Jonathan is an atmospheric chemist. He received his BSc in Chemistry and French and his Ph.D. in Environmental Science from the University of East Anglia, England. Between 1995-1997 he worked as a postdoctoral researcher at the NOAA Aeronomy laboratory in Boulder, USA, and from 1998 to present at the Max Planck Institute for Chemistry as a research group leader. He has participated in many international field campaigns on aircraft, ships and at ground stations. His present research focus is the investigation of the chemistry of volatile organic compounds (VOC) in the atmosphere. He authored the award winning textbook “The Atmospheric Chemist´s Companion.” Recently he has applied gas measurement techniques to investigate how crowds of people respond during films and football matches.