summer 2004  

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

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

425

Fire in the Ice, Fall 2004  

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

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

426

Abrupt grain boundary melting in ice  

E-Print Network (OSTI)

The effect of impurities on the grain boundary melting of ice is investigated through an extension of Derjaguin-Landau-Verwey-Overbeek theory, in which we include retarded potential effects in a calculation of the full frequency dependent van der Waals and Coulombic interactions within a grain boundary. At high dopant concentrations the classical solutal effect dominates the melting behavior. However, depending on the amount of impurity and the surface charge density, as temperature decreases, the attractive tail of the dispersion force interaction begins to compete effectively with the repulsive screened Coulomb interaction. This leads to a film-thickness/temperature curve that changes depending on the relative strengths of these interactions and exhibits a decrease in the film thickness with increasing impurity level. More striking is the fact that at very large film thicknesses, the repulsive Coulomb interaction can be effectively screened leading to an abrupt reduction to zero film thickness.

L. Benatov; J. S. Wettlaufer

2004-12-30T23:59:59.000Z

427

A recent bifurcation in Arctic sea-ice cover  

E-Print Network (OSTI)

There is ongoing debate over whether Arctic sea-ice has already passed a 'tipping point', or whether it will do so in future, with several recent studies arguing that the loss of summer sea ice does not involve a bifurcation because it is highly reversible in models. Recently developed methods can detect and sometimes forewarn of bifurcations in time-series data, hence we applied them to satellite data for Arctic sea-ice cover. Here we show that a new low ice cover state has appeared from 2007 onwards, which is distinct from the normal state of seasonal sea ice variation, suggesting a bifurcation has occurred from one attractor to two. There was no robust early warning signal of critical slowing down prior to this bifurcation, consistent with it representing the appearance of a new ice cover state rather than the loss of stability of the existing state. The new low ice cover state has been sampled predominantly in summer-autumn and seasonal forcing combined with internal climate variability are likely respons...

Livina, Valerie N

2012-01-01T23:59:59.000Z

428

Baltimore Aircoil Company (BAC) ice storage test report  

DOE Green Energy (OSTI)

The Ice Storage Test Facility (ISTF) is designed to test commercial ice storage systems. Baltimore Aircoil Company (BAC) provided a storage tank equipped with coils designed for use with a liquid overfeed refrigeration system. Separate coils were also supplied for use with a secondary fluid system. The BAC ice storage system was tested over a wide range of operating conditions. System performance was satisfactory under both charging and discharging conditions. During the liquid-overfeed ice build cycle, the evaporator temperature closely matched the manufacturer's literature. The measured average brine temperatures were slightly higher than those given in the BAC literature (i.e., the BAC report is conservative). During discharge cycles, the storage tank outlet temperature remains nearly constant below 35{degree}F, rising only after most of the ice has been melted. The discharge performance was relatively unaffected by discharge rates or tank inlet temperatures. Based on these tests, a storage tank sized solely according to the latent ice storage capacity is capable of providing a relatively constant temperature to the load throughout most of the discharge cycle. This report describes BAC system performance fully under both charging and discharging conditions. Companion reports describe ISTF test procedures and ice-making efficiency test results that are common to many of the units tested. 10 refs., 30 figs., 7 tabs.

Stovall, T.K.

1991-03-01T23:59:59.000Z

429

Deactivation of ice nuclei due to atmospherically relevant surface coatings  

SciTech Connect

The ice nucleation characteristics of Arizona Test Dust (ATD) and illite clay, surrogates for atmospheric ice nuclei, have been determined at the Aerosol Interactions and Dynamics in the Atmosphere (AIDA) chamber located at the Research Center Karlsruhe in Germany. The objective of this research was to determine the effect of sulphuric acid and ammonium sulphate coatings on the ability of these mineral dust surrogates to nucleate ice in an environment where particles realistically compete for water vapor. Coated ATD particles required higher saturations at all investigated temperatures, from -20 to -45º C, than did identical uncoated particles. Freezing of coated particles often required saturations approaching those for the homogeneous freezing of aqueous solutions of the coating material alone. Less pronounced effects were found for illite although the presence of a coating consistently increased the saturation or decreased the temperature required for ice formation. Analysis of ice residue at the single particle level suggests that the first coated particles to freeze had thinner or incomplete coatings when compared to particles that froze later in the expansion. This observation highlights a need to verify coating properties since an assumption of homogeneity of a group of coated aerosol may be incorrect. The increase in saturation ratio for freezing suggests that gas-phase uptake of sulphates, a large fraction of which are due to anthropogenic emissions, will reduce the ice and mixed-phase cloud formation potential of atmospheric ice nuclei.

