No evidence of widespread decline of snow cover on the Tibetan Plateau over 2000-2015 

作者:Wang, XY (Wang, Xiaoyue)[ 1,2 ] ; Wu, CY (Wu, Chaoyang)[ 2,3 ] ; Wang, HJ (Wang, Huanjiong)[ 3 ] ; Gonsamo, A (Gonsamo, Alemu)[ 4 ] ; Liu, ZJ (Liu, Zhengjia)[ 3 ]  

卷: 7 

文献号: 14645 

DOI: 10.1038/s41598-017-15208-9 

出版年: NOV 7 2017 

摘要

Understanding the changes in snow cover is essential for biological and hydrological processes in the Tibetan Plateau (TP) and its surrounding areas. However, the changes in snow cover phenology over the TP have not been well documented. Using Moderate Resolution Imaging Spectroradiometer (MODIS) daily snow products and the Interactive Multi-sensor Snow and Ice Mapping System (IMS) data, we reported daily cloud-free snow cover product over the Tibetan Plateau (TP) for 2000-2015. Snow cover start (SCS), melt (SCM) and duration (SCD) dates were calculated for each hydrological year, and their spatial and temporal variations were analyzed with elevation variations. Our results show no widespread decline in snow cover over the past fifteen years and the trends of snow cover phenology over the TP has high spatial heterogeneity. Later SCS, earlier SCM, and thus decreased SCD mainly occurred in the areas with elevation below 3500 m a.s.l., while regions in central and southwestern edges of the TP showed advanced SCS, delayed SCM and consequently longer SCD. The roles of temperature and precipitation on snow cover penology varied in different elevation zones, and the impact of both temperature and precipitation strengthened as elevation increases.

通讯作者地址: Wu, CY (通讯作者)

 Univ Chinese Acad Sci, Beijing 100049, Peoples R China.

通讯作者地址: Wu, CY; Wang, HJ (通讯作者)

 Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China.

 [ 1 ] Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China

 [ 2 ] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

 [ 3 ] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China

 [ 4 ] Univ Toronto, Dept Geog & Planning, 100 St George St, Toronto, ON M5S 3G3, Canada