Internal Lee Wave Generation from Geostrophic Flow in the Northwestern Pacific Ocean

doi:10.1175/JPO-D-23-0035.1

IOCAS-IR > 海洋环流与波动重点实验室

	Internal Lee Wave Generation from Geostrophic Flow in the Northwestern Pacific Ocean
	Li, Ji 1,3,4; Xu, Zhenhua 1,2,3; Hao, Zhanjiu 1,3; You, Jia1,3 ; Zhang, Peiwen1,2 ; Yin, Baoshu 1,2,3,4
	2023-11-01
发表期刊	JOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN	0022-3670
卷号	53 期号:11 页码:2633-2650
通讯作者	Xu, Zhenhua(xuzhenhua@qdio.ac.cn)
摘要	Among the global mapping of lee wave generation, a missing piece exists in the northwestern Pacific Ocean (NPO), which features complex topographies and energetic circulations. This study applies Bell's theory to estimate and map internal lee waves generated by geostrophic flows in the NPO using Mercator Ocean reanalysis data and the full topo-graphic spectra obtained from the latest synthetic bathymetry product. Unlike the dominant contributions from abyssal hills in the Southern Ocean, multiple topographies, including ridges, rises, and continental margins, result in an inhomoge-neous lee wave generation with multiple hotspots in the NPO. The generation rate is generally higher in the Philippine basin and lower in the central Pacific seamounts. Over ridges, the rough topography creates a high potential for triggering lee waves. Over rises and continental margins, the stronger currents at the shallow depths are favorable for lee wave gener-ation. In the Kuroshio extension region, the rough topography and strong currents cause the strongest lee wave generation, with an energy flux reaching 100 mW m22. By mean-eddy decomposition, it is found that the lee wave hotspots contrib-uted by mean flow are concentrated in specific regions, while those by geostrophic eddies are widely distributed. Geo-strophic eddies are the primary contributor to lee wave generation, which account for 74.6% of the total energy transferred from geostrophic flow to lee waves. This study also reveals that tides suppress the lee wave generation by 14%, and geo-strophic flow can cause an asymmetric generation of internal tides.
关键词	Eddies Internal waves Mountain waves Small scale processes Topographic effects
DOI	10.1175/JPO-D-23-0035.1
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China ; Strategic Pioneering Research Program of CAS[92058202] ; Strategic Pioneering Research Program of CAS[XDB42000000] ; Strategic Pioneering Research Program of CAS[92258301] ; Strategic Pioneering Research Program of CAS[XDA22050202] ; Scientific and Technological Innovation Project by Laoshan Laboratory[LSKJ202202502]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001101163500001
出版者	AMER METEOROLOGICAL SOC
WOS关键词	SMALL-SCALE TOPOGRAPHY ; STRATIFIED FLOW ; GLOBAL BATHYMETRY ; DISSIPATION ; CIRCULATION ; ENERGY ; TIDE ; IMPACT ; RIDGE ; MORPHOLOGY
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/183949
专题	海洋环流与波动重点实验室海洋生态与环境科学重点实验室
通讯作者	Xu, Zhenhua
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Sci, CAS Engn Lab Marine Ranching, Inst Oceanol, Qingdao, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Li, Ji,Xu, Zhenhua,Hao, Zhanjiu,et al. Internal Lee Wave Generation from Geostrophic Flow in the Northwestern Pacific Ocean[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2023,53(11):2633-2650.
APA	Li, Ji,Xu, Zhenhua,Hao, Zhanjiu,You, Jia,Zhang, Peiwen,&Yin, Baoshu.(2023).Internal Lee Wave Generation from Geostrophic Flow in the Northwestern Pacific Ocean.JOURNAL OF PHYSICAL OCEANOGRAPHY,53(11),2633-2650.
MLA	Li, Ji,et al."Internal Lee Wave Generation from Geostrophic Flow in the Northwestern Pacific Ocean".JOURNAL OF PHYSICAL OCEANOGRAPHY 53.11(2023):2633-2650.

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