The role of Qiongzhou Strait in the seasonal variation of the South China Sea circulation | |
Shi, MC; Chen, CS; Xu, QC; Lin, HC; Liu, GM; Wang, H![]() ![]() | |
刊名 | JOURNAL OF PHYSICAL OCEANOGRAPHY
![]() |
2002 | |
卷号 | 32期号:1页码:103-121 |
关键词 | Stratified Tidal Rectification Finite-amplitude Banks Georges-bank Winter |
ISSN号 | 0022-3670 |
文献子类 | Article |
英文摘要 | 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.; 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. |
学科主题 | Oceanography |
语种 | 英语 |
WOS记录号 | WOS:000173257700005 |
公开日期 | 2010-12-22 |
内容类型 | 期刊论文 |
源URL | [http://ir.qdio.ac.cn/handle/337002/2531] ![]() |
专题 | 海洋研究所_海洋环流与波动重点实验室 |
作者单位 | 1.Univ Massachusetts Dartmouth, Sch Marine Sci & Technol, New Bedford, MA 02744 USA 2.Ocean Univ Qingdao, Dept Oceanog & Meteorol, Qingdao 266003, Peoples R China 3.Ocean Univ Qingdao, Inst Phys Oceanog, Qingdao 266003, Peoples R China 4.Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA 5.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China 6.SOA, Branch Bur S China Sea, Ctr Marine Survey Technol, Guangzhou, Peoples R China |
推荐引用方式 GB/T 7714 | Shi, MC,Chen, CS,Xu, QC,et al. The role of Qiongzhou Strait in the seasonal variation of the South China Sea circulation[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2002,32(1):103-121. |
APA | Shi, MC.,Chen, CS.,Xu, QC.,Lin, HC.,Liu, GM.,...&Yan, JH.(2002).The role of Qiongzhou Strait in the seasonal variation of the South China Sea circulation.JOURNAL OF PHYSICAL OCEANOGRAPHY,32(1),103-121. |
MLA | Shi, MC,et al."The role of Qiongzhou Strait in the seasonal variation of the South China Sea circulation".JOURNAL OF PHYSICAL OCEANOGRAPHY 32.1(2002):103-121. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论