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Identifier

000372434

Title

Υδατοδιαλυτός άνθρακας στην ατμόσφαιρα της Α. Μεσογείου

Alternative Title

Water soluble carbon in the Eastern Mediterranean atmosphere

Author

Αντωνίου, Μαρία Ιωακείμ

Thesis advisor

Μιχαλόπουλος, Νικόλαος

Abstract

The present work focuses on the study of the water soluble organic carbon (WSOC) fraction of aerosols in the Eastern Mediterranean atmosphere. For size-resolved distribution of WSOC a 12-stage small deposit area low volume impactor (SDI) was used. The measurements took place at a natural marine place from July 2004 to September 2006. The WSOC size distribution measurements were completed with the chemical analysis of inorganic ions (SO₄^2- and NH₄⁺) and Organic Carbon (OC). WSOC was analyzed using a total-organic carbon analyzer TOC-V_CSH from Shimadzou and Ions were measured by Ion Chromatography. Quartz filters were analyzed for OC with the thermal optical transmission method, using a carbon analyzer developed by Sunset Laboratory Inc. Both water soluble organic carbon and ions depict a distinct seasonal variability characterized by summer maximum and winter minimum concentrations. Large fraction of WSOC during summer is assumed to be of secondary origin as it is formed from enhanced atmospheric photo-oxidation during this season. A large fraction of WSOC 77% was found in fine mode and the largest part of total mass of the WSOC (30,5%) is assigned to particles in the accumulation mode (0,3-0,6 μm), coming from combustion (fossil fuel but also biomass burning), arriving at the area from Central and Northeastern Europe and countries surrounding the Black Sea.

Language

Greek

Subject

Ammonium

Size distribution

Sulphates

Ανατολική Μεσόγειος

Θειϊκά προϊόντα

Ιόντα του αμμωνίου

Κατά μέγεθος κατανομή

Υδατοδιαλυτός οργανικός άνθρακας

Issue date