Author(s)

Renate Forkel, William R. Stockwell and Rainer Steinbrecher

Abstract

Multilayer Canopy/Chemistry Model to Simulate the Effect of In-Canopy Processes on the Emission Rates of Biogenic VOCs A contribution to subproject GENEMIS Renate Forkel, William R Stockwell and Rainer Steinbrecher Fraunhofer Institut fur Atmospharische Umweltforschung, Kreuzeckbahnstr. 19, D-82467 Garmisch-Partenkirchen, Germany Introduction The emission of organic hydrocarbons from forests plays an important role in the regional production of ozone and other photo-oxidants. The flux of biogenic hydrocarbons, such as isoprene and monoterpenes, into the atmosphere are of major importance for three dimensional air quality modelling. The emission rates for biogenic VOC (BVOC) from trees are mostly directly measured from on a leaf or branch basis. This emission may not reflect the true emission into the boundary layer because deposition and chemical reactions within and directly above the forest canopy can affect the

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