A Study of Multiple Environmental Influences on the Lightning of a Continental Cumulonimbus Cloud Simulated by a Numerical Model

数值模型模拟的多重环境对大陆积雨云闪电的影响研究

• 批准号: 0852620
• 负责人: Barry Lienert
• 金额: $ 26.72万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-15 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0852620&HistoricalAwards=false
• 关键词: Study; Multiple; Environmental; Influences; Lightning

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Environmental factors controlling thunderstorm updraft speed, including instability and height of cloud-base, may prevail in determining much of the pattern in global occurrence of lightning. Nevertheless, additional influences from aerosol are likely. The goal of this 3-year project is to evaluate the influence of convective instability, height of cloud-base, vertical shear of the wind, and aerosols, on the lightning produced by a single continental cumulonimbus cloud observed in the Severe Thunderstorm Electrification and Precipitation Study (STEPS). An already-developed 3D cloud-resolving model will be extended to include an electrification component for use in simulating this storm. Observational data from STEPS will validate the model's predictions of cloud properties and lightning for the simulated cloud. Responses of storm electrification to variation in these environmental factors will be analyzed by simulating this single cloud multiple times with varying environmental conditions.Improved understanding of the physics of convective storms will help the scientific community to better model and forecast storms. In the future, remote monitoring of lightning will be an ever more useful source of information for inferring convective intensity, precipitation, hail, and climate change. Codes developed will be made available to the community of users of the Weather, Research and Forecasting (WRF) model and to researchers at other institutions. Broad dissemination of results will benefit the wider educational community. Outreach to community colleges and public institutions (e.g. libraries) in Hawaii will include public talks. Highlights from the research will be outlined on a web-page, and included in lectures by the PI at the University of Hawaii, benefitting students. This project will provide training in cloud physics for a post-doctoral scientist and facilitate entry into a scientific career.

该奖项是根据2009年《美国回收和再投资法》（公法111-5）进行的。控制雷暴上升速度的环境因素，包括云基群的不稳定性和高度，在确定全球闪电发生的许多模式方面可能占上风。然而，可能会产生其他气溶胶的影响。 这个为期三年的项目的目的是评估对流不稳定性，云基碱的高度，风的垂直剪切和气溶胶对在严重的雷暴静脉曲张和降水研究中观察到的单个大陆cullonimbus云产生的闪电的影响。 已经开发的3D云分辨模型将扩展到包括用于模拟这场风暴的电气化组件。 来自步骤的观察数据将验证模型对云属性的预测和模拟云的闪电。 风暴电气化对这些环境因素变化的响应将通过多次模拟这种单一云的环境条件来分析。对对流风暴物理的理解将有助于科学界有助于科学界更好地模型和预测风暴。将来，远程监视闪电将是推断对流强度，降水，冰雹和气候变化的越来越有用的信息来源。开发的代码将提供给天气，研究和预测（WRF）模型的用户社区以及其他机构的研究人员。对结果的广泛传播将使更广泛的教育社区受益。向夏威夷的社区学院和公共机构（例如图书馆）推广将包括公开谈判。 该研究的亮点将在网页页面上概述，并在夏威夷大学的PI讲座中包括在内，从而使学生受益。该项目将为博士后科学家提供云物理学的培训，并促进进入科学职业。