ENSIP: the El Nino simulation intercomparison project

Latif, Mojib and Sperber, K. and Arblaster, J. and Braconnot, P. and Chen, D. and Colman, A. and Cubasch, U. and Cooper, C. and Delecluse, P. and DeWitt, D. and Fairhead, L. and Flato, G. and Hogan, T. and Ji, M. and Kimoto, M. and Kitoh, A. and Knutson, T. and Le Treut, H. and Li, T. and Manabe, S. and Marti, O. and Mechoso, C. and Meehl, G. and Power, S. and Roeckner, E. and Sirven, J. and Terray, L. and Vintzileos, A. and Voss, R. and Wang, B. and Washington, W. and Yoshikawa, I. and Yu, J. and Zebiak, S. (2001) ENSIP: the El Nino simulation intercomparison project. Climate Dynamics, 18 (3-4). pp. 255-276. ISSN 0930-7575


An ensemble of twenty four coupled ocean-atmosphere models has been compared with respect to their performance in the tropical Pacific. The coupled models span a large portion of the parameter space and differ in many respects. The intercomparison includes TOGA (Tropical Ocean Global Atmosphere)-type models consisting of high-resolution tropical ocean models and coarse-resolution global atmosphere models, coarse-resolution global coupled models, and a few global coupled models with high resolution in the equatorial region in their ocean components. The performance of the annual mean state, the seasonal cycle and the interannual variability are investigated. The primary quantity analysed is sea surface temperature (SST). Additionally, the evolution of interannual heat content variations in the tropical Pacific and the relationship between the interannual SST variations in the equatorial Pacific to fluctuations in the strength of the Indian summer monsoon are investigated. The results can be summarised as follows: almost all models (even those employing flux corrections) still have problems in simulating the SST climatology, although some improvements are found relative to earlier intercomparison studies. Only a few of the coupled models simulate the El Niño/Southern Oscillation (ENSO) in terms of gross equatorial SST anomalies realistically. In particular, many models overestimate the variability in the western equatorial Pacific and underestimate the SST variability in the east. The evolution of interannual heat content variations is similar to that observed in almost all models. Finally, the majority of the models show a strong connection between ENSO and the strength of the Indian summer monsoon.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 05 Jan 2022 03:03
Last Modified: 05 Jan 2022 03:03
Uncontrolled Keywords: atmosphere-ocean coupling; El Nino; general circulation model; monsoon; sea surface temperature; TOGA-COARE
Fields of Research (2008): 04 Earth Sciences > 0401 Atmospheric Sciences > 040105 Climatology (excl.Climate Change Processes)
Fields of Research (2020): 37 EARTH SCIENCES > 3702 Climate change science > 370202 Climatology
Socio-Economic Objectives (2008): D Environment > 96 Environment > 9603 Climate and Climate Change > 960304 Climate Variability (excl. Social Impacts)
Socio-Economic Objectives (2020): 19 ENVIRONMENTAL POLICY, CLIMATE CHANGE AND NATURAL HAZARDS > 1905 Understanding climate change > 190502 Climate variability (excl. social impacts)
Identification Number or DOI: https://doi.org/10.1007/s003820100174
URI: http://eprints.usq.edu.au/id/eprint/44882

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