Estimating Four-Dimensional Internal Wave Spectrum in the Northern South China Sea

doi:10.1175/JTECH-D-18-0046.1

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Estimating Four-Dimensional Internal Wave Spectrum in the Northern South China Sea
	Tian, Jiwei 4; Sun, Hui 4; Zhao, Wei 4; Yang, Qingxuan 4; Cai, Shuqun 2,3; Liang, Xinfeng 5
刊名	JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY
	2019
卷号	36 期号:7 页码:1199
关键词	Internal waves Algorithms Spectral analysis models distribution
ISSN号	0739-0572
DOI	10.1175/JTECH-D-18-0046.1
英文摘要	Internal waves can transfer energy from large-scale to microscale processes; however, the spectra of these waves remain poorly known. A method that combines modal harmonic decomposition and maximum-likelihood method is proposed in this study to estimate four-dimensional internal wave spectrum using limited mooring observations. Using this method, a four-dimensional internal wave spectrum was obtained for the first time based on the mooring measurements collected during the South China Sea (SCS) Internal Wave Experiment in July 2014. The spectrum was then validated by comparing with the spectrum based on Fourier analysis and with the modified Garrett-Munk internal wave spectrum, respectively. The power of the internal wave spectrum decreased obviously with increasing frequency and wavenumber, with a falloff rate of omega(-2) beyond tidal frequencies, and with falloff rates of kh-2 and kz-2.5 for horizontal and vertical wavenumbers, respectively. In addition, at a fixed frequency and vertical wavenumber, the propagation direction and phase speed of internal waves can be obtained through the four-dimensional spectrum. In summary, we verified the feasibility of estimating four-dimensional internal wave spectrum using limited mooring observations in this study, and the method we proposed should be applicable to other regions where such mooring observations are available.
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/17706]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
作者单位	1.Univ S Florida, Coll Marine Sci, St Petersburg, FL 33701 USA 2.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Qingdao, Shandong, Peoples R China 4.Ocean Univ China, Collaborat Innovat Ctr Marine Sci & Technol, Phys Oceanog Lab, Qingdao, Shandong, Peoples R China 5.Chinese Acad Sci, Inst South China Sea Ecol & Environm Engn, Guangzhou, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Tian, Jiwei,Sun, Hui,Zhao, Wei,et al. Estimating Four-Dimensional Internal Wave Spectrum in the Northern South China Sea[J]. JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY,2019,36(7):1199, 1216.
APA	Tian, Jiwei,Sun, Hui,Zhao, Wei,Yang, Qingxuan,Cai, Shuqun,&Liang, Xinfeng.(2019).Estimating Four-Dimensional Internal Wave Spectrum in the Northern South China Sea.JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY,36(7),1199.
MLA	Tian, Jiwei,et al."Estimating Four-Dimensional Internal Wave Spectrum in the Northern South China Sea".JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY 36.7(2019):1199.