HR: 08:00h
AN: A21A-01 INVITED     [PDF]
TI: Seasonality affects the Emission of Biogenic Volatile Organic Compounds (VOC): Results from Studies within LBA and ECHO
AU: * Kesselmeier, J
EM: jks@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Biogeochemistry Department, Joh.-J.-Becher Weg 27, Mainz, 55128 Germany
AB: Seasonality exhibits large amplitudes in temperate forests. This is easily observed and well described for plant anatomical/morphological, cytological, and physiological attributes. Also the emissions of volatile organic compounds may exhibit a clear seasonality from low or zero emissions in winter to high emissions in summer. In contrast seasonality of tropical vegetation is classified as relatively indistinct. However, tropical climate does not mean constant environmental conditions, but also shows seasonality, i.e. dry and wet or flooding seasons. Short term environmental (climatic) effects may intensify seasonal fluctuations of VOC emissions triggered by temperature, light, water availability, developmental status and plant diseases. Recent results obtained in the course of LBA-EUSTACH (EUropean Studies on Trace gases and Atmospheric CHemistry as a contribution to the Large-scale Biosphere-Atmosphere experiment in Amazonia) and ECHO (Emission and Chemical Transformation of Biogenic Volatile Organic Compounds) are discussed.
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