Effect of opening the Drake Passage on the oceanic general circulation: A box model study | |
Shao, QiuLi1,3; Chen, XianYao1,3; Huang, RuiXin2 | |
刊名 | SCIENCE CHINA-EARTH SCIENCES
![]() |
2013-09 | |
卷号 | 56期号:9页码:1588-1598 |
关键词 | Drake Passage Antarctic Bottom Water North Atlantic Deep Water box model wind stress thermal front |
ISSN号 | 1674-7313 |
DOI | 10.1007/s11430-012-4571-4 |
英文摘要 | The impacts of opening the Drake Passage (DP) on the oceanic general circulation are examined. When the DP is open, wind stress at mid- and high latitudes gives rise to a wind-driven gyre, which induces a meridional heat exchange between mid- and high latitudes in the Southern Ocean. After the opening of the DP, the Antarctic Circumpolar Current (ACC) forms and its associated strong temperature front blocks the heat transport from mid-latitudes to high latitudes. A simple box model is formulated, in which the effects of the wind stress (for the case of DP closed) and the thermal front (for the case of DP open) on the variability of Antarctic Bottom Water (AABW) and North Atlantic Deep Water (NADW) are explored. The sensitivity experiments demonstrate that: (1) When the DP is closed, the enhancement of the wind-driven gyre leads to the decline of AABW formation in the Southern Ocean and the increase of NADW formation in the North Atlantic. As a result, water in high latitudes of the Southern Ocean becomes warmer, so does the bottom water of global ocean. (2) When the DP is open, there is no formation of AABW until the intensity of thermal front along ACC exceeds a threshold value (it is 4.03A degrees C in our model). Before the formation of AABW, temperature in most of the oceans is higher than that after the formation of AABW, which usually leads to the cooling of high latitudes of the Southern Hemisphere and the bottom water in global ocean. When the strength of the thermal front is lower than the critical value, there is no AABW formation, and temperature in most of the oceans is slightly higher. These results demonstrate that during the opening of the DP, changes in wind stress and the formation of the thermal front in the Southern Ocean can substantially affect the formation of AABW and NADW, thus changing the state of meridional overturning circulation in the global ocean. |
资助项目 | National Natural Science Foundation of China[41176029] |
WOS研究方向 | Geology |
语种 | 英语 |
出版者 | SCIENCE PRESS |
WOS记录号 | WOS:000323746500013 |
内容类型 | 期刊论文 |
源URL | [http://ir.fio.com.cn/handle/2SI8HI0U/3936] ![]() |
专题 | 自然资源部第一海洋研究所 |
作者单位 | 1.Key Laboratory of Data Analysis and Applications, State Oceanic Administration, Qingdao, 266061, China; 2.Woods Hole Oceanographic Institution, Woods Hole, MA, 02543-1050, United States; 3.The First Institute of Oceanography, State Oceanic Administration, Qingdao, 266061, China |
推荐引用方式 GB/T 7714 | Shao, QiuLi,Chen, XianYao,Huang, RuiXin. Effect of opening the Drake Passage on the oceanic general circulation: A box model study[J]. SCIENCE CHINA-EARTH SCIENCES,2013,56(9):1588-1598. |
APA | Shao, QiuLi,Chen, XianYao,&Huang, RuiXin.(2013).Effect of opening the Drake Passage on the oceanic general circulation: A box model study.SCIENCE CHINA-EARTH SCIENCES,56(9),1588-1598. |
MLA | Shao, QiuLi,et al."Effect of opening the Drake Passage on the oceanic general circulation: A box model study".SCIENCE CHINA-EARTH SCIENCES 56.9(2013):1588-1598. |
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