Spatiotemporal patterns of snow cover retrieved from NOAA-AVHRR LTDR: a case study in the Tibetan Plateau, China  

作　　者：Siyuan Wang Hang Yin Qichun Yang Hui Yin Xiaoyue Wang Yaoyao Peng Ming Shen 

机构地区：[1]Key Laboratory of Digital Earth Science,Institute of Remote Sensing and Digital Earth,Chinese Academy of Science,Beijing,People’s Republic of China [2]Pacific Northwest National Laboratory,Richland,WA,USA

出　　处：《International Journal of Digital Earth》2017年第5期504-521,共18页国际数字地球学报（英文）

基　　金：This study was supported by the National Natural Science Foundation of China[grant number 41271426],[grant number 91547107],[grant number 41428103];National Basic Research Program of China[grant number 2011CB707100];‘1-3-5 Project’of Chinese Academy of Sciences.

摘　　要：Snow cover plays an important role in hydrological processes and seasonal water balance.Especially in the Tibetan Plateau(TP),snow cover is an important source of the Yangtze River,Yellow River and Lancang River(SRYYL),which greatly influences regional water balance.In this study,we quantified the temporal trend and spatial variation of snow cover across the TP by calibrating and developing the Advance Very High Resolution Radiometer(AVHRR)Long Term Data Record(LTDR)-derived snow cover products during 1982-2011.We also examined the relationship of snow cover with temperature and precipitation over the TP during 1982–2011.The results indicate that seasonal snow cover generally starts to accumulate from central plateau in October,while significant melting starts to occur from the southeastern plateau in May of following year.The long-term variability of snow cover is characterized by the tendency for a slight decrease in the mean snow coverage during the period of hydrological year(HY)1982–1993 and a slight increase from HY2001 to 2011,but the total snow cover area remains relatively stable over the past 30 years.The results also show that temperature plays a critical role in controlling the snow cover days.

关 键 词：Snow cover temporal-spatial variation NOAA-AVHRR LTDR Tibetan Plateau 

分 类 号：D67[政治法律—政治学]