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| Titel |
Aerosol particle number size distributions and particulate light absorption at the ZOTTO tall tower (Siberia), 2006–2009 |
| VerfasserIn |
J. Heintzenberg, W. Birmili, R. Otto, M. O. Andreae, J.-C. Mayer, X. Chi, A. Panov |
| 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 ; 11, no. 16 ; Nr. 11, no. 16 (2011-08-25), S.8703-8719 |
| Datensatznummer |
250010030
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| Publikation (Nr.) |
 copernicus.org/acp-11-8703-2011.pdf |
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| Zusammenfassung |
| This paper analyses aerosol particle number size distributions, particulate
absorption at 570 nm wavelength and carbon monoxide (CO) measured
between September 2006 and January 2010 at heights of 50 and 300 m at
the Zotino Tall Tower Facility (ZOTTO) in Siberia (60.8° N;
89.35° E). Average number, surface and volume concentrations are
broadly comparable to former studies covering shorter observation periods.
Fits of multiple lognormal distributions yielded three maxima in probability
distribution of geometric mean diameters in the Aitken and accumulation size
range and a possible secondary maximum in the nucleation size range below
25 nm. The seasonal cycle of particulate absorption shows maximum
concentrations in high winter (December) and minimum concentrations in
mid-summer (July). The 90th percentile, however, indicates a
secondary maximum in July/August that is likely related to forest fires. The
strongly combustion derived CO shows a single winter maximum and a late
summer minimum, albeit with a considerably smaller seasonal swing than the
particle data due to its longer atmospheric lifetime. Total volume and even
more so total number show a more complex seasonal variation with maxima in
winter, spring, and summer. A cluster analysis of back trajectories and
vertical profiles of the pseudo-potential temperature yielded ten clusters
with three levels of particle number concentration: Low concentrations in
Arctic air masses (400–500 cm−3), mid-level concentrations for zonally
advected air masses from westerly directions between 55° and
65° N (600–800 cm−3), and high concentrations for air masses
advected from the belt of industrial and population centers in Siberia and
Kazakhstan (1200 cm−3). The observational data is representative for
large parts of the troposphere over Siberia and might be particularly useful
for the validation of global aerosol transport models. |
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