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| Titel |
The summer aerosol in the central Arctic 1991–2008: did it change or not? |
| VerfasserIn |
J. Heintzenberg, C. Leck |
| 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 ; 12, no. 9 ; Nr. 12, no. 9 (2012-05-04), S.3969-3983 |
| Datensatznummer |
250011114
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| Publikation (Nr.) |
 copernicus.org/acp-12-3969-2012.pdf |
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| Zusammenfassung |
| In the course of global warming dramatic changes are taking place in the Arctic and boreal
environments. However, physical aerosol data in from the central summer Arctic taken over
the course of 18 yr from 1991 to 2008 do not show systematic year-to-year changes, albeit
substantial interannual variations. Besides the limited extent of the data several causes may
be responsible for these findings. The processes controlling concentrations and particle size
distribution of the aerosol over the central Arctic perennial pack ice area, north of 80°, may
not have changed substantially during this time. Environmental changes are still mainly
effective in the marginal ice zone, the ice-free waters and continental rims and have not
propagated significantly into the central Arctic yet where they could affect the local aerosol
and its sources. The analysis of meteorological conditions of the four expedition summers
reveal substantial variations which we see as main causes of the measured variations in
aerosol parameters. With combined lognormal fits of the hourly number size distributions of
the four expeditions representative mode parameters for the summer aerosol in the central
Arctic have been calculated. The combined aerosol statistics discussed in the present paper
provide comprehensive physical data on the summer aerosol in the central Arctic. These data
are the only surface aerosol information from this region. |
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