Numerical Studies of Thunderstorm Electrification, Maxwell Currents, and Lightning

雷暴起电、麦克斯韦电流和闪电的数值研究

• 批准号: 0303535
• 负责人: John Helsdon
• 金额: $ 39.4万
• 依托单位: South Dakota School of Mines and Technology
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-04-01 至 2007-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0303535&HistoricalAwards=false
• 关键词: Numerical; Studies; Thunderstorm; Electrification; Maxwell

This project continues the research initiated earlier on the numerical modeling of clouds including parameterizations for electrical charging, charge separation, and lightning. It includes the analysis of cloud electrical and microphysical data collected by the storm-penetrating T-28 aircraft during the STEPS program (Severe Thunderstorm Electrification and Precipitation Study) conducted in Kansas in the early summer of 2000. The existing cloud model will be improved by addition of a more accurate treatment of microphysics, apart from electrical effects, and by experimenting with different parameterizations for the non-inductive charging mechanism. The model will be validated by comparison with observations of thunderstorms from STEPS and other field programs. A new objective is to compute Maxwell current vectors as part of the simulations as a way to test hypotheses that relate thunderstorm activity to the global electrical circuit. The work advances the understanding of thunderstorms by providing a comprehensive and self-consistent numerical model that enables the simulation of charging, lightning, and precipitation under different environmental conditions.

该项目继续了早期对云的数值模拟的研究，包括充电，电荷分离和闪电的参数化。 它包括云的电气和微物理数据的分析风暴穿透T-28飞机在STEPS程序（强雷暴电气化和降水研究）在2000年初夏在堪萨斯进行。 现有的云模型将通过增加更精确的微观物理处理来改进，除了电气效应，并通过试验非感应充电机制的不同参数化。 该模型将通过与STEPS和其他实地项目的雷暴观测结果进行比较来验证。 一个新的目标是计算麦克斯韦电流矢量作为模拟的一部分，作为一种方法来测试假设，雷暴活动的全球电路。 这项工作通过提供一个全面和自洽的数值模型来促进对雷暴的理解，该模型能够模拟不同环境条件下的充电，闪电和降水。