期刊
GEOPHYSICAL RESEARCH LETTERS
卷 50, 期 4, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2022GL099889
关键词
near-inertial waves; pure inertial waves; low-frequency flows; nonlinear triadic interactions; seamount; flow-topography interaction
Mooring data collected at a flat-topped seamount suggest the generation of pure inertial waves (PIWs) by low-frequency flows over large-scale topography. Energetic PIWs were observed near the seafloor at the edge of the summit. These waves could be associated with low-frequency flows. A nonhydrostatic model was used to show that the observed PIWs are most likely internal wave beams generated by low-frequency flows over the seamount. Two types of PIWs were identified: one that travels horizontally and one that propagates upward with a Doppler-shifted frequency.
Mooring data collected at a flat-topped seamount suggest the generation of pure inertial waves (PIWs; waves with a dominant frequency equal to the local inertial frequency f) by low-frequency flows over large-scale topography. Energetic PIWs were observed within a narrow depth range (similar to 100 m) near the seafloor at the edge of the summit. These waves could be associated with low-frequency flows. A two-dimensional nonhydrostatic model was used to show that the observed PIWs are most likely internal wave beams generated by low-frequency flows over the seamount. Two types of PIWs were identified via observation and model. The first is a PIW that can only travel horizontally. The other propagates upward, with super-inertial intrinsic frequency that is Doppler-shifted by the flows to f. Nonlinear triadic interactions among waves with the frequencies [0, f, f] may transfer energy from mean flows to PIWs, promoting energy decay of geostrophic flows over large-scale topography.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据