 |
| Titel |
Size-segregated aerosol mass closure and chemical composition in Monte Cimone (I) during MINATROC |
| VerfasserIn |
J.-P. Putaud, R. Dingenen, A. Dell'Acqua, F. Raes, E. Matta, S. Decesari, M. C. Facchini, S. Fuzzi |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 4, no. 4 ; Nr. 4, no. 4 (2004-06-21), S.889-902 |
| Datensatznummer |
250001826
|
| Publikation (Nr.) |
 copernicus.org/acp-4-889-2004.pdf |
|
|
|
|
|
| Zusammenfassung |
| Physical and chemical characterizations of the atmospheric aerosol were
carried out at Mt. Cimone (Italy) during the 4 June-4 July 2000 period.
Particle size distributions in the size range 6nm-10µm were measured
with a differential mobility analyzer (DMA) and an optical particle counter
(OPC). Size-segregated aerosol was sampled using a 6-stage low pressure
impactor. Aerosol samples were submitted to gravimetric and chemical
analyses. Ionic, carbonaceous and refractory components of the aerosol were
quantified. We compared the sub- and superµm aerosol mass
concentrations determined by gravimetric measurements (mGM), chemical
analyses (mmCA), and by converting particle size distribution to aerosol
mass concentrations (mmSD). Mean random uncertainties associated with
the determination of mmGM, mmCA, and mmSD were assessed. The
three estimates of the sub-µm aerosol mass concentration agreed, which
shows that within experimental uncertainty, the sub-µm aerosol was
composed of the quantified components. The three estimates of the super-µm
aerosol mass concentration did not agree, which indicates that random
uncertainties and/or possible systematic errors in aerosol sampling, sizing
or analyses were not adequately accounted for. Aerosol chemical composition
in air masses from different origins showed differences, which were
significant in regard to experimental uncertainties. During the Saharan dust
advection period, coarse dust and fine anthropogenic particles were
externally mixed. No anthropogenic sulfate could be found in the super-µm
dust particles. In contrast, nitrate was shifted towards the aerosol
super-µm fraction in presence of desert dust. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|