@InProceedings{SilvaDias:2004:DeBiBu,
author = "Silva Dias, Maria Assuncao Faus da",
affiliation = "{CPTEC-INPE-Cachoeira Paulista-12630-000-SP-Brasil}",
title = "Deforestation and Biomass Burning as Drivers of Regional Climate
Change in Amazonia",
booktitle = "Anais...",
year = "2004",
organization = "Conferencia Cientifica do LBA, 3.",
abstract = "Deforestation and biomass burning represent potential drivers of
significant regional climate change in the Amazon Basin. The
horizontal and temporal scales over which these drivers are
affecting the atmosphere varies for the different part of the
Amazon but a few common features arise from the research carried
out in LBA. Deforestation is associated to a change in land cover,
from forest to grassland or agriculture, or even a substitution by
secondary growth forest. The change in land cover has direct
impact on the energy input, through the change in surface albedo,
and on the energy output through availability of soil moisture at
root depth defining the partioning of sensible and latent heat
fluxes. This is basically a boundary forcing for the atmospheric
boundary layer and the effect on the atmosphere is a function of
the scale where it is happening. One key result is an increase in
surface temperature locally and impacts on cloudiness and rainfall
depending on the scale of the deforested area. Biomass burning
also has an impact on the surface forcing through a change in
surface albedo, but the main impact is in the change of
atmospheric composition, in particular with respect to number
concentration of aerosol. The internal forcing represented by
biomass burning alters the thermodynamic structure of the lower
layers and the cloud microphysical structure with both effects
combined changing the rainfall occurrence and amounts. The two
effects, deforestation and biomass burning, combine in nature and
the suggested effect is seen as a delay on the start of the rainy
season, and a tendency to produce more thunderstorms in the end of
the dry season.",
conference-location = "Brasilia",
conference-year = "27-29 jul.",
language = "en",
organisation = "LBA",
targetfile = "SilvaDiasMAF_LBA.pdf",
urlaccessdate = "16 jun. 2024"
}