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The Effects of Model-Generated Climatic Changes due to a CO2 Doubling on Desertification Processes in the Mediterranean Area

  • H. J. Jung
  • W. Bach
Conference paper

Summary

For the estimation of a climatic change induced by a doubling of atmospheric CO2 we use the results of three-dimensional general circulation models (GCM). Although the results from present climate modeling cannot be considered as predictions of future climatic conditions due to the inherent models’ deficits, they can still serve a useful purpose in climate change scenarios. The reason for this is that climate models are the only tools available to study the response of the climate system to a perturbation in a physically consistent manner and that such types of models can provide a consistent data set of high temporal and spatial resolution. For the Mediterranean area, the results obtained from three different GCMs, namely, the British Meteorological Office model (BMO), the Goddard Institute of Space Studies model (GISS), and the National Center for Atmospheric Research model (NCAR) are shown. The regional and seasonal distributions of temperature, precipitation, and soil moisture are used to study the potential for desertification. The results indicate that the CO2-induced changes for temperature generated by the three models are quite similar. The values of the area mean change range between 2.5 and 4.2 K. The precipitation response results in a diverse pattern. The physical mechanisms likely to be responsible for the climatic changes are identified and their statistical significance is tested. This type of work will help us develop the methodology and assist us in gaining insight into the use of climate model scenarios for impact analysis.

Keywords

Soil Moisture General Circulation Model Climatic Change Scenario Ocean Heat Transport Soil Moisture Change 
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 Science+Business Media Dordrecht 1986

Authors and Affiliations

  • H. J. Jung
    • 1
  • W. Bach
    • 1
  1. 1.Center for Applied Climatology and Environmental Studies, Dept. of GeographyUniversity of MünsterMünsterWest-Germany

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