Size resolved mass concentration and elemental composition of atmospheric aerosols over the Eastern Mediterranean area

[摘要] A Berner low pressure impactor was used to collect size-segregated aerosol samples atFinokalia, located on the north-eastern coast of Crete, Greece during July 2000 and January 2001.Several samples were also collected during the summer campaign aboard the research vessel"AEGAIEO" in the Aegean Sea. Gravimetric analysis and inversion techniques yielded daily PM1 andPM10 mass concentrations. The samples were also analysed by PIXE giving the elemental sizedistributions of Al, Si, K, Ca, Ti, Mn, Fe, Sr, S, Cl, Ni, V, Cu, Cr, Zn, and Pb. The crustal elementsand sea-salt had a unimodal supermicron size distribution. Sulphur was found predominantly insubmicron fractions. K, V, and Ni exhibited a bimodal distribution with a submicron mode producedby forest fires and oil combustion. The anthropogenic elements had broad and not well-defineddistributions. The time series for PM1 and PM10 mass and elemental concentrations showed bothdaily and seasonal variation. Higher mass concentrations were observed during two incursions ofSaharan dust, whilst higher concentrations of S, Cu, Zn, and Pb were encountered in samples collectedin air masses arriving from northern Greece or the western coast of Turkey. Elevated concentrations ofchlorine were found in samples with air masses either originating above the Atlantic Ocean andarriving at Finokalia via western Europe or recirculating over the western coast of the Black Sea.

[学科分类] 大气科学