亚洲夏季风是低层污染物进入平流层的重要途径

夏季亚洲季风区是对流层低层水汽和污染物进入全球平流层的一个重要通道, 自然或人为污染物通过该通道进入平流层后对臭氧层的破坏以及全球气候环境的影响, 成为目前国际科学界关注的热点问题。早先观点认为: 夏季青藏高原是对流层低空物质向平流层输送的一个重要渠道。然而, 越来越多的观测表明: 包括青藏高原在内的整个亚洲夏季风通过强对流的快速输送以及大尺度输送过程可以把低层大气物质输送到全球平流层。在地面物质进入平流层的过程中有两个关键过程, 一是垂直快速输送的对流活动, 这对于短寿命化学成分非常重要, 二是缓慢的大尺度反气旋输送和限制作用。但是, 目前对于亚洲季风区不同源区的贡献还有很大的争议。

Tropospheric Pollutant Transport to the Stratosphere by Asian Summer Monsoon

Asia is currently the fastest growing economy region and is also the most concentrated population area in the world, and consequently, regional and potential global climate and environment issues caused by Asian rapid economic development, become an important topic of concern in the scientific community. Originally, it was assumed that the Tibetan Plateau is a key region for the tropospheric air into the stratosphere in summer. However, recent satellite observations and numerical simulations suggested that the Asian summer monsoon is an important pathway for lower tropospheric water vapor and pollutions into the global stratosphere. These chemical mass will have important effect on the regional and global climate and environment through chemical and radiative processes in the stratosphere.