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to obtain the most current and comprehensive results.


1

Maximum Surface Albedo of Seasonally Snow-Covered Lands in the Northern Hemisphere  

Science Conference Proceedings (OSTI)

Areally weighted clear sky surface albedo of snow-covered land in the middle and high latitudes of the Northern Hemisphere was measured from satellite imagery in A 1×1° latitude-longitude cells. The study area included 87% of the land polewards ...

David A. Robinson; George Kukla

1985-05-01T23:59:59.000Z

2

Forward-Looking Assimilation of MODIS-Derived Snow-Covered Area into a Land Surface Model  

Science Conference Proceedings (OSTI)

Snow cover over land has a significant impact on the surface radiation budget, turbulent energy fluxes to the atmosphere, and local hydrological fluxes. For this reason, inaccuracies in the representation of snow-covered area (SCA) within a land ...

Benjamin F. Zaitchik; Matthew Rodell

2009-02-01T23:59:59.000Z

3

New Geostationary Satellite–Based Snow-Cover Algorithm  

Science Conference Proceedings (OSTI)

Snow cover plays an important role in the climate system by changing the energy and mass transfer between the atmosphere and the surface. Reliable observations of the snow cover are difficult to obtain without satellites. This paper introduces a ...

Niilo Siljamo; Otto Hyvärinen

2011-06-01T23:59:59.000Z

4

Simulation of Seasonal Snowcover Based on Air Temperature and Precipitation  

Science Conference Proceedings (OSTI)

A simulation is performed for the time variation in depth of seasonal snow with variable air temperature and precipitation in Japan. Processes of snow densification and snowmelt are considered for snow depth calculation. The using parameters are ...

Hideaki Motoyama

1990-11-01T23:59:59.000Z

5

Modeling Snow-Cover Heterogeneity over Complex Arctic Terrain for Regional and Global Climate Models  

Science Conference Proceedings (OSTI)

The small-scale (10 to 100 m) and local-scale (100 m to 10 km) effects of topography (elevation, slope, and aspect) and snow redistribution by wind on the evolution of the snowmelt are investigated. The chosen study area is the 142 km2 Upper ...

Stephen J. Déry; Wade T. Crow; Marc Stieglitz; Eric F. Wood

2004-02-01T23:59:59.000Z

6

Snake Locomotion  

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

made him slippery as an eel. We took him to Trailside Museum and dumped him out on the glass top of a showcase where he wriggled and skidded in vain attempts to escape. Snakes...

7

Process-level controls on CO2 fluxes from a seasonally snow-covered subalpine meadow soil, Niwot Ridge, Colorado  

E-Print Network (OSTI)

Research, University of Colorado, Boulder, CO, USA e-mail:of Geography, University of Colorado, Boulder, CO, USA B.Sciences, University of Colorado, Boulder, CO, USA G.

2009-01-01T23:59:59.000Z

8

Winter and summer nitrous oxide and nitrogen oxides fluxes from a seasonally snow-covered subalpine meadow at Niwot Ridge, Colorado  

E-Print Network (OSTI)

of Geography, University of Colorado, Boulder, CO, USA M. W.Alpine Research, University of Colorado, Boulder, CO, USA D.Sciences, University of Colorado, Boulder, CO, USA B. Hall

2009-01-01T23:59:59.000Z

9

Geochemistry of a volcanic hydrothermal system at Mount Spurr, Alaska.  

E-Print Network (OSTI)

??Mount Spurr is an ice and snow-covered andesitic volcano located at the northern extent of the Aleutian arc in south central Alaska. Previous workers have… (more)

Garchar, Laura

2012-01-01T23:59:59.000Z

10

Circulation Response to Eurasian versus North American Anomalous Snow Scenarios in the Northern Hemisphere with an AGCM Coupled to a Slab Ocean Model  

Science Conference Proceedings (OSTI)

The difference between snow-covered and snow-free conditions is the most climatically significant natural seasonal change the land surface can experience. Most GCM studies investigating snow–atmosphere interactions have focused on impacts of ...

Gina R. Henderson; Daniel J. Leathers; Brian Hanson

2013-03-01T23:59:59.000Z

11

Assistant Secretary of State speaks on arms control | National...  

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

for the Bureau of Arms Control, Verification and Compliance, traveled to snow-covered Seattle to share her insights about this important topic on January 17. She discussed arms...

12

Effects of Spatial Aggregation of Initial Conditions and Forcing Data on Modeling Snowmelt Using a Land Surface Scheme  

Science Conference Proceedings (OSTI)

Small-scale topography and snow redistribution have important effects on snow-cover heterogeneity and the timing, rate, and duration of spring snowmelt in mountain tundra environments. However, land surface schemes (LSSs) are usually applied as a ...

