Biomass burning aerosol as a modulator of the droplet number in the southeast Atlantic region
Mary Kacarab,K. Lee Thornhill,Amie Dobracki,Steven G. Howell,Joseph R. O'Brien,Steffen Freitag,Michael R. Poellot,Robert Wood,Paquita Zuidema,Jens Redemann,and Athanasios Nenes
Mary Kacarab
School of Earth and Atmospheric Sciences, Georgia Institute of
Technology, Atlanta, GA 30332, USA
K. Lee Thornhill
NASA Langley Research Center, Hampton, VA 23666, USA
Amie Dobracki
Department of Oceanography, University of Hawaii at Manoa, Honolulu, HI 96822,
USA
Department of Atmospheric Sciences, Rosenstiel School of Marine and
Atmospheric Science, University of Miami, Miami, FL 33149, USA
Steven G. Howell
Department of Oceanography, University of Hawaii at Manoa, Honolulu, HI 96822,
USA
Joseph R. O'Brien
Department of Atmospheric Sciences, University of North Dakota, Grand
Forks, ND 58202, USA
School of Earth and Atmospheric Sciences, Georgia Institute of
Technology, Atlanta, GA 30332, USA
Institute for Chemical Engineering Sciences, Foundation for Research
and Technology – Hellas, Patras, 26504, Greece
Laboratory of Atmospheric Processes and their Impacts, School of
Architecture, Civil and Environmental Engineering, Ecole Polytechnique
Federale de Lausanne, Lausanne, 1015, Switzerland
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We find that extensive biomass burning aerosol plumes from southern Africa can profoundly influence clouds in the southeastern Atlantic. Concurrent variations in vertical velocity, however, are found to magnify the relationship between boundary layer aerosol and the cloud droplet number. Neglecting these covariances may strongly bias the sign and magnitude of aerosol impacts on the cloud droplet number.
We find that extensive biomass burning aerosol plumes from southern Africa can profoundly...
