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学科主题: Oceanography
题名: The role of Qiongzhou Strait in the seasonal variation of the South China Sea circulation
作者: Shi, MC ; Chen, CS ; Xu, QC ; Lin, HC ; Liu, GM ; Wang, H ; Wang, F ; Yan, JH
通讯作者: c1chen@umassd.edu
刊名: JOURNAL OF PHYSICAL OCEANOGRAPHY
发表日期: 2002-01-01
卷: 32, 期:1, 页:103-121
收录类别: sci
部门归属: Univ Massachusetts Dartmouth, Sch Marine Sci & Technol, New Bedford, MA 02744 USA; Ocean Univ Qingdao, Dept Oceanog & Meteorol, Qingdao 266003, Peoples R China; Ocean Univ Qingdao, Inst Phys Oceanog, Qingdao 266003, Peoples R China; Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA; Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China; SOA, Branch Bur S China Sea, Ctr Marine Survey Technol, Guangzhou, Peoples R China
项目归属: LED
摘要: An analysis of the water level and current data taken in Qiongzhou Strait in the South China Sea (SCS) over the last 37 years (1963 to 1999) was made to examine the characteristics of tidal waves and residual flow through the strait and their roles in the seasonal variation of the SCS circulation. The observations reveal that Qiongzhou Strait is an area where opposing tidal waves interact and a source of water transport to the Gulf of Beibu (Gulf of Tonkin), SCS. A year-round westward mean flow with a maximum speed of 10-40 cm s(-1) is found in Qiongzhou Strait. This accounts for water transport of 0.2-0.4 Sv and 0.1-0.2 Sv into the Gulf of Beibu in winter-spring and summer-autumn, respectively. The outflow from Qiongzhou Strait may cause up to 44% of the gulf water to be refreshed each season, suggesting that it has a significant impact on the seasonal circulation in the Gulf of Beibu. This finding is in contrast to our current understanding that the seasonal circulation patterns in the South China Sea are primarily driven by seasonal winds. Several numerical experiments were conducted to examine the physical mechanisms responsible for the formation of the westward mean flow in Qiongzhou Strait. The model provides a reasonable simulation of semidiurnal and diurnal tidal waves in the strait and the predicted residual flow generally agrees with the observed mean flow. An analysis of the momentum equations indicates that the strong westward flow is driven mainly by tidal rectification over variable bottom topography. Both observations and modeling suggest that the coastal physical processes associated with tidal rectification and buoyancy input must be taken into account when the mass balance of the SCS circulation is investigated, especially for the regional circulation in the Gulf of Beibu.
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/5517
Appears in Collections:热带海洋环境动力实验室(LTO)_期刊论文

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Recommended Citation:
Shi, MC; Chen, CS; Xu, QC; Lin, HC; Liu, GM; Wang, H; Wang, F; Yan, JH.The role of Qiongzhou Strait in the seasonal variation of the South China Sea circulation,JOURNAL OF PHYSICAL OCEANOGRAPHY,2002,32(1):103-121
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