Mathematics – Logic
Scientific paper
Mar 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012georl..3905805v&link_type=abstract
Geophysical Research Letters, Volume 39, Issue 5, CiteID L05805
Mathematics
Logic
Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Atmospheric Composition And Structure: Air/Sea Constituent Fluxes (3339, 4504), Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties, Atmospheric Composition And Structure: Radiation: Transmission And Scattering
Scientific paper
Ten years (2001-2010) of aerosol light-scattering measurements in N.E. Atlantic marine air are analysed to determine wind-speed related influences on scattering properties. The scattering coefficient and the backscattering coefficient dependency on wind speed (U) was determined for the winter (Low Biological Activity-LBA) and the summer seasons (High Biological Activity-HBA), and was found to be dependent on ˜U2. In spite of having a U2 dependency, scattering properties for the LBA-period are approximately twice those of the HBA-period. 96% of the LBA-HBA scattering difference can be explained by the combined effects of size distribution and refractive index differences while 70% of the scattering difference can be attributed to a difference in refractive index alone resulting from organic-matter enrichment during the HBA period. The 550 nm scattering coefficient was ˜70 Mm-1 for ˜25 ms-1 wind speeds, which is considerably higher than that encountered under polluted air masses in the same region.
Jennings Gerard S.
O'Dowd Colin
Vaishya Aditya
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