气候变化领域集成服务门户(CCPortal): Interactions Between Mesoscale Eddies and Synoptic Oscillations in the Bay of Bengal During the Strong Monsoon of 2019

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DOI	10.1029/2020JC016772
	Interactions Between Mesoscale Eddies and Synoptic Oscillations in the Bay of Bengal During the Strong Monsoon of 2019
	Greaser S.R.; Subrahmanyam B.; Trott C.B.; Roman-Stork H.L.
发表日期	2020
ISSN	21699275
卷号	125 期号:10
英文摘要	The 2019 southwest monsoon season is the first strong monsoon in the last 25 years and occurred concurrently with a strong positive Indian Ocean Dipole (pIOD). Given these unique circumstances, we examine the mesoscale eddy field in the Bay of Bengal (BoB) during 2019 and the interactions between these eddies and 3–7-day synoptic oscillations and tropical systems, which contribute to monsoon rainfall and modulate the active (wet) and break (dry) phases of the Indian monsoon. We find that there is a drastic difference in eddy characteristics between the western (80–90°E) and eastern (90–100°E) BoB, where eddies in the eastern BoB are dominated by coastal Kelvin wave (CKW) dynamics and topographical influences, and the eddies in the western BoB are more heavily modulated by East India Coastal Current dynamics. We further find that the pIOD increased the overall sea level in the BoB and modified CKW propagation in the BoB such that all eddy types had more positive sea level anomalies. We find that cyclonic eddies vary coherently with both upper ocean heat content and 3–7-day bandpass filtered precipitation and that both the number of cyclonic eddies and eddy amplitude increase in coherence with precipitation and ocean heat content following the passage of a tropical system. These results suggest a strong relationship between cyclonic eddies and 3–7-day atmospheric variability. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Bay of Bengal; coastal Kelvin waves; eddies; Indian Ocean Dipole; southwest monsoon; synoptic 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/186654
作者单位	School of the Earth, Ocean and Environment, University of South Carolina, Columbia, SC, United States; School of Ocean Science and Engineering, University of Southern Mississippi, Stennis Space Center, Hattiesburg, MS, United States
推荐引用方式 GB/T 7714	Greaser S.R.,Subrahmanyam B.,Trott C.B.,et al. Interactions Between Mesoscale Eddies and Synoptic Oscillations in the Bay of Bengal During the Strong Monsoon of 2019[J],2020,125(10).
APA	Greaser S.R.,Subrahmanyam B.,Trott C.B.,&Roman-Stork H.L..(2020).Interactions Between Mesoscale Eddies and Synoptic Oscillations in the Bay of Bengal During the Strong Monsoon of 2019.Journal of Geophysical Research: Oceans,125(10).
MLA	Greaser S.R.,et al."Interactions Between Mesoscale Eddies and Synoptic Oscillations in the Bay of Bengal During the Strong Monsoon of 2019".Journal of Geophysical Research: Oceans 125.10(2020).