Ray Nassar

Image Ray Nassar
Research Scientist - Greenhouse Gas Measurements and Modelling

Current research and/or projects

  • Quantification of CO2 and CH4 sources and sinks using satellite-based and surface-based atmospheric CO2/CH4 observations and models
  • Retrieval and application of CO2 and CH4 concentrations from satellite observations
  • Studies to determine the benefit of planned or hypothetical observing systems, such as future satellite missions

Professional activities / interests

  • Principal Investigator (PI) for the Arctic Observing Mission (AOM)
  • Science team member for the Atmospheric Chemistry Experiment (ACE, since 2000), Orbiting Carbon Observatory (OCO/OCO-2/OCO-3, since 2007), Greenhouse Gases Observing Satellite (GOSAT/GOSAT-2, since 2009)
  • Reviewer for the Intergovernmental Panel on Climate Change (IPCC) Assessment Reports
  • Member of the Atmospheric Science Advisory Committee (ASAC) for the Canadian Space Agency (CSA) since 2017

Education and awards

  • University of Toronto, Department of Physics, NSERC Postdoctoral Fellow, 2008-2010
  • Harvard University, Atmospheric Chemistry Modelling Group, Postdoctoral Fellow, 2006-2008
  • Ph.D. University of Waterloo, 2006
  • B.Ed. Queen's University, 1998
  • B.Sc. University of Waterloo, 1998

Key publications

  • Deng, F., D.B.A. Jones, D.K. Henze, N. Bousserez, K.W. Bowman, J.B. Fisher, R. Nassar, C. O'Dell, D. Wunch, P.O. Wennberg, E.A. Kort, S.C. Wofsy, T. Blumenstock, N.M. Deutscher, D. Griffith, F. Hase, P. Heikkinen, V. Sherlock, K. Strong, R. Sussmann, T. Warneke. 2014. Inferring regional sources and sinks of atmospheric CO2 from GOSAT XCO2 data. Atmospheric Chemistry and Physics, 14, 3703-3727.