Emission and Chemical Transformation of Biogenic Volatile Organic Compounds(ECHO)- Investigation in and above a Mixed Forest Stand: An Overview

HR: 08:15h
AN: A21A-02 [PDF]
TI: Emission and Chemical Transformation of Biogenic Volatile Organic Compounds(ECHO)- Investigation in and above a Mixed Forest Stand: An Overview
AU: * Koppmann, R
EM: r.koppmann@fz-juelich.de
AF: Forschungszentrum Juelich, Institut fuer Chemie und Dynamik der Geosphaere, Institut II: Troposphaere, Leo-Brandt-Strasse, Juelich, 52425 Germany
AU: FZJ ECHO Team, .
AF: Forschungszentrum Juelich, Institut fuer Chemie und Dynamik der Geosphaere, Institut II: Troposphaere, Leo-Brandt-Strasse, Juelich, 52425 Germany
AU: Kesselmeier, J
AF: Max-Planck-Insitut fuer Chemie, Abt. Biogeochemie, Johann-J.-Becher-Weg 27, Mainz, 55020 Germany
AU: Meixner, F X
AF: Max-Planck-Insitut fuer Chemie, Abt. Biogeochemie, Johann-J.-Becher-Weg 27, Mainz, 55020 Germany
AU: MPI ECHO Team, .
AF: Max-Planck-Insitut fuer Chemie, Abt. Biogeochemie, Johann-J.-Becher-Weg 27, Mainz, 55020 Germany
AU: Warnke, J
AF: Institut fuer Spektrochemie und Angewandte Spektroskopie, Bunsen-Kirchhoff-Strasse 11, Dortmund, 44139 Germany
AU: Hoffmann, T
AF: Institut fuer Spektrochemie und Angewandte Spektroskopie, Bunsen-Kirchhoff-Strasse 11, Dortmund, 44139 Germany
AU: Aubrun, S
AF: Institut fuer Meteorologie, Universitaet Hamburg, Bundesstrasse 55, Hamburg, 20146 Germany
AU: Leitl, B
AF: Institut fuer Meteorologie, Universitaet Hamburg, Bundesstrasse 55, Hamburg, 20146 Germany
AU: Schatzmann, M
AF: Institut fuer Meteorologie, Universitaet Hamburg, Bundesstrasse 55, Hamburg, 20146 Germany
AU: Dlugi, R
AF: Arbeitsgruppe Atmosphaerische Prozesse, Gernotstrasse 11, Muenchen, 80804 Germany
AU: Zelger, M
AF: Arbeitsgruppe Atmosphaerische Prozesse, Gernotstrasse 11, Muenchen, 80804 Germany
AU: Kleffmann, J
AF: Bergische Universitaet Wuppertal, Fachbereich 9, Physikalische Chemie, Gaussstrasse 20, Wuppertal, 42119 Germany
AU: Neftel, A
AF: Eidgenoessische Forschungsanstalt fuer Oekologie und Landbau, Reckenholzstrasse 191, Zuerich, 8046 Switzerland
AU: Hansel, A
AF: Universitaet Innsbruck, Institut fuer Ionenphysik, Technker Strasse 25, Innsbruck, 6020 Austria
AU: Thomas, C
AF: Universitaet Bayreuth, Abt. Mikrometeorologie, Universitaetsstrasse 30, Bayreuth, 95440 Germany
AU: Neininger, B
AF: MetAir, Sonnenberg 27, Menzingen, 6313 Switzerland
AB: The objective of the ECHO project is to provide a better understanding of forest stands as a complex source of reactive trace gases into the troposphere. This will be achieved by a unique combination of field, laboratory, and simulation experiments investigating chemical and dynamical processes within the canopy and thus the forest stand as a net source of reactive trace compounds into the planetary boundary layer. The field experiments were carried out in the Stetternicher Forest on the area of the Research Center J〕ich. The area has been a deciduous forest for more than 300 years and is surrounded by farmland. Dominating tree species are oaks, beech, and birch. Prevailing wind direction is from the south west, more seldom from the south east. The site is only weakly influenced by urban air masses. At the site three towers were set up, which were equipped with a large set of instruments to measure micrometeorological parameters, biogenic and anthropogenic volatile organic compounds, ozone, nitrogen oxides, and CO, as well as radiation in and above the forest. Additionally, measurements of meteorological parameters were done at the meteorological tower up to a height of 120 m and with a SODAR-RASS system up to 300 m. The first field study took place between June 3 and July 12, 2002, the second field campaign between June 23 and August 1, 2003. As a speciality of the ECHO project, important aspects of the different processes determining the net emission from forest stands into the atmosphere are investigated in laboratory and simulation experiments. The chemical processing of the trace gas mixtures observed in the forest stand is investigated in the atmosphere simulation chamber SAPHIR under controlled conditions. This enables a detailed study of the chemical processes under exclusion of transport processes and sensitivity studies by direct modification of individual chemical parameters. Emission and uptake of VOC by plants are investigated in plant chambers under defined conditions. The soil as a source of nitrogen oxide is investigated in a lysimeter experiment. The flow dynamics of the forest site is investigated in detail in wind tunnel experiments using a 1:300 scale model of the field site.
UR: http://www.fz-juelich.de/icg/icg-ii/echo
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0315 Biosphere/atmosphere interactions
DE: 0322 Constituent sources and sinks
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting