GSTDTAP  > 地球科学
DOI10.1016/j.atmosres.2019.104797
Role of Cyclone "Ockhi" in the re-distribution of aerosols and its impact on the precipitation over the Arabian Sea
Nair, Arun1; Das, Siddarth S.2; Thomas, Abin1; Sarangi, Chandan3; Kanawade, Vijay P.1
2020-05-01
发表期刊ATMOSPHERIC RESEARCH
ISSN0169-8095
EISSN1873-2895
出版年2020
卷号235
文章类型Article
语种英语
国家India; USA
英文摘要

Tropical cyclone Ockhi, which matured into a very severe cyclonic storm (VSCS) in the southeast Arabian Sea, took atypical track over the Arabian Sea. Concurrently, an abrupt reduction in the precipitation rate, accompanied by weak updraft in the eye, was observed. The simultaneous presence of the capped inversion associated with the decreasing (increasing) convective available potential energy (convective inhibition) was observed after it matured into VSCS at 14:30 h local time on 1 December 2017. As cyclone Ockhi matured into VSCS, the major fraction of aerosols was pulled towards the cyclone from highly polluted Indo-Gangetic Plain. As a result, aerosol loading off the west coast and over Gujarat state during the intensifying and dissipating stages of cyclone Ockhi was found to be higher than during the mature stages, possibly due to lower wet scavenging arising from the capped inversion. Analysis of cloud microphysical properties revealed the presence of thicker convective tower clouds during the intensifying stages, associated with lower outgoing longwave radiation, while occurrence of towering high clouds reduced during mature and dissipating stages of the Cyclone Ockhi. This finding is substantiated by a narrow distribution of hydrometeors and the decreasing ice cloud effective radius with increasing altitude, which might have played a role in the reduced precipitation efficiency of cloud systems. These results have an important implication for re-distribution of aerosols and their impact on precipitation pattern under prevalent atmospheric circulation.


英文关键词Ockhi Arabian Sea Aerosol-cloud interactions Cyclogenesis
领域地球科学
收录类别SCI-E
WOS记录号WOS:000525322800026
WOS关键词INDO-GANGETIC PLAIN ; BLACK CARBON AEROSOLS ; OPTICAL DEPTH ; SOUTH-ASIA ; INTENSITY ; SATELLITE ; REANALYSIS ; MODEL ; AIR ; SIMULATIONS
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/278839
专题地球科学
作者单位1.Univ Hyderabad, Ctr Earth Ocean & Atmospher Sci, Hyderabad, Andhra Pradesh, India;
2.Vikram Sarabhai Space Ctr, Space Phys Lab, Thiruvananthapuram, Kerala, India;
3.Pacific Northwest Natl Lab, Richland, WA 99352 USA
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GB/T 7714
Nair, Arun,Das, Siddarth S.,Thomas, Abin,et al. Role of Cyclone "Ockhi" in the re-distribution of aerosols and its impact on the precipitation over the Arabian Sea[J]. ATMOSPHERIC RESEARCH,2020,235.
APA Nair, Arun,Das, Siddarth S.,Thomas, Abin,Sarangi, Chandan,&Kanawade, Vijay P..(2020).Role of Cyclone "Ockhi" in the re-distribution of aerosols and its impact on the precipitation over the Arabian Sea.ATMOSPHERIC RESEARCH,235.
MLA Nair, Arun,et al."Role of Cyclone "Ockhi" in the re-distribution of aerosols and its impact on the precipitation over the Arabian Sea".ATMOSPHERIC RESEARCH 235(2020).
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