气候变化领域集成服务门户(CCPortal): Response of the Bay of Bengal to 3-7-Day Synoptic Oscillations During the Southwest Monsoon of 2019

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DOI	10.1029/2020JC016200
	Response of the Bay of Bengal to 3-7-Day Synoptic Oscillations During the Southwest Monsoon of 2019
	Subrahmanyam B.; Roman-Stork H.L.; Murty V.S.N.
发表日期	2020
ISSN	21699275
卷号	125 期号:6
英文摘要	The satellite-derived precipitation over central India (73–78°E, 20–25°N) during the 2019 southwest monsoon season reveals that high-amplitude 3-7-day synoptic oscillations dominated the other intraseasonal oscillations and contributed to the excess seasonal monsoon rainfall. In this paper, we address the contribution of 3-7-day synoptic oscillations in atmospheric and oceanic parameters during the 2019 southwest monsoon season over the Bay of Bengal (BoB). Our study reveals that both satellite observations and the Nucleus for European Modeling of the Ocean (NEMO) model simulations show high-amplitude 3-7-day synoptic scale events during the 2019 monsoon. The upper 300 m of the water column responds to the basin-scale 3-7-day synoptic oscillations as revealed in the vertical structures of NEMO model simulated temperature, salinity, and currents in the BoB. The synoptic scale wind stress drives strong currents in the shallow mixed layer due to salinity stratification in the northern BoB. The northward propagation of the synoptic scale oscillations is evident across the BoB but is capped to the base of the mixed layer, above which the propagation is affected by wind stress and the spread of freshwater flux. The 3-7-day synoptic scale oscillations in NEMO sea surface height appear to be related to synoptic scale wind-driven convergence and divergence of waters through mesoscale eddy circulations that in turn contribute to thermocline variability, rather than the temperature and salinity in the mixed layer. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Bay of Bengal; NEMO; salinity; sea surface height; southwest monsoon; synotic oscillations
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/186822
作者单位	School of the Earth, Ocean and Environment, University of South Carolina, Columbia, SC, United States; Council for Scientific and Industrial Research (CSIR), National Institute of Oceanography Regional Centre, Visakhapatnam, India
推荐引用方式 GB/T 7714	Subrahmanyam B.,Roman-Stork H.L.,Murty V.S.N.. Response of the Bay of Bengal to 3-7-Day Synoptic Oscillations During the Southwest Monsoon of 2019[J],2020,125(6).
APA	Subrahmanyam B.,Roman-Stork H.L.,&Murty V.S.N..(2020).Response of the Bay of Bengal to 3-7-Day Synoptic Oscillations During the Southwest Monsoon of 2019.Journal of Geophysical Research: Oceans,125(6).
MLA	Subrahmanyam B.,et al."Response of the Bay of Bengal to 3-7-Day Synoptic Oscillations During the Southwest Monsoon of 2019".Journal of Geophysical Research: Oceans 125.6(2020).