Numerical Studies of the Interaction of Mesoscale Convective Systems With the Tropical Ocean-Atmosphere Environment

中尺度对流系统与热带海洋-大气环境相互作用的数值研究

• 批准号: 9024434
• 负责人: Thomas Warner
• 金额: $ 34.8万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-09-15 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9024434&HistoricalAwards=false
• 关键词: Numerical; Studies; Interaction; Mesoscale; Convective

This project is a model-based scientific investigation with several tasks that directly support TOGA/COARE objectives. Mesoscale model development and testing will be focussed in two areas. First, the convective parameterization in the Penn State/NCAR mesoscale model will be tested for the equatorial maritime region of the TOGA COARE IOP, and modified appropriately to allow it to accurately simulate tropical convection. Secondly, an existing four-dimensional data assimilation scheme will be modified for use in the tropics so that the special field program data can be used to more effectively initialize the mesoscale model. In addition, this data-assimilation program will be evaluated as a tool for generation of gridded model- assimilated mesoscale data sets based on the TOGA COARE observations. Sensitivity studies with the mesoscale model, and analysis of the model-assimilated data sets, will then be performed to determine how tropical deep convection interacts with its large scale oceanic and atmospheric environment. This research is important because it serves as one of the studies of TOGA/COARE that links convective scale physical processes to the larger scales that impact climate variability in an especially climate sensitive region of the world, the western Pacific Ocean, the field site of TOGA COARE.

该项目是一个基于模型的科学研究，其几项任务直接支持toga/coare目标。 中尺度模型的开发和测试将集中在两个领域。 首先，将测试宾夕法尼亚州/NCAR中尺度模型中的对流参数化，以针对Toga Coare IOP的赤道海事区域进行测试，并进行了适当的修改以允许其准确模拟热带对流。 其次，将修改现有的四维数据同化方案以用于热带地区，以便可以使用特殊的现场程序数据来更有效地初始化中尺度模型。 此外，将根据Toga Coare观察结果评估此数据鉴别程序作为生成网格模型同化的中尺度数据集的工具。 然后，将对中尺度模型进行敏感性研究，并对模型类似的数据集进行分析，以确定热带深对流如何与其大规模的海洋和大气环境相互作用。 这项研究很重要，因为它是Toga/coare的研究之一，该研究将对流尺度的物理过程与较大的尺度联系起来，这些尺度会影响世界特别敏感地区的气候变化，西太平洋西太平洋（Toga Coare的现场）。