 |
| Titel |
Coupling processes and exchange of energy and reactive and non-reactive trace gases at a forest site – results of the EGER experiment |
| VerfasserIn |
T. Foken, F. X. Meixner, E. Falge, C. Zetzsch, A. Serafimovich, A. Bargsten, T. Behrendt, T. Biermann, C. Breuninger, S. Dix, T. Gerken, M. Hunner, L. Lehmann-Pape, K. Hens, G. Jocher, J. Kesselmeier, J. Lüers, J.-C. Mayer, A. Moravek, D. Plake, M. Riederer, F. Rütz, M. Scheibe, L. Siebicke, M. Sörgel, K. Staudt, I. Trebs, A. Tsokankunku, M. Welling, V. Wolff, Z. Zhu |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 12, no. 4 ; Nr. 12, no. 4 (2012-02-17), S.1923-1950 |
| Datensatznummer |
250010732
|
| Publikation (Nr.) |
 copernicus.org/acp-12-1923-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| To investigate the energy, matter and reactive and non-reactive trace gas
exchange between the atmosphere and a spruce forest in the German mountain
region, two intensive measuring periods were conducted at the FLUXNET site
DE-Bay (Waldstein-Weidenbrunnen) in September/October 2007 and June/July 2008. They were part of the
project "ExchanGE processes in mountainous Regions" (EGER). Beyond a brief
description of the experiment, the main focus of the paper concerns the
coupling between the trunk space, the canopy and the above-canopy
atmosphere. Therefore, relevant coherent structures were analyzed for
different in- and above canopy layers, coupling between layers was
classified according to already published procedures, and gradients and
fluxes of meteorological quantities as well as concentrations of
non-reactive and reactive trace compounds have been sorted along the
coupling classes. Only in the case of a fully coupled system, it could be
shown, that fluxes measured above the canopy are related to gradients
between the canopy and the above-canopy atmosphere. Temporal changes of
concentration differences between top of canopy and the forest floor,
particularly those of reactive trace gases (NO, NO2, O3, and HONO)
could only be interpreted on the basis of the coupling stage. Consequently,
only concurrent and vertically resolved measurements of micrometeorological
(turbulence) quantities and fluxes (gradients) of trace compounds will lead
to a better understanding of the forest-atmosphere interaction. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|