Bremen 2017 – wissenschaftliches Programm
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UP: Fachverband Umweltphysik
UP 5: Postersession
UP 5.6: Poster
Dienstag, 14. März 2017, 16:40–18:10, GW2 B3010
Inter-comparison of glyoxal vertical columns retrieved from SCIAMACHY, OMI, GOME-2 (A and B) instruments — •Leonardo M. A. Alvarado1, Andreas Richter1, Andreas Hilboll1,2, Mihalis Vrekoussis1,2, Jonh P. Burrows1, Stelios Myriokefalitakis3, and Maria Kanakidou3 — 1Institute of Environmental Physics, University of Bremen, Bremen, Germany — 2Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany — 3Environmental Chemical Processes Laboratory, University of Crete, Heraklion, Greece
Glyoxal is an intermediate product in the oxidation process of most VOC and an indicator of secondary aerosol formation in the atmosphere. Similar to other VOC, glyoxal is mainly emitted from natural processes, however has also a significant contribution from fires and anthropogenic sources. Since many years the number of retrievals of glyoxal abundances from satellite instruments using the DOAS method has increased. Most recently, some studies focused on improving the retrieval of glyoxal from different satellite measurements in order to reduce the uncertainties in the glyoxal columns and in estimation of VOC emissions. This study focuses on a new homogenized glyoxal product using AMF computed based on profiles simulated with the TM4-ECPL chemistry transport model. This retrieval algorithm is applied to (a) SCIAMACHY, (b) OMI, and (c) the two GOME-2 (A and B). Overall, the retrieved glyoxal column amounts from the homogenized retrieval algorithm show similar seasonal behavior among the instruments over selected regions.