Aircraft observations of the interactions of the manaus plume with aerosols forest during rainy season: a case study

Measurements of aerosol size distribution and cloud condensation nuclei (CCN) efficiency over the Amazon Region close to the city of Manaus, Brazil, were taken during an airborne experiment in February – March (rainy season) 2014 as part of the Green Ocean Amazon Experiment (GOAmazon). A variety of aerosols were observed following the aging along the downwind Manaus plume, in a relatively well preserved portion of Amazon basin. At this work we evaluate how those aerosols interact with the Amazonian environment for the situation observed during 13 th march 2014. The aerosols size distribution is studied considering its aging downwind the Manaus plume. The concentration of CCN inside the plume is evaluated and a large enhancement is observed.