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

青藏高原大流量对南半球柱状臭氧分布的影响

• 批准号: 0342146
• 负责人: Matthew Hitchman
• 金额: $ 30.99万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-02-01 至 2007-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0342146&HistoricalAwards=false
• 关键词: Influence; Tibetan; Outflow; Southern; Hemisphere

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.

这项研究涉及南半球的大气动力学和臭氧输送。目前正在研究一种新的假设，以解释南极臭氧洞周围臭氧最大值的准静止波数1模式。这种所谓的“臭氧羊角面包”从5月持续到11月，并表现出纵向偏好的细长最大中心的澳大利亚南部。这里的假设是，这一特征的纵向分布控制的外流从青藏高原东南向进入赤道印度洋和南半球副热带西风急流。对这一假设的评价有一个观察和建模的组成部分。气象特征的结构和时间演变将被记录下来，威斯康星州大学的非流体静力学模拟系统将用于以三维臭氧场为初始的传输研究，该项目有可能提高对南半球臭氧变化的认识。因此，它对重要的环境政策决定具有影响。