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Coupling processes and exchange of energy and reactive and non-reactive trace gases at a forest site - Results of the EGER experiment

Foken, T.; Meixner, F. X.; Falge, E.; Zetzsch, C.; Serafimovich, A.; Bargsten, A.; Behrendt, T.; Biermann, T. LU ; Breuninger, C. and Dix, S., et al. (2012) In Atmospheric Chemistry and Physics 12(4). p.1923-1950
Abstract

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... (More)

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. © 2012 Author(s).

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publishing date
type
Contribution to journal
publication status
published
subject
in
Atmospheric Chemistry and Physics
volume
12
issue
4
pages
28 pages
publisher
Copernicus Gesellschaft Mbh
external identifiers
  • Scopus:84873046910
ISSN
1680-7316
DOI
10.5194/acp-12-1923-2012
language
English
LU publication?
no
id
1216d7ba-49f3-4977-b933-e4da7ce53af8
date added to LUP
2016-07-13 10:38:45
date last changed
2016-11-03 08:29:03
@misc{1216d7ba-49f3-4977-b933-e4da7ce53af8,
  abstract     = {<p>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, NO<sub>2</sub>, O<sub>3</sub>, 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. © 2012 Author(s).</p>},
  author       = {Foken, T. and Meixner, F. X. and Falge, E. and Zetzsch, C. and Serafimovich, A. and Bargsten, A. and Behrendt, T. and Biermann, T. and Breuninger, C. and Dix, S. and Gerken, T. and Hunner, M. and Lehmann-Pape, L. and Hens, K. and Jocher, G. and Kesselmeier, J. and Lüers, J. and Moravek, A. and Plake, D. and Riederer, M. and Rütz, F. and Scheibe, M. and Siebicke, L. and Sörgel, M. and Staudt, K. and Trebs, I. and Tsokankunku, A. and Welling, M. and Wolff, V. and Zhu, Z.},
  issn         = {1680-7316},
  language     = {eng},
  number       = {4},
  pages        = {1923--1950},
  publisher    = {ARRAY(0xb2d39a0)},
  series       = {Atmospheric Chemistry and Physics},
  title        = {Coupling processes and exchange of energy and reactive and non-reactive trace gases at a forest site - Results of the EGER experiment},
  url          = {http://dx.doi.org/10.5194/acp-12-1923-2012},
  volume       = {12},
  year         = {2012},
}