Observation of Near-Inertial Oscillations Induced by Energy Transformation during Typhoons

doi:10.3390/en12010099

IOCAS-IR > 海洋环流与波动重点实验室

	Observation of Near-Inertial Oscillations Induced by Energy Transformation during Typhoons
	Hou, Huaqian 1,2; Yu, Fei 1; Nan, Feng 1; Yang, Bing1 ; Guan, Shoude 1; Zhang, Yuanzhi 3
	2019
发表期刊	ENERGIES
ISSN	1996-1073
卷号	12 期号:1 页码:19
通讯作者	Yu, Fei(yuf@qdio.ac.cn) ; Zhang, Yuanzhi(yuanzhizhang@cuhk.edu.hk)
摘要	Three typhoon events were selected to examine the impact of energy transformation on near-inertial oscillations (NIOs) using observations from a subsurface mooring, which was deployed at 125 degrees E and 18 degrees N on 26 September 2014 and recovered on 11 January 2016. Almost 16 months of continuous observations were undertaken, and three energetic NIO events were recorded, all generated by passing typhoons. The peak frequencies of these NIOs, 0.91 times of the local inertial frequency f, were all lower than the local inertial frequency f. The estimated vertical group velocities (C-gz) of the three NIO events were 11.9, 7.4, and 23.0 m d(-1), and were relatively small compared with observations from other oceans (i.e., 100 m d(-1)). The directions of the horizontal near-inertial currents changed four or five times between the depths of 40 and 800 m in all three NIO events, implying that typhoons in the northwest Pacific usually generate high-mode NIOs. The NIO currents were further decomposed by performing an empirical orthogonal function (EOF) analysis. The first and second EOF modes dominated the NIOs during each typhoon, accounting for more than 50% of the total variance. The peak frequencies of the first two EOF modes were less than f, but those of the third and fourth modes were higher than f. The frequencies of all the modes during non-typhoon periods were more than f. Our analysis indicates that the relatively small downward group velocity was caused by the frequent direction changes of the near-inertial currents with depth.
关键词	Near-inertial kinetic energy vertical group velocity near-inertial oscillations energy transformation
DOI	10.3390/en12010099
收录类别	SCI
语种	英语
资助项目	Global Change and Air Sea Interaction Project[GASI-02-PAC-STMSspr] ; National Natural Science Foundation of China[41421005] ; National Natural Science Foundation of China[U1406401] ; National Key R&D Program of China[2016YFC1402003] ; National Key R&D Program of China[2017YFC1403400] ; National Key R&D Program of China[2017YFC1403400] ; National Key R&D Program of China[2016YFC1402003] ; National Natural Science Foundation of China[U1406401] ; National Natural Science Foundation of China[41421005] ; Global Change and Air Sea Interaction Project[GASI-02-PAC-STMSspr]
WOS研究方向	Energy & Fuels
WOS类目	Energy & Fuels
WOS记录号	WOS:000460665000099
出版者	MDPI
引用统计	被引频次：13[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/337002/155280
专题	海洋环流与波动重点实验室
通讯作者	Yu, Fei; Zhang, Yuanzhi
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Wave Studies, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Nanjing Univ Informat Sci & Technol, Nanjing 210044, Jiangsu, 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	Hou, Huaqian,Yu, Fei,Nan, Feng,et al. Observation of Near-Inertial Oscillations Induced by Energy Transformation during Typhoons[J]. ENERGIES,2019,12(1):19.
APA	Hou, Huaqian,Yu, Fei,Nan, Feng,Yang, Bing,Guan, Shoude,&Zhang, Yuanzhi.(2019).Observation of Near-Inertial Oscillations Induced by Energy Transformation during Typhoons.ENERGIES,12(1),19.
MLA	Hou, Huaqian,et al."Observation of Near-Inertial Oscillations Induced by Energy Transformation during Typhoons".ENERGIES 12.1(2019):19.