Berlin 2005 – wissenschaftliches Programm

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UP: Umweltphysik

UP 3: Atmosph
ärische Spurengase und Aerosole: Intrumentelles I

UP 3.1: Fachvortrag

Montag, 7. März 2005, 14:30–14:45, TU TA201

Identification of tropospheric emissions sources from satellite observations: Synergistic use of HCHO and NO2 trace gas measurements — •Thierry Marbach, Steffen Beirle, Ulrich Platt, and Thomas Wagner — Institut für Umweltphysik, 69120 Heidelberg

We present case studies for combined HCHO and NO2 satellite observations, derived from GOME instrument measurements. Launched on the ERS-2 satellite in April 1995, GOME has already performed continuous operations over 8 years providing global observations of the different trace gases. The satellite HCHO observations provide information concerning the localization of biomass burning (intense source of HCHO). The principal biomass burning areas can be observed in the Amazon basin region and in central Africa. Other high HCHO emissions can be correlated with climatic events like the El Nino in 1997, which induced dry conditions in Indonesia causing many forest fires. Tree isoprene emissions could also contribute to high HCHO concentrations especially in southwest United States, northern part of the Amazon basin, and in the African tropical rain forest region. Biomass burning are also an important tropospheric source for NO2 emissions and can be compared with the HCHO emissions to discriminate the influence of the vegetation type on the tropospheric emissions of both trace gases during biomass burning: the change in the vegetation type can be followed with the change in the intensity of HCHO and NO2 emissions.