HR: 1330h
AN: A32A-0107    [PDF]
TI: Observations on the Exchange of Oxygenated Compounds and Isoprenoids Between Tropical Tree Species and the Atmosphere During Different Seasons and Developmental Stages
AU: * Rottenberger, S
EM: rottenbe@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Dept. Biogeochemistry Chemitry, Dept. Biogeochemistry, P.O. Box 3060, Mainz, 55128 Germany
AU: Kleiss, B
EM: kleiss@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Dept. Airchemistry, P.O. Box 3060, Mainz, 55128 Germany
AU: Kuhn, U
EM: kuhn@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Dept. Biogeochemistry Chemitry, Dept. Biogeochemistry, P.O. Box 3060, Mainz, 55128 Germany
AU: Ciccioli, P
EM: paolo.ciccioli@imc.cnr.it
AF: Instituto di Metodologie Chimiche, Area della Ricerca del CNR di Montelibretti, Monterotondo Scalo, 00019 Italy
AU: Kesselmeier, J
EM: jks@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Dept. Biogeochemistry Chemitry, Dept. Biogeochemistry, P.O. Box 3060, Mainz, 55128 Germany
AB: The terrestrial vegetation is the dominant source ($>$80%) for atmospheric volatile organic compounds (VOCs) on a global scale. These trace gases (i) influence the production or atmospheric lifetimes of air pollutants and greenhouse gases such as ozone, carbon monoxide, and methane, (ii) are involved in aerosol particle growth and production and (iii) contribute to the carbon budget of plants and ecosystems. Seasonal events may have significant impact on the exchange of VOCs between vegetation and the atmosphere. We report about the contrasting behaviour of tropical floodplain species in comparison to terra firma trees and the differences of emission quality and quantity of tree species during the wet and dry season in Amazonia. VOC emission changes in terms of quality (for example isoprenoid composition) or quantity (emission factors) and should be considered for an accurate estimation of the annual VOC release from tropical vegetation. Furthermore results from measurements on a deciduous Amazonian tree species demonstrate pronounced variations in the VOC exchange pattern depending on the developmental stage of the leaves.
DE: 0315 Biosphere/atmosphere interactions
DE: 0322 Constituent sources and sinks
DE: 0365 Troposphere--composition and chemistry
DE: 1615 Biogeochemical processes (4805)
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting