Time-space continuity of daily maps of fractional snow cover and albedo from MODIS

被引:168
作者
Dozier, Jeff [1 ]
Painter, Thomas H. [2 ]
Rittger, Karl [1 ]
Frew, James E. [1 ]
机构
[1] Univ Calif Santa Barbara, Donald Bren Sch Environm Sci & Management, Santa Barbara, CA 93106 USA
[2] Univ Utah, Dept Geog, Salt Lake City, UT 84112 USA
基金
美国国家科学基金会;
关键词
Snow; MODIS; Albedo; Remote sensing;
D O I
10.1016/j.advwatres.2008.08.011
中图分类号
TV21 [水资源调查与水利规划];
学科分类号
081501 ;
摘要
Using reflectance values from the seven MODIS "land" bands with 250 or 500 m resolution, along with a corresponding cloud product, we estimate the fraction of each 500 m pixel that snow covers, along with the albedo of that snow. The daily products have data gaps and errors because of cloud cover and sensor viewing geometry. Rather than make users interpolate and filter these patchy daily maps without completely understanding the retrieval algorithm and instrument properties, we use the daily time series to improve the estimate of the measured snow properties for a particular day. We use a combination of noise filtering, snow/cloud discrimination, and interpolation and smoothing to produce our best estimate of the daily snow cover and albedo. We consider two modes: one is the "predictive" mode, whereby we estimate the snow-covered area and albedo on that day using only the data up to that day; the other is the "retrospective" mode, whereby we reconstruct the history of the snow properties for a previous period. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1515 / 1526
页数:12
相关论文
共 46 条
[1]  
Aizen VB, 1997, J CLIMATE, V10, P1393, DOI 10.1175/1520-0442(1997)010<1393:CAHCIT>2.0.CO
[2]  
2
[3]   Assimilating remotely sensed snow observations into a macroscale hydrology model [J].
Andreadis, Konstantinos M. ;
Lettenmaier, Dennis P. .
ADVANCES IN WATER RESOURCES, 2006, 29 (06) :872-886
[4]  
BALES RC, 2006, EOS T AM GEOPHYS UNI, V87
[5]   The Quickhull algorithm for convex hulls [J].
Barber, CB ;
Dobkin, DP ;
Huhdanpaa, H .
ACM TRANSACTIONS ON MATHEMATICAL SOFTWARE, 1996, 22 (04) :469-483
[6]   Potential impacts of a warming climate on water availability in snow-dominated regions [J].
Barnett, TP ;
Adam, JC ;
Lettenmaier, DP .
NATURE, 2005, 438 (7066) :303-309
[7]  
Brubaker K, 1996, HYDROL PROCESS, V10, P1329
[8]  
Cayan DR, 2001, B AM METEOROL SOC, V82, P399, DOI 10.1175/1520-0477(2001)082<0399:CITOOS>2.3.CO
[9]  
2
[10]   Estimating the spatial distribution of snow in mountain basins using remote sensing and energy balance modeling [J].
Cline, DW ;
Bales, RC ;
Dozier, J .
WATER RESOURCES RESEARCH, 1998, 34 (05) :1275-1285