%0 Journal Article
%@nexthigherunit 8JMKD3MGPCW/43SKC35
%@nexthigherunit 8JMKD3MGPCW/46JKC45
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%@archivingpolicy denypublisher denyfinaldraft12
%@issn 0177-798X
%@resumeid
%@resumeid 8JMKD3MGP5W/3C9JJ82
%@usergroup Simone
%@usergroup administrator
%3 Silva-effects.pdf
%X A coupled biosphere-atmosphere statistical-dynamical model (SDM) is used to study the climatic effects of Amazonian deforestation. A soil moisture model based on BATS has been incorporated into the SDM in order to study the biogeophysical feedback of change in surface characteristics to regional climate due to the deforestation. In the control experiment, the mean annual and mean seasonal climate is well simulated by the model when compared with NCEP/NCAR reanalysis data. In the deforestation experiment, the evergreen broadleaf trees in the Amazonian region are substituted by short grass. The effects of Amazonian deforestation on regional climate are analysed taking into account the model simulations for the land portion of the latitude belts comprising the tropical region. Amazonian deforestation results in regional climate changes such as a decrease in evaporation, precipitation, available surface net radiation and soil moisture content, and an increase in temperatures and sensible heat flux. The reduction in transpiration was responsible for the most part of the decrease in total evapotranspiration. The reduction in precipitation was larger than the decrease in evapotranspiration so that runoff was reduced. The simulation of the diurnal cycle of the surface temperature shows an increase in temperature during the day and a decrease at night, which is in agreement with observations, whereas earlier GCM experiments showed an increase both during the day and night. In general, the changes in temperature and energy fluxes are in good agreement with GCM experiments, showing that the SDM is able to simulate the characteristics of the tropical climate that are associated with the substitution of forest by pasture areas.
%8 dec.
%N 1-2
%@secondarydate 20060125
%T Effects of the Amazonian deforestation on climate: a numerical experiment with a coupled biosphere-atmosphere model with soil hydrology
%@secondarytype PRE PI
%K land surface, tropical deforestation, climate, circulation, parameterization.
%@visibility shown
%@group
%@group DMA-INPE-MCT-BR
%@group DMD-INPE-MCT-BR
%@e-mailaddress atus@cptec.inpe.br
%@secondarykey INPE-13739-PRE/8929
%@copyholder SID/SCD
%2 sid.inpe.br/iris@1915/2006/01.25.17.11.29
%@affiliation Laboratório de Climatologia e Biogeografia LCB, FFLCH/USP, SP
%@affiliation Centro de Previsão de Tempo e Estudos Cliamáticos CPTEC/INPE
%@affiliation Centro de Previsão de Tempo e Estudos Cliamáticos CPTEC/INPE
%B Theoretical and Applied Climatology
%P 1-18
%4 sid.inpe.br/iris@1915/2006/01.25.17.11
%D 2006
%@documentstage Simone
%V 85
%A Silva, M. E. S.,
%A Franchito, Sergio Henrique,
%A Rao,
%A Vadlamudi,
%A Brahmananda,
%@dissemination WEBSCI; PORTALCAPES; MGA.
%@area MET