Cziczo, Daniel J.; Froyd, Karl D.; Gallavardin, S. J.; Moehler, Ottmar; Benz, Stefan; Saathoff, Harald; Murphy, Daniel M.

2009-11-23T23:59:59.000Z

430

Air conditioning system with supplemental ice storing and cooling capacity  

DOE Patents (OSTI)

The present air conditioning system with ice storing and cooling capacity can generate and store ice in its pipe assembly or in an ice storage tank particularly equipped for the system, depending on the type of the air conditioning system. The system is characterized in particular in that ice can be produced and stored in the air conditioning system whereby the time of supplying cooled air can be effectively extended with the merit that the operation cycle of the on and off of the compressor can be prolonged, extending the operation lifespan of the compressor in one aspect. In another aspect, ice production and storage in great amount can be performed in an off-peak period of the electrical power consumption and the stored ice can be utilized in the peak period of the power consumption so as to provide supplemental cooling capacity for the compressor of the air conditioning system whereby the shift of peak and off-peak power consumption can be effected with ease. The present air conditioning system can lower the installation expense for an ice-storing air conditioning system and can also be applied to an old conventional air conditioning system.

Weng, Kuo-Lianq (Taichung, TW); Weng, Kuo-Liang (Taichung, TW)

1998-01-01T23:59:59.000Z

431

Photohadronic Origin of the TeV-PeV Neutrinos Observed in IceCube  

E-Print Network (OSTI)

We perform an unbiased search of the origin of the recently observed 28 events above ~30 TeV in the IceCube neutrino observatory, assuming that these are (apart from the atmospheric background) of astrophysical origin produced by photohadronic interactions. Instead of relying on the normalization of the neutrino flux, we demonstrate that spectral shape and flavor composition can be used to constrain or identify the source class. In order to quantify our observations, we use a model where the target photons are produced by the synchrotron emission of co-accelerated electrons, and we include magnetic field effects on the secondary muons, pions, and kaons. We find that the lack of observed events with energies much larger than PeV points towards sources with strong magnetic fields, which do not exhibit a direct correlation between highest cosmic ray and neutrino energies. While the simplest AGN models with efficient proton acceleration plausibly describe the current data at about the 3sigma confidence level, we show that IceCube can rule out that the observed neutrinos stem from the sources of the ultra-high energy cosmic rays with a factor of ten increased statistics at more than 5sigma if the current observations are confirmed. A possible caveat are sources with strong magnetic fields and high Lorentz factors, such as magnetic energy dominated GRBs.

Walter Winter

2013-07-10T23:59:59.000Z

432

Metastable hydronium ions in UV-irradiated ice  

SciTech Connect

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

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

2012-11-28T23:59:59.000Z

433

Ice Storms in the St. Lawrence Valley Region Kathleen F. Jones January 2003  

E-Print Network (OSTI)

of millions of people. The ice that accreted on trees and wires damaged electrical transmission be obtained from these photos. The analysis in this report relies on historical weather data and ice accretion://www.erdc.usace.army.mil CRREL and Simple ice accretion models incorpo- rate a physical model of the process of ice accre- tion

434

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

SciTech Connect

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

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

2010-09-01T23:59:59.000Z

435

APPROVED ICE STORAGE AIR CONDITIONERS Revised as of 06-18-2008  

E-Print Network (OSTI)

APPROVED ICE STORAGE AIR CONDITIONERS Revised as of 06-18-2008 The following vendors and their ice storage air conditioners models can be used in the ice storage air conditioner compliance option. Input details are listed below for the approved equipment. Manufacturer Ice Energy, Inc 9351 Eastman Park Drive

436

Ice Climbing in Clear Creek Canyon A climbing trip report by Glenn Murray  

E-Print Network (OSTI)

Ice Climbing in Clear Creek Canyon A climbing trip report by Glenn Murray SUMMARY: I climb ice in to ask about local climbing. The guys there told me there was ice nearby, in Clear Creek Canyon. I. Four pitches? Five? It was time to find a partner. The only ice climber I knew in Denver was a friend

437

Multiple sea-ice states and abrupt MOC transitions in a general circulation ocean model  

E-Print Network (OSTI)

Multiple sea-ice states and abrupt MOC transitions in a general circulation ocean model Yosef: 25 September 2012 Ã? Springer-Verlag Berlin Heidelberg 2012 Abstract Sea ice has been suggested, based-called ``sea-ice switch'' mech- anism. An important requirement for this mechanism is that multiple sea-ice

Ashkenazy, Yossi "Yosef"

438

Snow and Ice Control Best Management Practices Parking Lots, Sidewalks, Roads  

E-Print Network (OSTI)

Snow and Ice Control Best Management Practices Parking Lots, Sidewalks, Roads Minnesota Circuit opportunity to improve the way we manage snow and ice in Minnesota. By using snow and ice control best safer--while saving money and protecting water quality. Current Situation The snow and ice maintenance

Minnesota, University of

439

Recent ice loss from the Fleming and other glaciers, Wordie Bay, West Antarctic Peninsula  

E-Print Network (OSTI)

of phase aliasing caused by high rates of ice deformation. [6] Glacier grounding lines were derived fromRecent ice loss from the Fleming and other glaciers, Wordie Bay, West Antarctic Peninsula E. Rignot ice thickness data from 2002, reveal that the glaciers flowing into former Wordie Ice Shelf, West

Kansas, University of

440

Mapping the tidal motion of an Antarctic ice shelf from space  

E-Print Network (OSTI)

grounded and floating ice). Loss of clarity of phase cycles (noise) ­ likely due to changes on the ice-eyes" suggests a ridgeline is running under the ice. The phase (colour) cycles represent the difference in tidalMapping the tidal motion of an Antarctic ice shelf from space Malcolm McMillan1 , Andrew Shepherd

Note: This page contains sample records for the topic "ice rink field" 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

New Phases of Water Ice Predicted at Megabar Pressures Burkhard Militzer1, 2  

E-Print Network (OSTI)

New Phases of Water Ice Predicted at Megabar Pressures Burkhard Militzer1, 2 and Hugh F. Wilson1 1 and Cmcm symmetry at 7.6 and 15.5 Mbar, respectively. The known high pressure ice phases VII, VIII, X positions between nearest O atoms in the ice X, Pbcm, and Pbca phases. PACS numbers: Water ice is one

Militzer, Burkhard

442

Surface Energy and Surface Proton Order of Ice Ih Ding Pan,1,2  

E-Print Network (OSTI)

ambient pressures, ice Ih is the stable phase down to $72 K [2], below which a proton ordered (ferroelectric) phase known as ice XI becomes the ground state. In practice, the order- ing transformation from ice Ih to the lowest total energy ice XI phase rarely happens since, as the temperature is low- ered

Alavi, Ali

443

Physica B 338 (2003) 274283 Critical behavior of transport in sea ice  

E-Print Network (OSTI)

, the sea ice is effectively impermeable, while for higher temperatures the brine phase becomes connectedPhysica B 338 (2003) 274­283 Critical behavior of transport in sea ice K.M. Golden* Department materials such as sea ice, rocks, soils, snow, and glacial ice are composite media with complex, random

Golden, Kenneth M.

444

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

E-Print Network (OSTI)

The ®nal phase of dead-ice moraine development: processes and sediment architecture, Ko of Copenhagen, éster Voldgade 10, DK-1350, Copenhagen K, Denmark ABSTRACT Consecutive phases of de-icing of ice on the sediment succession. Generally, no inversion of the topography occurs during the ®nal phase of de-icing

Ingólfsson, �lafur

445

Influence of parameterized ice habit on simulated mixed phase Arctic clouds  

E-Print Network (OSTI)

Influence of parameterized ice habit on simulated mixed phase Arctic clouds Alexander Avramov1 12 February 2010. [1] The phase partitioning of cloud mass between liquid and ice in mixed phase clouds and its dependence on ambient ice nuclei (IN) concentrations and ice habit parameterizations

446

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

Science Conference Proceedings (OSTI)

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

Marie-Noëlle Houssais

1988-02-01T23:59:59.000Z

447

FNS Presentation - Hydrogen Station & Hydrogen ICE Vehicles Operation  

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

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

448

Limits to Ice on Asteroids (24) Themis and (65) Cybele  

E-Print Network (OSTI)

We present optical spectra of (24) Themis and (65) Cybele, two large main-belt asteroids on which exposed water ice has recently been reported. No emission lines, expected from resonance fluorescence in gas sublimated from the ice, were detected. Derived limits to the production rates of water are 0.3) and confined to a fraction of the Earth-facing surface 0.6) then the timescale for sublimation of an optically thick layer can rival the 10^3 yr interval between impacts with bodies this size. In this sense, exposure by impact may be a quasi steady-state feature of ice-containing asteroids at 3 AU.

Jewitt, D

2011-01-01T23:59:59.000Z

449

Minimalist Model of Ice Microphysics in Mixed-phase Stratiform Clouds  

SciTech Connect

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

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

2013-07-28T23:59:59.000Z

450

Thermal Energy Storage: Assessment of Ice Bear 30 Hybrid Air Conditioner  

Science Conference Proceedings (OSTI)

This report describes and documents the construction, performance, and application of a thermal energy storage system that uses ice as the storage medium. The system, Ice Bear 30 manufactured by Ice Energy Inc. located in Windsor, Colorado, is designed to provide cooling to interior spaces by circulating refrigerant within an additional evaporator coil added to a standard roof-top air conditioner. Ice storage systems exist, but what makes the Ice Bear 30 unique is its relatively small size (5 ton) for us...

