Mark Dowell is Senior Scientific Officer and Project Leader for Scientific and Technical Support to the Copernicus Programme at the European Commission’s Joint Research Centre. He also leads the European Commission Knowledge Centre on Earth Observation coordinating efforts to ensure scientifically sound and traceable uptake of Copernicus products and Services in European Policy. Mark has a Ph.D. in Oceanography and Earth Science from the University of Southampton (UK) in 1998. Following his thesis, he worked as Research Faculty in the Institute for Earth Oceans and Space at the University of New Hampshire (USA). Mark returned to work at the JRC as an Official in 2004 and he became Project Leader 2007. He has been engaged for many years with issues at the international level on Earth Observation, firstly as co-lead of a Virtual Constellation in CEOS then as the first Chair on the Working Group on Climate, in this context he also led the initiative established between CEOS, CGMS and WMO on the definition of a global Climate Monitoring Architecture, and currently leads CEOS activities on the CEOS Carbon Strategy and the Greenhouse Gas monitoring Task Team. Mark was recently appointed as co-chair of the GEO Climate Working Group.