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Ten-member ensembles of seasonal hindcasts are produced with 4 general circulation models, the CCCma second and third generation atmospheric general circulation models (AGCM2 and AGCM3), a reduced-resolution version of the medium-range weather forecast global spectral model (SEF, Ritchie, 1991) and the global environmental multiscale model (GEM) developed at Recherche en prévision numérique (RPN).
The hindcasts are procuded for 12 seasons (DJFM, JFMA, FMAM, ...) for each year in 1969-2002. The integrations are initialized from the NCEP/NCAR reanalysis lagged at 12-hour intervals prior the forecast period. The global sea surface temperature anomaly from AMIP for the month prior the forecast period is persisted during the 4-month forecast period.
Kalnay E., M. Kanamitsu, R. Kistler, W. Collins, D. Deaven, L. Gandin, M. Iredell, S. Saha, G. White, J. Woollen, Y. Zhu, M. Chelliah, W. Ebisuzaki, W. Higgins, J. Janowiak, K. C. Mo, C. Ropelewski, J. Wang, A. Leetmaa, E. Reynolds, R. Jenne, D. Joseph, 1996: The NCEP/NCAR 40-year reanalysis project. Bull. Amer. Meteor. Soc., 77, 437-471.
McFarlane, N.A., G.J. Boer, J.-P. Blanchet, and M. Lazare, 1992: The Canadian Climate Centre second-generation general circulation model and its equilibrium climate. J. Climate, 5, 1013-1044 (Abstract).
Ritchie, H., 1991: Application of the semi-Lagrangian method to a multilevel spectral primitive-equations model. Quart. J. Roy. Meteor. Soc., 117, 91-106.