亚洲和西太平洋季风区潜在加热对萨赫勒夏季降水的影响。

Influence of Latent Heating over the Asian and Western Pacific Monsoon Region on Sahel Summer Rainfall.

机构信息

School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China.

出版信息

Sci Rep. 2017 Aug 9;7(1):7680. doi: 10.1038/s41598-017-07971-6.

DOI:10.1038/s41598-017-07971-6

PMID:28794484

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5550481/

Abstract

There has been an interdecadal shift towards a less humid state in Sahel summer rainfall since the 1960s. The decreased Sahel summer rainfall was associated with enhanced summer latent heating over the South Asian and western Pacific summer monsoon region and anomalous zonal-vertical cell of the Asian summer monsoon circulation, indicating that the latent heating plays a significant role in the change in Sahel rainfall. The effects of the latent heating over different monsoon domains on the Sahel rainfall are investigated through several model experiments. Results show that the remote monsoon heating mainly affects Sahel rainfall by generating changes in the zonal-vertical atmospheric circulation.

摘要

自 20 世纪 60 年代以来，萨赫勒夏季降雨的湿度状态呈现出一种向低湿度状态转变的趋势。萨赫勒夏季降雨量的减少与南亚和西太平洋夏季季风区夏季潜热加热的增强以及亚洲夏季季风环流异常纬向垂直细胞有关，这表明潜热加热在萨赫勒降雨的变化中起着重要作用。通过几个模式实验研究了不同季风区潜热加热对萨赫勒降雨的影响。结果表明，远程季风加热主要通过产生纬向垂直大气环流的变化来影响萨赫勒降雨。