Bremen 2017 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 5: Postersession

UP 5.32: Poster

Dienstag, 14. März 2017, 16:40–18:10, GW2 B3010

Satellite Remote Sensing of Halogens in the Arctic Troposphere — •Ilias Bougoudis, Anne-Marlene Blechschmidt, Andreas Richter, Anja Schoenhardt, and John Burrows — University of Bremen

Halogens play a key role in the atmospheric composition of the Arctic atmosphere. They deplete the major greenhouse gas, Ozone which also is a precursor of OH and thereby potentially change radiative properties and temperature, as well as the oxidizing capacity of the Arctic atmosphere. Previous studies have shown that the recent temperature increase due to climate change is more pronounced in the Arctic compared to other parts of the globe, a phenomenon known as Arctic Amplification. Our primary goal is to investigate if Arctic Amplification affects tropospheric concentrations of halogens in the Arctic during recent years, and how these changes are related to changes of parameters regarded as crucial for release of halogens into the troposphere such as sea ice conditions, oceanic phytoplankton, temperature and wind speed. To assess this goal, satellite retrievals of halogens from different UV-VIS satellite sensors will be used. Preliminary results on inter-comparing already existing satellite retrievals of BrO from GOME-2 and SCIAMACHY are presented, indicating a need to improve the retrievals in order to study the evolution of halogens in the Arctic in time under Arctic Amplification.