Optimal Initial Excitations of Decadal Modification of the Atlantic Meridional Overturning Circulation under the Prescribed Heat and Freshwater Flux Boundary Conditions
文献类型：期刊论文
| 作者 | Zu, Ziqing1; Mu, Mu2,3; Dijkstra, Henk A.4 |
| 刊名 | JOURNAL OF PHYSICAL OCEANOGRAPHY
 |
| 出版日期 | 2016-07-01 |
| 卷号 | 46期号:7页码:2029-2047 |
| 关键词 | Circulation Dynamics Meridional overturning circulation Nonlinear dynamics Variability Multidecadal variability |
| 英文摘要 | Within a three-dimensional ocean circulation model, the nonlinear optimal initial perturbations (NOIP) of sea surface salinity (SSS) and sea surface temperature (SST) to excite variability in the Atlantic meridional overturning circulation (AMOC) were obtained under prescribed heat and freshwater flux boundary conditions, using the conditional nonlinear optimal perturbation (CNOP) method. After 10 years, the optimal SSS and SST perturbations lead to reductions of the AMOC by 3.6 and 2.5 Sv (1 Sv = 10(6) m(3) s(-1)), respectively, followed by multidecadal oscillations with a period of about 50 years. During the first 30 years, nonlinear processes have an important influence on the AMOC strength: convection strengthens the AMOC during years 0-2, zonal density advection promotes the slowdown of the AMOC during years 7-20, and meridional density advection inhibits the slowdown of meridional velocities in the upper ocean during years 5-18. The linear optimal initial perturbation (LOIP) was also computed using the first singular vector (FSV) method. For SSS perturbations with an amplitude of 0.5 psu, the LOIP will cause an underestimation of the amplitude of the multidecadal AMOC variability by about 1 Sv, compared to that induced by the NOIP. This underestimation will become more significant as the amplitudes of SSS perturbations increase. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000379656100001 |
| 版本 | 出版稿 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/130957]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 作者单位 | 1.Natl Marine Environm Forecasting Ctr, Key Lab Res Marine Hazards Forecasting, Beijing, Peoples R China 2.Chinese Acad Sci, Key Lab Ocean Circulat & Wave, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao, Peoples R China 4.Univ Utrecht, Inst Marine & Atmospher Res Utrecht, Dept Phys & Astron, Utrecht, Netherlands |
| 推荐引用方式 GB/T 7714 | Zu, Ziqing,Mu, Mu,Dijkstra, Henk A.. Optimal Initial Excitations of Decadal Modification of the Atlantic Meridional Overturning Circulation under the Prescribed Heat and Freshwater Flux Boundary Conditions[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2016,46(7):2029-2047. |
| APA | Zu, Ziqing,Mu, Mu,&Dijkstra, Henk A..(2016).Optimal Initial Excitations of Decadal Modification of the Atlantic Meridional Overturning Circulation under the Prescribed Heat and Freshwater Flux Boundary Conditions.JOURNAL OF PHYSICAL OCEANOGRAPHY,46(7),2029-2047. |
| MLA | Zu, Ziqing,et al."Optimal Initial Excitations of Decadal Modification of the Atlantic Meridional Overturning Circulation under the Prescribed Heat and Freshwater Flux Boundary Conditions".JOURNAL OF PHYSICAL OCEANOGRAPHY 46.7(2016):2029-2047. |
入库方式： OAI收割
来源：海洋研究所
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