NMME: IRI ECHAM4.5 Direct Coupled

This model is an updated version of the coupled model described in DeWitt (2005). Improvements to the model are in the coupling scheme and include a parameterized version of the diurnal solar cycle following Danabasoglu et al. (2006), and inclusion of the surface currents in the stress calculation following Luo et al. (2005) These changes help to reduce the models near-equatorial cold bias. The atmospheric component model is the Max-Planck Institute (MPI) ECHAM4.5 atmospheric general circulation model (AGCM; Roeckner et al., 1994) and is initialized with forced runs using observed SST. The ocean component model is the Geophysical Fluid Dynamics Laboratory (GFDL) Modular Ocean Model Version 3 (MOM3; Pacanowski and Griffies, 1998) initialized with a Derber-Rosati (1989) temperature assimilation scheme.


Danabasoglu, G., W. G. Large, J.J. Tribbia, P. R. Gent, and B. P. Briegleb, 2006: Diurnal coupling in the tropical oceans of CCSM3. J. Climate, 19, 2347-2365. Derber, J. and A. Rosati, 1989: A global oceanic data assimilation system. J. Phys. Oceanogr., 19, 1333-1347.

DeWitt, D. G., 2005: Retrospective forecasts of interannual sea surface temperature anomalies from 1982 to present using a directly coupled atmosphere-ocean general circulation model. Mon. Wea. Rev., 133, 2972-2995.

Luo, J.-J., S. Masson. E. Roeckner, G. Madec, and T. Yamagata, 2005: Reducing climatology bias in an ocean-atmosphere CGCM with improved coupling physics. J. Climate, 18, 2344-2360.

Pacanowski, R. C., and S. M. Griffies, 1998: MOM 3.0 manual. NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, 608pp.

Roeckner, and Coauthors, 1996: The atmospheric general circulation model ECHAM4: Model description and simulation of present day climate. Rep. 218, Max-Planck-Institute fur Meteorologie, 90 pp. [Available from MPI fur Meteorologie, Bundesstr. 55, 20146 Hamburg, Germany.]

Contact person: Dave DeWitt: daved@iri.columbia.edu