| 项目编号: | 1415244
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| 项目名称: | An Investigation of the Dynamic and Thermodynamic Processes that Lead to Distinctly Different Pathways to Tropical Cyclogenesis |
| 作者: | Melville Nicholls
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| 承担单位: | University of Colorado at Boulder
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| 批准年: | 2013
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| 开始日期: | 2014-08-01
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| 结束日期: | 2018-07-31
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| 资助金额: | USD366549
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| 资助来源: | US-NSF
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| 项目类别: | Continuing grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Atmospheric and Geospace Sciences
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| 英文关键词: | tropical cyclogenesis
; process
; pathway
; complex process
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| 英文摘要: | The formation of tropical storms and hurricanes, known as tropical cyclogenesis, is a complex process involving interactions between the large-scale environment and a smaller-scale atmospheric disturbance passing through. There have been multiple theories developed to try to describe the pathway that a disturbance takes on its road to becoming a tropical storm. In this project, researchers will use advanced, high-resolution numerical modeling to analyze the processes involved in two of these pathways. Improved knowledge of how tropical cyclones form will aid forecasters and improve public safety, especially in the cases where small storms develop very close to populated areas. This award will also provide a training opportunity for a graduate student.
The first pathway to tropical cyclogenesis is characterized by a spin up of cyclonic surface winds and vorticity building in the center of deep convective towers. The second is characterized by a mid-level vortex that is followed by a small surface concentrated vortex near the center of the large scale circulation. The research plan is to conduct idealized numerical experiments using the Regional Atmospheric Modeling System (RAMS) with new riming and surface flux schemes and the Weather Research and Forecasting (WRF) model with moving nested grids. The main objectives that the project will address are to: 1) Determine the physical mechanisms responsible for the development of strong mid-level vortices and the conditions that favor their occurrence, 2) Identify the processes leading to the formation of a small surface concentrated vortex, and 3) Determine the effect of vertical wind shear, including a mean flow, on the pathway taken to tropical cyclogenesis. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/96060
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Melville Nicholls. An Investigation of the Dynamic and Thermodynamic Processes that Lead to Distinctly Different Pathways to Tropical Cyclogenesis. 2013-01-01.
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