气候变化领域集成服务门户(CCPortal): Slope-Intensified Storm-Induced Near-Inertial Oscillations in the South China Sea

CCPortal

DOI	10.1029/2020JC016713
	Slope-Intensified Storm-Induced Near-Inertial Oscillations in the South China Sea
	Li R.; Chen C.; Dong W.; Beardsley R.C.; Wu Z.; Gong W.; Liu Y.; Liu T.; Xu D.
发表日期	2021
ISSN	21699275
卷号	126 期号:3
英文摘要	The South China Sea (SCS) is a region vulnerable to tropical cyclones (TCs). An array of moored current meters and meteorological buoys was deployed within major pathways of TCs across the slope of the northern shelf of the SCS from September 1, 2017 through September 30, 2018. Three TCs, Khanun, SonTinh, and Mangkhut, traversed by the storm-monitoring array in October 2017, July, and September 2018, respectively. Storm-generated near-inertial oscillations (NIOs) were observed at the moorings. These oscillations exhibited a slope-intensified feature regardless of the trajectories and intensities of TCs. In the stratified area, the NIOs was characterized by a two-layer structure, with large amplitudes in the mixed layer and beneath thermoclines. The phases of these oscillations changed rapidly through thermoclines. No significant nonlinear interactions were found between near-inertial and tidal currents. The low-frequency flow over the slope was characterized by a southwestward current in the along-shelf direction and an onshore current above the bottom boundary, and a weak offshore current near the bottom in the cross-shelf direction. The flow-induced negative vorticity was intensified during the TCs and appearances of mesoscale eddies. Slope-intensified NIOs can be explained by topographic inertial waves and energy trapping due to the negative vorticity of the slope flow. The strongest NIOs always occur during an adjustment period of the low-frequency flow to a pre-storm condition, suggesting a significant energy transfer from the low-frequency flow to the inertial motion. © 2021. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186437
作者单位	South China Sea Resource Exploitation and Protection Collaborative Innovation Center, School of Marine Sciences, Sun Yat-sen University, Guangzhou, China; South China Sea Marine Survey and Technology Center, State Ocean Administration, Guangzhou, China; Key Laboratory of Marine Environmental Survey Technology and Application, Ministry of Natural Resources, Guangzhou, China; School for Marine Science and Technology, University of Massachusetts-Dartmouth, New Bedford, MA, United States; School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, China; Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; School of Marine Sciences, Sun Yat-sen University, Guangzhou, China; Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
推荐引用方式 GB/T 7714	Li R.,Chen C.,Dong W.,et al. Slope-Intensified Storm-Induced Near-Inertial Oscillations in the South China Sea[J],2021,126(3).
APA	Li R..,Chen C..,Dong W..,Beardsley R.C..,Wu Z..,...&Xu D..(2021).Slope-Intensified Storm-Induced Near-Inertial Oscillations in the South China Sea.Journal of Geophysical Research: Oceans,126(3).
MLA	Li R.,et al."Slope-Intensified Storm-Induced Near-Inertial Oscillations in the South China Sea".Journal of Geophysical Research: Oceans 126.3(2021).