| Revisiting Effect of Ocean Diapycnal Mixing on Atlantic Meridional Overturning Circulation Recovery in a Freshwater Perturbation Simulation |
| |
| 作者姓名： | 于雷 郜永祺 王会军 |
| |
| 作者单位： | Nansen-Zhu International Research Center Institute of Atmospheric Physics，Chinese Academy of Sciences，Nansen-Zhu International Research Center，Institute of Atmospheric Physics，Chinese Academy of Sciences，Nansen-Zhu International Research Center，Institute of Atmospheric Physics，Chinese Academy of Sciences，Nansen-Zhu International Research Center，Institute of Atmospheric Physics，Chinese Academy of Sciences，Beijing 100029 Graduate University of Chinese Academy of Sciences，Beijing 100049，Beijing 100029 Nansen Environmental and Remote Sensing Center/Bjerknes Centre for Climate Research，Bergen，Norway，Beijing 100029，Beijing 100029 Nansen Environmental and Remote Sensing Center/Bjerknes Centre for Climate Research，Bergen，Norway |
| |
| 基金项目： | Acknowledgements. This work was supported by the 100-Talent Program of CAS granted to Prof. Gao Yongqi and CAS Project ＂IAP OGCM Improvement and Coupling to AGCM and Ocean Carbon Cycle＂ （Grant No. KZCX2-YW-218）. The authors are also grateful to Dr. Odd Helge Ottera for providing the model outputs. |
| |
| 摘 要： | The effects of ocean density vertical stratification and related ocean mixing on the transient response of the Atlantic meridional overturning circulation （AMOC） are examined in a freshwater perturbation simulation using the Bergen Climate Model （BCM）. The results presented here are based on the model outputs of a previous freshwater experiment： a 300-year control integration （CTRL）, a freshwater integration （FW1） which started after 100 years of running the CTRL with an artificially and continuously threefold increase in the freshwater flux to the Greenland-Iceland-Norwegian （GIN） Seas and the Arctic Ocean throughout the following 150-year simulation. In FW1, the transient response of the AMOC exhibits an initial decreasing of about 6 Sv （1 Sv=106 m3 s^-1） over the first 50-year integration and followed a gradual recovery during the last 100-year integration. Our results show that the vertical density stratification as the crucial property of the interior ocean plays an important role for the transient responses of AMOC by regulating the convective and diapycnal mixings under the enhanced freshwater input to northern high latitudes in BCM in which the ocean diapycnal mixing is stratification-dependent. The possible mechanism is also investigated in this paper.
|
| 关 键 词： | 大西洋 循环 淡水 混合 |
| 收稿时间： | 9 February 2006 |
Revisiting effect of ocean diapycnal mixing on Atlantic meridional overturning circulation recovery in a freshwater perturbation simulation |
| |
| Lei?Yu,Yongqi?Gao,Huijun?Wang,Helge?Drange.Revisiting Effect of Ocean Diapycnal Mixing on Atlantic Meridional Overturning Circulation Recovery in a Freshwater Perturbation Simulation[J].Advances in Atmospheric Sciences,2008,25(4):597-609. |
| |
| Authors: | Lei Yu Yongqi Gao Huijun Wang Helge Drange |
| |
| Institution: | [1]Nansen-Zhu International Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 [2]Nansen Environmental and Remote Sensing Center//Bjerknes Centre for Climate Research, Bergen, Norway [3]Graduate University of Chinese Academy of Sciences, Beijing 100049 |
| |
| Abstract: | The effects of ocean density vertical stratification and related ocean mixing on the transient response of the Atlantic meridional overturning circulation (AMOC) are examined in a freshwater perturbation simula- tion using the Bergen Climate Model (BCM). The results presented here axe based on the model outputs of a previous freshwater experiment: a 300-year control integration (CTRL), a freshwater integration (FW1) which started after 100 years of running the CTRL with an artificially and continuously threefold increase in the freshwater flux to the Greenland-Iceland-Norwegian (GIN) Seas and the Arctic Ocean throughout the following 150-year simulation. In FW1, the transient response of the AMOC exhibits an initial decreasing of about 6 Sv (1 Sv=106m3 s-1) over the first 50-year integration and followed a gradual recovery during the last 100-year integration. Our results show that the vertical density stratification as the crucial property of the interior ocean plays an important role for the transient responses of AMOC by regulating the convective and diapycnal mixings under the enhanced freshwater input to northern high latitudes in BCM in which the ocean diapyenal mixing is stratification-dependent. The possible mechanism is also investigated in this paper. |
| |
| Keywords: | North Atlantic meridional overturning circulation enhanced freshwater forcing diapycnal mixing |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《大气科学进展》浏览原始摘要信息 |
| 点击此处可从《大气科学进展》下载免费的PDF全文 |
