Identification and quantification of giant bioaerosol particles over the Amazon rainforest

Author:

Barbosa Cybelli G. G.,Taylor Philip E.,Sá Marta O.,Teixeira Paulo R.,Souza Rodrigo A. F.ORCID,Albrecht Rachel I.ORCID,Barbosa Henrique M. J.ORCID,Sebben BrunaORCID,Manzi Antônio O.,Araújo Alessandro C.,Prass Maria,Pöhlker Christopher,Weber Bettina,Andreae Meinrat O.ORCID,Godoi Ricardo H. M.

Abstract

AbstractEukarya dominate the coarse primary biological aerosol (PBA) above the Amazon rainforest canopy, but their vertical profile and seasonality is currently unknown. In this study, the stratification of coarse and giant PBA >5 µm were analyzed from the canopy to 300 m height at the Amazon Tall Tower Observatory in Brazil during the wet and dry seasons. We show that >2/3 of the coarse PBA were canopy debris, fungal spores commonly found on decaying matter were second most abundant (ranging from 15 to 41%), followed by pollens (up to 5%). The atmospheric roughness layer right above the canopy had the greatest giant PBA abundance. Measurements over 5 years showed an increased abundance of PBA during a low-rainfall period. Giant particles, such as pollen, are reduced at 300 m, suggesting their limited dispersal. These results give insights into the giant PBA emissions of this tropical rainforest, and present a major step in understanding the type of emitted particles and their vertical distribution.

Publisher

Springer Science and Business Media LLC

Subject

Atmospheric Science,Environmental Chemistry,Global and Planetary Change

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