气候变化领域集成服务门户(CCPortal): Tropical TGF Paradox: A Perspective From TRMM Precipitation Radar

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DOI	10.1029/2021JD034698
	Tropical TGF Paradox: A Perspective From TRMM Precipitation Radar
	Morales Rodriguez C.A.; Montanyà J.; van der Velde O.A.; Fabró F.; Lopez J.A.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:14
英文摘要	The Terrestrial Gamma-ray Flash (TGF) to lightning ratio, computed over the three tropical chimneys, presents a paradox: African thunderstorms produce the most lightning but yield the lowest fraction of TGFs when compared to American and Southeast Asian thunderstorms. To understand the physical insights into this asymmetry, Tropical Rainfall Measuring Mission Precipitation Radar measurements are used to depict the vertical precipitation structure and infer the vertical electrical charge fraction distribution of the observed thunderstorms in the three regions and the thunderstorms during TGF occurrences detected by the AGILE, Fermi-GBM, and RHESSI sensors. Regional differences show that African thunderstorms are taller, smaller, and have a higher concentration of denser ice particles (graupel and or hail) above the freezing level in addition to having more lightning flashes per thunderstorm. The overall TGF-related thunderstorms are taller, more intense (0.5–1.5 dBZ) and present similar radar reflectivity decay with height independent of the region. The two dimensional precipitation vertical distribution diagrams indicate that TGF thunderstorms develop to a mature stage. Independent of the region, thunderstorms show a midlevel negative charge center varying from 4.6 to 8.1 km in height and an upper level positive charge center ranging from 7.4 to 14.6 km. TGF thunderstorms have thicker positive inferred charge layer and present larger vertical distances between the opposite charging layers in comparison with the overall thunderstorm population, here defined as Climatology. African TGF thunderstorms have higher fraction of positive charges near the negative layer, helping to produce more and shorter lightning discharges. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	cloud eletrification; lightning; tgf; Thunderstorms; TRMM
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/237162
作者单位	Departamento de Ciências Atmosféricas, Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, São Paulo, Brazil; Polytechnic University of Catalonia, Terrassa, Spain; Meteorological Service of Catalonia, Barcelona, Spain
推荐引用方式 GB/T 7714	Morales Rodriguez C.A.,Montanyà J.,van der Velde O.A.,et al. Tropical TGF Paradox: A Perspective From TRMM Precipitation Radar[J],2021,126(14).
APA	Morales Rodriguez C.A.,Montanyà J.,van der Velde O.A.,Fabró F.,&Lopez J.A..(2021).Tropical TGF Paradox: A Perspective From TRMM Precipitation Radar.Journal of Geophysical Research: Atmospheres,126(14).
MLA	Morales Rodriguez C.A.,et al."Tropical TGF Paradox: A Perspective From TRMM Precipitation Radar".Journal of Geophysical Research: Atmospheres 126.14(2021).