The relationship between biomass burning aerosols, cloud condensation nuclei and cloud structure in Amazonia
Paulo
Artaxo, Instituto de Física, Universidade de São Paulo, São Paulo, Brazil, artaxo@if.usp.br
(Presenting)
Meinrat
O.
Andreae, Max Planck Institute for Chemistry, Mainz, Germany, andreae@mpch-mainz.mpg.de
Daniel
Rosenfeld, Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem 91904 Israel, daniel@vms.huji.ac.il
Göran
Frank, Max Planck Institute for Chemistry, Mainz, Germany, gfrank@mpch-mainz.mpg.de
Pascal
Guyon, Max Planck Institute for Chemistry, Mainz, Germany, guyon@mpch-mainz.mpg.de
Luciana
Varanda
Rizzo, Instituto de Física, Universidade de São Paulo, São Paulo, Brazil, lrizzo@if.usp.br
Theotonio
Pauliquevis, Instituto de Física, Universidade de São Paulo, São Paulo, Brazil, theo@if.usp.br
Maria Assução
Faus da
Silva Dias, Instituto Nacional de Pesquisas Espaciais, INPE/CPTEC, Cachoeira Paulista, São Paulo, Brazil., assuncao@cptec.inpe.br
During the SMOCC (Smoke, clouds and aerosols perturbing the Amazonian climate) experiment in August-November 2002, aerosols and CCN measurements were made in Rondonia, Acre and Amazonas states. Aerosol light scattering, absorption and total aerosol particle number (CPC) were measured using the INPE Bandeirante plane. Cloud condensation nuclei (CCN) were measured using a static gradient chamber instrument. Very large aerosol concentrations were observed, with a high proportion of organic aerosols. A large range of values for the CCN efficiency was measured, ranging from 30 to 70%. Several vertical profiles were done at the Fazenda Nossa Senhora in Rondonia, and the airborne measurements were compared with detailed ground based determinations. Lidar vertical profiles indicates cloud formation suppression due to the very high aerosol loading, in agreement with recent remote sensing measurements, as well as with in-situ airborne measurements.