Influence of the Tibetan High Outflow on the Southern Hemisphere Column Ozone Distribution

这项研究涉及南半球的大气动力学和臭氧输送。一种新的假说正在研究中，该假说可以解释围绕着南极臭氧层空洞的臭氧最大值的准稳定波数1模式。这种所谓的“臭氧羊角面包”从5月持续到11月，并显示出对以澳大利亚南部为中心的拉长极大值的经向偏好。这里的假设是，这一特征的经向分布受青藏高压向东南进入赤道印度洋和南半球副热带西风急流的外流控制。对这一假设的评估包括观察和建模两个部分。气象特征的结构和时间演变将被记录下来，威斯康星大学的非静力模拟系统将用于以3维臭氧层场初始化的传输研究。该项目有可能改善对南半球臭氧可变性的了解。因此，它对重要的环境政策决策具有影响。

This research deals with atmospheric dynamics and ozone transport in the southern hemisphere. A new hypothesis to explain the quasi-stationary wavenumber 1 pattern of the ozone maximum that surrounds the Antarctic ozone hole is being studied. This so-called "ozone croissant" lasts from May to November and exhibits a longitudinal preference for an elongated maximum centered south of Australia. The hypothesis here is that the longitudinal distribution of this feature is controlled by the outflow from the Tibetan high southeastward into the equatorial Indian Ocean and into the southern hemisphere subtropical westerly jet. The evaluation of this hypothesis has an observational and a modeling component. The structure and time evolution of the meteorological features will be documented and the University of Wisconsin Non-Hydrostatic Modeling System will be used for transport studies initialized with 3-dimensional ozone fields.This project has the potential to improve knowledge of ozone variability in the Southern Hemisphere. It thus has implications for important environmental policy decisions.