Influence of the Sea Breeze on the Air Pollution over the Attica Peninsula

In the frame of the APSIS project simulations of the dispersion of air pollutants over the Attica Peninsula are carried out for May 25, 1990. This day is characterized by clear sky conditions and a general flow from Northwest. Such conditions support the development of a sea breeze around the Peninsula, which is especially pronounced in the basin of Athens and the neighbouring coastal zone. The flow and turbulence fields are simulated with the the non hydrostatic model KAMM (Adrian and Fiedler, 1991). Based on these fields the dispersion of the air pollutants are calculated with the DRAIS model (Nester and Fiedler, 1992). The simpler chemical mechanism RADM1 was selected because only measurements of NO, NO₂, SO₂,CO and O₃ are available, which are well predicted by the RADM1 mechanism.