A spatially explicit snow model in a mid-latitude = alpine basin

From: Subject: A spatially explicit snow model in a mid-latitude alpine basin Date: Sun, 22 May 2005 20:53:24 -0700 MIME-Version: 1.0 Content-Type: multipart/related; type="text/html"; boundary="----=_NextPart_000_001A_01C55F10.4BB13FB0" X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_001A_01C55F10.4BB13FB0 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Content-Location: http://www.agu.org/cgi-bin/SFgate/SFgate?language=English&verbose=0&listenv=table&application=fm04&convert=&converthl=&refinequery=&formintern=&formextern=&transquery=an%3d%22C31A-0303%22&_lines=&multiple=0&descriptor=%2fdata%2fepubs%2fwais%2findexes%2ffm04%2ffm04%7c1000%7c3376%7cA%20spatially%20explicit%20snow%20model%20in%20a%20mid-latitude%20alpine%20basin%7cHTML%7clocalhost:0%7c%2fdata%2fepubs%2fwais%2findexes%2ffm04%2ffm04%7c7615277%207618653%20%2fdata2%2fepubs%2fwais%2fdata%2ffm04%2ffm04.txt A spatially explicit snow model in a mid-latitude = alpine basin

2004 Fall=20 = Meeting
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Cite = abstracts as=20 Author(s) (2004), Title, Eos Trans. AGU,
85(47), = Fall=20 Meet. Suppl., Abstract = xxxxx-xx

Your query was:: an=3D"C31A-0303"

HR: 0800h
AN: C31A-0303
TI: A spatially = explicit snow=20 model in a mid-latitude alpine basin
AU: * Colee,=20 M
EM: mtc@bren.ucsb.edu
AF: = University of California, Bren School of Environmental = Science=20 & Management, Santa Barbara, CA 93106-5131 United States=20
AU: Dozier, J
EM: dozier@bren.ucsb.edu
AF: University of=20 California, Bren School of Environmental Science & Management, = Santa=20 Barbara, CA 93106-5131 United States
AU: Painter, T H
EM: tpainter@nsidc.org
AF: University of=20 Colorado, CIRES, Boulder, CO 80309 United States
AU: = Molotch, N H
EM: molotch@cires.colorado.edu
AF: University of Colorado, CIRES, Boulder, CO 80309 United = States=20
AB: The snowpack in an alpine basin in = the=20 Sierra Nevada is analyzed with a spatially-explicit snowmelt = model. The=20 1900 hectare basin lies almost entirely above timberline. We run = CRREL's=20 point snow model SNTHERM.89 in each spatial element of a 30 m = grid. Three=20 field campaigns during the ablation season obtained depth, = density, and=20 temperature measurements for estimating the distribution of snow = water=20 equivalent and thermal properties of the snow. Nine remotely = sensed images=20 of subpixel snow-covered area provide initialization, validation, = and=20 re-initialization. SNTHERM.89 uses grain size retrieved by remote = sensing=20 to calculate snow albedo. The initial snow water equivalent image = was=20 derived from the first gridded field survey of 429 depth and 33 = density=20 samples. We distribute meteorological data at hourly time steps = from three=20 stations within the basin to the elevation grid based on = calculated lapse=20 rates with elevation. Shortwave radiation inputs to the model are=20 calculated with a topographic radiation model and adjusted for = cloud cover=20 based on measured solar radiation. Longwave radiation inputs are=20 calculated with a model incorporating air temperature and relative = humidity, with corrections for cloud cover. We validate the = model's=20 calculation of the snow cover by comparing snow-covered area, snow = water=20 equivalent, and grain size with remote sensing data and field=20 measurements, and we also compared the model snowmelt flux with = the=20 hydrograph measured at the basin outlet. Model results are = sensitive to=20 correct estimation of albedo. Overall the model matches the = hydrograph=20 well, except it misses the very beginning of runoff in the stream. = This=20 error is perhaps caused by lateral flow within the snowpack.=20
UR: http://www.snow.ucsb.edu/=20
DE: 1863 Snow and ice = (1827)
SC: Cryosphere [C]
MN: 2004 AGU = Fall=20 Meeting

New=20 Search

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