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The size distribution of desert dust aerosols and its impact on the Earth system
Authors
S Albani
S Engelstaeder
+5 more
MG Flanner
J Kok
NM Mahowald
RA Scanza
DS Ward
Publication date
19 November 2013
Publisher
eScholarship, University of California
Doi
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Abstract
The global cycle of desert dust aerosols responds strongly to climate and human perturbations, and, in turn, impacts climate and biogeochemistry. Here we focus on desert dust size distributions, how these are characterized, emitted from the surface, evolve in the atmosphere, and impact climate and biogeochemistry. Observations, theory and global model results are synthesized to highlight the evolution and impact of dust sizes. Individual particles sizes are, to a large extent, set by the soil properties and the mobilization process. The lifetime of different particle sizes controls the evolution of the size distribution as the particles move downwind, as larger particles fall out more quickly. The dust size distribution strongly controls the radiative impact of the aerosols, as well as their interactions with clouds. The size of particles controls how far downwind they travel, and thus their ability to impact biogeochemistry downwind of the source region. © 2013 The Authors
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info:doi/10.1016%2Fj.aeolia.20...
Last time updated on 05/06/2019
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eScholarship - University of California
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