大气和海洋科学快报（英文版）2018，Vol.11Issue(2)：173-179,7.
夏季青藏高原附近云顶分布和对流层顶高度的关系
Exploring the relationship between the cloud-top and tropopause height in boreal summer over the Tibetan Plateau and its adjacent region
摘要
Abstract
The distribution characteristics of cloud-top and tropopause height in the tropics and subtropics in boreal summer are analyzed based on CALIPSO data for the period 2008-2012.The maximum values of cloud-top vertical cumulative frequency above the tropopause (CTAT) are concentrated in three tropical regions:the Asian summer monsoon region,Central America,and western Africa.The contributions to the area-weighted CTAT frequency in the three regions from the Northern Hemisphere are 49.0％,13.5％,and 12.4％,respectively.Moreover,the contribution of troposphere-to-stratosphere transport (TST) in the Asian monsoon region to global TST can be far greater than 50％,according to analysis of the continuous equation,velocity potential,and divergent wind from ERA-Interim data.Furthermore,the Asian summer monsoon circulation system controls the distribution of the cloud top.On the south side of the Tibetan Plateau,the maximum frequency of the cloud top,more than 10％ per 500 m vertically,is most likely to appear in the core of the high-level easterlyjet near the tropopause height (16.5 km).Over the Tibetan Plateau,the maximum frequency of the cloud top,greater than 3％ per 500 m vertically,is suppressed below 11 km,far away from the thermodynamic tropopause height but close to the dynamic tropopause height of 2 PVU (potential vorticity units).关键词
云顶/对流层顶/对流层向平流层输送/亚洲夏季风环流/青藏高原Key words
Cloud top/tropopause/troposphere-to-stratosphere transport/Asian summer monsoon circulation/Tibetan Plateau引用本文复制引用
SHI Chun-Hua,CHANG Shu-Jie,GUO Dong,XU Jian-Jun,ZHANG Chen-Xin..夏季青藏高原附近云顶分布和对流层顶高度的关系[J].大气和海洋科学快报（英文版）,2018,11(2):173-179,7.基金项目
This work was jointly supported by National Key Research and Development Program of China [grant number 2017YFC1501802] （）
the National Natural Science Foundation of China [grant number 41375047],[grant number 91537213],and [grant number 41675039]. （）
