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DOI	10.5194/acp-19-10423-2019
	Variability in vertical structure of precipitation with sea surface temperature over the Arabian Sea and the Bay of Bengal as inferred by Tropical Rainfall Measuring Mission precipitation radar measurements
	Saikranthi K.; Radhakrishna B.; Narayana Rao T.; Krishnakumari Satheesh S.
发表日期	2019
ISSN	16807316
起始页码	10423
结束页码	10432
卷号	19 期号:15
英文摘要	Tropical Rainfall Measuring Mission (TRMM) precipitation radar measurements are used to examine the variation in vertical structure of precipitation with sea surface temperature (SST) over the Arabian Sea (AS) and Bay of Bengal (BOB). The variation in reflectivity and precipitation echo top with SST is remarkable over the AS but small over the BOB. The reflectivity increases with SST (from 26 to 31 °C) by 1/41 and 4 dBZ above and below 6 km, respectively, over the AS, while its variation is <0.5 dBZ over the BOB. The transition from shallow storms at lower SSTs (≤27 °C) to deeper storms at higher SSTs is strongly associated with the decrease in stability and mid-tropospheric wind shear over the AS. In contrary, the storms are deeper at all SSTs over the BOB due to weaker stability and mid-tropospheric wind shear. At lower SSTs, the observed high aerosol optical depth (AOD) and low total column water (TCW) over AS results in the small cloud effective radius (CER) and weaker reflectivity. As SST increases, AOD decreases and TCW increases, leading to a large CER and high reflectivity. The changes in these parameters with SST are marginal over the BOB and hence the CER and reflectivity. The predominance of collision-coalescence process below the bright band is responsible for the observed negative slopes in the reflectivity over both the seas. The observed variations in reflectivity originate at the cloud formation stage over both the seas, and these variations are magnified during the descent of hydrometeors to the ground. © 2019 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	precipitation (climatology); radar; reflectivity; sea surface temperature; spatial variation; TRMM; vertical distribution; Arabian Sea; Bay of Bengal; Indian Ocean
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/144759
作者单位	Department of Earth and Climate Science, Indian Institute of Science Education and Research (IISER), Tirupati, 517507, India; National Atmospheric Research Laboratory, Department of Space, Government of India, Gadanki, 517112, India; Divecha Centre for Climate Change, Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bangalore, India
推荐引用方式 GB/T 7714	Saikranthi K.,Radhakrishna B.,Narayana Rao T.,et al. Variability in vertical structure of precipitation with sea surface temperature over the Arabian Sea and the Bay of Bengal as inferred by Tropical Rainfall Measuring Mission precipitation radar measurements[J],2019,19(15).
APA	Saikranthi K.,Radhakrishna B.,Narayana Rao T.,&Krishnakumari Satheesh S..(2019).Variability in vertical structure of precipitation with sea surface temperature over the Arabian Sea and the Bay of Bengal as inferred by Tropical Rainfall Measuring Mission precipitation radar measurements.Atmospheric Chemistry and Physics,19(15).
MLA	Saikranthi K.,et al."Variability in vertical structure of precipitation with sea surface temperature over the Arabian Sea and the Bay of Bengal as inferred by Tropical Rainfall Measuring Mission precipitation radar measurements".Atmospheric Chemistry and Physics 19.15(2019).