Evaluation of the 2xCO2 impact on european climate variability with a variable resolution GCM

  • Michel Déqué
  • Francisco Javier Doblas-Reyes
Chapter
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Part of the Lecture Notes in Earth Sciences book series (LNEARTH, volume 74)

Abstract

This paper analyses climate variability in a numerical simulation of the impact of a doubling of atmospheric carbon dioxide concentrations. The sea surface temperatures (SST) come from a 240-year simulation with the Hadley Centre coupled model. Two 10-year time slices are simulated with a variable resolution version of the ARPEGE-IFS atmosphere general circulation model (AGCM). This model has a maximum horizontal resolution over Europe (60 to 100 km mesh size). The impact over Europe is analysed through the daily minimum and maximum temperature, and precipitation. Minimum and maximum temperatures increase whatever the season. Precipitation increases during the colder half of the year. The impact on temporal variability is analysed separately for three parts of the spectrum. Seasonal variability increases for the three variables. The intraseasonal variability of temperature decreases, whereas the intraseasonal variability of precipitation increases in winter, with more heavy rainy days and less dry days. The impact on the interannual variability is not significant. The extreme temperatures are warmer, but no significant impact is found on extreme precipitation.

Keywords

Interannual Variability Climate Research Unit Intraseasonal Variability Variable Resolution Atmospheric Carbon Dioxide Concentration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer-Verlag 1998

Authors and Affiliations

  • Michel Déqué
  • Francisco Javier Doblas-Reyes

There are no affiliations available

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