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| Titel |
The summertime Boreal forest field measurement intensive (HUMPPA-COPEC-2010): an overview of meteorological and chemical influences |
| VerfasserIn |
J. Williams, J. Crowley, H. Fischer, H. Harder, M. Martinez, T. Petäjä, J. Rinne, J. Bäck, M. Boy, M. Maso, J. Hakala, M. Kajos, P. Keronen, P. Rantala, J. Aalto, H. Aaltonen, J. Paatero, T. Vesala, H. Hakola, J. Levula, T. Pohja, Frank Herrmann, J. Auld, E. Mesarchaki, W. Song, N. Yassaa, A. Nölscher, A. M. Johnson, T. Custer, V. Sinha, J. Thieser, N. Pouvesle, D. Taraborrelli, M. J. Tang, H. Bozem, Z. Hosaynali-Beygi, R. Axinte, R. Oswald, A. Novelli, D. Kubistin, K. Hens, U. Javed, K. Trawny, C. Breitenberger, P. J. Hidalgo, C. J. Ebben, F. M. Geiger, A. L. Corrigan, L. M. Russell, H. G. Ouwersloot, J. Vilà-Guerau de Arellano, L. Ganzeveld, A. Vogel, M. Beck, A. Bayerle, C. J. Kampf, M. Bertelmann, F. Köllner, T. Hoffmann, J. Valverde, D. González, M.-L. Riekkola, M. Kulmala  , J. Lelieveld |
| 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. 20 ; Nr. 11, no. 20 (2011-10-27), S.10599-10618 |
| Datensatznummer |
250010146
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| Publikation (Nr.) |
 copernicus.org/acp-11-10599-2011.pdf |
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| Zusammenfassung |
| This paper describes the background, instrumentation, goals, and the
regional influences on the HUMPPA-COPEC intensive field measurement
campaign, conducted at the Boreal forest research station SMEAR II (Station
for Measuring Ecosystem-Atmosphere Relation) in Hyytiälä, Finland
from 12 July–12 August 2010. The prevailing meteorological conditions
during the campaign are examined and contrasted with those of the past six
years. Back trajectory analyses show that meteorological conditions at the
site in 2010 were characterized by a higher proportion of southerly flow
than in the other years studied. As a result the summer of 2010 was
anomalously warm and high in ozone making the campaign relevant for the
analysis of possible future climates. A comprehensive land use analysis,
provided on both 5 and 50 km scales, shows that the main vegetation types
surrounding the site on both the regional and local scales are: coniferous
forest (Scots pine and/or Norway spruce); mixed forest (Birch and conifers);
and woodland scrub (e.g. Willows, Aspen); indicating that the campaign
results can be taken as representative of the Boreal forest ecosystem. In
addition to the influence of biogenic emissions, the measurement site was
occasionally impacted by sources other than vegetation. Specific tracers
have been used here to identify the time periods when such sources have
impacted the site namely: biomass burning (acetonitrile and CO), urban
anthropogenic pollution (pentane and SO2) and the nearby Korkeakoski
sawmill (enantiomeric ratio of chiral monoterpenes). None of these sources
dominated the study period, allowing the Boreal forest summertime emissions
to be assessed and contrasted with various other source signatures. |
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