干旱区生态环境知识资源中心(Arid): 中国干旱区积雪面积产品去云处理方法验证与评估

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	中国干旱区积雪面积产品去云处理方法验证与评估
其他题名	Validation and Assessment of Cloud Obscuration Reduction of Snow Cover Products in Arid Areas in China
	王增艳; 车涛
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2012
卷号	29 期号:2 页码:312-319
中文摘要	针对MODIS每日积雪产品中云覆盖现象严重这一问题,以中国干旱区作为研究对象,结合AMSR-E被动微波雪深数据,采用多时相、多传感器数据融合的方法进行去云处理,获取MODIS每日,4 d,8 d和MODIS与AM-SR-E融合后的每日,4 d与8 d共6种新的积雪产品,并分别提取其积雪持续日数(SCD)。对比结果显示,MODIS与AMSR-E多传感器的阈值法4日融合产品在融合算法效率、云去除效果和融合后保持较高分类精度方面均有较好表现,其融合后的无云产品在全天气条件下具有96%的整体分类精度、80%的雪分类精度和99%的陆地分类精度,大大高于研究区原MODIS Terra-Aqua每日融合积雪产品全天候条件下64%,32%和70%的整体、雪、陆分类精度;并且由其提取的积雪持续日数不仅在最大程度上保持了原MODIS产品高的空间分辨率,而且精度较高,对研究区积雪的空间分布状况有很好反映。
英文摘要	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 NASAS 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.
中文关键词	积雪面积 ; 产品 ; 持续日数(SCD) ; 空间分辨率 ; 去云处理 ; 干旱区 ; 中国
英文关键词	MODIS snow covers product SCD MODIS spatial resolution cloud obscuration reduction arid area China
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:4493977
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228031
作者单位	中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	王增艳,车涛. 中国干旱区积雪面积产品去云处理方法验证与评估[J]. 中国科学院西北生态环境资源研究院,2012,29(2):312-319.
APA	王增艳,&车涛.(2012).中国干旱区积雪面积产品去云处理方法验证与评估.干旱区研究,29(2),312-319.
MLA	王增艳,et al."中国干旱区积雪面积产品去云处理方法验证与评估".干旱区研究 29.2(2012):312-319.