E-Locus - Institutional Repository of the University of Crete

Home Search

Results - Details

Search command : Author="Μιχαλόπουλος" And Author="Νικόλαος"

Current Record: 61 of 85

[Add to Basket]

Identifier

000369978

Title

Οργανικός και στοιχειακός άνθρακας στην Α. Μεσόγειο και Μαύρη Θάλασσα

Alternative Title

Organic and elemental carbon in E. Mediterranean and Black Sea

Author

Σμουλιώτης, Δημήτριος Αστ.

Thesis advisor

Μιχαλόπουλος, Νικόλαος

Abstract

The present work is focused on the study of the organic and water-soluble organic fraction of aerosols in the atmosphere of Eastern Mediterranean and Black Sea. More concretely in Istanbul, where the period of sampling took place from August 2009 to February 2010, in Imbros and Sinop from April 2009 to February 2010, and in Erdemli from June 2009 to March 2010. The study of the trajectories showed that in the four regions the northern and north-western winds prevail also in percentage from 43%-60%, while in the region of Erdemli the contribution of southern air masses it found to be also important. Both organic and elemental carbon in the region of Istanbul, Sinop and Erdemli depict a distinct seasonal variability characterized by summer minimum and winter maximum concentrations, while in the region of Imbros it is observed the opposite seasonal variability. In all the studied regions, the bigger part of the total organic mass found to be secondary, with the bigger percentage in Imbros, Sinop and Erdemli (86%±2%), and the smaller (64%) in Istanbul because of the increased anthropogenic emissions. The total organic mass and the elemental carbon constitute a very big part in the total mass of PM10 of the measured samples, (30% of POM and 11% EC in Istanbul, 33% of POM and 5% of EC in Imbros), while in Sinop and in Erdemli of relatively least (23% of POM and 2% of EC, 21% POM and 4% EC respectively). The correlation that was realized between organic and elemental carbon with no-sea-salt Potassium, showed that the sources of the organic and elemental carbon in Istanbul are owed mainly in combustions of fossil-fuels and by the vehicular exhausts, while in Sinop from the combustion of biomass burning. The percentage of water-soluble organic carbon range from 37-40% of the organic carbon for the three removed regions, while the percentage of total water-soluble organic mass in total mass of PM₁₀ range from 13-24%. On the contrary in Istanbul it constitutes the 27% of organic carbon and the 10% of the total mass PM₁₀.

Language

Greek

Subject

PM10

Water soluble organic carbon

Μεσόγειος Θάλασσα

Οργανικά αερολύματα

Υδατοδιαλυτός οργανικός άνθρακας

Issue date

2011-07-29

Collection

School/Department--School of Sciences and Engineering--Department of Chemistry--Post-graduate theses