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| Titel |
Long-term measurements of carbonaceous aerosols in the Eastern Mediterranean: evidence of long-range transport of biomass burning |
| VerfasserIn |
J. Sciare, K. Oikonomou, O. Favez, E. Liakakou, Z. Markaki, H. Cachier, N. Mihalopoulos |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 8, no. 18 ; Nr. 8, no. 18 (2008-09-17), S.5551-5563 |
| Datensatznummer |
250006383
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| Publikation (Nr.) |
 copernicus.org/acp-8-5551-2008.pdf |
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| Zusammenfassung |
| Long-term (5-year) measurements of Elemental Carbon (EC) and Organic Carbon
(OC) in bulk aerosols are presented here for the first time in the
Mediterranean Basin (Crete Island). A multi-analytical approach (including
thermal, optical, and thermo-optical techniques) was applied for these EC
and OC measurements. Light absorbing dust aerosols were shown to poorly
contribute (+12% on a yearly average) to light absorption coefficient
(babs) measurements performed by an optical method (aethalometer).
Long-range transport of agricultural waste burning from European countries
surrounding the Black Sea was shown for each year during two periods
(March–April and July–September). The contribution of biomass burning to the
concentrations of EC and OC was shown to be rather small (20 and 14%,
respectively, on a yearly basis), although this contribution could be much
higher on a monthly basis and showed important seasonal and interannual
variability. By removing the biomass burning influence, our data revealed an
important seasonal variation of OC, with an increase by almost a factor of
two for the spring months of May and June, whereas BC was found to be quite
stable throughout the year. Preliminary measurements of Water Soluble
Organic Carbon (WSOC) have shown that the monthly mean WSOC/OC ratio remains
stable throughout the year (0.45±0.12), suggesting that the
partitioning between water soluble and water insoluble organic matter is not
significantly affected by biomass burning and secondary organic aerosol
(SOA) formation. A chemical mass closure performed in the fine mode
(Aerodynamic Diameter, A.D.<1.5μm) showed that the mass
contribution of organic matter (POM) was found to be essentially invariable
during the year (monthly average of 26±5%). |
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