气候变化领域集成服务门户(CCPortal): Seasonality in power law scaling of convective and stratiform rainfall with lightning intensity over Indian Monsoon regions

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DOI	10.1016/j.atmosres.2020.105265
	Seasonality in power law scaling of convective and stratiform rainfall with lightning intensity over Indian Monsoon regions
	Choudhury B.A.; Goswami B.N.; Zahan Y.; Rajesh P.V.
发表日期	2021
ISSN	0169-8095
卷号	248
英文摘要	The power law relationship between the rain (RT) and lightning flash (LF) is useful for estimating rainfall over poorly gauged catchment areas of rivers over north-east India (NEI) and that between LF and storm top height (STH) is key to lightning parametrization in models. However, they are poorly constrained over the Indian monsoon region where potential for significant changes exists with large spatial variability of rainfall, strong land-ocean contrast, seasonality and contribution of stratiform to total rainfall. Using 16 years of TRMM-PR data and LIS data, here we examine the RT and LF relationship and between LF and STH during pre-monsoon and monsoon seasons over four regions, NEI, Central India (CI), Bay of Bengal (BoB) and Indian Ocean (IO). A stronger power law (exponent b = 0.71) during pre-monsoon than that during the monsoon season (b = 0.58) apply for convective rain over land (including BoB) while a weaker relationship is applicable for stratiform rain with b = 0.60, and b = 0.47 respectively. Over IO, the relationship is nearly identical for convective and stratiform rain with no seasonality (b ~ 0.4). A power law poorly represents the LF-STH relationship over land and fails over IO. A fifth power law is applicable only for pre-monsoon convective rain over land weakening to half in monsoon seasons (b = 2.48). For stratiform rain it is weaker with (b = 3.27) and (b = 1.67) for pre-monsoon and monsoon seasons respectively. Our findings suggest that one threshold based lightning parameterizations are inadequate and need to be generalized to include regional and seasonal differences unraveled here. © 2020 Elsevier B.V.
英文关键词	Lightning Flash; Power law relation; Rainfall; Storm Top Height
语种	英语
scopus关键词	Atmospheric thermodynamics; Catchments; Lightning protection; Rain gages; Lightning flashes; Lightning intensity; North- East India; Parametrizations; Power law relationship; Power law scalings; Seasonal differences; Spatial variability; Rain; convective system; lightning; monsoon; parameterization; power law; rainfall; seasonality; storm; TRMM; Bay of Bengal; India; Indian Ocean
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141669
作者单位	Cotton University, Guwahati, 781001, India; Assam, University, Silchar, Assam 788001, India
推荐引用方式 GB/T 7714	Choudhury B.A.,Goswami B.N.,Zahan Y.,et al. Seasonality in power law scaling of convective and stratiform rainfall with lightning intensity over Indian Monsoon regions[J],2021,248.
APA	Choudhury B.A.,Goswami B.N.,Zahan Y.,&Rajesh P.V..(2021).Seasonality in power law scaling of convective and stratiform rainfall with lightning intensity over Indian Monsoon regions.Atmospheric Research,248.
MLA	Choudhury B.A.,et al."Seasonality in power law scaling of convective and stratiform rainfall with lightning intensity over Indian Monsoon regions".Atmospheric Research 248(2021).