Observations of Intermittent Seamount-Trapped Waves and Topographic Rossby Waves around the Slope of a Low-Latitude Deep Seamount

doi:10.1175/JPO-D-22-0121.1

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 海洋环流观测与数值模拟研究室

	Observations of Intermittent Seamount-Trapped Waves and Topographic Rossby Waves around the Slope of a Low-Latitude Deep Seamount
	Guo, Binbin 5,6,7,8; Shu, Yeqiang 4,8; Wang, Weiqiang 4,8; He, Gaowen 5,7; Liang, Qianyong 5,7; Zhang, Dongsheng 3; Yu, Lusha 2; Wang, Jun 2; Deng, Xiguang 5,7; Yang, Yong 5,7
刊名	JOURNAL OF PHYSICAL OCEANOGRAPHY
	2024
卷号	54 期号:1 页码:281-299
关键词	Bottom currents Ocean dynamics Topographic effects Oceanic waves
ISSN号	0022-3670
DOI	10.1175/JPO-D-22-0121.1
英文摘要	Observations of currents and temperatures from four moorings deployed around the deep slope (similar to 2500 m) of Caiwei Guyot in the Pacific Prime Crust Zone were utilized to investigate topographically trapped waves at low-latitude seamounts. Contrasting with commonly reported persistent diurnal seamount-trapped wave cases at middle and high latitudes, the subinertial variability in deep currents and temperatures at the slope of Caiwei Guyot was primarily characterized by two distinct lower-frequency bands (i.e., 13-24 and 3.3-4.7 days). These subinertial variabilities are interpreted as intermittent seamount-trapped waves and topographic Rossby waves (TRWs). During certain time periods, the observations include key signatures of seamount-trapped waves, such as near-opposite phases of azimuthal velocity (and temperature) on opposite flanks of the seamount, and patterns of temporal current rotation consistent with counterrotating cells of horizontal current propagating counterclockwise around the seamount. After comparing these observations to idealized seamount-trapped wave solutions, we conclude that the 13-24-day (3.3-4.7-day) energy is mainly due to radial-vertical mode 5 (3) for azimuthal wavenumber 1 (3). Sometimes the subinertial energy remained pronounced at only one flank of the seamount, primarily explained as TRWs with 192-379-m vertical trapping scale and 14-28-km wavelength. Upper-layer mesoscale perturbations might provide energy for deep seamount-trapped waves and TRWs. This study highlights the role of topographically trapped waves in modulating the deep circulation at low-latitude seamounts.
资助项目	National Natural Science Foundation of China[91958202] ; National Natural Science Foundation of China[42206033] ; National Natural Science Foundation of China[42076019] ; Basic Frontiers and Innovative Development 2023 Integration Project of South China Sea Institute of Oceanology[SCSIO2023QY02] ; Marine Geological Survey Program of China Geological Survey[DD20221706] ; Marine Geological Survey Program of China Geological Survey[DD20230065] ; Guangdong Basic and Applied Basic Research Foundation[2020A1515111083] ; Key Research and Development Project of Guangdong Province[2020B1111510001] ; Research Foundation of National Engineering Research Center for Gas Hydrate Exploration and Development[2022GMGSCXYF41003]
WOS关键词	TALL ISOLATED SEAMOUNT ; TIDAL CURRENTS ; GULF ; OCEAN ; FLOW ; OSCILLATIONS ; VARIABILITY ; CIRCULATION ; GENERATION ; TIDES
WOS研究方向	Oceanography
语种	英语
出版者	AMER METEOROLOGICAL SOC
WOS记录号	WOS:001143925900005
资助机构	National Natural Science Foundation of China ; Basic Frontiers and Innovative Development 2023 Integration Project of South China Sea Institute of Oceanology ; Marine Geological Survey Program of China Geological Survey ; Guangdong Basic and Applied Basic Research Foundation ; Key Research and Development Project of Guangdong Province ; Research Foundation of National Engineering Research Center for Gas Hydrate Exploration and Development
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/10816]
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	Shu, Yeqiang; Wang, Weiqiang
作者单位	1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Peoples R China 2.Second Inst Oceanog, State Key Lab Satellite Ocean Environm Dynam, MNR, Hangzhou, Peoples R China 3.Second Inst Oceanog, Key Lab Marine Ecosyst Dynam, MNR, Hangzhou, Peoples R China 4.Southern Marine Sci & Engn Guangdong Lab Guangzhou, Guangzhou, Peoples R China 5.China Geol Survey, Key Lab Marine Mineral Resources, Guangzhou Marine Geol Survey, Guangzhou, Peoples R China 6.Univ Chinese Acad Sci, Beijing, Peoples R China 7.Guangzhou Marine Geol Survey, Natl Engn Res Ctr Gas Hydrate Explorat & Dev, Guangzhou, Peoples R China 8.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Peoples R China
推荐引用方式 GB/T 7714	Guo, Binbin,Shu, Yeqiang,Wang, Weiqiang,et al. Observations of Intermittent Seamount-Trapped Waves and Topographic Rossby Waves around the Slope of a Low-Latitude Deep Seamount[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2024,54(1):281-299.
APA	Guo, Binbin.,Shu, Yeqiang.,Wang, Weiqiang.,He, Gaowen.,Liang, Qianyong.,...&Su, Danyi.(2024).Observations of Intermittent Seamount-Trapped Waves and Topographic Rossby Waves around the Slope of a Low-Latitude Deep Seamount.JOURNAL OF PHYSICAL OCEANOGRAPHY,54(1),281-299.
MLA	Guo, Binbin,et al."Observations of Intermittent Seamount-Trapped Waves and Topographic Rossby Waves around the Slope of a Low-Latitude Deep Seamount".JOURNAL OF PHYSICAL OCEANOGRAPHY 54.1(2024):281-299.