Use of CALIPSO lidar observations to evaluate the cloudiness simulated by a climate model

DOI Web Site Web Site 被引用文献13件
  • H. Chepfer
    LMD/IPSL CNRS, Université Pierre et Marie Curie Paris France
  • S. Bony
    LMD/IPSL CNRS, Université Pierre et Marie Curie Paris France
  • D. Winker
    NASA/LaRC Hampton Virginia USA
  • M. Chiriaco
    SA/IPSL CNRS, Université Versailles‐Saint Quentin Paris France
  • J.‐L. Dufresne
    LMD/IPSL CNRS, Université Pierre et Marie Curie Paris France
  • G. Sèze
    LMD/IPSL CNRS, Université Pierre et Marie Curie Paris France

書誌事項

公開日
2008-08
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2008gl034207
公開者
American Geophysical Union (AGU)

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説明

<jats:p>New space‐borne active sensors make it possible to observe the three‐dimensional structure of clouds. Here we use CALIPSO lidar observations together with a lidar simulator to evaluate the cloudiness simulated by a climate model: modeled atmospheric profiles are converted to an ensemble of subgrid‐scale attenuated backscatter lidar signals from which a cloud fraction is derived. Except in regions of persistent thick upper‐level clouds, the cloud fraction diagnosed through this procedure is close to that actually predicted by the model. A fractional cloudiness is diagnosed consistently from CALIPSO data at a spatio‐temporal resolution comparable to that of the model. The comparison of the model's cloudiness with CALIPSO data reveals discrepancies more pronounced than in previous model evaluations based on passive observations. This suggests that space‐borne lidar observations constitute a powerful tool for the evaluation of clouds in large‐scale models, including marine boundary‐layer clouds</jats:p>

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