PCMDI

CAPT

Cloud Feedbacks

CMIP5

CMIP3

Other MIPs

Software

Publications

Google Calendar

Lab Calendar


Site Map

UCRL-WEB-152471

Privacy & Legal Notice

Thanks to Our Sponsors:

PCMDI > WCRP CMIP3 Model Output > Diagnostic Subprojects Printer Friendly Version
 
<< Back to WCRP CMIP3 Subprojects

  • Valverde, M., Marengo, J. A, 2007: CHANGE IN THE ATMOSPHERIC CIRCULATION PATTERN OVER SOUTH AMERICA BY CLIMATE FUTURE SCENARIOS FROM MODELS OF IPCC AR4 CLIMATE SIMULATIONS (in Portuguese). Revista Brasiliera de Meteorologia. Submitted.

This paper analyses the changes in the atmospheric circulation pattern that can come happen in the climate of the South America (SA), as consequence of the increase in the concentrations of the C02. For this purpose 5 global models from IPCC AR4 (CCCMA, GFDL, HadCM3, MIROC and GISS) are utilized, for the periods of 1961-1990 (present climate - 20C3M) and 2011-2100 (SRESA2). Among, the models analyzed, the HadCM3 simulates the summer and spring circulation close to its observed, despite of locate the Bolivian High (BA) and the Chaco low (CL) shifted for the southwest of its climatological positions. On the other hand, for future scenarios the BA is shifted to west, and the CL is stronger and extends its over center of Brazil, generating underestimates the precipitation on the Amazonia. The GFDL model simulates better the precipitations in fall, over the north of the northeast Brazil. The subtropical highs of the north and south hemisphere show an adequate position to the location of the Intertropical Convergence Zone - ITZC (over 5S). For future scenarios, this model does not change its circulation pattern, and in the last climatology (2071-2100), it generates positive anomalies over the north of the Amazonia. The GISS model simulates a summer and spring circulation far from its observed in the present climate. However, for the 2071-2100 future scenarios simulates a lot rain over the Amazonia.


Last Updated: 2007-12-14

<< Back to WCRP CMIP3 Subprojects
 
For questions or comments regarding this website, please contact the Webmaster.
 
Lawrence Livermore National Laboratory  |  Physical & Life Sciences Directorate