Pablo F. Dornes; John W. Pomeroy; Alain Pietroniro; Diana L. Verseghy

2008-08-01T23:59:59.000Z

13

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

14

NREL: Learning - Solar Energy Basics  

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

Energy Basics Photo of a solar electric system in Colorado with snow-covered mountain peaks in the background. Solar panels installed on a home in Colorado. Solar is the Latin word...

15

Effects of Nontropical Forest Cover on Climate  

Science Conference Proceedings (OSTI)

The albedo of a forest with snow on the ground is much less than that of snow-covered low vegetation such as tundra. As a result, simulation of the Northern Hemisphere climate, when fully forested south of a suitably chosen taiga/tundra boundary (...

J. Otterman; M-D. Chou; A. Arking

1984-05-01T23:59:59.000Z

16

Polar Cloud and Surface Classification Using AVHRR Imagery: An Intercomparison of Methods  

Science Conference Proceedings (OSTI)

Six Advanced Very High-Resolution Radiometer local area coverage (AVHPR LAC) arctic scenes are classified into ten classes. These include water, solid sea ice, broken sea ice, snow-covered mountains, snow-free land, and five cloud types. Three ...

R. M. Welch; S. K. Sengupta; A. K. Goroch; P. Rabindra; N. Rangaraj; M. S. Navar

1992-05-01T23:59:59.000Z

17

Anomalous Behavior of the Atmospheric Surface Layer over a Melting Snowpack  

Science Conference Proceedings (OSTI)

During March, 1978 on a snow-covered field near Lee Vining, California, measurements were made that included: 1) variations above the snow surface of the net radiative flux and the profile of wind speed, air temperature and relative humidity; and ...

Isidore Halberstam; John P. Schieldge

1981-03-01T23:59:59.000Z

18

Snow/Cloud Discrimination with Multispectral Satellite Measurements  

Science Conference Proceedings (OSTI)

An algorithm is developed and evaluated for discriminating between clouds, snow-covered land and snow-free land in satellite image data. The multispectral technique uses daytime images of NOAA AVHRR channels 1 (0.63 ?m), 3 (3.7 ?m), and 4 (11.0 ...

Robert C. Allen Jr.; Philip A. Durkee; Carlyle H. Wash

1990-10-01T23:59:59.000Z

19

Effects of Cloudiness on the High-Latitude Surface Radiation Budget  

Science Conference Proceedings (OSTI)

Ten years of hourly data on radiation, cloud and temperature collected at Resolute, Canada (75°N) show that with respect to clear skies: (i) clouds of all types, heights and extents heat the surface when it is snow-covered; (ii) low clouds ...

J. Graham Cogley; A. Henderson-Sellers

1984-05-01T23:59:59.000Z

20

Effects of Averaging and Separating Soil Moisture and Temperature in the Presence of Snow Cover in a SVAT and Hydrological Model for a Southern Ontario, Canada, Watershed  

Science Conference Proceedings (OSTI)

The energy and water balances at the earth's surface are dramatically influenced by the presence of snow cover. Therefore, soil temperature and moisture for snow-covered and snow-free areas can be very different. In computing these soil state ...

S. R. Fassnacht; Z-L. Yang; K. R. Snelgrove; E. D. Soulis; N. Kouwen

2006-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "trailside snowcover rpd-49" 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

Bats  

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

Bats Bats Nature Bulletin No. 147 March 20, 1948 Forest Preserve District of Cook County William N. Erickson, President Roberts Mann, Supt of Conservation BATS Flying squirrels only glide. Bats are the only fur bearing animals that truly fly, and they've been doing it for at least 50 million years Twisting, looping and zig-zagging through the air, at dusk and dawn, they catch flying insects more skillfully than the swallow or the chimney swift. Each twist and turn means another insect caught, A bat can consume one-half its weight in insects in a single twilight. Harmful? No, We have one in Trailside Museum that likes to be handled and fed mealworms. They do not get in women's hair. They do not distribute our kind of bed bugs. They are not blind; even in daytime they see fairly well. But they can fly through timber or the narrow twisting passages of caves in total darkness because they have radar, Bats have large specialized ears, Their squeak is pitched so high that few people can hear it, As they fly they also make a supersonic squeak about 30 times per second and are guided by the echoes bouncing back from obstacles.

