Factors Controlling the Structure and Distribution of Precipitation in Hurricanes

控制飓风降水结构和分布的因素

• 批准号: 9908944
• 负责人: Shuyi Chen
• 金额: $ 19.92万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-10-01 至 2003-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9908944&HistoricalAwards=false
• 关键词: Factors; Controlling; Structure; Distribution; Precipitation

Under the U.S. Weather Research Program, the Principal Investigators will investigate the physical controls of precipitation in hurricanes. The main objective of this research is, through numerical simulations using a nested-grid, high-resolution atmospheric mesoscale model, to examine the physical processes governing the structure and distribution of cumulus convection and precipitation associated with tropical cyclones. Hurricane prediction models must accurately simulate these features in order to improve intensity and track forecasts as well as the rainfall forecast at landfall. The research will address the following specific scientific questions:What are the fundamental physical processes that determine the precipitation distribution and rain rate within a hurricane?What are the sensitivities of simulated moist convective processes to model resolution, physical parameterization, and model initialization?How are storm-scale variabilities in the precipitation and convective heating distributions related to various aspects of hurricane structure, storm-environmental interactions and, ultimately, hurricane track and intensity forecasts?The project will produce comprehensive data sets of the three-dimensional precipitation structure and distribution of Hurricanes Bonnie and Georges. It will also adapt a high-resolution nested-grid modeling system (the PSU/NCAR MM5 with an initialization specifically developed for hurricane simulations) that can be used to address issues related to both hurricane research and operational forecasting.

根据美国天气研究计划，主要研究人员将研究飓风降水的物理控制。 这项研究的主要目的是，通过使用嵌套网格高分辨率大气中尺度模型的数值模拟，研究控制与热带气旋相关的积云对流和降水的结构和分布的物理过程。 飓风预测模型必须准确模拟这些特征，以改进强度和路径预测以及登陆时的降雨量预测。 该研究将解决以下具体科学问题：决定飓风内降水分布和降雨率的基本物理过程是什么？模拟湿对流过程对模型分辨率、物理参数化和模型初始化的敏感性是什么？降水和对流加热分布的风暴规模变化与飓风结构、风暴与环境相互作用以及最终的飓风路径和强度的各个方面有何关系？ 预测？该项目将产生飓风邦尼和乔治的三维降水结构和分布的综合数据集。 它还将采用高分辨率嵌套网格建模系统（PSU/NCAR MM5，具有专门为飓风模拟开发的初始化），可用于解决与飓风研究和业务预测相关的问题。