Berlin 2005 – wissenschaftliches Programm

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UP: Umweltphysik

UP 6: Poster: Aerosole

UP 6.12: Poster

Dienstag, 8. März 2005, 10:15–12:15, Poster TU HTF

SOURCES OF FORMALDEHYDE: TRACE GAS EMISSIONS FROM AGRICULTURAL FIRES IN NORTHERN ITALY — •Claudia Hak, Kai-Uwe Mettendorf, Achim Bäuerle, Christian Kunz, Ulrich Platt, and Irene Pundt — Institut für Umweltphysik, Universität Heidelberg

Simultaneous measurements of CH2O, NO2, SO2, O3, and HONO were performed with the Multibeam-Longpath-DOAS (Differential Optical Absorption Spectroscopy) method during a field campaign in Lombardia (Italy). The measurements shown focus on the investigation of formaldehyde, an important source of odd hydrogen radicals and hence a precursor of tropospheric ozone. The campaign was part of the European project FORMAT (FORMaldehyde As a Tracer of photooxidation in the troposphere) and took place at three sites in the greater Milano area. Here, we concentrate on one site located at the river Po 40 km south of Milano.

The Po Basin is an area of intensive agricultural and industrial activity. In autumn after harvesting the stubble fields are burnt down forming a considerable local source for hydrocarbons and other gases of interest. The emissions of formaldehyde and sulphur dioxide (SO2) by several fire events are examined in this study.