利用卫星大气成分资料分析夏季亚洲季风区平流层-对流层输送特征

Characteristics of Troposphere-Stratosphere Transports over Asian Monsoon Region in Summer Based on Aura-MLS Data

首先利用臭氧探空资料验证了Aura-MLS卫星反演臭氧产品在青藏高原地区的可信度,然后基于2005年和2006年夏季的数据产品确定了亚洲季风区夏季对流层向平流层的输送通道。结果表明,青藏高原及其周边区域上对流层-下平流层(UT/LS)中,一氧化碳(CO)和臭氧(O3)浓度散点分布大体上呈现出典型的"L"型分布,夏季季节内变化反相关特征表现最明显的高度位于150 hPa附近。从时间变化上看,7月份相关系数最大,说明该月份对流层-平流层物质交换最为强烈。100 hPa高度位于对流层顶高度以上,具有对流层特性的大气主要分布在青藏高原东南侧、孟加拉湾、印度半岛、阿拉伯海以及阿拉伯半岛等区域上空,说明该区域可能是亚洲季风区夏季对流层向平流层物质输送的一个主要通道。

Firstly,by comparison with the ozone（O3） sonder profile,the Aura microwave limb sounder（Aura-MLS） O3 observation data in the upper troposphere and lower stratosphere were validated.Then based on the Aura-MLS data of 2005 and 2006,the mainly transport channel from troposphere to stratosphere over Asian monsoon region in boreal summer is analyzed.The results show that the concentration of carbon monoxide（CO） and O3 variations have obvious characteristic of inverse correlation in the upper troposphere and lower stratosphere over Asian monsoon region.The distribution of scatter of CO and O3 appears with a ＇L＇ shape.On 100 hPa the air with the characteristic of tropospheric atmosphere is mainly localized over the Southern Asian monsoon region,including south of the Tibetan Plateau,Bay of Bengal,Indian Peninsula,Arabian ocean and Arabian Peninsula areas,which composite the main transport channel from troposphere to stratosphere over Asian monsoon region in summer.