| 项目编号: | 1618457
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| 项目名称: | Balloon Observations of Gamma-ray Glows from Thunderstorms |
| 作者: | Joseph Dwyer
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| 承担单位: | University of New Hampshire
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| 批准年: | 2016
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| 开始日期: | 2016-10-01
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| 结束日期: | 2019-09-30
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| 资助金额: | 500489
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| 资助来源: | US-NSF
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| 项目类别: | Standard 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: | gamma-ray
; gamma-ray glow
; thunderstorm
; lightning
; new observation
; gamma-ray emission
; few observation
; gamma-ray sensor
; balloon-based observation
; gamma-ray propagation
; thunderstorm meteorology
; balloon-borne instrument
|
| 英文摘要: | Thunderstorms are high-energy environments consisting of electric fields and radiation sources. Gamma-ray emissions from thunderstorms are known as gamma-ray glows and are often terminated by lightning. However, there have been few observations of gamma-ray glows, and little is known about how and where they are created and how they may relate to the initiation of lightning. This project will combine new observations and computer modeling to better understand this phenomena. The main aspect of the project will be the deployment of gamma-ray sensors on balloons that will be flown into thunderstorms to collect data. A potential impact of the project is through the improved understanding of lightning initiation, which may eventually lead to better warnings and lightning safety. Multiple students would be involved in the project, thereby training the next generation of scientists.
The research team will conduct balloon-based observations of gamma-ray glows. The work will improve upon a prior design of a balloon-borne instrument that detects gamma-ray glows using Geiger counters by incorporating an inorganic scintillator and a slow electric field measurement. Thirty flights are planned over the course of the proposal period from central Florida. The data, along with Monte Carlo simulations of gamma-ray propagation, would be used to: 1) Determine the frequency of gamma-ray glows and their relationship to thunderstorm meteorology and lightning, 2) Determine source mechanism(s) for gamma-ray glows, 3) Determine discharge currents produced by gamma-ray glows in the source regions, 4) Constrain electric fields present in glow source regions/lightning initiation regions and determine durations of high fields occurring before lightning, 5) Determine relationship between glows, lightning and TGFs. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/90846
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Joseph Dwyer. Balloon Observations of Gamma-ray Glows from Thunderstorms. 2016-01-01.
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