Posts

Cities at the Forefront of Air Quality: Interview with Karim Tarraf, CEO of Hawa Dawa

In the days of Covid-19, “air quality” is a topic in the media, too. Cities are often pioneers in pushing for improvements. Decisions must be made in complex social contexts and measures must be integrated into larger plans. Here’s an interview with Karim Tarraf, CEO of Hawa Dawa, in which he comments on the following topics:
  • How can the increasing importance of air quality data be explained?
  • Why are the available measurements and data usually insufficient?
  • What does cooperation with cities look like?

(The complete interview is available in German only)

Read more

NO2 concentrations during the lockdown in Munich

I have recently heard people uttering disappointment regarding the rather small effect they have observed at official measurement stations in Munich during the time of the lockdown due to the coronavirus. Looking at the raw hourly measurement traces at different locations in and around Munich, we can see a very clear drop during the initial phase of the lockdown, with concentrations coming up again after that. So we decided to take a deeper look. We considered impacts from weather conditions, season-specific influences as well as mobility behaviour. Read more