Seasonality of Four Types of Baroclinic Instability in the Global Oceans

doi:10.1029/2022JC018572

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Seasonality of Four Types of Baroclinic Instability in the Global Oceans
	Feng, Ling 2,3; Liu, Chuanyu 1,2,3,4; Koehl, Armin 5; Wang, Fan 1,2,3,4
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
	2022-05-01
卷号	127 期号:5 页码:20
关键词	seasonal variability baroclinic instability types baroclinic energy conversion rate mesoscale eddies
ISSN号	2169-9275
DOI	10.1029/2022JC018572
通讯作者	Liu, Chuanyu(chuanyu.liu@qdio.ac.cn) ; Wang, Fan(fwang@qdio.ac.cn)
英文摘要	Distinct geographical distributions of four types of mesoscale baroclinic instabilities (BCIs) exist in the global oceans, implying preferences of surface or subsurface mesoscale eddies to specific regions. This study explores seasonal variations of global BCI types and their dependence on varying background ocean states with a focus on three representative regions. First, the regions of the Kuroshio Extension and Gulf Stream are representative for distinctive seasonal transition of BCI types: the Charney surface BCIs prevail in winter, while the Phillips BCIs prevail in summer, which is controlled by weak (strong) upper-layer stratification in winter (summer) but is less impacted by the seasonal changes in the mean flow-induced shear. Second, the region covering both the tropics and subtropics of the North Pacific (10 degrees N-35 degrees N) is representative for seasonal meridional migration of the border between the domains of the Phillips and the Charney surface BCIs; their border migrates equatorward (poleward) in spring and summer (autumn and winter), which is primarily caused by the equatorward (poleward) shift of both the North Equatorial Current and the Subtropical Countercurrent in spring and summer (autumn and winter), and is secondarily modulated by the variation in the upper-layer stratification. Third, the Antarctic Circumpolar Current region is chosen to represent a weak seasonal variation of BCIs. Those seasonal variations in BCI types are further demonstrated as being associated with seasonal variations of baroclinic conversion rate, implying possible generation of corresponding eddies.
资助项目	Strategic Priority Research Program, CAS[XDA22050203] ; National Natural Science Foundation of China (NSFC)[41976012] ; National Natural Science Foundation of China (NSFC)[41606026] ; National Natural Science Foundation of China (NSFC)[41730534] ; National Natural Science Foundation of China (NSFC)[Y72143101B]
WOS研究方向	Oceanography
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000802794700001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/179368]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Liu, Chuanyu; Wang, Fan
作者单位	1.Pilot Natl Lab Marine Sci & Technol Qingdao QNLM, Marine Dynam Proc & Climate Funct Lab, Qingdao, Peoples R China 2.Chinese Acad Sci IOCAS, 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.Univ Chinese Acad Sci UCAS, Coll Earth & Planetary Sci, Beijing, Peoples R China 5.Univ Hamburg, Inst Oceanog IFM, Ctr Earth Syst Res & Sustainabil CEN, Hamburg, Germany
推荐引用方式 GB/T 7714	Feng, Ling,Liu, Chuanyu,Koehl, Armin,et al. Seasonality of Four Types of Baroclinic Instability in the Global Oceans[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2022,127(5):20.
APA	Feng, Ling,Liu, Chuanyu,Koehl, Armin,&Wang, Fan.(2022).Seasonality of Four Types of Baroclinic Instability in the Global Oceans.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,127(5),20.
MLA	Feng, Ling,et al."Seasonality of Four Types of Baroclinic Instability in the Global Oceans".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 127.5(2022):20.