Bremen 2017 – scientific programme

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UP: Fachverband Umweltphysik

UP 13: Atmosphäre - Spurengase (Fortsetzung)

UP 13.2: Talk

Thursday, March 16, 2017, 14:15–14:30, GW2 B3009

Coupling of Stratospheric Water Vapour and Methane derived from SCIAMACHY Solar Occultation Measurements — •Stefan Noël, Katja Weigel, Klaus Bramstedt, Alexei Rozanov, Heinrich Bovensmann, and John P. Burrows — Institut für Umweltphysik, Universität Bremen

Water vapour and methane belong to the most important greenhouse gases and therefore have a significant impact on climate. In the stratosphere they also play an important role in chemistry, e.g. in ozone loss due to heterogeneous reactions on polar stratospheric clouds. Methane is actually one of the main sources for stratospheric water vapour. Therefore, information about sources or sinks of water vapour in the stratosphere can be obtained from the coupling between water vapour and methane.

Here, we will present recent results for stratopheric water vapour and methane and their combination determined from solar occultation measurements performed by the SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) onboard the ESA Envisat satellite between August 2002 and April 2012. It is expected that the combination of water vapour and methane data sets from simultaneous measurements by the same instrument using the same retrieval method is especially suited to derive information about the coupling of the two species.