Dynamical Ocean Responses to Typhoon Malakas (2016) in the Vicinity of Taiwan

doi:10.1029/2020JC016663

IOCAS-IR > 海洋环流与波动重点实验室

	Dynamical Ocean Responses to Typhoon Malakas (2016) in the Vicinity of Taiwan
	Shen, Dongliang 1; Li, Xiaofeng 2,3; Wang, Jia4 ; Bao, Shaowu 1; Pietrafesa, Leonard J.1,5
	2021-02-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN	2169-9275
卷号	126 期号:2 页码:21
通讯作者	Li, Xiaofeng([email protected])
摘要	Saffir-Simpson Category-4 Typhoon Malakas crossed the Kuroshio, the Western Boundary Current of the North Pacific Ocean, and moved along the path of the Kuroshio for eight days between September 12 and 20, 2016. Malakas induced a 3-4 degrees C sea surface cooling and an increase in sea surface Chlorophyll-a concentration to 0.8 mg/m(3). The total cooling area was approximately 18,000 km(2). Satellite observations show that Malakas triggered two upwelling regions associated with two mesoscale eddies, both to the northeast of Taiwan. The Regional Oceanic Modeling System (ROMS) was employed to offer insights into the dynamical mechanisms on the ocean response to a typhoon. The numerical model results reveal that a coastal upwelling event was induced by southeasterly winds blowing prior to the arrival of Malakas' outer band, and caused a surface cooling near Taiwan's northeast coast. A branch of the Taiwan Warm Current interacted with the offshore Kuroshio current to form an eddy prior to the typhoon's arrival. Malakas then facilitated the development of the near-coastal eddy. An open ocean eddy was triggered by inertial-Ekman pumping under the forcing effect of Malakas. The interaction between the southward current caused by Malakas and the northeastward flowing Kuroshio maintained these two induced mesoscale eddies. Numerical results show a near-inertial oscillation (IO) of about a 26-h period with an e-folding time scale of similar to 5 days was magnified and modulated by Malakas. The typhoon-induced oceanic phenomena were very well revealed in this combined observational and numerical modeling study. Plain Language Summary Typhoon Malakas passed through and affected the ocean to the northeast of Taiwan from September 12 to 20, 2016. Two surface cooling regions were observed by geostationary satellites after Typhoon Malakas passed by the area. The revelation of the factors responsible for inducing the oceanic surface cooling is crucial in understanding atmosphere-ocean dynamic processes and managing the local ecosystem resources. A numerical ocean model was employed in an attempt to replicate the oceanic phenomena that were observed. The model results suggest that a coastal upwelling event and an oceanic eddy were induced near the northeast coast of Taiwan prior to the arrival of the typhoon and subsequently enhanced by Malakas. An open ocean eddy was also triggered to the northeast of Taiwan by Malakas. The dynamic balance analyses of numerical model results reveal that inertialEkman pumping caused by Malakas was the critical factor in the induction of these phenomena. Eddyinduced upwelling was triggered and subsequently cooled down ocean surface temperatures. In addition, the variant typhoon wind magnified a near-inertial oscillation of about a 26-h period, in the current field, with a similar to 5-day e-folding time scale, to the northeast of Taiwan, which was imbedded into the growth and decay of the eddies.
DOI	10.1029/2020JC016663
收录类别	SCI
语种	英语
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)[XDA19060101]; Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)[XDB42040401]; Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)[XDA19090103]; Key R & D project of Shandong Province[2019JZZY010102]; Key deployment project of Center for Ocean Mega-Science, CAS[COMS2019R02]; National Natural Science Foundation of China[41776183]; National Science Foundation[AGS-1624068]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000624429800033
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/170148
专题	海洋环流与波动重点实验室
通讯作者	Li, Xiaofeng
作者单位	1.Coastal Carolina Univ, Dept Coastal & Marine Syst Sci, Conway, SC USA 2.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 4.NOAA Great Lakes Environm Res Lab, Ann Arbor, MI USA 5.North Carolina State Univ, Dept Marine Earth & Atmospher Sci, Raleigh, NC USA
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Shen, Dongliang,Li, Xiaofeng,Wang, Jia,et al. Dynamical Ocean Responses to Typhoon Malakas (2016) in the Vicinity of Taiwan[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2021,126(2):21.
APA	Shen, Dongliang,Li, Xiaofeng,Wang, Jia,Bao, Shaowu,&Pietrafesa, Leonard J..(2021).Dynamical Ocean Responses to Typhoon Malakas (2016) in the Vicinity of Taiwan.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,126(2),21.
MLA	Shen, Dongliang,et al."Dynamical Ocean Responses to Typhoon Malakas (2016) in the Vicinity of Taiwan".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 126.2(2021):21.

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