| Observed Deep Anticyclonic Cap Over Caiwei Guyot | |
| Guo, Binbin2,3,4,5; Wang, Weiqiang2,4,6; Shu, Yeqiang2,4,6; He, Gaowen3,4; Zhang, Dongsheng7; Deng, Xiguang3; Liang, Qianyong3,4; Yang, Yong3; Xie, Qiang1,6,8; Wang, Haifeng3 | |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
 |
| 2020-10-01 | |
| 卷号 | 125期号:10页码:14 |
| 关键词 | anticyclonic cap deep guyot cold ring corich crusts tidal rectification |
| ISSN号 | 2169-9275 |
| DOI | 10.1029/2020JC016254 |
| 英文摘要 | The mean circulation pattern and its mechanism over Caiwei Guyot (1,308-5,600 m) in the Northwest Pacific were studied utilizing 3 years of in situ data. A deep anticyclonic cap was found to enclose the entire guyot from its bottom up to a depth of 728 m, which is composed of a stable but highly asymmetric anticyclonic circulation at the foot and a bottom-trapped anticyclonic circulation over the summit. On the slope, the circulation is complex with a dominant anticyclonic circulation near the bottom and a weak cyclonic circulation at similar to 2,200 m. The anticyclonic cap intensity over the summit is significantly modulated by the time-varying impinging flow. An intensified cold ring above the summit edge was observed at Caiwei Guyot, which differs from the cold domes observed over traditional conic seamounts. Further analysis suggests that the impinging flow is primarily responsible for the cap formation, and the M-2 tide-seamount interaction plays a secondary role. The anticyclonic cap may play a role in the local geological distribution. Plain Language Summary Seamounts are ubiquitous topographic features found in the global ocean, and understanding the effect of seamounts on local circulation has garnered significant attention from oceanographers. This study examines a topographically induced deep anticyclonic circulation system over Caiwei Guyot (CG, 1,308-5,600 m), which is a deep flat-topped seamount located in the Northwest Pacific Ocean, utilizing 3 years of in situ data. It was found to have a time-varying anticyclonic circulation at the summit and spatially variable anticyclonic circulation at the foot; however, along the slopes, the circulation is complex with a dominant anticyclonic circulation near the bottom and weak cyclonic circulation at similar to 2,200 m. A ring of cold water above the summit edge was observed, which differs from the classical anticyclonic circulation system observed above a conical seamount. The mean impinging flow and the interaction between the semidiurnal tide and topography are responsible for generating the anticyclonic circulation system. Moreover, the anticyclonic circulation system could potentially influence the local geological distribution. To the authors' knowledge, this study provides the first comprehensive evaluation of an observed anticyclonic circulation system covering an entire deep flat-topped seamount. Key Points A comprehensive evaluation of the anticyclonic cap over a deep guyot is presented with 3 years of in situ data An intensified cold ring above the summit edge is revealed Impinging flow and M-2 rectification play primary and secondary roles in driving the anticyclonic cap, respectively |
| 资助项目 | National Natural Science Foundation of China[91958202] ; National Natural Science Foundation of China[91858203] ; National Natural Science Foundation of China[41776036] ; National Natural Science Foundation of China[41676015] ; National Natural Science Foundation of China[42076019] ; National Natural Science Foundation of China[41676013] ; MNR Key Laboratory of Marine Mineral Resources[KLMMR-2017-A-02] ; Foundation of China Ocean Mineral Resources RD Association[DY135-E2-2-06] ; Foundation of China Ocean Mineral Resources RD Association[DY135-C1-1-01] ; Open Project Program of State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences[LTOZZ2001] ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0304] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-XH-2019-2] ; China National Project Natural Gas Hydrate Exploration and Production Test[DD20160217] ; Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences[ISEE2018PY06] |
| WOS关键词 | TOPOGRAPHIC ROSSBY WAVES ; TALL ISOLATED SEAMOUNT ; INTERNAL LEE WAVES ; SEA-FLOOR ; CIRCULATION ; GENERATION ; CURRENTS ; MOTION ; DYNAMICS ; SOLIDS |
| WOS研究方向 | Oceanography |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000612077200012 |
| 资助机构 | National Natural Science Foundation of China ; MNR Key Laboratory of Marine Mineral Resources ; Foundation of China Ocean Mineral Resources RD Association ; Open Project Program of State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Key Research Program of the Chinese Academy of Sciences ; China National Project Natural Gas Hydrate Exploration and Production Test ; Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences |
| 内容类型 | 期刊论文 |
| 源URL | [http://ir.idsse.ac.cn/handle/183446/8367]  |
| 专题 | 深海科学研究部_海洋环流观测与数值模拟研究室 |
| 通讯作者 | Wang, Weiqiang; Shu, Yeqiang |
| 作者单位 | 1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Peoples R China 2.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Peoples R China 3.China Geol Survey, Guangzhou Marine Geol Survey, Key Lab Marine Mineral Resources, Guangzhou, Peoples R China 4.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou, Peoples R China 5.Univ Chinese Acad Sci, Beijing, Peoples R China 6.Chinese Acad Sci, Innovat Acad South China Sea Ecol & Environm Engn, Guangzhou, Peoples R China 7.MNR, Inst Oceanog 2, Key Lab Marine Ecosyst Dynam, Hangzhou, Peoples R China 8.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 9.MNR, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Binbin,Wang, Weiqiang,Shu, Yeqiang,et al. Observed Deep Anticyclonic Cap Over Caiwei Guyot[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2020,125(10):14. |
| APA | Guo, Binbin.,Wang, Weiqiang.,Shu, Yeqiang.,He, Gaowen.,Zhang, Dongsheng.,...&Wang, Jun.(2020).Observed Deep Anticyclonic Cap Over Caiwei Guyot.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,125(10),14. |
| MLA | Guo, Binbin,et al."Observed Deep Anticyclonic Cap Over Caiwei Guyot".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 125.10(2020):14. |
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