We welcome Jennifer Jefferson as a TR32 Fellow from Hydrologic Science and Engineering PhD Program, Colorado School of Mines. She will stay in Cologne/Jülich from 4th May to 18th June 2015 and mainly collaborate with the project D2 in the collection of fluorescence data that will be used as a direct estimate of plant photosynthetic rates and thus can be included in mesoscale models to better constrain vegetation exchange.