Observed Relationship of Spring and Summer East Asian Rainfall with Winter and Spring Eurasian Snow
Observed Relationship of Spring and Summer East Asian Rainfall with Winter and Spring Eurasian Snow
复制标题
DOI：
10.1175/jcli4068.1
复制
发表时间：
2007-04
影响因子：
4.9
通讯作者：
R. Wu;B. Kirtman
中科院分区：
文献类型：
--
作者：
R. Wu;B. Kirtman
摘要本研究利用台站降水观测、卫星观测的积雪、卫星推算的雪水当量、台站观测的积雪天数和积雪深度，研究了东亚地区春季和夏季降水与欧亚大陆冬、春季积雪/积雪深度之间的关系。相关分析表明，雪深异常可以持续从冬季到春季，而积雪异常不能在欧亚大陆的大部分地区。在局地上，2月份的积雪和雪深距平在50°N以北的大部分地区没有相关性，但4月份的积雪和雪深距平具有一致的年际变化。结果表明，冬季积雪不能正确地代表所有的雪的影响，这是必要的，以解决冬季和春季积雪的雪季风关系。西伯利亚西部的春季积雪与中国南方的春季降雨呈正相关。循环异常...
Abstract This study investigates the relationship between spring and summer rainfall in East Asia and the preceding winter and spring snow cover/depth over Eurasia, using station rainfall observations, satellite-observed snow cover, satellite-derived snow water equivalent, and station observations of the number of days of snow cover and snow depth. Correlation analysis shows that snow-depth anomalies can persist from winter to spring whereas snow cover anomalies cannot in most regions of Eurasia. Locally, snow cover and snow-depth anomalies in February are not related in most regions to the north of 50°N, but those anomalies in April display consistent year-to-year variations. The results suggest that the winter snow cover cannot properly represent all the effects of snow and it is necessary to separate the winter and spring snow cover in addressing the snow–monsoon relationship. Spring snow cover in western Siberia is positively correlated with spring rainfall in southern China. The circulation anomalies...