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AGU: Geophysical Research Letters

 

Index Terms

  • Global Change: Water cycles
  • Global Change: Global climate models
  • Atmospheric Processes: Precipitation

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 32, L18704, 4 PP., 2005
doi:10.1029/2005GL023654

Attribution studies of observed land precipitation changes with nine coupled models

F. Hugo Lambert

CEH Wallingford, Wallingford, UK

Department of Physics, University of Oxford, Oxford, UK

Nathan P. Gillett

Climatic Research Unit, University of East Anglia, Norwich, UK

Dáithí A. Stone

Department of Physics, University of Oxford, Oxford, UK

Chris Huntingford

CEH Wallingford, Wallingford, UK

Global-land mean observations of 20th century precipitation are compared to modelled values using an optimal regression technique for nine general circulation models. The combined influence of major anthropogenic and natural forcings is detected in five cases. Comparing the accuracy of precipitation and temperature simulation of each model, we find that low temperature simulation accuracy produces low precipitation simulation accuracy, but temperature accuracy does not determine precipitation accuracy in general. Model formulation appears to be more important for accurate precipitation simulation than inclusion of a more complete set of forcings. The implications for possible constraints on land precipitation are discussed.

Received 27 May 2005; accepted 18 August 2005; published 21 September 2005.

Citation: Lambert, F. H., N. P. Gillett, D. A. Stone, and C. Huntingford (2005), Attribution studies of observed land precipitation changes with nine coupled models, Geophys. Res. Lett., 32, L18704, doi:10.1029/2005GL023654.

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