2008-12-23T23:59:59.000Z

451

Searching for Cosmic Accelerators via IceCube  

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

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

452

Progress on a TWP-ICE Monsoon Case Study  

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

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

453

Jefferson Lab Science Series - Iceland: Dynamic Land of Ice and...  

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

Archive Next Video (The Physics of Baseball) The Physics of Baseball Iceland: Dynamic Land of Ice and Fire Dr. Richard S. Williams Jr. - U.S. Geological Survey February 8, 2002...

454

Climate Sensitivity to Continental Ice Sheet Size and Configuration  

Science Conference Proceedings (OSTI)

A version of the NCAR Community Climate Model (CCM) has been used to carry out a study of climate sensitivity to the size and distribution of continental ice sheets by comparing two perpetual season, fixed sea surface temperature (SST), winter ...

Richard A. Shinn; Eric J. Barron

1989-12-01T23:59:59.000Z

455

An Exploratory Study of Ice Nucleation by Soot Aerosols  

Science Conference Proceedings (OSTI)

The activities of nearly monodisperse soot particles as ice nuclei at temperatures below ?20°C were examined in a short series of experiments. A continuous slow expansion cloud chamber was used to cause cloud formation and growth on soot during ...

Paul J. DeMott

1990-10-01T23:59:59.000Z

456

Medical Ice Slurry Coolants for Inducing Targeted-Organ/Tissue...  

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

Kasza and Yue Wu (Sep. 2009) 804KB Development Of Ice Slurry Phase-Change Coolants For Industrial And Medical Applications K. Kasza, Y. Wu, J. Heine, D. Sheradon, and S. Lake...

457

Quantitative Ice Accretion Information from the Automated Surface Observing System  

Science Conference Proceedings (OSTI)

Freezing precipitation is a persistent winter weather problem that costs the United States millions of dollars annually. Costs and infrastructure disruption may be greatly reduced by ice-storm warnings issued by the National Weather Service (NWS),...

Charles C. Ryerson; Allan C. Ramsay

2007-09-01T23:59:59.000Z

458

The Replication of Ice Crystals Using Formvar: Techniques and Precautions  

Science Conference Proceedings (OSTI)

A number of precautions which should be taken during the replication of ice crystals using a Formvar solution have been identified. Several different forms of inaccurate and poor quality replicas are illustrated. Their causes have been isolated ...

D. J. Griggs; E. R. Jayaratne

1986-09-01T23:59:59.000Z

459

Interface limited growth of heterogeneously nucleated ice in supercooled water  

E-Print Network (OSTI)

Heterogeneous ice growth exhibits a maximum in freezing rate arising from the competition between kinetics and the thermodynamic driving force between the solid and liquid states. Here, we use molecular dynamics simulations to elucidate the atomistic details of this competition, focusing on water properties in the interfacial region along the secondary prismatic direction. The crystal growth velocity is maximized when the efficiency of converting interfacial water molecules to ice, collectively known as the attachment kinetics, is greatest. We find water molecules that contact the intermediate ice layer in concave regions along the atomistically roughened surface are more likely to freeze directly. The increased roughening of the solid surface at large undercoolings consequently plays an important limiting role on the rate of ice growth, as water molecules are unable to integrate into increasingly deeper surface pockets. These results provide insights into the molecular mechanisms for self-assembly of solid phases that are important in many biological and atmospheric processes.

Razvan A. Nistor; Thomas E. Markland; B. J. Berne

2013-08-29T23:59:59.000Z

460

Cloud Liquid Water and Ice Content Retrieval by Multiwavelength Radar  

Science Conference Proceedings (OSTI)

Cloud liquid water and ice content retrieval in precipitating clouds by the differential attenuation method using a dual-wavelength radar, as a function of the wavelength pair, is first discussed. In the presence of non-Rayleigh scatterers, ...

Nicolas Gaussiat; Henri Sauvageot; Anthony J. Illingworth

2003-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

Synoptic-Scale Influences of Snow Cover and Sea Ice  

Science Conference Proceedings (OSTI)

Daily observational data for thirty winters (1951–80) are used to test the hypothesis that anomalous distributions of snow and ice cover influence the intensification and/or trajectories of synoptic-scale cyclones. The pools of objectively chosen ...

Becky Ross; John E. Walsh

1986-10-01T23:59:59.000Z

462

The Classification of Ambiguous Ice Particle Shadowgraphs by Consensus  

Science Conference Proceedings (OSTI)

A major impediment to the development of computer algorithms for the automatic classification of ice particle types found in the atmosphere as measured by a Particle Measuring System two-dimensional probe is the difficulty of obtaining training ...

Rosemary M. Dyer; Morton Glass; Herbert E. Hunter

1985-12-01T23:59:59.000Z

463

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

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

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

464

Thermal desorption of CH4 retained in CO2 ice  

E-Print Network (OSTI)

CO2 ices are known to exist in different astrophysical environments. In spite of this, its physical properties (structure, density, refractive index) have not been as widely studied as those of water ice. It would be of great value to study the adsorption properties of this ice in conditions related to astrophysical environments. In this paper, we explore the possibility that CO2 traps relevant molecules in astrophysical environments at temperatures higher than expected from their characteristic sublimation point. To fulfil this aim we have carried out desorption experiments under High Vacuum conditions based on a Quartz Crystal Microbalance and additionally monitored with a Quadrupole Mass Spectrometer. From our results, the presence of CH4 in the solid phase above the sublimation temperature in some astrophysical scenarios could be explained by the presence of several retaining mechanisms related to the structure of CO2 ice.

R. Luna; C. Millan; M. Domingo; M. A. Satorre

2008-01-21T23:59:59.000Z

465

The TWP-ICE CRM Intercomparison Specification and First Results  

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

TWP-ICE CRM Intercomparison Specification and First Results Ann Fridlind (ann.fridlind@nasa.gov), Andrew Ackerman (andrew.ackerman@nasa.gov), Adrian Hill (adrian.hill@metoffice.gov...

466

Ice-making heat exchanger evaluation and test plan  

DOE Green Energy (OSTI)

Several approaches to making ice for district cooling are identified and their current status discussed. Recommendations for future work are given, with a detailed plan for one phase of the work. 13 refs., 5 figs.

Andrews, J.W.; Leigh, R.W.; Piraino, M.W.

1990-01-01T23:59:59.000Z

467

Microsoft Word - 11_4_09 ice maker.doc  

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

docket. In summary, the issues discussed during the call were an update on including ice maker energy into the refrigerator-freezer test procedure and questions on the status...

468

Microsoft Word - 11_19_09 ice mkaer.doc  

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

of the meeting was to update the Department on the status of AHAM's development of an ice maker energy test procedure. The attendees are as follows: Ronald Lewis, Department of...

469

Assessing the Rosemount Icing Detector with In Situ Measurements  

Science Conference Proceedings (OSTI)

In situ measurements of microphysics conditions, obtained during 38 research flights into winter storms, have been used to characterize the performance of a Rosemount Icing Detector (RID). Characteristics of the RID were determined under a wide ...

Stewart G. Cober; George A. Isaac; Alexei V. Korolev

2001-04-01T23:59:59.000Z

470

Ice Growth from the Vapor at ?5°C  

Science Conference Proceedings (OSTI)

Results are summarized and illustrated from a long series of experiments on ice growth from the vapor, nearly all in a very small range of conditions: ?5°C, slightly below liquid water saturation, with minimal environmental gradients and no ...

Charles A. Knight

2012-06-01T23:59:59.000Z

471

Ice Phase Parameterization in a Numerical Weather Prediction Model  

Science Conference Proceedings (OSTI)

This article presents the implementation of simple parameterization schemes for ice phase microphysics, with snow as a diagnostic variable. The microphysical schemes are used within a standard parameterization scheme for stratiform and convective ...

Viel Ødegaard

1997-03-01T23:59:59.000Z

472

A phase-space model for Pleistocene ice volume  

E-Print Network (OSTI)

We present a phase-space model that simulates Pleistocene ice volume changes based on Earth's orbital parameters. Terminations in the model are triggered by a combination of ice volume and orbital forcing and agree well with age estimates for Late Pleistocene terminations. The average phase at which model terminations begin is approximately 90 +/- 90 degrees before the maxima in all three orbital cycles. The large variability in phase is likely caused by interactions between the three cycles and ice volume. Unlike previous ice volume models, this model produces an orbitally driven increase in 100-kyr power during the mid-Pleistocene transition without any change in model parameters. This supports the hypothesis that Pleistocene variations in the 100-kyr power of glacial cycles could be caused, at least in part, by changes in Earth's orbital parameters, such as amplitude modulation of the 100-kyr eccentricity cycle, rather than changes within the climate system.

Imbrie, John Z; Lisiecki, Lorraine E

2011-01-01T23:59:59.000Z

473

Characterizations of Aircraft Icing Environments that Include Supercooled Large Drops  

Science Conference Proceedings (OSTI)

Measurements of aircraft icing environments that include supercooled large drops (SLD) greater than 50 ?m in diameter have been made during 38 research flights. These flights were conducted during the First and Third Canadian Freezing Drizzle ...

