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UP: Fachverband Umweltphysik
UP 9: Poster: Atmosphärische Spurengase und Aerosole: Instrumentelles
UP 9.4: Poster
Dienstag, 27. März 2007, 14:00–15:00, Poster C
Long term measurements of reactive halogen species, trace gases and aerosols by Multi Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) — •Jessica Balbo, Udo Frieß und Ulrich Platt — Institut für Umweltphysik, Heidelberg
Long-term observations of compounds playing a key role in the atmospheric chemistry are of great importance for the understanding of the chemical processes occurring on time scales ranging between minutes and years. Anthropogenically emitted pollutants, such as NOx and volatile organic compounds (VOCs) have an impact on the tropospheric ozone budget and can affect human health. On the other hand, it is also important to study the remote atmosphere in order to understand its chemical behaviour in the absence of man-made emissions. In recent years evidence has grown that halogen compounds emitted by the ocean can have a severe impact on the chemistry of the marine boundary layer, and possibly also on the ozone budget and thus climate on a global scale. To investigate the chemical composition of the atmosphere, two multi-axis DOAS instruments were set up at (1) the Global Atmospheric Watch (GAW) site in Hohenpeissenberg, Germany, and (2) at the new SOLAS observatory on the island of São Vicente, Cape Verde. The purpose of these long-term measurements is the investigation of tropospheric chemistry in polluted areas (Hohenpeissenberg) and in the remote marine boundary layer (Cape Verde). We will present an overview of the MAX-DOAS instrumentation and first results.