气候变化领域集成服务门户(CCPortal): Role of external forcing on the seasonal and interannual variability of mixed layer depth over the Bay of Bengal using reanalysis datasets during 1980

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DOI	10.1016/j.dynatmoce.2020.101200
	Role of external forcing on the seasonal and interannual variability of mixed layer depth over the Bay of Bengal using reanalysis datasets during 1980–2015
	Sadhukhan B.; Chakraborty A.; Kumar A.
发表日期	2021
ISSN	03770265
卷号	93
英文摘要	The monsoon reversal winds in different seasons and high influx of freshwater from various rivers make the Bay of Bengal (BoB) a unique region. Thus, the knowledge of the dynamics of the mixed layer over this region is very important to assess the climatic variation of the Indian subcontinent. A comprehensive study of the role of external forcing on the seasonal and interannual mixed layer depth (MLD) variability over the BoB is carried out for 36 years (1980–2015) using reanalysis products. A weak and strong seasonality of MLD is observed over the northern and the southern BoB (NBoB and SBoB) respectively. The partial correlation suggests that the net heat flux (Qnet) is the major contributor to the deepening of MLD over the NBoB, whereas the wind stress controls the deepening over the SBoB. The seasonal variability reveals the deepening of MLD during summer and winter monsoon and the shallowing during pre- and post-monsoon over the BoB. The relation of the interannual MLD variability and the different phases of the Indian Ocean Dipole (IOD) reveals that the negative phase of IOD is associated with deeper MLD over BoB while the positive phase of IOD depicts shallower MLD. In addition, the opposing characteristic of MLD is highly prominent during October-December. This is majorly contributed by variations related to the second downwelling Kelvin and associated Rossby waves over BoB for the opposing phases of the IOD years. © 2021 Elsevier B.V.
英文关键词	Bay of Bengal; Indian Ocean dipole; Kelvin wave; Mixed layer depth; Rossby wave
语种	英语
scopus关键词	Atmospheric thermodynamics; Mechanical waves; Climatic variation; External forcing; Indian ocean dipoles; Indian subcontinents; Mixed layer depths; Partial correlation; Seasonal and interannual variability; Seasonal variability; Heat flux; annual variation; atmospheric forcing; data set; Indian Ocean Dipole; Kelvin wave; monsoon; Rossby wave; seasonal variation; Bay of Bengal; Indian Ocean
来源期刊	Dynamics of Atmospheres and Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178252
作者单位	Centre for Oceans, Rivers, Atmosphere and Land Sciences, Indian Institute of Technology Kharagpur, India
推荐引用方式 GB/T 7714	Sadhukhan B.,Chakraborty A.,Kumar A.. Role of external forcing on the seasonal and interannual variability of mixed layer depth over the Bay of Bengal using reanalysis datasets during 1980–2015[J],2021,93.
APA	Sadhukhan B.,Chakraborty A.,&Kumar A..(2021).Role of external forcing on the seasonal and interannual variability of mixed layer depth over the Bay of Bengal using reanalysis datasets during 1980–2015.Dynamics of Atmospheres and Oceans,93.
MLA	Sadhukhan B.,et al."Role of external forcing on the seasonal and interannual variability of mixed layer depth over the Bay of Bengal using reanalysis datasets during 1980–2015".Dynamics of Atmospheres and Oceans 93(2021).