重力波对青藏高原臭氧谷双心结构的影响

近年来青藏高原上空的臭氧谷被发现存在上、下两个中心的双心结构，其中下方的上对流层-下平流层(UTLS)区域臭氧低值中心的形成机制已基本形成共识，与该区域的反气旋环流和对流层顶抬升密切相关。而上方的上平流层臭氧低值中心的形成机制有待进一步讨论。青藏高原作为大气重力波的重要源地，也是全球平流层-对流层交换(STE)的关键区域，从重力波的角度出发探讨青藏高原臭氧谷双心结构成因的相关工作比较罕见。本项目拟利用多源卫星资料提取青藏高原上空臭氧谷双心区域（UTLS和上平流层区域）的重力波特征。进一步采用数值模拟和统计分析的方法，探究青藏高原臭氧双心结构对青藏高原重力波传播和破碎过程的响应机理，包括动力过程和细节特征等，为青藏高原臭氧谷双心结构的形成机制提供新的研究思路。

In recent years, the ozone valleys over the Tibetan Plateau have been found to have a double-core structure. Basic consensus has been reached on the formation mechanism of the ozone depletion center over the Tibetan Plateau in the Upper Troposphere/Lower Stratosphere (UTLS), which is found to be closely related to the anticyclone circulation and troposphere uplift in the UTLS. However, the formation mechanism of the ozone depletion center in the upper stratosphere needs further investigation. Tibetan Plateau is an important source of atmospheric gravity waves and a key area for Stratosphere and Troposphere Exchange (STE). It is relatively rare to explore the cause of the double-core structure of the ozone valley over the Tibetan Plateau from the perspective of gravity waves. By using the different satellite datasets, this project will examine the gravity wave characteristics near the double-core region (UTLS and upper stratosphere) of the ozone valley over the Tibetan Plateau. Numerical model and statistical analysis methods will be employed to reveal the response mechanism of double-core structure of the ozone valley over the Tibetan Plateau to the gravity wave propagation and fragmentation process, including dynamic processes and detailed features. The results could provide new perspectives to the formation mechanism of the double-core structure of the ozone valley over the Tibetan Plateau.