Abstract
The anthropogenic increase in greenhouse gas concentrations will possibly cause climate change in the next century. Some of the most useful tools for exploring this subject, are the 3-D General Circulation Models (GCM). The response to an increase in greenhouse gases have shown many differences between models (Schlesinger and Mitchell, 1987).The sensitivity to external forcing is a key parameter of the response of the CGM. Cess and Potter (1988) proposed a methodology based on the global increase and decrease in the Sea Surface Temperature (SST) by 2 K. This methodology has been used in a GCM intercomparison involving 19 GCMs (Cess et al., 1990. As most of these GCMs have been dramatically changed during the last five years, a new intercomparison is now undertaken.Météo-France has participated in the intercomparison with two GCMs; the previous one EMER-AUDE and the most recent one ARPEGE. Thus, we have the opportunity to compare the sensitivity of these two models which were also used for time-slice 2*CO 2 experiments (mahfouf et al., 1994a et Timbal et al., 1995). Since ARPEGE includes a wider range of options, we have performed three sets of experiments to study the impact of a new soil-vegetation scheme, ISBA, described by Noilhan and Planton (1989). Four sets of experiments, one with EMERAUDE and three with ARPEGE will be presented hereafter.
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Timbal, B., Royer, JF., Mahfouf, JF., Déqué, M. (1996). Sensitivity Parameters of the Meteo-France Climate Models: Emeraude and Arpege. In: Treut, H.L. (eds) Climate Sensitivity to Radiative Perturbations. NATO ASI Series, vol 34. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-61053-0_15
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DOI: https://doi.org/10.1007/978-3-642-61053-0_15
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