Intensified Deep Ocean Variability Induced by Topographic Rossby Waves at the Pacific Yap-Mariana Junction

doi:10.1029/2019JC015490

IOCAS-IR > 海洋环流与波动重点实验室

	Intensified Deep Ocean Variability Induced by Topographic Rossby Waves at the Pacific Yap-Mariana Junction
	Ma, Qiang1,2 ; Wang, Fan1,2,3 ; Wang, Jianing1,3 ; Lyu, Yilong1,2
	2019-11-30
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN	2169-9275
页码	15
通讯作者	Wang, Fan([email protected]) ; Wang, Jianing([email protected])
摘要	In a deep channel at the Pacific Yap-Mariana Junction, intensified variability of flow and isotherm displacements over 3,000-4,600 m is revealed by two separate observations: the recent one during 2014-2016 and the two 20 years ago during 1996-1998. Observed velocity and isotherm displacements can reach 45 cm s(-1) and similar to 600 m at 4,200 m, respectively. Such intensified variability is demonstrated to arise from topographic Rossby waves (TRWs) since vertical profiles of observed currents reasonably conform to TRW features of hyperbolic intensification with depth and highly vertical coherence in phase. Mercator Ocean model outputs reproduce observed TRWs and are used to discuss their energy sources. Both the energetic surface eddy moving across rough topography and mixed barotropic-baroclinic instability of the background flow appear to be the candidates to generate TRWs. Plain Language Summary Traditionally, the deep sea has been viewed as quiet, with weak horizontal and vertical motions; however, results from three subsurface moorings in a deep channel at the Pacific Yap-Mariana Junction show that the fluctuations of deep current speed and isotherm displacement intensify significantly with increasing depth. The observed velocity and isotherm displacements can reach 45 cm s(-1) and similar to 600 m at 4,200 m, comparable to that in the upper ocean. We interpret these deep fluctuations as topographic Rossby waves (TRWs) since vertical distributions of observed velocities obey TRW features of hyperbolic intensification with depth and highly vertical coherence in phase. With the aid of Mercator Ocean model outputs, the TRWs are deemed to arise from the energetic surface eddy moving across the rough topography and barotropic and baroclinic instabilities of the background flow.
关键词	Moored Observations Intensified Fluctuation Deep Ocean Topographic Rossby Wave
DOI	10.1029/2019JC015490
收录类别	SCI
语种	英语
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22000000]###3399; National Natural Science Foundation of China[41776022]###1816; National Natural Science Foundation of China[41730534]###106; National Natural Science Foundation of China[41421005]###312; National Natural Science Foundation of China[U1406401]###311; China Ocean Mineral Resources Research and Development Association Program[DY135-E2-3-02]###3400; Scientific and Technological Innovation Project by Qingdao National Laboratory for Marine Science and Technology[2016ASKJ12]###3401; National Program on Global Change and Air-Sea Interaction[GASI-IPOVAI-01-01]###109; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22000000]; National Natural Science Foundation of China[41776022]; National Natural Science Foundation of China[41730534]; National Natural Science Foundation of China[41421005]; National Natural Science Foundation of China[U1406401]; China Ocean Mineral Resources Research and Development Association Program[DY135-E2-3-02]; Scientific and Technological Innovation Project by Qingdao National Laboratory for Marine Science and Technology[2016ASKJ12]; National Program on Global Change and Air-Sea Interaction[GASI-IPOVAI-01-01]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000499619700001
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/163757
专题	海洋环流与波动重点实验室
通讯作者	Wang, Fan; Wang, Jianing
作者单位	1.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Inst Oceanol, Ctr Ocean Mega Sci, Qingdao, Shandong, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao, Shandong, 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	Ma, Qiang,Wang, Fan,Wang, Jianing,et al. Intensified Deep Ocean Variability Induced by Topographic Rossby Waves at the Pacific Yap-Mariana Junction[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2019:15.
APA	Ma, Qiang,Wang, Fan,Wang, Jianing,&Lyu, Yilong.(2019).Intensified Deep Ocean Variability Induced by Topographic Rossby Waves at the Pacific Yap-Mariana Junction.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,15.
MLA	Ma, Qiang,et al."Intensified Deep Ocean Variability Induced by Topographic Rossby Waves at the Pacific Yap-Mariana Junction".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS (2019):15.

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