The numerical investigation of seasonal variation of the cold water mass in the Beibu Gulf and its mechanisms

CHEN Zhenhua; QIAO Fangli; XIA Changshui; WANG Gang

doi:10.1007/s13131-015-0595-x

Volume 34 Issue 1

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Article Navigation > Acta Oceanologica Sinica > 2015 > 34(1): 44-54

CHEN Zhenhua, QIAO Fangli, XIA Changshui, WANG Gang. The numerical investigation of seasonal variation of the cold water mass in the Beibu Gulf and its mechanisms[J]. Acta Oceanologica Sinica, 2015, 34(1): 44-54. doi: 10.1007/s13131-015-0595-x

Citation:

CHEN Zhenhua, QIAO Fangli, XIA Changshui, WANG Gang. The numerical investigation of seasonal variation of the cold water mass in the Beibu Gulf and its mechanisms[J]. Acta Oceanologica Sinica, 2015, 34(1): 44-54. doi: 10.1007/s13131-015-0595-x

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The numerical investigation of seasonal variation of the cold water mass in the Beibu Gulf and its mechanisms

doi: 10.1007/s13131-015-0595-x

1.
College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China;The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of Marine Science and Numerical Modeling (MASNUM), State Oceanic Administration, Qingdao 266061, China
2.
The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of Marine Science and Numerical Modeling (MASNUM), State Oceanic Administration, Qingdao 266061, China

Received Date: 2014-05-26
Rev Recd Date: 2014-08-11

Abstract

Abstract

A wave-tide-circulation coupled model based on the Princeton Ocean Model is established to explore the seasonal variation of the cold water mass in the Beibu Gulf and its mechanisms. The results show that the cold water mass starts forming in March, reaches the maximum strength during June and July, and fades away since October. Strong mixing in winter transports the cold water from sea surface to bottom. The cold water mass remains in the bottom layer as the thermocline strengthens during spring, except for the shallow water where the themocline is broken by strong tidal mixing, which gradually separate the cold water mass from its surrounding warm water. Further analysis on the ocean current and stream function confirms that the cold water mass in the Beibu Gulf is locally developed, with an anticlockwise circulation caused by a strong temperature gradient. Sensitivity experiments reveal that the cold water mass is controlled by the sea surface heat flux, while the terrain and tidal mixing also play important roles.
- Beibu Gulf,
- cold water mass,
- seasonal variation,
- wave-tide-circulation coupled model

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References

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