Troposphere-Stratosphere Coupling Processes

对流层平流层耦合过程

• 批准号: 0225441
• 负责人: Dale Durran
• 金额: --
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-12-01 至 2007-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0225441&HistoricalAwards=false
• 关键词: Troposphere; Stratosphere; Coupling; Processes

The project will investigate the extent and impact of tropospheric-stratospheric exchange associated with convective storms. The transfer of momentum, energy, and trace constituents between the troposphere and stratosphere profoundly influences the dynamical and chemical climatology and variability of the stratosphere and upper troposphere. Dynamical interaction between the two regions can moreover influence weather in the Northern winter. Drs. Holton and Durran (Univ. of Washington, Seattle) will use a cloud-resolving numerical model to analyze gravity wave generation and propagation, resulting from orographically generated convection. The project will also advance the 3-D modeling of tropical and extratropical storms to better understand the transport of trace chemicals from the boundary layer to the upper troposphere, and across the tropopause. The PIs expect to be able to distinguish between transport resulting from transient lifting of the tropopause and that resulting from irreversible transfer across the tropopause. Improved modeling of the mechanisms and distribution of troposphere-stratosphere coupling should lead to more accurate parameterizations of momentum and chemical transports in global weather and climate models, and advance the understanding of the stratospheric general circulation, ozone chemistry, and tropospheric weather and climate.

该项目将研究与对流风暴相关的对流层 - 平流交换的程度和影响。对流层和平流层之间的动量，能量和微量成分的转移深刻影响了平流层和对流层上层的动力学和化学气候和变异性。这两个地区之间的动态互动还会影响北部冬季的天气。博士。 Holton和Durran（西雅图华盛顿大学）将使用云分辨的数值模型来分析重力波的产生和传播，这是由于地形产生的对流而产生的。该项目还将推进热带和热带风暴的3D建模，以更好地了解痕量化学物质从边界层到对流层上部以及对流层面的传输。 PI希望能够区分对流层顶的瞬时提升以及由于不可逆传递在对流层顶造成的传输。在全球天气和气候模型中，改进了对流层 - 线圈耦合的机制和分布的建模和分布，应导致动量和化学转运的更准确的参数化，并促进对平流层一般循环，臭氧化学，对流层天气和气候的理解。