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Volume 25 Issue 3
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Article Navigation >  Haiyang Xuebao  > 2003  >  25(3): 8-19
ZHAO Shan-shan, YANG Xiu-qun, ZHU Yi-min. Numerical simulation of interannual and interdecadal SST variabilities in the tropical Atlantic with an intermediate ocean model[J]. Haiyang Xuebao, 2003, 25(3): 8-19.
Citation: ZHAO Shan-shan, YANG Xiu-qun, ZHU Yi-min. Numerical simulation of interannual and interdecadal SST variabilities in the tropical Atlantic with an intermediate ocean model[J]. Haiyang Xuebao, 2003, 25(3): 8-19.
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Numerical simulation of interannual and interdecadal SST variabilities in the tropical Atlantic with an intermediate ocean model

  • Global Ocean-Atmosphere Interaction Laboratory, Department of Atmospheric Sciences, Nanjing University, Nanjing 210093, China

  • Received Date: 2002-05-24
  • Rev Recd Date: 2002-09-18
    Abstract
  • An investigation for understanding relative contributions of the surface wind stress forcing and the heat flux forcing to the upper ocean variability in the tropical Atlantic is presented,with an intermediate ocean model(IOM) developed in Hawaii University.The model was integrated for 41 a as a control experiment with both anomalous wind stresses and anomalous heat fluxes.Two parallel sensitive experiments without forcing of either the wind stress anomalies or the surface heat flux anomalies were conducted.The relative importance of the two forcing factors in generating the upper ocean variabilities for the sea surface temperature(SST) and the thermocline depth was examined.This model successfully simulates the SST variations in the tropical Atlantic with a weak ENSO-like mode on the interannual time scale and a north-south dipole mode on the interdecadal time scale.The interannual SST variability is determined by both forcing factors.The heat flux forcing has more contribution outside the equator while the wind stress forcing has contribution mainly near the equator.The interdecadal dipole mode is largely controlled by the heat flux forcing.Variations of the thermocline depth in the Atlantic are dominated by the wind stress anomalies,and the heat flux forcing has nearly no contribution.
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