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Source: Julich Research Center Jülich, 30. April 2020 – How the Shutdown in the Corona-crisis impact on the air quality in the Rhineland, examining the jülich atmosphere researchers, from the weekend by using a exceptional measurement campaign. A Zeppelin NT flies for several days on different routes through the Rhineland, on-Board instruments measure trace gases and fine dust. Prof. Astrid Kiendler-Scharr Director of the Institute for tropospheric research, and coordinates the measurement campaign. In this Interview, she explains the goals of the project.

In the past year, the Jülich troposphere researchers have already used passenger flights with the Zeppelin for measurements over the Rhineland. Why do you use the Zeppelin for such measurements? The Zeppelin flies at a height of a few hundred meters above the ground. This lowest layer of the atmosphere is of particular importance for questions of air quality in that a large part of the emissions takes place on the ground and is implemented in this lowest layer by air chemistry. However, direct in-situ observation data are rarely in this layer or limited to local measuring points, for example measuring towers. Thanks to its flight characteristics, the Zeppelin offers ideal conditions for analyzing undisturbed air samples. Using passenger flights for measurements, as we do in the IAGOS project, has the additional advantage that we can make a larger number of observations. Astrid Kiendler-Scharr Copyright: Forschungszentrum Jülich / Sascha Kreklau What are the goals of the new campaign? And where do you think there will be major changes? In the current campaign we want to investigate how the current shutdown affects the composition of the air. Traffic-related emissions in particular, but also some emissions from the industrial and energy sectors, have been reduced in recent weeks. The current situation therefore offers the possibility to test models under real conditions of how air pollutants could be reduced in concrete terms. Do the current changes have an impact on climate change? For the greenhouse gas CO2, a sustained reduction is necessary in order to be able to contribute to achieving the climate goals. For other climate pollutants such as short-lived greenhouse gases and aerosols, a positive effect on the climate will only arise if the reductions are long-term. The international dimension of the reduction and the already comparatively long duration in any case offer unique observation opportunities to close existing gaps in knowledge.The Zeppelin NT on the airfield in Bonn-Hangelar Copyright: Forschungszentrum Jülich / Ralf Uwe Limbach Current photo and video material can be found at : ”Corona and the air quality in the Rhineland” We provide timely information about flight routes and times via our Twitter channel. Contact: Prof. Astrid Kiendler-Scharr Institute for Energy and Climate Research, Troposphere Division (IEK-8) Tel .: 02461 61-4692E-Mail: a.kiendler-scharr@fz-juelich.dePress contact: Erhard Zeiss, Press Officer Tel .: 02461 61-1841E- Mail:

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