气候变化领域集成服务门户(CCPortal): The Role of Salinity in the Southeastern Arabian Sea in Determining Monsoon Onset and Strength

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DOI	10.1029/2019JC015592
	The Role of Salinity in the Southeastern Arabian Sea in Determining Monsoon Onset and Strength
	Roman-Stork H.L.; Subrahmanyam B.; Murty V.S.N.
发表日期	2020
ISSN	21699275
卷号	125 期号:1
英文摘要	In this study, we examine the role of freshwater transported from the Bay of Bengal into the southeastern Arabian Sea (SEAS) in determining both the timing of monsoon onset and the strength of the ensuing monsoon. To do this, we use a combination of satellite-derived salinity data and reanalysis products from 1980 to 2016 in order to discuss seasonal, interannual, subdecadal, and long-term decadal variability in various atmospheric and oceanic contributors such as ocean heat content, freshwater transport, ERA5 instantaneous moisture flux, mixed layer depth, and barrier layer thickness. The salt budget in the SEAS reveals the dominance of meridional freshwater advective transport that brings in variability in salinity and thus in salinity stratification, as well as in mixed layer processes. We find that these parameters exhibit the prevalence of a long-term decadal variability (with trends of increasing/decreasing phases over a 15-year duration) over which interannual (3-year trend) and intradecadal (7-year trend) variability trends are superimposed. The patterns of both the 3- and 7-year trends follow each other closely, and relatively high amplitudes are seen in the 3-year trends. The long-term decrease in moisture flux and freshwater transport into the SEAS along with a rise in ocean heat content over a 15-year duration after 1994 contributed to a lack of strong monsoons in recent years; the prevailing interannual and intradecadal variability in these parameters associated with the Indian Ocean Dipole and El Niño Southern Oscillation events favored weaker and normal monsoons after 1994. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Arabian Sea; Barrier Layer; Freshwater; Indian Monsoon; Ocean Heat Content; Salinity
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187013
作者单位	School of the Earth, Ocean, and Environment, University of South Carolina, Columbia, SC, United States; Physical Oceanography Division, Council for Scientific and Industrial Research (CSIR)–National Institute of Oceanography Regional Centre, Visakhapatnam, India
推荐引用方式 GB/T 7714	Roman-Stork H.L.,Subrahmanyam B.,Murty V.S.N.. The Role of Salinity in the Southeastern Arabian Sea in Determining Monsoon Onset and Strength[J],2020,125(1).
APA	Roman-Stork H.L.,Subrahmanyam B.,&Murty V.S.N..(2020).The Role of Salinity in the Southeastern Arabian Sea in Determining Monsoon Onset and Strength.Journal of Geophysical Research: Oceans,125(1).
MLA	Roman-Stork H.L.,et al."The Role of Salinity in the Southeastern Arabian Sea in Determining Monsoon Onset and Strength".Journal of Geophysical Research: Oceans 125.1(2020).