HR: 12:05h
AN: A21F-08    [PDF]
TI: Towerbased and Airborne VOC Flux Measurements Over the Amazonian Rainforest During LBA-CLAIRE 2001
AU: * Kuhn, U
EM: kuhn@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Biogeochemistry Dept., Joh.-J.-Becherweg 27, Mainz, 55128 Germany
AU: Dindorf, T
EM: dindorf@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Biogeochemistry Dept., Joh.-J.-Becherweg 27, Mainz, 55128 Germany
AU: Thielmann, A
EM: athielm@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Biogeochemistry Dept., Joh.-J.-Becherweg 27, Mainz, 55128 Germany
AU: Meixner, F X
EM: meixner@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Biogeochemistry Dept., Joh.-J.-Becherweg 27, Mainz, 55128 Germany
AU: Andreae, M O
EM: andreae@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Biogeochemistry Dept., Joh.-J.-Becherweg 27, Mainz, 55128 Germany
AU: Ganzeveld, L
EM: ganzevl@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Air Chemistry Dept., Joh.-J.-Becherweg 27, Mainz, 55128 Germany
AU: Kolle, O
EM: okolle@bgc-jena.mpg.de
AF: Max Planck Institute for Biogeochemistry, Hans-Kn”ll-Straáe 10, Jena, 07745 Germany
AU: Lloyd, J
EM: jlloyd@bgc-jena.mpg.de
AF: Max Planck Institute for Biogeochemistry, Hans-Kn”ll-Straáe 10, Jena, 07745 Germany
AU: Stefani, P
EM: pstefani@tus001.unitus.it
AF: University of Tuscia, Department of Forest Science and Environment, Via de Lellis, Viterbo, 01100 Italy
AU: Ciccioli, P
EM: paolo.ciccioli@imc.cnr.it
AF: Istituto di Metodologie Chimiche, Area della Ricerca del CNR di Montelibretti, Via Salaria km 29.300, Monterotondo Scalo, 00019 Italy
AU: Vanni Gatti, L
EM: lvgatti@net.ipen.br
AF: IPEN, CQMA, Divisao de Quimica Ambiental, Av. Lineu Pretes, 2242, Sao Paulo, 05508-900 Brazil
AU: Nobre, A
EM: anobre27@yahoo.com
AF: Instituto Nacional de Pesquisas da Amazonia (INPA), Av. Andre Araujo, 2936, Manaus, 69083-000 Brazil
AU: Araujo, A C
EM: arau@geo.vu.nl
AF: Instituto Nacional de Pesquisas da Amazonia (INPA), Av. Andre Araujo, 2936, Manaus, 69083-000 Brazil
AU: Guenther, A
EM: guenther@ucar.edu
AF: National Center for Atmospheric Research, Atmospheric Chemistry Division, 1850 Table Mesa Dr., Boulder, CO 80307 United States
AU: Kesselmeier, J
EM: jks@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Biogeochemistry Dept., Joh.-J.-Becherweg 27, Mainz, 55128 Germany
AB: Volatile organic compounds (VOC) have a major influence on the atmospheric oxidative capacity, greenhouse gas concentrations, and the formation of aerosols, which implies a crucial role of VOC in climate forcing. Even though tropical vegetation has a major impact on global VOC emission strength, these regions have been the least investigated to date, and flux estimates have high uncertainties. During the LBA-CLAIRE 2001 project (Cooperative LBA Airborne Regional Experiment 2001, as part of the Large Scale Biosphere-Atmosphere Experiment in Amazonia), canopy-scale and landscape-scale VOC fluxes were estimated for a remote tropical rainforest site north of Manaus, using different measurement techniques. Above-canopy fluxes were investigated simultaneously with surface layer gradients and relaxed eddy accumulation measurements from a 52-m tower. Airborne measurements of vertical profiles of VOC mixing ratios from 100m to 3000m were used to estimate flux rates on a regional scale. Chemical processes in the model estimates were constrained with measured values of O3, NOx and VOC. VOC flux rates will be compared with CO2 fluxes, which were determined by similar procedures.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0315 Biosphere/atmosphere interactions
DE: 0322 Constituent sources and sinks
DE: 0400 Biogeosciences
DE: 1615 Biogeochemical processes (4805)
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting