摘要
在分析了中国西部SMMR积雪深度与积雪面积观测存在某些问题的基础上,通过与地面气象台站积雪深度观测记录,DMSP和NCAA卫星遥感积雪观测结果的详细对比,阐明了中国西部SMMR积雪观测结果的误差。对NASA雪深转换公式进行了大气厚度订正和积雪面积修正。订正后的SMMR积雪资料精度显著提高,具备准确表现中国西部积雪年内分配与年际变化的能力。
Baced on analysis of inaccuracies and limits for use of SMMR snow products in western China, and by comparisons of world snow maps produced by NASA employing data from SMMR with DMSP imagery, NOAA snow charts, and station data, a regional snow parameter retrieval algorithm was developed to replace the current single hemispheric algorithm, and to account for the effect of the atmospheric conditions as well as snow area adjustment in western China. This resulted in improved snow depth and snow cover area estimates in western China when compared with meteorological station data and DMSP snow charts. The adjusted SMMR snow data have ability to monitor annual cycle and year-to-year fluctuation of snow cover over the Tibetan Plateau.
出处
《冰川冻土》
CSCD
北大核心
1992年第4期366-374,共9页
Journal of Glaciology and Geocryology
基金
中美1989-1990年国家自然科学基金合作项目研究总结的一部分
编号分别为4880019和87-13878
关键词
积雪
图
深度
面积
中国
西部
passive microwave remote sensing of snow, comparison of snow cover datasets, effect of atmospheric conditions, snow-depth retrieval algorithm adjustment
