气候变化领域集成服务门户(CCPortal): Case Studies on Concentric Gravity Waves Source Using Lightning Flash Rate, Brightness Temperature and Backward Ray Tracing at São Martinho da Serra (29.44°S, 53.82°W)

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DOI	10.1029/2020JD034527
	Case Studies on Concentric Gravity Waves Source Using Lightning Flash Rate, Brightness Temperature and Backward Ray Tracing at São Martinho da Serra (29.44°S, 53.82°W)
	Nyassor P.K.; Wrasse C.M.; Gobbi D.; Paulino I.; Vadas S.L.; Naccarato K.P.; Takahashi H.; Bageston J.V.; Figueiredo C.A.O.B.; Barros D.
发表日期	2021
ISSN	2169897X
卷号	126 期号:10
英文摘要	We relate the spatial and temporal distribution of lightning flash rates and cloud top brightness temperature (CTBT) to concentric atmospheric gravity wave (CGW) events observed at the Southern Space Observatory (SSO) in São Martinho da Serra (29.44°S, 53.82°W, 488.7 m) in southern Brazil. The selected identified cases from 2017 to 2018 were observed by a hydroxyl (OH) all-sky imager. Backward ray tracing shows that the time of gravity wave excitation agrees with the highest values of lightning flash rates (indicating lightning jump) as well as the coldest brightness temperatures that indicate the time of convective overshoot. Radiosonde measurements show high convective available potential energy (CAPE), associated with a maximum updraft velocity just prior to the wave events. We find that these possible source locations correspond to the positions and times that convective plumes overshot the tropopause (seen in GOES-16 CTBT images). We also show that higher spatial lightning density (i.e., number of lightning flashes at a given longitude and latitude) agree with the overshoot locations from the GOES satellite. We also find that the overshoot times from the GOES-16 satellite agree with the times lightning jumps were observed in the lightning flash rate. Finally, we find that the periodicities in the lightning flash rate agree with the periods of the observed CGWs, which further strengthens the result that the CGWs were excited by the deep convective systems determined from backward ray tracing. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	concentric gravity wave; convective overshoot; lightning flash rate
语种	英语
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/185205
作者单位	Space Weather Division, National Institute for Space Research, São José dos Campos, SP, Brazil; Department of Physics, Federal University of Campina Grande (UFCG), Campina Grande, PB, Brazil; NorthWest Research Associates, Inc., Boulder, CO, United States; Impacts, Adaptation and Vulnerabilities Division, National Institute for Space Research, São José dos Campos, SP, Brazil; Southern Space Coordination, National Institute for Space Research, Santa Maria, RS, Brazil
推荐引用方式 GB/T 7714	Nyassor P.K.,Wrasse C.M.,Gobbi D.,et al. Case Studies on Concentric Gravity Waves Source Using Lightning Flash Rate, Brightness Temperature and Backward Ray Tracing at São Martinho da Serra (29.44°S, 53.82°W)[J],2021,126(10).
APA	Nyassor P.K..,Wrasse C.M..,Gobbi D..,Paulino I..,Vadas S.L..,...&Barros D..(2021).Case Studies on Concentric Gravity Waves Source Using Lightning Flash Rate, Brightness Temperature and Backward Ray Tracing at São Martinho da Serra (29.44°S, 53.82°W).Journal of Geophysical Research: Atmospheres,126(10).
MLA	Nyassor P.K.,et al."Case Studies on Concentric Gravity Waves Source Using Lightning Flash Rate, Brightness Temperature and Backward Ray Tracing at São Martinho da Serra (29.44°S, 53.82°W)".Journal of Geophysical Research: Atmospheres 126.10(2021).