Stewart G. Cober; George A. Isaac; J. Walter Strapp

2001-11-01T23:59:59.000Z

474

Greenland Ice Sheet Surface Air Temperature Variability: 1840–2007  

Science Conference Proceedings (OSTI)

Meteorological station records and regional climate model output are combined to develop a continuous 168-yr (1840–2007) spatial reconstruction of monthly, seasonal, and annual mean Greenland ice sheet near-surface air temperatures. Independent ...

Jason E. Box; Lei Yang; David H. Bromwich; Le-Sheng Bai

2009-07-01T23:59:59.000Z

475

American Indian Complex to Cool Off Using Ice Storage System...  

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

main complex will use an ice storage system estimated to save 644,000 kilowatt hours of electricity a year. "Certainly it was a choice to save money in the long run," says Nathan...

476

Neutrino Physics with the IceCube Detector  

E-Print Network (OSTI)

Science, O?ce of Nu- clear Physics, of the U.S. Departmentjkiryluk?lake?louise?lbl NEUTRINO PHYSICS WITH THE ICECUBESNRs). Other IceCube physics topics include searches for

Kiryluk, Joanna; IceCube Collaboration

2008-01-01T23:59:59.000Z

477

Hydrological and biogeochemical cycling along the Greenland ice sheet margin  

E-Print Network (OSTI)

Global warming has led to a significant increase in Greenland ice sheet (GrIS) melt and runoff since 1990, resulting in escalated export of fresh water and associated sediment to the surrounding North Atlantic and Arctic ...

Bhatia, Maya Pilar, 1979-

2012-01-01T23:59:59.000Z

478

Relative Humidity in Liquid, Mixed-Phase, and Ice Clouds  

Science Conference Proceedings (OSTI)

The results of in situ observations of the relative humidity in liquid, mixed, and ice clouds typically stratiform in nature and associated with mesoscale frontal systems at temperatures ?45°C < Ta < ?5°C are presented. The data were collected ...

Alexei Korolev; George A. Isaac

2006-11-01T23:59:59.000Z

479

The Accretion of Ice Particles by Rime during Dry Growth  

Science Conference Proceedings (OSTI)

Freezing nuclei were used as tracers in experiments to determine whether ice particles are accreted by rime during dry growth. Experiments were conducted in a wind tunnel and in natural clouds at a mountaintop observatory. The results in both ...

Terry Deshler

1985-01-01T23:59:59.000Z

480

Slope-Enhanced Fission of Salty Hetons under Sea Ice  

Science Conference Proceedings (OSTI)

Ocean responses to a single brine source under ice and over a sloping bottom are investigated in numerical experiments. Brine sources considered herein are often much stronger than that anticipated from a single seawater freezing event in a time ...

Shenn-Yu Chao; Ping-Tung Shaw

2000-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice rink field" 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

The Greenland Ice Sheet Response to Transient Climate Change  

Science Conference Proceedings (OSTI)

This study applies a multiphase, multiple-rheology, scalable, and extensible geofluid model to the Greenland Ice Sheet (GrIS). The model is driven by monthly atmospheric forcing from global climate model simulations. Novel features of the model, ...

Diandong Ren; Rong Fu; Lance M. Leslie; Jianli Chen; Clark R. Wilson; David J. Karoly

2011-07-01T23:59:59.000Z

482

The Growth of Ice Crystals by Molecular Diffusion  

Science Conference Proceedings (OSTI)

The mass transfer of water molecules by diffusion onto ice particles is best described by their Sherwood number (Sh), a dimensionless quantity, which combines molecular and convective effects and depends on the airflow as represented by the ...

Hyun Youk; Roland List; Theophilus Ola

2006-06-01T23:59:59.000Z

483

Identification of Small Ice Cloud Particles Using Passive Radiometric Observations  

Science Conference Proceedings (OSTI)

There is currently significant uncertainty about the extent to which cirrus clouds are composed of “small” ice crystals smaller than about 20-?m effective radius. This is due in part to concerns that in situ measurements from aircraft are plagued ...

Steven J. Cooper; Timothy J. Garrett

2010-11-01T23:59:59.000Z

484

The Effect of Stochastic Cloud Structure on the Icing Process  

Science Conference Proceedings (OSTI)

Current understanding of the icing process through collisions between a surface and supercooled cloud droplets is based upon two factors. First, for a given temperature, when the cloud liquid water content, W, exceeds a critical value, wc (the ...

A. R. Jameson; A. B. Kostinski

2000-09-01T23:59:59.000Z

485

Relationships between Arctic Sea Ice and Clouds during Autumn  

Science Conference Proceedings (OSTI)

The connection between sea ice variability and cloud cover over the Arctic seas during autumn is investigated by analyzing the 40-yr ECMWF Re-Analysis (ERA-40) products and the Television and Infrared Observation Satellite (TIROS) Operational ...

