Evolution characteristics of coherent and incoherent internal tides in the northern South China Sea

Zhai Rongwei; Chen Guiying; Shang Xiaodong

doi:10.3969/j.issn.0253-4193.2017.11.003

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Zhai Rongwei, Chen Guiying, Shang Xiaodong. Evolution characteristics of coherent and incoherent internal tides in the northern South China Sea[J]. Haiyang Xuebao, 2017, 39(11): 24-36. doi: 10.3969/j.issn.0253-4193.2017.11.003

Citation:

Zhai Rongwei, Chen Guiying, Shang Xiaodong. Evolution characteristics of coherent and incoherent internal tides in the northern South China Sea[J]. Haiyang Xuebao, 2017, 39(11): 24-36. doi: 10.3969/j.issn.0253-4193.2017.11.003

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Evolution characteristics of coherent and incoherent internal tides in the northern South China Sea

doi: 10.3969/j.issn.0253-4193.2017.11.003

1.
State Key Laboratory of Tropical Marine Environment, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;University of Chinese Academy of Sciences, Beijing 100049, China
2.
State Key Laboratory of Tropical Marine Environment, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China

Received Date: 2016-12-28
Rev Recd Date: 2017-03-24

Abstract

Abstract

Three sets of mooring Acoustic Doppler Current Profiler (ADCP) data across the continental slope and shelf area in the northern South China Sea are used to study the kinetic energy characteristics of diurnal and semidiurnal coherent and incoherent internal tides (ITs). Research shows that when diurnal ITs spread along continental slope and continental shelf, it is dominated by diurnal coherent ITs kinetic energy generation in the continental slope and the average diurnal coherent ITs kinetic energy generation rate is 2.32 J/(m³·s). It is dominated by diurnal coherent ITs kinetic energy dissipation in the continental shelf and the average diurnal coherent ITs kinetic energy dissipation rate is 0.44 J/(m³·s). The kinetic energy of diurnal incoherent ITs increases in both the continental slope and the continental shelf and the average diurnal incoherent ITs kinetic energy generation rate are 0.39 and 0.03 J/(m³·s). The kinetic energy characteristics of diurnal and semidiurnal coherent ITs are different in the continental slope and continental shelf. It showed that the kinetic energy of diurnal coherent ITs in the continental slope is significantly greater than the kinetic energy of diurnal coherent ITs in the continental shelf, but the kinetic energy of semidiurnal coherent ITs energy had no significant difference in the continental slope and continental shelf. The kinetic energy of diurnal and semidiurnal incoherent ITs in the continental shelf is greater than that in the continental slope.
- northern South China Sea,
- coherent internal tides,
- incoherent internal tides,
- internal tides

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