Dynamics and Transport in the Tropospheric Equatorial Westerly Ducts

对流层赤道西风管的动力学和传输

• 批准号: 0094971
• 负责人: Darryn Waugh
• 金额: $ 26.71万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-04-01 至 2005-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0094971&HistoricalAwards=false
• 关键词: Dynamics; Transport; Tropospheric; Equatorial; Westerly; Dynamics; Transport; Tropospheric; Equatorial; Westerly

The project will investigate the dynamical interactions and tracer transports between the tropics and midlatitudes, especially during Northern winter. The equatorial upper troposphere is occupied by a belt of easterlies during much of the year, except winter, when westerly winds are present over the central/eastern oceans. The easterlies are an effective barrier for equatorward propagating stationary Rossby waves, and the wintertime "westerly duct" thus presents an opening that allows vigorous tropical-extratropical interaction. Dr. Waugh will conduct a dynamically oriented analysis of meteorological fields and water vapor observations to understand how tropical-extratropical interactions through this conduit impact tropical convection, and the upper tropospheric distribution of water vapor (a major component in global warming), ozone, and trace gases. These trace substances exert a profound control on the earth's climate, directly through radiative impacts, and indirectly, through the altered balanced circulation. Dr. Waugh will use a range of dynamical and transport models to provide context for his observational findings.

该项目将调查热带和中间地区之间的动态相互作用和示踪剂运输，尤其是在北部冬季。在一年中的大部分时间里，赤道上对流层占据了一群伊斯特里，除了冬季，当时中海中/东海洋上有西风。伊斯特利是赤道传播固定的罗斯比波的有效障碍，因此冬季“西风管”因此带来了一个开口，可以允许剧烈的热带热带相互作用。 Waugh博士将对气象场和水蒸气观测进行动态定向分析，以了解如何通过该导管通过该导管影响热带对流的热带 - 散发性相互作用，以及水蒸气的上流层分布（全球变暖中的主要成分），臭氧和微量气体。这些痕量物质通过改变的平衡循环，直接通过辐射影响，并间接地对地球的气候产生深远的控制。沃博士将使用一系列动力和运输模型为其观察结果提供背景。