DOI码：10.1029/2021JD035789
发表刊物：Journal of Geophysical Research: Atmospheres
摘要：In this work, we examine the impacts of wintertime western disturbances (WDs) on precipitation over the southeastern Tibetan Plateau (SETP) during 1979–2017. Most WDs initially formed within the central Himalayas and dissipated over southeastern China and its neighboring seas. All extreme precipitation days over the SETP region during this period were linked to WDs, often when a WD center entered the region about 10° west of the SETP. Significant warm temperature anomalies over the SETP region preceding WD arrival favored moisture accumulation there. During the passage of WDs, both strong updrafts along the eastern edge of the WD and rapid decreases in temperature over the SETP (linked to WD-associated cold anomalies below 300 hPa) favored the occurrence of wintertime precipitation over the SETP region. WD strength and moist static energy variations over the SETP region were key factors affecting the intensity of WD-induced precipitation, while the size and latitudinal position of the WD played minor roles. The relatively strong WDs that produced extreme precipitation days over the SETP mainly originated above the eastern Mediterranean Sea, northern Arabian Peninsula, and Iranian Plateau. A distinct transition of the circumglobal teleconnection pattern modulated the generation of strong-intensity WDs within these major genesis regions, as well as their eastward propagation and the generation of extreme precipitation over the SETP region.
备注：Qiu, T., W. Huang, J. S. Wright, Z. Yang and B. Wang
论文类型：期刊论文
论文编号：e2021JD035789
学科门类：理学
一级学科：大气科学
卷号：127
期号：7
页面范围：e2021JD035789
是否译文：否
收录刊物：SCI
发布期刊链接：https://doi.org/10.1029/2021JD035789