Axel J. Schweiger; Ron W. Lindsay; Steve Vavrus; Jennifer A. Francis

2008-09-01T23:59:59.000Z

486

Wave Attenuation and Wave Drift in the Marginal Ice Zone  

Science Conference Proceedings (OSTI)

Surface gravity waves in a viscous rotating ocean are studied theoretically when they penetrate an area covered by highly concentrated brashlike ice. The motion is described by a Lagrangian formulation, and the brash is modeled by a viscous ...

Jan Erik Weber

1987-12-01T23:59:59.000Z

487

Comment on Magnetic Monopole Excitations in Spin Ice  

E-Print Network (OSTI)

It has been proposed recently \\cite{son} that excitations in Spin Ice can be of the form of magnetic monopoles that does not obey the Dirac Quantization Condition. It is also well known \\cite{rj} that the above scenario leads to non-associativity among translation generators. It will be interesting to see how the monopole picture in Spin Ice survives in the light of the latter observation.

Subir Ghosh

2008-01-21T23:59:59.000Z

488

Atmospheric neutrino oscillations and tau neutrinos in ice  

E-Print Network (OSTI)

The main goal of the IceCube Deep Core Array is to search for neutrinos of astrophysical origins. Atmospheric neutrinos are commonly considered as a background for these searches. We show here that cascade measurements in the Ice Cube Deep Core Array can provide strong evidence for tau neutrino appearance in atmospheric neutrino oscillations. A careful study of these tau neutrinos is crucial, since they constitute an irreducible background for astrophysical neutrino detection.

Gerardo Giordano; Olga Mena; Irina Mocioiu

2010-04-20T23:59:59.000Z

489

Discrimination of Mixed- versus Ice-Phase Clouds Using Dual-Polarization Radar with Application to Detection of Aircraft Icing Regions  

Science Conference Proceedings (OSTI)

Dual-polarization radar measurements and in situ measurements of supercooled liquid water and ice particles within orographic cloud systems are used to develop probabilistic criteria for identifying mixed-phase versus ice-phase regions of sub-0°C ...

David M. Plummer; Sabine Göke; Robert M. Rauber; Larry Di Girolamo

2010-05-01T23:59:59.000Z

490

Evaluation of a 45° Slant Quasi-Linear Radar Polarization State for Distinguishing Drizzle Droplets, Pristine Ice Crystals, and Less Regular Ice Particles  

Science Conference Proceedings (OSTI)

A remote sensing capability is needed to detect clouds of supercooled, drizzle-sized droplets, which are a major aircraft icing hazard. Discrimination among clouds of differing ice particle types is also important because both the presence and ...

Roger F. Reinking; Sergey Y. Matrosov; Robert A. Kropfli; Bruce W. Bartram

2002-03-01T23:59:59.000Z

491

Obtaining Best Estimates for the Microphysical and Radiative Properties of Tropical Ice Clouds from TWP-ICE In Situ Microphysical Observations  

Science Conference Proceedings (OSTI)

Best estimates of the bulk microphysical and radiative properties (ice water content, visible extinction, effective radius, and total concentration) are derived for three case studies of tropical ice clouds sampled during the Tropical Warm Pool ...

A. Protat; G. M. McFarquhar; J. Um; J. Delanoë

2011-04-01T23:59:59.000Z

492

Terminating the Last Interglacial: The Role of Ice Sheet–Climate Feedbacks in a GCM Asynchronously Coupled to an Ice Sheet Model  

Science Conference Proceedings (OSTI)

Climatic deterioration in northeastern Canada following the last interglacial resulted in the formation and abrupt expansion of the Laurentide Ice Sheet. However, the physical mechanisms leading to rapid ice sheet expansion are not well ...

Adam R. Herrington; Christopher J. Poulsen

2012-03-01T23:59:59.000Z

493

Improved Sea Ice Shortwave Radiation Physics in CCSM4: The Impact of Melt Ponds and Aerosols on Arctic Sea Ice  

Science Conference Proceedings (OSTI)

The Community Climate System Model, version 4 has revisions across all components. For sea ice, the most notable improvements are the incorporation of a new shortwave radiative transfer scheme and the capabilities that this enables. This scheme ...

Marika M. Holland; David A. Bailey; Bruce P. Briegleb; Bonnie Light; Elizabeth Hunke

2012-03-01T23:59:59.000Z

494

Arctic Sea Ice and Freshwater Changes Driven by the Atmospheric Leading Mode in a Coupled Sea Ice–Ocean Model  

Science Conference Proceedings (OSTI)

Observational and modeling studies have indicated recent large changes of sea ice and hydrographic properties in the Arctic Ocean. However, the observational database is sufficiently sparse that the mechanisms responsible for the recent changes ...

