Linkage between the Pacific Decadal Oscillation and the low frequency variability of the Pacific Subtropical Cell

被引:15
作者
Hong, Lingya [1 ]
Zhang, Liping [2 ,3 ]
Chen, Zhaohui [1 ]
Wu, Lixin [1 ]
机构
[1] Ocean Univ China, Qingdao Collaborat Innovat Ctr Marine Sci & Techn, Phys Oceanog Lab, Qingdao, Peoples R China
[2] Princeton Univ, Princeton, NJ 08544 USA
[3] NOAA, Geophys Fluid Dynam Lab, Princeton, NJ USA
基金
中国国家自然科学基金;
关键词
SEA-SURFACE TEMPERATURE; MERIDIONAL OVERTURNING CIRCULATION; NORTH PACIFIC; ATMOSPHERIC RESPONSE; SST ANOMALIES; CLIMATE VARIABILITY; OCEAN; THERMOCLINE; REANALYSIS; DEPENDENCE;
D O I
10.1002/2013JC009650
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
The decadal variability of Pacific Subtropical Cell (STC) and its linkages with the Pacific Decadal Oscillation (PDO) are investigated in the present study based on a Simple Ocean Data Assimilation (SODA 2.2.4). It is found that, on decadal time scales, the western boundary and interior pycnocline transports are anticorrelated and the variation of the interior component is more significant, which is consistent with previous studies. The decadal variability of STC in the Northern Hemisphere is found to be strongly associated with PDO. Associated with a positive (negative) phase of PDO, the relaxation (acceleration) of the northeast trades slows down (spins up) the STC within a few years through baroclinic adjustment in conjunction with the subduction of the cold (warm) mixed-layer anomalies in the extratropics. The cold (warm) water is then injected into the thermocline and advected further southwestward to the tropics along the isopycnal surfaces, leading to the slowdown (spin-up) of STC due to zonal pressure gradient change at low latitude. Along with the STC weakening (strengthening), a significant warming (cold) anomaly appears in the tropics and it is advected to the midlatitude by the Kuroshio and North Pacific currents, thus feeding back to the atmosphere over the North Pacific. In contrast to the Northern Hemisphere, it is found the STC in the south only passively responds to the PDO. The mechanism found here highlights the role of the STC advection of extra-tropical anomalies to the tropics and horizontal gyre advection of the tropical anomalies to the extratropics in decadal variability of the STC and PDO.
引用
收藏
页码:3464 / 3477
页数:14
相关论文
共 49 条
[1]  
Bjerknes J., 1964, ADV GEOPHYS, V10, P1, DOI [10.1016/S0065-2687(08)60005-9, DOI 10.1016/S0065-2687(08)60005-9]
[2]   A reanalysis of ocean climate using Simple Ocean Data Assimilation (SODA) [J].
Carton, James A. ;
Giese, Benjamin S. .
MONTHLY WEATHER REVIEW, 2008, 136 (08) :2999-3017
[3]   Dynamics of the seasonal variation of the North Equatorial Current bifurcation [J].
Chen, Zhaohui ;
Wu, Lixin .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2011, 116
[4]   The Twentieth Century Reanalysis Project [J].
Compo, G. P. ;
Whitaker, J. S. ;
Sardeshmukh, P. D. ;
Matsui, N. ;
Allan, R. J. ;
Yin, X. ;
Gleason, B. E., Jr. ;
Vose, R. S. ;
Rutledge, G. ;
Bessemoulin, P. ;
Broennimann, S. ;
Brunet, M. ;
Crouthamel, R. I. ;
Grant, A. N. ;
Groisman, P. Y. ;
Jones, P. D. ;
Kruk, M. C. ;
Kruger, A. C. ;
Marshall, G. J. ;
Maugeri, M. ;
Mok, H. Y. ;
Nordli, O. ;
Ross, T. F. ;
Trigo, R. M. ;
Wang, X. L. ;
Woodruff, S. D. ;
Worley, S. J. .
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2011, 137 (654) :1-28
[5]   Observed influence of North Pacific SST anomalies on the atmospheric circulation [J].
Frankignoul, Claude ;
Sennechael, Nathalie .
JOURNAL OF CLIMATE, 2007, 20 (03) :592-606
[6]   Modulation of Atmospheric Response to North Pacific SST Anomalies under Global Warming: A Statistical Assessment [J].
Gan, Bolan ;
Wu, Lixin .
JOURNAL OF CLIMATE, 2012, 25 (19) :6554-6566
[7]   El Nino variability in simple ocean data assimilation (SODA), 1871-2008 [J].
Giese, Benjamin S. ;
Ray, Sulagna .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2011, 116
[8]   Interdecadal climate fluctuations that depend on exchanges between the tropics and extratropics [J].
Gu, DF ;
Philander, SGH .
SCIENCE, 1997, 275 (5301) :805-807
[9]  
Huang RuiXin., 2010, Ocean circulation: wind-driven and thermohaline processes
[10]  
Johnson GC, 1999, J PHYS OCEANOGR, V29, P3073, DOI 10.1175/1520-0485(1999)029<3073:IPFFTS>2.0.CO