globalchange  > 气候减缓与适应
DOI: 10.1029/2018JC013910
Scopus记录号: 2-s2.0-85052799557
论文题名:
Long-Range Radiation and Interference Pattern of Multisource M2 Internal Tides in the Philippine Sea
作者: Wang Y.; Xu Z.; Yin B.; Hou Y.; Chang H.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期:8
起始页码: 5091
结束页码: 5112
语种: 英语
英文关键词: dissipation ; interference ; internal tides ; numerical modeling ; western Pacific
英文摘要: Long-range radiation and interference of M2 internal tides from multiple sources in the Philippine Sea are examined by driving a high-resolution numerical model. The M2 internal tides are effectively generated around the boundary area, which includes the Luzon Strait, Ryukyu Island chain, Bonin Ridge, Mariana Arc, and Izu Ridge, favoring the occurrence of complex interference patterns. The local sources (mainly Daito Islands and Palau Ridge) inside the basin contribute to a small portion (~5%) of total energy but enhance the geographical inhomogeneity of the baroclinic field. The mode-1 and mode-2 M2 tidal beams from boundary sources radiate a long distance into the basin but exhibit different interference-modulated geography variations. A 2-D line source model characterizing interference can reproduce the general baroclinic field. Two notable interference cases are investigated: (1) the superposition of internal tides from Luzon Strait and Miyako Strait bifurcates into several southeastward beams, consistent with previous numerical simulations and altimeter measurements, and (2) the interference between Tokara Strait and Bonin Ridge exhibits a multiscale spatial pattern, which is modulated by the local generated energy and bathymetry features. Energetic dissipation occurs both near the boundary sources and in the basin. A locally dissipated fraction q of ~0.4 is estimated at the Luzon Strait and Bonin Ridge with continuous bathymetry features, while q of ~0.6 is estimated at the Ryukyu Island chain and Mariana Arc with discrete topographic variability. A lower locally dissipated fraction indicates a stronger energy flux radiating into the basin, where enhanced dissipation coincides closely with the interference-modulated flux field. ©2018. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113289
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作者单位: Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; University of Chinese Academy of Sciences, Beijing, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China

Recommended Citation:
Wang Y.,Xu Z.,Yin B.,et al. Long-Range Radiation and Interference Pattern of Multisource M2 Internal Tides in the Philippine Sea[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(8)
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