| Abstract |
Main objective of the present work is to study the role of the megacities of the Eastern Mediterranean, on the chemical composition of atmospheric aerosol. Three different samplings were planned for the actualization of that objective.
The first sampling in Athens took place at the National Centre for Scientific Research "Demokritus" site. PM 10 suspended particles were collected and the duration of the sampling was almost 35 years (1980-today). The samples were analyzed for ionic composition with the use of ion chromatography. The seasonal and temporal variation of the natural and anthropogenic aerosols were studied and in parallel, a comparison with satellite data of aerosol optical depth (AOD), was realized.
The second onsite and online sampling, took place at the same aforementioned site. Its duration was nearly a month from early January to early February 2013. PM1 suspended particles were collected. A PILS-IC coupled system was used for the field analysis. Main objective was the study of the effect of biomass burning, due to the economic crisis, on the aerosol chemistry of the greater Athens area. Ionic (including biomass burning tracers) concentration was measured and then compared with the concentration of organic compounds data, provided by an ACSM (Aerosol Chemical Speciation Monitor). An intercomparison of the concentration levels of chemical species that were measured in common from the two analytical instruments, was also realized.
Finally, ionic composition and organic and elemental carbon analysis were simultaneously carried out in three different sites, Istanbul, Finokalia and Imvros from April 2009 to February 2010. Objective of the samplings was the clarification of the effect of the two cities, mainly Istanbul, but also Athens, on the aerosol chemistry of the greater area. For the actualization of this objective, concentrations of natural and anthropogenic origin aerosols, from all three sampling sites were compared. Additionally, the results from the two urban and the two remote sites were separately compared. The comparison of the results from the two remote sites (Imvros, Finokalia) was the one that quantified the effect of the emissions of urban sites, on remote areas.
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Ο ρόλος των μεγαλουπόλεων της ανατολικής Μεσογείου στη χημική σύσταση του αερολύματος στην ατμόσφαιρα
