Validation and Assessment of Cloud Obscuration Reduction of Snow Cover Products in Arid Areas in China
Cloud coverage in daily snow cover products is a main obstacle in using Moderate Resolution Imaging Spectroradiometer（MODIS）.In this study,the multi-temporal and multi-sensor combination approaches are applied to reduce cloud obscuration with Aqua Advanced Microwave Scanning Radiometer for NASA＇S Earth Observing System（AMSR-E） snow depth products introduced as the auxiliary data to develop 6 new kinds of snow cover products.Different snow cover duration days（SCD） maps are developed from these combined products.The results are as follows：（1） MODIS and AMSR-E 4-day threshold-combined snow cover product performed well in algorithm efficiency,cloud-reducing effect and capability in maintaining relatively high spatiotemporal resolutions;（2） Under all weather conditions,the overall,snow and land accuracies of the resulted cloud-free products were 96%,80% and 99%,and they were significantly higher than 64%,32% and 70% of the original MODIS Terra and Aqua combination product,respectively;（3） The SCD map generated from this product could not only maintain a high spatial resolution of the original MODIS product,but also could precisely reflect the spatial distribution of the snow cover status in the study area.
国家科技期刊平台
NSTL
万方数据
维普
