气候变化领域集成服务门户(CCPortal): Chemical Response of the Upper Atmosphere Due to Lightning-Induced Electron Precipitation

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DOI	10.1029/2021JD034914
	Chemical Response of the Upper Atmosphere Due to Lightning-Induced Electron Precipitation
	Xu W.; Marshall R.A.; Kero A.; Sousa A.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:17
英文摘要	Terrestrial lightning frequently serves as a loss mechanism for energetic electrons in the Van Allen radiation belts, leading to lightning-induced electron precipitation (LEP). Regardless of the specific causes, energetic electron precipitation from the radiation belts in general has a significant influence on the ozone concentration in the stratosphere and mesosphere. The atmospheric chemical effects induced by LEP have been previously investigated using subionospheric VLF measurements at Faraday station, Antarctica (65.25°S, 64.27°W, L = 2.45). However, there exist large variations in the precipitation flux, ionization production, and occurrence rate of LEP events depending on the peak current of the parent lightning discharge, as well as the season, location, and intensity of the thunderstorm activity. These uncertainties motivate us to revisit the calculation of atmospheric chemical changes produced by LEP. In this study, we combine a well-validated LEP model and first-principles atmospheric chemical simulation, and investigate three intense storms in the year of 2013, 2015, and 2017 at the magnetic latitude of 50. (Formula presented.), 32. (Formula presented.), and 35. (Formula presented.), respectively. Modeling results show that the LEP events in these storms can cumulatively drive significant changes in the (Formula presented.), (Formula presented.), and (Formula presented.) concentration in the mesosphere. These changes are as high as (Formula presented.), (Formula presented.), and (Formula presented.) at 75–85 km altitude, respectively, and comparable to the effects typically induced by other types of radiation belt electron precipitation events. Considering the high occurrence rate of thunderstorms around the globe, the long-term global chemical effects produced by LEP events need to be properly quantified. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	atmospheric chemistry; energetic electron precipitation; ionization production; lightning discharge; lightning-induced electron precipitation; ozone depletion
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237052
作者单位	Ann and H. J. Smead Department of Aerospace Engineering Sciences, University of Colorado Boulder, Boulder, CO, United States; Sodankylä Geophysical Observatory, University of Oulu, Oulu, Finland
推荐引用方式 GB/T 7714	Xu W.,Marshall R.A.,Kero A.,et al. Chemical Response of the Upper Atmosphere Due to Lightning-Induced Electron Precipitation[J],2021,126(17).
APA	Xu W.,Marshall R.A.,Kero A.,&Sousa A..(2021).Chemical Response of the Upper Atmosphere Due to Lightning-Induced Electron Precipitation.Journal of Geophysical Research: Atmospheres,126(17).
MLA	Xu W.,et al."Chemical Response of the Upper Atmosphere Due to Lightning-Induced Electron Precipitation".Journal of Geophysical Research: Atmospheres 126.17(2021).