Response of a Coupled OceanIceAtmosphere Model
to Data Assimilation in the Tropical Zone of the Pacific Ocean

K. P. Belyaev^a, N. P. Tuchkova^b, and U. Cubash^c

^a Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia

E-mail: kb@sail.msk.ru

^b Computer Center, Russian Academy of Sciences, Moscow, Russia

^c University of Berlin, Faculty of Meteorology, Berlin, Germany

Received November 12, 2008

Abstract—This paper deals with numerical experiments based on the coupled ECHAM–HOPE model. The
results of experiments are analyzed. The initial fields for the calculations over time periods from one month to
one year are constructed based on the results of the data assimilation of temperature profiles from TOGA–TAO
moorings. The perturbations of the initial fields and the propagation of these perturbations with specific com-
putational time intervals are analyzed on the basis of the results of these experiments. It is shown that the stron-
gest impacts of the perturbations are localized in specific regions of the World Ocean corresponding to the ener-
getically active zones of the Earth. The mechanism of the transition of these perturbations is also studied. Dif-
ferent statistical properties of the ensemble of experiments are presented.

DOI: 10.1134/S0001437010030021

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