As part of our GREENVELOPES project, we had Aurélien Mirebeau from Météo France as a guest in our group over the past 14 days. Aurélien and Niklas carried out joint field measurements on the green façade in Berlin. Aurélien was also able to present the first results of his green roof modelling (Modelling urban vegetation in the TEB urban canopy model: research issues on green roofs and facades).