title: Urban photochemical pollution in the Iberian Peninsula: Lisbon and Barcelona airsheds.
abstract: Numerical simulations with photochemical transport models were independently performed for two domains situated in the Iberian Peninsula covering the Lisbon and Barcelona airsheds. Although the days chosen for simulation of the two cities are not the same, the synoptic situations in both cases, known as typical summertime situations, were similar, which allowed the development of typical mesoscale circulations, such as sea breezes and mountain and valley winds dominated by the Azores anticyclone. Emission inventories for the two areas were developed. The O3 concentrations recorded in both cities have a similar level. Nevertheless, O(x) values in Barcelona are higher than in Lisbon, which may, at a first glance, indicate an apparently more oxidant atmosphere in Barcelona. Photochemical modeling for the two cities has shown that the behavior of the circulatory patterns in both urban areas is rather different, which mainly has to do with the different strengths of the sea breeze and the topography, inducing an important offshore vertical layered dimension of pollutant transport in Barcelona versus an important inland horizontal transport in Lisbon.
authors.affiliation: Department of Science and Technology, University of Fernando Pessoa, Porto, Portugal.
authors.forename: Nelson
authors.initials: N
authors.lastname: Barros
authors.forename: Carlos
authors.initials: C
authors.lastname: Borrego
authors.forename: Isabel
authors.initials: I
authors.lastname: Toll
authors.forename: Cecilia
authors.initials: C
authors.lastname: Soriano
authors.forename: Pedro
authors.initials: P
authors.lastname: Jiménez
authors.forename: José Maria
authors.initials: JM
authors.lastname: Baldasano
mesh_terms: D000392:Air Movements; D000393:Air Pollutants / Q000032:analysis*; D002947:Cities; D004784:Environmental Monitoring; D008685:Meteorological Concepts; D008962:Models, Theoretical; D010083:Oxidants, Photochemical / Q000032:analysis*; D010126:Ozone / Q000032:analysis*; D011174:Portugal; D013030:Spain
chemical_list: D000393:Air Pollutants; D010083:Oxidants, Photochemical; D010126:Ozone