Assimilating satellite-based snow depth and snow cover products for improving snow predictions in Alaska

被引:90
|
作者
Liu, Yuqiong [1 ,2 ]
Peters-Lidard, Christa D. [2 ]
Kumar, Sujay [1 ,3 ]
Foster, James L. [2 ]
Shaw, Michael [2 ,3 ,4 ]
Tian, Yudong [1 ,2 ]
Fall, Gregory M. [5 ]
机构
[1] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA
[2] NASA, Hydrol Sci Lab, Goddard Space Flight Ctr, Greenbelt, MD USA
[3] Sci Applicat Int Corp, Beltsville, MD USA
[4] AF Weather Agcy, Offutt, NE USA
[5] Natl Operat Hydrol Remote Sensing Ctr, Chanhassem, MN USA
关键词
Data assimilation; Satellite snow products; Snow prediction; Streamflow prediction; LAND INFORMATION-SYSTEM; ENSEMBLE KALMAN FILTER; MODEL; MODIS; FRAMEWORK; AREA;
D O I
10.1016/j.advwatres.2013.02.005
中图分类号
TV21 [水资源调查与水利规划];
学科分类号
081501 ;
摘要
Several satellite-based snow products are assimilated, both separately and jointly, into the Noah land surface model for improving snow prediction in Alaska. These include the standard and interpreted versions of snow cover fraction (SCF) data from the Moderate-Resolution Imaging Spectroradiometer (MODIS) and the snow depth (SD) estimates from the Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E). The satellite-based SD estimates are adjusted against in situ observations via statistical interpolation to reduce the potentially large biases, prior to being assimilated using an ensemble Kalman filter. A customized, rule-based direct insertion approach is developed to assimilate the two SCF datasets. Our results indicate that considerable overall improvement on snow prediction can be achieved via assimilating the bias-adjusted satellite SD estimates; however, the improvement does not always translate into improvements in streamflow prediction. Assimilating the standard MODIS SCF is found to have little impact on snow and streamflow predictions, while assimilating the interpreted SCF estimates, which have reduced cloud coverage and improved snow mapping accuracy, has resulted in the most consistent improvements on snow and streamflow predictions across the study domain. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:208 / 227
页数:20
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