IOCAS-IR  > 海洋环流与波动重点实验室
Optimal Initial Excitations of Decadal Modification of the Atlantic Meridional Overturning Circulation under the Prescribed Heat and Freshwater Flux Boundary Conditions
Zu, Ziqing1; Mu, Mu2,3; Dijkstra, Henk A.4
2016-07-01
Source PublicationJOURNAL OF PHYSICAL OCEANOGRAPHY
Volume46Issue:7Pages:2029-2047
SubtypeArticle
AbstractWithin 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.
KeywordCirculation Dynamics Meridional Overturning Circulation Nonlinear Dynamics Variability Multidecadal Variability
DOI10.1175/JPO-D-15-0100.1
Indexed BySCI
Language英语
WOS IDWOS:000379656100001
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/130957
Collection海洋环流与波动重点实验室
Affiliation1.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
Recommended Citation
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.
Files in This Item:
File Name/Size DocType Version Access License
Optimal Initial Exci(1818KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zu, Ziqing]'s Articles
[Mu, Mu]'s Articles
[Dijkstra, Henk A.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zu, Ziqing]'s Articles
[Mu, Mu]'s Articles
[Dijkstra, Henk A.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zu, Ziqing]'s Articles
[Mu, Mu]'s Articles
[Dijkstra, Henk A.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Optimal Initial Excitations of Decadal Modification of the Atlantic Meridional Overturning Circulation under the Prescribed Heat and Freshwater Flux Boundary Conditions.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.