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Bremen 2017 – scientific programme

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UP: Fachverband Umweltphysik

UP 9: Atmosphäre - Spurengase

UP 9.2: Invited Talk

Wednesday, March 15, 2017, 17:00–17:30, GW2 B3009

NO2 from space: What can we learn? — •Steffen Beirle — Max-Planck-Institut für Chemie, Mainz

Since two decades, satellite measurements of UV/Vis spectra allow for the global retrieval of tropospheric NO2. This dataset has tremendously increased our understanding on the spatial (maps) and temporal patterns (trends, seasonal or weekly cycles) of NOx sources. Nowadays, a main application is the quantification of NOx emissions from NO2 observations via inversion or assimilation techniques, involving CTMs. These approaches implicitly assume that the model describes processes such as transport and tropospheric chemistry accurately enough in order to relate differences in modeled and observed NO2 columns to the a-priori emissions.

Here we investigate how far the satellite measurements of tropospheric NO2 can be used to derive information beyond NOx emissions, i.e. chemistry (NOx lifetime) and transport, by analyzing and comparing the spatio-temporal patterns above and downwind from strong emission sources.

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