Journal of Tropical Oceanography >
Analysis of residual current during spring monsoon transition in the Beibu Gulf
Received date: 2008-11-26
Revised date: 2009-02-23
Online published: 2010-05-24
Supported by
国家908专项(908-01-ST09)
Current profile data of about 80 days were obtained by the submersible buoy measurement at two stations at the mouth of the Beibu Gulf during the spring monsoon transition in 2007. Using cross spectrum analysis, the structure of residual currents and the factors that influence the structure are analyzed, with the addition of QuikSCAT sea-surface wind data ob-tained from NASA Jet Propulsion Laboratory Physical Oceanography Distributed Active Archive Center, and sea-surface temperature data provided by NOAA National Climatic Data Center. The results are as follows. The northward component of the wind had oscillations with a period about 10 days during spring monsoon transition in the Beibu Gulf. The wind could generate the oscillation of the density field, which could lead to the variation of density current. The residual currents at Sta-tion M4 were mainly controlled by wind. Water at Station M4 was transported into the Beibu Gulf. The residual currents at Station M5 were very different between surface and bottom. The whole water column was affected directly by wind, while the surface layer was also affected by the variation of density current controlled by wind. So wind affected residual currents in two ways at Station M5.
Key words: Beibu Gulf; period of monsoon transition; residual current
LIU Tian-ran,WEI Hao,ZHAO Liang,YUAN Ye,LIU Zhi-yu . Analysis of residual current during spring monsoon transition in the Beibu Gulf[J]. Journal of Tropical Oceanography, 2010 , 29(3) : 10 -16 . DOI: 10.11978/j.issn.1009-5470.2010.03.010
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