Transport Of Aerosols In The Mediterranean
Coastal Zone
Author(s)
J. Piazzola, A. Demoisson & G. Tedeschi
Abstract
Aerosol particles in coastal areas result from a complex mixing between seaspray
aerosols locally generated at the sea surface by breaking waves and a
continental component arising from natural and/or anthropogenic sources. We
present a study on the aerosol transport in a French Mediterranean coastal zone
based on physico-chemical characterization of the particle size distributions
measured on the island of Porquerolles. The results are analyzed using a 2D
model, the MACMod model, dedicated to the aerosol transport at a local scale. A
part of the analysis deals with the dispersion of organic compounds in the Marine
Boundary Layer (MABL). This shows that, even at very short fetch, the seaspray
particles represent a strong contribution of the aerosol size distributions
measured in the coastal zone. In contrast, the low wind speed conditions
correspond to air masses that are strongly impacted by pollution transported over
the Mediterranean. Under higher wind speed conditions, aerosol number and
mass concentrations of smaller sizes are lowered due to the dispersion of
anthropogenic pollutants. However, the model simulations show that the lifetime
of these submicronic particles in the atmosphere, which are characteristics of the
anthropogenic influence in coastal areas, is rather large.
Keywords: coastal aerosols, anthropogenic compounds.
Keywords
coastal aerosols, anthropogenic compounds
Related Book
Other papers in this volume
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