Physics
Scientific paper
Apr 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25..991a&link_type=abstract
Geophysical Research Letters, Volume 25, Issue 7, p. 991-994
Physics
49
Atmospheric Composition And Structure: Aerosols And Particles
Scientific paper
Size distributions of mineral aerosols released by wind-erosion from and areas are of primary importance to model their transport patterns as well as their effect on climate. Wind tunnel experiments meant to test the influence of wind strength and soil characteristics are carried out with two natural soils differing both in texture and in mineral composition. In all cases, the aerosols can be considered as mixtures, in proportions depending on wind speed, of the same three lognormally distributed particle populations. By using appropriate binding energies for these populations, a sandblasting model previously developed allows retrieval of the size distributions of the aerosols produced by the two soils at any wind speed. A major implication of this study is that the size distributions of mineral aerosols greatly depend on the wind conditions prevailing during their generation. Aerosols optical properties being size dependent, this should clearly be taken into account in climate modeling.
Alfaro Stéphane C.
Gaudichet Annie
Gomes Laurent
Maillé Michel
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