Skip to content. | Skip to navigation

Personal tools

Sections
You are here: Home / Publications / Peer-reviewed papers / lmd_Picon1997_abstracts.html

lmd_Picon1997_abstracts.html

1997 .

(1 publication)

R. Roca, L. Picon, M. Desbois, H. Le Treut, and J.-J. Morcrette. Direct comparison of meteosat water vapor channel data and general circulation model results. Geophysical Research Letters, 24:147-150, 1997. [ bib | DOI | ADS link ]

Following a model to satellite approach, this study points out the ability of the general circulation model (GCM) of the Laboratoire de Météorologie Dynamique to reproduce the observed relationship between tropical convection and subtropical moisture in the upper troposphere. Those parameters are characterized from Meteosat water vapor equivalent brightness temperatures (WVEBT) over a monthly scale. The simulated WVEBT field closely resembles to the observed distribution. The pure water vapor features and the convective areas are well located and their seasonal variations are captured by the model. A dry (moist) bias is found over convective (subsiding) areas, whereas the model globally best acts over Atlantic ocean than over Africa. The observed and simulated seasonal variations show that an extension of the ITCZ is correlated to a moistening of the upper troposphere in subtropical areas. Those results imply a positive large scale relationship between convective and subsiding areas in both observation and simulation, and suggest the relevance of our approach for further climatic studies.

Contact information

EMC3 group

LMD/CNRS/UPMC
Case 99
Tour 45-55, 3ème étage
4 Place Jussieu
75252 Paris Cedex 05
FRANCE
Tel: 33 + 1 44 27 27 99
      33 + 6 16 27 34 18 (Dr F. Cheruy)
Tel: 33 + 1 44 27 35 25 (Secretary)
Fax: 33 + 1 44 27 62 72
email: emc3 at lmd.jussieu.fr

Map of our location

EUREC4A campaign

logo_eurec4a.fc481ace.png

Click the above logo for
the operationnal center.
Today's LMDZ meteogram