HR: 1340h
AN: A13B-0914    [Abstracts]
TI: Analysis of the influence of a climate change on the free tropospheric water vapor over mid-latitude areas in GCMs
AU: * Brogniez, H
EM: hbrogniez@geosci.uchicago.edu
AF: Department of the Geophysical Sciences The University of Chicago , 5437 S. Ellis Avenue, Chicago, IL 60637 United States
AU: Pierrehumbert, R T
EM: rtp1@geosci.uchicago.edu
AF: Department of the Geophysical Sciences The University of Chicago , 5437 S. Ellis Avenue, Chicago, IL 60637 United States
AB: The representation of the mid-tropospheric water vapor over a mid-latitude area is analyzed for two General Circulation Models. We use a lagrangian approach to study the effect of a climate change on the distribution of the water vapor content of the free troposphere. For this purpose, different kind of reconstruction of the water vapor field at 500mb were carried out, hence allowing to study the effects of changes in the structure of the temperature field and of changes in the trajectory statistics. The results show the lack of representation of the driest relative humidity values in the studied GCMs. They also highlight the importance of both dynamic and thermodynamic when analyzing the role of a climate change on the water vapor distribution of the free troposphere.
DE: 1626 Global climate models (3337, 4928)
DE: 1637 Regional climate change
DE: 3305 Climate change and variability (1616, 1635, 3309, 4215, 4513)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005