Berlin 2005 – wissenschaftliches Programm

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UP: Umweltphysik

UP 14: Klima und Atmosph
äre

UP 14.2: Fachvortrag

Mittwoch, 9. März 2005, 14:00–14:15, TU HFT101

Enhanced SO2 Column Densities Over South Asian Region Consequence of El Nino — •Muhammad Fahim Khokhar, T. Marbach, U. Platt, and Thomas Wagner — Institute of Environmental Physics, Heidelberg, GERMANY

Sulfur Dioxide is an important trace species released to the troposphere as a result of both anthropogenic and natural phenomena. Among natural sources it is liberated by the oxidation of organic material in soils, the oxidation of Dimethylsulfide and H2S over oceans, volcanic eruptions, and biomass burning. Changes in the global atmospheric circulation patterns caused by El Nino bring about weather extremes in various parts of the world. These patterns result in inhibiting rainfall over the western pacific equatorial region especially Indonesia, Malaysia and North of Australia and finally resulting in a lot of biomass burning events and droughty conditions over this region. Satellites are powerful tool to monitor such kind of phenomena on temporal and spatial scales. In this work we give a comprehensive overview on the retrieval of SO2 column densities from GOME data for the years 1996 to 2002. GOME is a moderate spectral resolution spectrometer enables us to apply the Differential Optical Absorption Spectroscopy algorithm to retrieve SO2 column densities from radiance and irradiance measurements in the UV spectral region. Results showed enhanced SO2 column densities over South Asian region which strongly correlate to the strong El Nino event in the year 1997-98.