Xiangdong Zhang; Moto Ikeda; John E. Walsh

2003-07-01T23:59:59.000Z

495

The Heat Balance of a Riming Graupel Pellet and the Charge Separation during Ice–Ice Collisions  

Science Conference Proceedings (OSTI)

It has been suggested that the sign of charge acquired by a riming graupel pellet during ice crystal interactions depends on its surface state being negative when it is evaporating and positive when growing by vapor diffusion. Experiments were ...

E. R. Jayaratne

1993-09-01T23:59:59.000Z

496

Application of a Polythermal Three-Dimensional Ice Sheet Model to the Greenland Ice Sheet: Response to Steady-State and Transient Climate Scenarios  

Science Conference Proceedings (OSTI)

Steady-state and transient climate-change computations are performed with the author’s three-dimensional polythermal ice sheet model Simulation Code for Polythermal Ice Sheets for the Greenland Ice Sheet. The distinctive feature of this model is ...

Ralf Greve

1997-05-01T23:59:59.000Z

497

The Role of Sea Ice in 2×CO2 Climate Model Sensitivity. Part I: The Total Influence of Sea Ice Thickness and Extent  

Science Conference Proceedings (OSTI)

As a first step in investigating the effects of sea ice changes on the climate sensitivity to doubled atmospheric CO2, the authors use a standard simple sea ice model while varying the sea ice distributions and thicknesses in the control run. ...

D. Rind; R. Healy; C. Parkinson; D. Martinson

1995-03-01T23:59:59.000Z

498

Analysis and Forecasting of Sea Ice Conditions with Three-Dimensional Variational Data Assimilation and a Coupled Ice–Ocean Model  

Science Conference Proceedings (OSTI)

A three-dimensional variational data assimilation (3DVAR) system has been developed to provide analyses of the ice–ocean state and to initialize a coupled ice–ocean numerical model for forecasting sea ice conditions. This study focuses on the ...

Alain Caya; Mark Buehner; Tom Carrieres

2010-02-01T23:59:59.000Z

499

De-icing thermostat for air conditioners  

SciTech Connect

This patent describes an electronic thermostat adapted to be connected to an air-cooling apparatus to control the operative state of the apparatus. The thermostat includes a means for generating a digital electrical signal representative of a desired temperature setpoint and means for generating a digital electrical signal representative of the ambient temperature at the thermostat. The improvement described here comprises: means for generating control signals for the aircooling apparatus in order to inhibit the accumulation of ice on the cooling element of the air-cooling apparatus when the ambient temperature is above the temperature setpoint; means, responsive to the control signals, for deenergizing the compressor in the air-cooling apparatus for a first preselected period of time whenever the compressor is determined to have run continuously for a second preselected period of time; and means for adaptively adjusting the length of at least one of the first or second preselected periods of time as a function of the change in the rate of change of the ambient temperature.

Levine, M.R.

1986-12-09T23:59:59.000Z

500

Radiation chemistry in ammonia-water ices  

SciTech Connect

We studied the effects of 100 keV proton irradiation on films of ammonia-water mixtures between 20 and 120 K. Irradiation destroys ammonia, leading to the formation and trapping of H{sub 2}, N{sub 2}, NO, and N{sub 2}O, the formation of cavities containing radiolytic gases, and ejection of molecules by sputtering. Using infrared spectroscopy, we show that at all temperatures the destruction of ammonia is substantial, but at higher temperatures (120 K), it is nearly complete ({approx}97% destroyed) after a fluence of 10{sup 16} ions/cm{sup 2}. Using mass spectroscopy and microbalance gravimetry, we measure the sputtering yield of our sample and the main components of the sputtered flux. We find that the sputtering yield depends on fluence. At low temperatures, the yield is very low initially and increases quadratically with fluence, while at 120 K the yield is constant and higher initially. The increase in the sputtering yield with fluence is explained by the formation and trapping of the ammonia decay products, N{sub 2} and H{sub 2}, which are seen to be ejected from the ice at all temperatures.

Loeffler, M. J. [Astrochemistry Laboratory, NASA GSFC, Code 691, Greenbelt, Maryland 20775 (United States); Laboratory for Atomic and Surface Physics, Engineering Physics, University of Virginia, Charlottesville, Virginia 22904 (United States); Raut, U.; Baragiola, R. A. [Laboratory for Atomic and Surface Physics, Engineering Physics, University of Virginia, Charlottesville, Virginia 22904 (United States)

2010-02-07T23:59:59.000Z