Institutional Repository of Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
| The Physical-Biogeochemical Responses to a Subsurface Anticyclonic Eddy in the Northwest Pacific | |
Ding, Ya-nan1,2,3; Yu, Fei1,2,3,4,5; Ren, Qiang1,3,4 ; Nan, Feng1,3,4,5; Wang, Ran1,3,4; Liu, Yansong1,3,4; Tang, Ying1,3
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| 2022-01-27 | |
| Source Publication | FRONTIERS IN MARINE SCIENCE
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| Volume | 8Pages:20 |
| Corresponding Author | Yu, Fei(yuf@qdio.ac.cn) |
| Abstract | Due to the unique physical processes of mesoscale eddies, the physical and biogeochemical properties within the subsurface anticyclonic eddy (SSAE) and in the surrounding water are distinct. Analyses using satellite and model data have revealed distinct seasonal variations in the central potential density structure of a long-standing SSAE south of Japan; this SSAE exhibits a normal concave isopycnals structure from January to April and a convex lens isopycnals structure from May to December, and these variations may be related to the subduction of low-potential vorticity (PV) mode water. In contrast to the idea of the self-sustained oscillation mechanism, the strength of the SSAE was enhanced due to the eddy kinetic energy provided by dramatic increasing of the positive baroclinic conversion rate during the Kuroshio path transition period from the non-large meander (NLM) path to the large meander (LM) path. Twofold to threefold enhancement of chlorophyll (CHL) was detected in the subsurface CHL maximum layers at the core of the SSAE, and this enhancement was related to the injection of nutrients into the euphotic layer due to winter mixing and the convex of isopycnals. During the period from May to December, elevated CHL and dissolved oxygen (DO) levels and reduced nitrate levels were observed along the periphery of the eddy below the maximum subsurface CHL anomaly depth. The combined result of these two processes: (1) the central downward displaced isopycnals caused by intensified SSAE, and (2) winter mixing deepened to the nutricline due to the thickened mixed layer depth (MLD) and weakened stratification in winter 2017 (during the NLM period) may have led to numerous nutrients and CHL enrichments throughout the mixed layer, thus generating a CHL bloom in the following April. The SSAE intensified in winter 2018 (during the LM period), whereas the shallower MLD and stronger stratification limited the depth of CHL downward displacement. |
| Keyword | subsurface anticyclonic eddy physical-biogeochemical structure chlorophyll winter mixing Kuroshio path |
| DOI | 10.3389/fmars.2021.766544 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Global Climate Changes and Air-sea Interaction Program[GASI-02-PACSTMSspr] ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1406401] ; National Natural Science Foundation of Shandong Province[ZR2020MD057] |
| WOS Research Area | Environmental Sciences & Ecology ; Marine & Freshwater Biology |
| WOS Subject | Environmental Sciences ; Marine & Freshwater Biology |
| WOS ID | WOS:000753646500001 |
| Publisher | FRONTIERS MEDIA SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.qdio.ac.cn/handle/337002/178087 |
| Collection | 海洋环流与波动重点实验室 |
| Corresponding Author | Yu, Fei |
| Affiliation | 1.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China 2.Univ Chinese Acad Sci, Coll Marine Sci, Beijing, Peoples R China 3.Chinese Acad Sci, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 5.Pilot Natl Lab Marine Sci & Technol, Marine Dynam Proc & Climate Funct Lab, Qingdao, Peoples R China |
| First Author Affilication | Institute of Oceanology, Chinese Academy of Sciences |
| Corresponding Author Affilication | Institute of Oceanology, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Ding, Ya-nan,Yu, Fei,Ren, Qiang,et al. The Physical-Biogeochemical Responses to a Subsurface Anticyclonic Eddy in the Northwest Pacific[J]. FRONTIERS IN MARINE SCIENCE,2022,8:20. |
| APA | Ding, Ya-nan.,Yu, Fei.,Ren, Qiang.,Nan, Feng.,Wang, Ran.,...&Tang, Ying.(2022).The Physical-Biogeochemical Responses to a Subsurface Anticyclonic Eddy in the Northwest Pacific.FRONTIERS IN MARINE SCIENCE,8,20. |
| MLA | Ding, Ya-nan,et al."The Physical-Biogeochemical Responses to a Subsurface Anticyclonic Eddy in the Northwest Pacific".FRONTIERS IN MARINE SCIENCE 8(2022):20. |
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