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	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
发表期刊	JOURNAL OF PHYSICAL OCEANOGRAPHY
卷号	46期号:7页码:2029-2047
文章类型	Article
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.
关键词	Circulation Dynamics Meridional Overturning Circulation Nonlinear Dynamics Variability Multidecadal Variability
DOI	10.1175/JPO-D-15-0100.1
收录类别	SCI
语种	英语
WOS记录号	WOS:000379656100001
引用统计	被引频次：7[WOS]   [WOS记录]     [WOS相关记录]
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.qdio.ac.cn/handle/337002/130957
专题	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.

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