Seasonal characteristics of internal tides on the continental shelf in the northern South China Sea

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)

	Seasonal characteristics of internal tides on the continental shelf in the northern South China Sea
	Guo, P ; Fang, WD ; Liu, CJ ; Qiu, FW
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
	2012
卷号	117 页码:C04023
ISSN号	0148-0227
通讯作者	guopu@scsio.ac.cn
中文摘要	Three across-shelf Acoustic Doppler Current Profiler (ADCP) moorings were deployed on the continental shelf in the northern South China Sea in 2006 and 2007, in order to obtain time series of ocean currents. During each of the three observational periods, in spring, autumn, and winter seasons, the observation was sustained for at least 1 month. Conductivity-temperature-depth data were also collected in the vicinity of these ADCP moorings. The two diurnal baroclinic constituents (O-1 and K-1) are found to be more prominent than the semidiurnal baroclinic ones (M-2 and S-2) at each mooring site, which are different from the barotropic tides. The highest diurnal (semidiurnal) baroclinic kinetic energy density exceeded 10 (2.7) kJ/m(2) during the observational periods. In each observational period, the vertical structures of baroclinic tidal ellipses indicate mode-1 characteristics for O-1 and K-1, whereas some of the semidiurnal internal tides show mode-2 characteristics in autumn. Propagation directions of the diurnal and semidiurnal internal tides are basically across-shelf, and their phase speeds estimated from phase changes and buoyancy frequencies indicate deceleration of internal tides, when the internal tidal waves propagate from deeper shelf break to shallower shelf. The increased stratification in autumn is favorable for maintaining internal tidal waveform and preserving internal tidal energy, while the intensity of the internal tidal flow decreases significantly in winter.
学科主题	Oceanography
语种	英语
WOS记录号	WOS:000302857500001
公开日期	2013-08-28
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/10181]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Guo, P,Fang, WD,Liu, CJ,et al. Seasonal characteristics of internal tides on the continental shelf in the northern South China Sea[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2012,117:C04023.
APA	Guo, P,Fang, WD,Liu, CJ,&Qiu, FW.(2012).Seasonal characteristics of internal tides on the continental shelf in the northern South China Sea.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,117,C04023.
MLA	Guo, P,et al."Seasonal characteristics of internal tides on the continental shelf in the northern South China Sea".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 117(2012):C04023.