22

Top 9 Things You Didn't Know About America's Power Grid | Department of  

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

9 Things You Didn't Know About America's Power Grid 9 Things You Didn't Know About America's Power Grid Top 9 Things You Didn't Know About America's Power Grid September 20, 2013 - 12:30pm Addthis Electrical transmission lines cross a snow-covered field in Dallas Dam, Oregon. | Energy Department photo. Electrical transmission lines cross a snow-covered field in Dallas Dam, Oregon. | Energy Department photo. Erin R. Pierce Erin R. Pierce Digital Communications Specialist, Office of Public Affairs More Top Things: This article is part of the Energy.gov series highlighting the "Top Things You Didn't Know About..." Be sure to check back for more entries soon. Top 9 Things You Didn't Know About America's Power Grid This article is part of the Energy.gov series highlighting the "Top Things You Didn't Know About..." Be sure to check back for more entries

23

The War of the Currents: AC vs. DC Power | Department of Energy  

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

The War of the Currents: AC vs. DC Power The War of the Currents: AC vs. DC Power The War of the Currents: AC vs. DC Power November 20, 2013 - 3:52pm Addthis Electrical transmission lines cross a snow-covered field in Dallas Dam, Oregon. | Photo courtesy of the Energy Department Flickr page. Electrical transmission lines cross a snow-covered field in Dallas Dam, Oregon. | Photo courtesy of the Energy Department Flickr page. Allison Lantero Allison Lantero Public Affairs Specialist, Office of Public Affairs Tesla vs. Edison Are you on #TeamTesla or #TeamEdison? Vote now on our website for your favorite inventor! Submit questions for Tesla and Edison experts to answer during our live Google+ Hangout on Thursday, Nov. 21, at 12:30 p.m. EST. Read our lists of top facts about Thomas Edison and Nikola Tesla.

24

ARM - NSA Science  

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

AlaskaNSA Science AlaskaNSA Science NSA Related Links Facilities and Instruments Barrow Atqasuk ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Images Information for Guest Scientists Contacts NSA Science Scientific objectives for the NSA/AAO site are provided below: Provide the comprehensive data sets necessary to develop and test continually improved algorithms for GCMs to describe radiative transfer and cloud processes at high latitudes; Specifically focus on development of algorithms to describe: radiative transfer within both the clear and cloudy atmosphere, especially at low temperatures; physical and optical behavior of water (ice) and land surfaces, both bare and snow-covered, especially during transitions from winter to summer and back; physical and optical behavior of ice and mixed phase clouds.

25

Recovery Act | Department of Energy  

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

September 24, 2013 September 24, 2013 Carbon fiber material produced at SGL Automotive Carbon Fibers in Moses Lake, Wash. (Photo courtesy of SGL Automotive Carbon Fibers) Electric Car Featuring High-Tech Material Made in the USA Makes Its Debut One of the world's first electric vehicles built using ultra lightweight carbon fiber material manufactured in the U.S. was recently unveiled. September 20, 2013 Electrical transmission lines cross a snow-covered field in Dallas Dam, Oregon. | Energy Department photo. Top 9 Things You Didn't Know About America's Power Grid Ever wonder how electricity gets to your home? Test your knowledge with these top power grid facts. September 16, 2013 Cumulative Federal Payments to OE Recovery Act Recipients, through August 31, 2013 Graph of cumulative Federal Payments to OE Recovery Act Recipients, through

26

Clean Cities: Clean Cities National Parks Initiative  

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

National Parks Initiative National Parks Initiative Submit a Project, National Park Service logo Clean Cities partners with the National Park Service (NPS) through the Clean Cities National Parks Initiative to support transportation projects that educate park visitors on the benefits of reducing petroleum use and greenhouse gas emissions. This initiative complements the NPS Climate Friendly Parks program by demonstrating the environmental benefits of reducing petroleum use. Glacier Greater Yellowstone Area Rocky Mountain Denali National Mall and Memorial Park Mississippi River Sleeping Bear Dunes Yellowstone Grand Teton Mammoth Cave Zion Blue Ridge Parkway Great Smoky Mountains Shenandoah Acadia San Antonio Missions Grand Canyon Golden Gate Mesa Verde Project Locations - Photo of the snow-covered Teton Mountain range in Grand Teton National Park.

