Amazonian vegetation impacts on aerosols and clouds (AVIAC)


Project leader


Funding source

Swedish Research Council - Vetenskapsrådet (VR)


Project Details

Start date: 01/01/2010
End date: 31/12/2012
Funding: 3950000 SEK


Description

We propose to directly measure how vegetation in the Amazon Basin controls cloud properties and how this natural state is perturbed by changes in land use and biomass burning. We will perform measurements from a research aircraft to determine aerosol/cloud interactions over the tropical rainforest. These measurements will be a part of larger international field projects CLAIRE 2010 and CLAIRE 2011 in cooperation with partners from Brazil, Germany, UK and USA. Specifically, we propose to develop and deploy an aircraft instrumental payload with which we can simultaneously determine the chemical composition and microphysical properties of the aerosols that do and do not form cloud droplets. We will combine a Counterflow Virtual Impactor (CVI) sampler along with an interstital aerosol inlet on the Brazilian National Institute of Space Research (INPE) Bandeirante research aircraft. Coupled aerosol-cloud process-oriented models will be used prior to and during the field experiments to design appropriate flight tracks. In turn, field data will be used in the same models to mimic the observed cloud properties and simulate various future scenarios. The overall results will provide key information to better understand the hydrological cycle in the tropics, aerosol-cloud interactions, the links between the biosphere and atmosphere in the tropics, and the effects on clouds of perturbations associated with deforestation and land-use change in Amazon Basin.

Last updated on 2017-31-03 at 12:57