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Experiments on forest/atmosphere exchange : climatology and fluxes during two summer campaigns in NE Bavaria

Title data

Klemm, Otto ; Held, Andreas ; Forkel, Renate ; Gasche, Rainer ; Kanter, H.-J. ; Rappenglück, Bernhard ; Steinbrecher, Rainer ; Müller, Konrad ; Plewka, A. ; Cojocariu, C. ; Kreuzwieser, Jürgen ; Valverde-Canossa, Jessica ; Schuster, G. ; Moortgat, Geert K. ; Graus, Martin ; Hansel, Armin:
Experiments on forest/atmosphere exchange : climatology and fluxes during two summer campaigns in NE Bavaria.
In: Atmospheric Environment. Vol. 40 (2006) Issue Suppl. 1 . - pp. 3-20.
ISSN 1352-2310
DOI: https://doi.org/10.1016/j.atmosenv.2006.01.060

Abstract in another language

During two summer field campaigns in 2001 and 2002, biosphere/atmosphere exchange fluxes of energy, gases, and particles were quantified in a Norway spruce forest in NE Bavaria at 775m a.s.l. The overall goal of the BEWA campaigns was to study the influence of the emissions of reactive biogenic volatile organic compounds (BVOCs) on chemical and physical processes in the atmosphere, and an overview over the meteorological conditions, experimental frame, and the achieved results is provided. A rigorous quality assurance/quality control plan was implemented. From analysis of meteorological conditions and experimental success, golden day periods were selected for coordinated data analysis. These periods cover typical summertime conditions with various wind directions, NOx mixing ratios between 2 and 10 ppb, and O3 mixing ratios ranging between 13 and 98 ppb. Diurnal patterns of trace gas concentrations resulted from the dynamics of the boundary layer, from regional atmospheric processes (for example production of O3 in the atmosphere), and deposition. Turbulence also exhibited a diurnal pattern indicating thermal production during daytime and calm conditions during nighttime. However, in many cases, turbulence was often well developed during the nights. Horizontal advection ofair masses into the trunk space occurred due to the patchiness of the forest. Nevertheless, for most conditions, theapplication of a one-dimensional model to describe the vertical exchange processes was appropriate. Therefore, the use of one single meteorological tower to study biosphere/atmosphere exchange is valid. Measured turbulent vertical exchange fluxes were estimated to be representative within an error of less than 25%. The results for VOC concentrations and fluxes were rather heterogeneous. Both model and measurements demonstrated that the Norway spruce trees acted as a weak source of formaldehyde.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER39375
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Professorship Micrometeorology - Univ.-Prof. Dr. Thomas Foken
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Atmospheric Chemistry
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 11 Sep 2015 06:33
Last Modified: 13 Apr 2018 09:56
URI: https://eref.uni-bayreuth.de/id/eprint/19171