27

CDIAC Snow Data Sets  

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

Snowfall and Snow Depth Snowfall and Snow Depth CDIAC Climate Holdings Containing Snow Data Data Set Name Investigators Data Type/Format Period of Record United States Historical Climatology Network M. Menne et al. Station data; daily snowfall and snow depth Varies by station; through 2010 Daily Snow Depth Measurements from 195 Stations in the United States (CDIAC NDP-059) D. Easterling et al. Station data; daily snow depth Varies by station; max. period is 1893-1992 Six- and Three-Hourly Meteorological Observations from 223 Former U.S.S.R. Stations (CDIAC NDP-048) V. Razuvaev et al. Station data; 6- and 3-hourly state of any snowcover on ground; occurrance of snowfall in past and present weather observations Varies by station; through 2000 Two Long-Term Instrumental Climatic Data Bases of the People's Republic of China

28

OE Recovery Act Blog | Department of Energy  

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

Recovery Recovery Act Blog OE Recovery Act Blog RSS September 20, 2013 Electrical transmission lines cross a snow-covered field in Dallas Dam, Oregon. | Energy Department photo. Top 9 Things You Didn't Know About America's Power Grid Ever wonder how electricity gets to your home? Test your knowledge with these top power grid facts. July 11, 2013 Demand Response: Lessons Learned with an Eye to the Future Under the Recovery Act, the Energy Department awarded $3.5 billion in funds to the electricity industry, including OG&E, to help catalyze the adoption of smart grid tools, technologies and techniques such as demand response that are designed to increase the electric grid's flexibility, reliability, efficiency, affordability, and resiliency. Understanding lessons learned from these projects is vital.

29

Sensitivity studies on the impacts of Tibetan Plateau snowpack pollution on the Asian hydrological cycle and monsoon climate  

SciTech Connect

The Tibetan Plateau (TP), the highest and largest plateau in the world, has long been identified to be critical in regulating the Asian monsoon climate and hydrological cycle. The snowpack and glaciers over the TP provide fresh water to billions of people in Asian countries, but the TP glaciers have been retreating extensively at a speed faster than any other part of the world. In this study a series of experiments with a global climate model are designed to simulate black carbon (BC) and dust in snow and their radiative forcing and to assess the relative impacts of anthropogenic CO2 and carbonaceous particles in the atmosphere and snow, respectively, on the snowpack over the TP, as well as their subsequent impacts on the Asian monsoon climate and hydrological cycle. Results show a large BC content in snow over the TP, especially the southern slope, with concentration larger than 100 µk/kg. Because of the high aerosol content in snow and large incident solar radiation in the low latitude and high elevation, the TP exhibits the largest surface radiative forcing induced by aerosols (e.g. BC, Dust) in snow compared to other snow-covered regions in the world. The aerosol-induced snow albedo perturbations generate surface radiative forcing of 5-25 W m-2 during spring, with a maximum in April or May. BC-in-snow increases the surface air temperature by around 1.0oC averaged over the TP and reduces snowpack over the TP more than that induced by pre-industrial to present CO2 increase and carbonaceous particles in the atmosphere during spring. As a result, runoff increases during late winter and early spring but decreases during late spring and early summer (i.e. a trend toward earlier melt dates). The snowmelt efficacy, defined as the snowpack reduction per unit degree of warming induced by the forcing agent, is 1-4 times larger for BC-in-snow than CO2 increase during April-July, indicating that BC-in-snow more efficiently accelerates snowmelt because the increased net solar radiation induced by reduced albedo melts the snow more efficiently than snow melt due to warming in the air. The TP also influences the South (SAM) and East (EAM) Asian monsoon through its dynamical and thermal forcing. During boreal spring, aerosols are transported by the southwesterly and reach the higher altitude and/or deposited in the snowpack over the TP. While BC and OM in the atmosphere directly absorb sunlight and warm the air, the darkened snow surface polluted by BC absorbs more solar radiation and increases the skin temperature, which warms the air above by the increased sensible heat flux over the TP. Both effects enhance the upward motion of air and spur deep convection along the TP during pre-monsoon season, resulting in earlier onset of the SAM and increase of moisture, cloudiness and convective precipitation over northern India. BC-in-snow has a more significant impact on the EAM in July than CO2 increase and carbonaceous particles in the atmosphere. Contributed by the significant increase of both sensible heat flux associated with the warm skin temperature and latent heat flux associated with increased soil moisture with long memory, the role of the TP as a heat pump is elevated from spring through summer as the land-sea thermal contrast increases to strengthen the EAM. As a result, both southern China and northern China become wetter, but central China (i.e. Yangtze River Basin) becomes drier - a near zonal anomaly pattern that is consistent with the dominant mode of precipitation variability in East Asia. ?

Qian, Yun; Flanner, M. G.; Leung, Lai-Yung R.; Wang, Weiguo

2011-03-02T23:59:59.000Z