Abstract
Uncertainties in regional climate change predictions for the 21st century by five coupled atmosphere-ocean General Circulation Models (AOGCMs) (two of them including ensembles of simulations), for different anthropogenic forcing scenarios and 23 regions in the World, are examined. The variables considered are seasonally and regionally averaged precipitation and surface air temperature for the future period of [2071–2100] as compared to the present day period of [1961–1990]. We find that the dominant source of uncertainty in the simulation of regional climatic changes by AOGCMs is due to inter-model variability with inter-scenario and internal model variability playing secondary roles. For both models including ensemble simulations, the spread of predicted average climatic changes by different realizations of the same ensemble is small. In addition, simulated regional climatic changes exhibit a high level of coherency among different forcing scenarios. Overall, uncertainties in predicted regional changes by the five AOGCMs are of the order of 3 K or greater for surface air temperature and 25% of present day values or greater for precipitation. These uncertainties would be transmitted to any regionalization technique used to enhance the regional information of AOGCMs. Differences between AOGCMs and their effects on the model simulations need to be better understood in order to increase confidence in the prediction of regional climate change due to anthropogenic forcings.
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References
Bacher, A., J.M. Oberhuber, E. Roeckner, ENSO dynamics and seasonal cycle in thetropical Pacific as simulated by the ECHAM4/OPYC3 coupled general circulation model, Clim. Dyn., 14, 431, 1998.
Boer, G.J., G.M. Flato, D. Ramsden, 1999a, A transient climate change simulation with historical and projected greenhouse gas and aerosol forcing: projected climate for the 21st century. Submitted to Clim. Dyn., 1999b.
Boer, G.J., G.M. Flato, M.C. Reader, D. Ramsden, A transient climate change simulation with historical and projected greenhouse gas and aerosol forcing: experimental design and comparison with the instrumental record for the 20th century. Submitted to Clim. Dyn., 1999a.
Giorgi F. and L.O. Mearns, Approaches to regional climate change simulation: a review, Rev. Geo., 29, 191–216, 1991.
Giorgi, F. and R. Francisco, Uncertainties in regional climate change predictions. A regional analysis of ensemble simulations with the HADCM2 GCM, Clim. Dyn., in press (1999).
Gordon H.B., and S.P O’Farrell, Transient climate change in the CSIRO coupled model with dynamic sea ice, Mon. Wea. Rev., 125, 875, 1997.
Hasumi H., and N. Suginohara, Effects of the seasonal variation on forming the steady state of an atmosphere-ocean coupled system, Clim. Dyn., 14, 803, 1998.
Hulme, M., O. Brown, Portraying climate scenario uncertainties in relation to tolerable regional climate change, Climate Research, 10, 1–14, 1998.
IPCC, Climate change 1992: the supplementary report to the IPCC scientific assessment. IPCC Working Group I. Houghton JT, B.A. Callander and S.K. Varney (eds). Cambridge University Press, Cambridge, UK, 200 pp., 1992.
IPCC, Climate change 1995: The science of climate change, Contribution of Working Group I to the Second Assessment Report of the Intergovernmental Panel on Climate Change. J.T. Houghton, L.G. Meira Filho, B.A. Callander, N. Harris, A. Kattenberg, K. Maskell (eds), Cambridge University Press, New York, 572 pp., 1996.
IPCC, The Regional Impacts of Climate Change, An Assessment of Vulnerability, A Special Report of IPCC Working Group II, R.T. Watson, M.F. Zinyowera, R.H. Moss, and D.J. Dokken (eds), Cambridge University Press, Cambridge, U.K., 517 pp., 1998.SPI
Johns T.C., R.E. Carnell, J.F. Crossley, J.M. Gregory, J.F.B. Mitchell, C.A. Senior, S.F.B. Tett, R.A. Wood, The second Hadley Centre coupled ocean-atmosphere GCM: model description, spin up and validation, Clim. Dyn., 13, 103–134, 1997.
Kjttel T.G.F., F. Giorgi, G.A. Meehl, Intercomparison of regional biases and doubled C02 sensitivity of coupled atmosphere-ocean general circulation model experiments, Clim. Dyn., 14, 1–15, 1998.
Lal M., U. Cubasch, R. Voss, and J. Waszkewitz, Effects of transient increase in greenhouse gases and sulfate aerosols in monsoon climate, Current Science, 69, 752–763, 1998.
McFarlane, N.A., G.J. Boer, J.-P. Blanchet, and M. Lazare, The Canadian Climate Center second generation general circulation model and its equilibrium climate, J. Climate, 5, 1013, 1992.
Mitchell J.F.B., and T.C. Johns, On modification of global warming by sulfate aerosols, J. Climate, 10, 245–267, 1997.
New, A.M., M. Hulme, P.D. Jones, Representing twentieth-century space time climate variability. Part I: Development of a 1961–1990 mean monthly terrestrial climatology. J. Climate, 12, 829, 1999.
Whetton, P.H., M.H. England, S.P. O’Farrell, I.G. Watterson, and A.B. Pittock, Global comparison of the regional rainfall results of enhanced greenhouse coupled and mixed layer ocean experiments: implications for climate change scenario development. Climatic Change, 33, 497–519.
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Giorgi, F., Francisco, R. (2001). Uncertainties in the Prediction of Regional Climate Change. In: Visconti, G., Beniston, M., Iannorelli, E.D., Barba, D. (eds) Global Change and Protected Areas. Advances in Global Change Research, vol 9. Springer, Dordrecht. https://doi.org/10.1007/0-306-48051-4_14
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DOI: https://doi.org/10.1007/0-306-48051-4_14
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