HadCM3

HadCM3 (abbreviation for Hadley Centre Coupled Model, version 3) is a coupled atmosphere-ocean general circulation model (AOGCM) developed at the Hadley Centre in the United Kingdom.^[1]^[2]^[3] It was one of the major models used in the IPCC Third Assessment Report in 2001.

Unlike earlier AOGCMs at the Hadley Centre and elsewhere (including its predecessor HadCM2), HadCM3 does not need flux adjustment (additional "artificial" heat and freshwater fluxes at the ocean surface) to produce a good simulation. The higher ocean resolution of HadCM3 is a major factor in this; other factors include a good match between the atmospheric and oceanic components; and an improved ocean mixing scheme (Gent and McWilliams). HadCM3 has been run to produce simulations for periods of over a thousand years, showing little drift in its surface climate.

HadCM3 is composed of two components: the atmospheric model HadAM3 and the ocean model HadOM3 (which includes a sea ice model). Simulations use a 360-day calendar, where each month is 30 days.

^ Gordon, C.; Cooper, C.; Senior, C.A.; Banks, H.; Gregory, J.M.; Johns, T.C.; Mitchell, J.F.B.; Wood, R.A. (2000). "The simulation of SST, sea ice extents and ocean heat transports in a version of the Hadley Centre coupled model without flux adjustments". Climate Dynamics. 16 (2–3): 147–168. Bibcode:2000ClDy...16..147G. doi:10.1007/s003820050010. S2CID 128588784. Archived from the original on 14 November 2001.
^ Pope, V.D.; Gallani, M.L.; Rowntree, P.R.; Stratton, R.A. (2000). "The impact of new physical parameterizations in the Hadley Centre climate model – HadAM3". Climate Dynamics. 16 (2–3): 123–146. Bibcode:2000ClDy...16..123P. doi:10.1007/s003820050009. S2CID 129848975. Archived from the original on 7 July 2001.
^ Collins, M.; Tett, S.F.B.; Cooper, C. (2001). "The internal climate variability of HadCM3, a version of the Hadley Centre coupled model without flux adjustments". Climate Dynamics. 17 (1): 61–81. Bibcode:2001ClDy...17...61C. doi:10.1007/s003820000094. S2CID 129349364.

[1] Gordon, C.; Cooper, C.; Senior, C.A.; Banks, H.; Gregory, J.M.; Johns, T.C.; Mitchell, J.F.B.; Wood, R.A. (2000). "The simulation of SST, sea ice extents and ocean heat transports in a version of the Hadley Centre coupled model without flux adjustments". Climate Dynamics. 16 (2–3): 147–168. Bibcode:2000ClDy...16..147G. doi:10.1007/s003820050010. S2CID 128588784. Archived from the original on 14 November 2001.

[2] Pope, V.D.; Gallani, M.L.; Rowntree, P.R.; Stratton, R.A. (2000). "The impact of new physical parameterizations in the Hadley Centre climate model – HadAM3". Climate Dynamics. 16 (2–3): 123–146. Bibcode:2000ClDy...16..123P. doi:10.1007/s003820050009. S2CID 129848975. Archived from the original on 7 July 2001.

[3] Collins, M.; Tett, S.F.B.; Cooper, C. (2001). "The internal climate variability of HadCM3, a version of the Hadley Centre coupled model without flux adjustments". Climate Dynamics. 17 (1): 61–81. Bibcode:2001ClDy...17...61C. doi:10.1007/s003820000094. S2CID 129349364.

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