气候变化领域集成服务门户(CCPortal): On the interaction of mesoscale eddies and a tropical cyclone in the Bay of Bengal

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DOI	10.1007/s11069-021-04524-z
	On the interaction of mesoscale eddies and a tropical cyclone in the Bay of Bengal
	Prakash K.R.; Nigam T.; Pant V.; Chandra N.
发表日期	2021
ISSN	0921030X
起始页码	1981
结束页码	2001
卷号	106 期号:3
英文摘要	Oceanic eddies span over a wide range of sizes and affect the thermodynamic properties of water column. By modifying the thermal structure of the upper ocean, these eddies influence the air-sea heat exchange and, therefore, the strength of a tropical cyclone (TC) that passes over the eddy zone. To understand the interaction of tropical cyclone with different types of eddies (cyclonic and anticyclonic) over the Bay of Bengal (BoB) region, three idealized numerical experiments are performed using an atmosphere–ocean–wave coupled model. In these experiments, the atmospheric and wave models are forced by the realistic surface forcing (i.e. wind, pressure, heat and momentum fluxes) of the Vardah cyclone period (10–15 December 2016) in the BoB. The ocean model is initialized with three idealized conditions, i.e. horizontally constant profile of temperature and salinity throughout the model domain, idealized three-dimensional (3-D) temperature and salinity profiles in the area of 2° radius for cyclonic eddy and anticyclonic eddy. The 3-D eddy profile is placed in the path of TC Vardah track. The strength and radius of both idealized cyclonic and anticyclonic eddies are kept same. The model-simulated results of these three experiments were intercompared and it is found that the tropical cyclone interaction with an anticyclonic eddy had provided an ancillary strength to the TC by raising the tropical cyclone heat potential (TCHP) in comparison with other experiments. The utilization of coupled ocean–atmosphere–wave model had also provided a better representation of ocean–atmosphere coupled feedback processes during TC interaction with different eddies. The analysis of feedback processes depicted that the TC interaction with an anticyclonic eddy has raised the magnitude of its existing moist-static-energy comparative to the cyclonic eddy interaction case which resulted into an increase in the strength of the TC. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. part of Springer Nature.
关键词	Bay of Bengal COAWST Coupled model Eddies Moist static energy Tropical cyclone
英文关键词	air-sea interaction; anticyclone; heat flux; mesoscale eddy; thermodynamic property; tropical cyclone; water column; wave modeling; Bay of Bengal; Indian Ocean
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206502
作者单位	Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, New Delhi, 110016, India; Centro Euro-Mediterraneo sui Cambiamenti Climatici, Bologna, 40127, Italy
推荐引用方式 GB/T 7714	Prakash K.R.,Nigam T.,Pant V.,et al. On the interaction of mesoscale eddies and a tropical cyclone in the Bay of Bengal[J],2021,106(3).
APA	Prakash K.R.,Nigam T.,Pant V.,&Chandra N..(2021).On the interaction of mesoscale eddies and a tropical cyclone in the Bay of Bengal.Natural Hazards,106(3).
MLA	Prakash K.R.,et al."On the interaction of mesoscale eddies and a tropical cyclone in the Bay of Bengal".Natural Hazards 106.3(2021).