Subsurface eddies east of the Philippines: Geographic characteristics, vertical structures, volume and thermohaline transport

doi:10.1016/j.pocean.2024.103228

IOCAS-IR > 海洋环流与波动重点实验室

	Subsurface eddies east of the Philippines: Geographic characteristics, vertical structures, volume and thermohaline transport
	Zhang, Linlin 1,2; Song, Weiqi 1,2,3; Hui, Yuchao 1; Wang, Zhenxiao1,4,5 ; Hu, Dunxin 1,2
	2024-03-01
发表期刊	PROGRESS IN OCEANOGRAPHY
ISSN	0079-6611
卷号	222 页码:16
通讯作者	Zhang, Linlin(zhanglinlin@qdio.ac.cn) ; Song, Weiqi(songwq@qdio.ac.cn)
摘要	Energetic subsurface eddies (SSEs) play a significant role in regulating the subthermocline circulation east of the Philippines. However, due to the paucity of targeted observations, they remain largely unexplored. By analyzing the outputs from an eddy-resolving ocean general circulation model (OGCM), this study investigated the statistics of SSEs east of the Philippines, including their geographic characteristics, vertical structures, and eddy-induced transport. During the period of 2009-2019, approximately 1927 and 1176 SSEs were detected to be anticyclonic and cyclonic, respectively, indicating the predominance of subsurface anticyclonic eddies (SSAE). The hotspot area of SSEs is in the latitude band of 6 degrees N-15 degrees N off the Philippine coast, especially around 10 degrees N and 14 degrees N-15 degrees N prevailing abundant SSEs. Most SSEs originate at similar to 138 degrees E furthest with a mean lifespan of 55 days and a westward translation speed of 6 cm/s. The composite SSAE exhibits a typical subsurface-intensified feature with a velocity core at similar to 520 m, while the subsurface cyclonic eddy (SSCE) has a relatively shallow core at similar to 420 m and exhibits considerable strength near the surface with a rotating speed is around 5 cm/s. Temperature anomalies induced by SSEs show a dual-core structure associated with lens-like isopycnal undulations, and salinity anomalies are characterized by an alternating positive and negative signal owing to the complexity of the water masses. SSEs-induced meridional volume transport mainly occurs off the Philippine coast, where the northward transport is approximately 0.3 Sv and the southward transport is approximately 0.5 Sv. The zonal volume transport of SSEs is 1-2 Sv per latitude and mainly occurs in the North Equatorial Current (NEC) region. SSEs-induced stirring heat/salt transport is 1-2 orders larger than the trapping component and is mainly concentrated near the Mindanao coast. The meridional stirring heat transport is equatorward, which is up to 2.7 x 10(7) W/m, and the salt transport is northward with a magnitude of similar to 100 kgm(-1)s(-1) between 200 m and 2000 m. At the 8 degrees N section, the mean salt transport associated with SSEs is about 24% of that induced by the Mindanao Undercurrent (MUC).
关键词	Subsurface eddies East of the Philippines Geographic characteristics Composite structures eddy-induced transport
DOI	10.1016/j.pocean.2024.103228
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42122041] ; National Key Research and Development Program of China[2020YFA0608801] ; Project of Science and Technology Innovation of Laoshan Laboratory[LSKJ202201702] ; TS Scholar Program[tsqn202103128] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42010105] ; Open research cruise - NSFC Shiptime Sharing Project[42249909] ; Open research cruise - NSFC Shiptime Sharing Project[NORC2023-09]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001194182000001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS关键词	MESOSCALE EDDIES ; SUBTHERMOCLINE EDDIES ; EQUATORIAL PACIFIC ; TROPICAL PACIFIC ; NORTH PACIFIC ; EDDY ; OCEAN ; HEAT ; VORTICES ; SEA
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/185071
专题	海洋环流与波动重点实验室
通讯作者	Zhang, Linlin; Song, Weiqi
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 2.Laoshan Lab, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Shenzhen Univ, Coll Comp Sci & Software Engn, Shenzhen, Peoples R China 5.Shenzhen Marine Dev & Promot Ctr, Shenzhen, Peoples R China
第一作者单位	海洋环流与波动重点实验室
通讯作者单位	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Zhang, Linlin,Song, Weiqi,Hui, Yuchao,et al. Subsurface eddies east of the Philippines: Geographic characteristics, vertical structures, volume and thermohaline transport[J]. PROGRESS IN OCEANOGRAPHY,2024,222:16.
APA	Zhang, Linlin,Song, Weiqi,Hui, Yuchao,Wang, Zhenxiao,&Hu, Dunxin.(2024).Subsurface eddies east of the Philippines: Geographic characteristics, vertical structures, volume and thermohaline transport.PROGRESS IN OCEANOGRAPHY,222,16.
MLA	Zhang, Linlin,et al."Subsurface eddies east of the Philippines: Geographic characteristics, vertical structures, volume and thermohaline transport".PROGRESS IN OCEANOGRAPHY 222(2024):16.