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DOI	10.5194/acp-21-4741-2021
	Statistical characteristics of raindrop size distribution over the Western Ghats of India: Wet versus dry spells of the Indian summer monsoon
	Veerendra Murali Krishna U.; Kumar Das S.; Govindaraj Sulochana E.; Bhowmik U.; Madhukar Deshpande S.; Pandithurai G.
发表日期	2021
ISSN	1680-7316
起始页码	4741
结束页码	4757
卷号	21 期号:6
英文摘要	The nature of raindrop size distribution (DSD) is analyzed for wet and dry spells of the Indian summer monsoon (ISM) in the Western Ghats (WG) region using Joss Waldvogel disdrometer (JWD) measurements during the ISM period (June September) in 2012 2015. The observed DSDs are fitted with a gamma distribution. Observations show a higher number of smaller drops in dry spells and more midsize and large drops in wet spells. The DSD spectra show distinct diurnal variation during wet and dry spells. The dry spells exhibit a strong diurnal cycle with two peaks, while the diurnal cycle is not very prominent in the wet spells. Results reveal the microphysical characteristics of warm rain during both wet and dry periods. However, the underlying dynamical parameters, such as moisture availability and vertical wind, cause the differences in DSD characteristics. The higher moisture and strong vertical winds can provide sufficient time for the raindrops to grow bigger in wet spells, whereas higher temperature may lead to evaporation and drop breakup processes in dry spells. In addition, the differences in DSD spectra with different rain rates are also observed. The DSD spectra are further analyzed by separating them into stratiform and convective rain types. Finally, an empirical relationship between the slope parameter and the shape parameter is derived by fitting the quadratic polynomial during wet and dry spells as well as for stratiform and convective types of rain. The relations obtained in this work are slightly different compared to previous studies. These differences could be related to different rain microphysics such as collision coalescence and breakup. © 2021 BMJ Publishing Group. All rights reserved.
语种	英语
scopus关键词	diurnal variation; evaporation; high temperature; monsoon; raindrop; size distribution; statistical analysis; India; Western Ghats
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247021
作者单位	Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pashan, Pune, 411008, India; College of Engineering, Guindy, Chennai, 600025, India
推荐引用方式 GB/T 7714	Veerendra Murali Krishna U.,Kumar Das S.,Govindaraj Sulochana E.,et al. Statistical characteristics of raindrop size distribution over the Western Ghats of India: Wet versus dry spells of the Indian summer monsoon[J],2021,21(6).
APA	Veerendra Murali Krishna U.,Kumar Das S.,Govindaraj Sulochana E.,Bhowmik U.,Madhukar Deshpande S.,&Pandithurai G..(2021).Statistical characteristics of raindrop size distribution over the Western Ghats of India: Wet versus dry spells of the Indian summer monsoon.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(6).
MLA	Veerendra Murali Krishna U.,et al."Statistical characteristics of raindrop size distribution over the Western Ghats of India: Wet versus dry spells of the Indian summer monsoon".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.6(2021).