Fig. 2: Amazon Tall Tower Observatory in central Amazonia under different smoke conditions.
From: African biomass burning affects aerosol cycling over the Amazon
a Southerly winds transporting smoke from deforestation fires during the period of intense burning on 06 August 2019; b Strong easterly winds transporting African biomass burning to the otherwise clean Amazonian conditions on 03 February 2020 during the wet season; c, d Dry season days receiving smoke from both, South American and African fires. The figure shows composite maps of satellite images with cloud cover and smoke plumes, individual detected fires (yellow dots), overall wind fields at 950 hPa (red arrows), and HYSPLIT 3 d backward trajectory (BT) ensembles (blue dots) started at the ATTO site (red circular markers). The green boundary shows the legal Amazon region. Light blue lines show the major highways in the Amazon basin. Details on the creation of the maps can be found in the method sections on backward trajectories and geographic information system (GIS) data and processing.
