Fig. 1: In-situ sampling of black carbon particles in a pyroCb cloud.
From: Light absorption enhancement of black carbon in a pyrocumulonimbus cloud
A Geostationary Operational Environmental Satellites (GOES-17) satellite image of the flight path of the NASA DC-8 aircraft over the Williams Flats wildfire on August 8–9, 2019 (gray). The DC-8 aircraft allowed for in-situ measurements of BC particles during seven intersections of a pyroCb cloud. Particles were collected for TEM imaging during all transects of the flight. A TEM micrograph from one transect is shown in (B), and the red point in (A) indicates the particle sampling location. TEM images show that a large fraction of BC particles in the pyroCb cloud have external coatings. C A zoomed in view of TEM images highlights thick external coatings on BC particles within the pyroCb cloud. TEM images from other pyroCb cloud transects show similarly coated BC and are available from the authors on request.
