Title :
Evaluating snow depth in Western China based on passive microwave remote sensing
Author :
Yin, Xiaojun ; Shi, J. ; Du, Jinyang ; Lingmei, Jiang
Author_Institution :
Inst. of Remote Sensing Applic., Chinese Acad. of Sci., Beijing, China
Abstract :
In order to evaluate the accuracy of snow water equivalent (SWE) inversion algorithm for passive microwave sensor Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E) in Western China, we compared SWE got from AMSR-E daily SWE product with the ground measurements from 15 meteorological stations in Tibetan plateau. The results show AMSR-E overestimate SWE in this regions and the RMSE is 21mm Tibetan plateau. Through incorporating snow fraction factor, a new empirical algorithm estimate snow depth and SWE have been developed in Tibet. This new algorithm appeared higher accuracy than AMSR-E. Due to complex topography, shallow patchy snow and frozen grounds covered at the Tibetan Plateau, this technique didn´t show good results. In future we will focus on how to evaluate and eliminate the effects of these factors quantitatively on SWE retrieval.
Keywords :
geophysical techniques; radiometry; remote sensing by radar; snow; topography (Earth); AMSR-E; Advanced Microwave Scanning Radiometer-Earth Observing System; SWE retrieval; Tibetan plateau; Western China; meteorological stations; passive microwave remote sensing; shallow patchy snow; snow depth; snow fraction factor; snow water equivalent inversion algorithm; topography; Land surface; Meteorology; Microwave measurements; Microwave radiometry; Microwave sensors; Optical sensors; Passive microwave remote sensing; Snow; Surface topography; Water storage; AMSR-E; Passive microwave remote sensing; Snow Water Equivalent (SWE); Snow depth; Tibetan Plateau;
Conference_Titel :
Geoscience and Remote Sensing Symposium,2009 IEEE International,IGARSS 2009
Conference_Location :
Cape Town
Print_ISBN :
978-1-4244-3394-0
Electronic_ISBN :
978-1-4244-3395-7
DOI :
10.1109/IGARSS.2009.5418162
