Effects of Saharan Dust on African Easterly Waves and Tropical Cyclones

撒哈拉沙尘对非洲东风波和热带气旋的影响

• 批准号: 1321720
• 负责人: Shu-Hua Chen
• 金额: $ 41.32万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-07-01 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1321720&HistoricalAwards=false
• 关键词: Effects; Saharan; Dust; African; Easterly

The primary objective of this research project is to advance understanding of the effects of Saharan mineral dust on the African easterly Jet, African easterly waves, and tropical cyclones. A unified work plan is designed that combines theory, numerical experiments, data assimilation, and model verification. Standard analytical, numerical, and diagnostic methods will be used to execute the plan. A new theoretical framework will be developed whose goal is to illuminate causal relationships between Saharan dust, the African easterly jet, and African easterly waves. The theoretical framework will serve as a tool for interpreting results obtained from the Weather Research and Forecasting (WRF) model, which will be used to carry out comprehensive simulations involving dust-radiative-microphysical interactions. The intellectual merit of the research includes advancing understanding of how Saharan mineral dust operates over the synoptic scale environment to the tropical cyclone scale to affect the path and intensification of tropical cyclones. This research will assess the relative importance dust-radiation and dust-microphysical interactions on tropical cyclone activity, which will lead to improved prediction of TCs.The broader impacts of the research include model validation results with various data sets, which is critical to assessing model performance and forecasts. This award will develop a new understanding of the effects of dust on tropical cyclones, which can be used to help improve existing diagnostic and statistical tools for tropical cyclone forecasts. Additionally, this award will provide research training for both undergraduate and graduate students.

该研究项目的主要目的是提高人们对撒哈拉矿物粉尘对非洲东方喷气机，非洲东方波浪和热带气旋的影响的理解。设计了一个统一的工作计划，该计划结合了理论，数值实验，数据同化和模型验证。标准分析，数值和诊断方法将用于执行计划。将开发一个新的理论框架，其目标是阐明撒哈拉尘埃，非洲东方喷气机和非洲东方浪潮之间的因果关系。理论框架将用作解释从天气研究和预测（WRF）模型获得的结果的工具，该模型将用于进行涉及粉尘性 - 微物理相互作用的综合模拟。这项研究的智力优点包括促进对撒哈拉矿物粉尘在天气规模环境中如何运作到热带气旋量表的理解，以影响热带气旋的路径和强化。 这项研究将评估对热带气旋活动的相对重要性尘埃辐射和尘埃形成物理相互作用，这将导致对TC的预测进行改进。该研究的更广泛影响包括具有各种数据集的模型验证结果，这对于评估模型性能和预测至关重要。 该奖项将对粉尘对热带气旋的影响有了新的了解，该奖项可用于帮助改善热带旋风预测的现有诊断和统计工具。 此外，该奖项将为本科生和研究生提供研究培训。