Drastic Fluctuation in Water Exchange Between the Yellow Sea and Bohai Sea Caused by Typhoon Lekima in August 2019: A Numerical Study

doi:10.1029/2022JC019260

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	Drastic Fluctuation in Water Exchange Between the Yellow Sea and Bohai Sea Caused by Typhoon Lekima in August 2019: A Numerical Study
	Yan, Junjie 1; Zhai, Fangguo 1; Gu, Yanzhen 2; Liu, Xingchuan 3; Li, Peiliang 4; Liu, Zizhou 1; Wang, Yucheng 5
	2023-06-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN	2169-9275
卷号	128 期号:6 页码:26
通讯作者	Zhai, Fangguo(gfzhai@ouc.edu.cn) ; Gu, Yanzhen(guyanzhen@zju.edu.cn)
摘要	Connecting the Bohai Sea (BS) and Yellow Sea (YS), the Bohai Strait is vital in controlling physical-biogeochemical conditions in the East Asian marginal seas. In August 2019, Typhoon Lekima moved northward inland into eastern China and caused drastic water exchange through the Bohai Strait. The specific variation and underlying dynamics involved were investigated with observations and high-resolution numerical simulations. Volume transport featured an intense inflow followed by an intense outflow, with a fluctuation magnitude of 1.88 Sv, which was much greater than the seasonal-interannual variations. The corresponding current patterns presented three phases: strait-wide inflow, strait-wide outflow, and outflow in the south and inflow in the north. The strait-wide inflow was driven by strong east-northeasterly winds through local Ekman dynamics. The strait-wide outflow resulted from the dynamic adjustment of ocean currents accompanying the rapid weakening of easterly winds. The third current pattern was part of a large-scale cyclonic circulation in the BS and North YS and was governed by different factors in the southern and northern straits. Further comparisons indicated that transport caused by winter storms and other typhoons in the year had opposite phase variations to that caused by Lekima. The underlying dynamics mainly involved local Ekman dynamics and/or remote wind forcing via the propagation of coastal trapped waves but could differ greatly from events. Finally, we found that to a large extent, geostrophic transport derived from the sea surface height difference across the Bohai Strait could be used as actual transport during synoptic weather events.
关键词	Typhoon Lekima water exchange Bohai Strait synoptic fluctuation coastal trapped waves
DOI	10.1029/2022JC019260
收录类别	SCI
语种	英语
资助项目	National Science Foundation of China[42176016] ; Shandong Provincial Natural Science Foundation[ZR2020MD059] ; High-level Personnel of Special Support Program of Zhejiang Province[2019R52045] ; Key Research and Development Project of Zhejiang Province[2020C03012] ; Scientific and Technological Projects of Zhoushan[2022C81010]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001022749300001
出版者	AMER GEOPHYSICAL UNION
WOS关键词	SURFACE ; MODEL ; WAVES ; WIND ; STRAIT
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/182443
专题	中国科学院海洋研究所
通讯作者	Zhai, Fangguo; Gu, Yanzhen
作者单位	1.Ocean Univ China, Coll Ocean & Atmospher Sci, Qingdao, Peoples R China 2.Zhejiang Univ, Inst Phys Oceanog & Remote Sensing, Ocean Coll, Zhoushan, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China 4.Zhejiang Univ, Hainan Inst, Sanya, Peoples R China 5.High Performance Comp Ctr, Pilot Natl Lab Marine Sci & Technol, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Yan, Junjie,Zhai, Fangguo,Gu, Yanzhen,et al. Drastic Fluctuation in Water Exchange Between the Yellow Sea and Bohai Sea Caused by Typhoon Lekima in August 2019: A Numerical Study[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2023,128(6):26.
APA	Yan, Junjie.,Zhai, Fangguo.,Gu, Yanzhen.,Liu, Xingchuan.,Li, Peiliang.,...&Wang, Yucheng.(2023).Drastic Fluctuation in Water Exchange Between the Yellow Sea and Bohai Sea Caused by Typhoon Lekima in August 2019: A Numerical Study.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,128(6),26.
MLA	Yan, Junjie,et al."Drastic Fluctuation in Water Exchange Between the Yellow Sea and Bohai Sea Caused by Typhoon Lekima in August 2019: A Numerical Study".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 128.6(2023):26.