Bremen 2017 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 9: Atmosphäre - Spurengase

UP 9.2: Hauptvortrag

Mittwoch, 15. März 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 NO_x sources. Nowadays, a main application is the quantification of NO_x 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 NO_x emissions, i.e. chemistry (NO_x lifetime) and transport, by analyzing and comparing the spatio-temporal patterns above and downwind from strong emission sources.