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| Titel |
Temperature influence on the natural aerosol budget over boreal forests |
| VerfasserIn |
L. Liao, V.-M. Kerminen, M. Boy, M. Kulmala  , M. Dal Maso |
| 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 ; 14, no. 16 ; Nr. 14, no. 16 (2014-08-19), S.8295-8308 |
| Datensatznummer |
250118956
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| Publikation (Nr.) |
 copernicus.org/acp-14-8295-2014.pdf |
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| Zusammenfassung |
| We investigated the natural aerosol evolution of biogenic monoterpene
emissions over the northern boreal forest area as a function of temperature
using long-term field measurements of aerosol size distributions and back
trajectories at two SMEAR (Station for Measuring Ecosystem–Atmosphere
Relations) stations, SMEAR I and SMEAR II, in Finland. Similar to
earlier studies, we found that new particles were formed via nucleation when
originally clean air from the ocean entered the land, after which these
particles continuously grew to larger sizes during the air mass transport.
Both the travelling hour over land and temperature influenced the evolution
of the particle number size distribution and aerosol mass yield from biogenic
emissions. Average concentrations of nucleation mode particles were higher at
lower temperatures, whereas the opposite was true for accumulation mode
particles. Thus, more cloud condensation nuclei (CCN) may be formed at higher temperatures. The overall
apparent aerosol yield, derived from the aerosol masses against accumulated
monoterpene emissions, ranges from 13 to 37% with a minor, yet complicating,
temperature dependence. |
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