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Ralph Kahn

  • Senior Research Scientist
  • NASA Goddard Space Flight Center
  • 50h-indexImpact measure calculated using publication and citation counts. Updated daily.
  • 9269CitationsNumber of citations received by Ralph's publications. Updated daily.

Other IDs

Research interests

Climate ChangeAerosol Impacts on Climate & Air QualitySatellite Remote Sensing


Ralph Kahn, a Senior Research Scientist at NASA’s Goddard Space Flight Center, received his PhD in applied physics from Harvard University. He spent 20 years as a Research Scientist and Senior Research Scientist at the Jet Propulsion Laboratory, where he studied climate change on Earth and Mars, and also led the Earth & Planetary Atmospheres Research Element. Kahn is Aerosol Scientist for the NASA Earth Observing System's Multi-angle Imaging SpectroRadiometer (MISR) instrument. He focuses on using MISR’s unique observations, combined with other data and numerical models, to learn about wildfire smoke, desert dust, volcano and air pollution particles, and to apply the results to regional and global climate-change questions. Kahn has lectured on Global Climate Change and atmospheric physics at UCLA and Caltech, and is editor and founder of PUMAS, the on-line journal of science and math examples for pre-college education (

Co-authors (583)

  • Prashant Dave
  • Myungje Choi
  • Suleiman Baraka
  • Xiaoyuan Li

Publications (5)

  • Variation in global chemical composition of PM<inf>2.5</inf>: emerging results from SPARTAN

    • Snider G
    • Weagle C
    • Murdymootoo K
    • et al.
    Get full text
  • SPARTAN: A global network to evaluate and enhance satellite-based estimates of ground-level particulate matter for global health applications

    • Snider G
    • Weagle C
    • Martin R
    • et al.
    Get full text
  • Maritime aerosol network as a component of AERONET - First results and comparison with global aerosol models and satellite retrievals

    • Smirnov A
    • Holben B
    • Giles D
    • et al.
    Get full text
  • Environmental snapshots from ACE-Asia

    • Kahn R
    • Anderson J
    • Anderson T
    • et al.
    Get full text
  • PARAGON: An integrated approach for characterizing aerosol climate impacts and environmental interactions

    • Diner D
    • Ackerman T
    • Anderson T
    • et al.
    Get full text

Professional experience

Senior Research Scientist

NASA/Goddard Space Flight Center

September 2007 - Present

Research Scientist & Senior Research Scientist

NASA Jet Propulsion Laboratory

September 1986 - August 2007(21 years)

Research Scientist

Washington University in Saint Louis

September 1984 - August 1986(2 years)

Post-doctoral Fellow

Cornell University Department of Astronomy

June 1980 - August 1984(4 years)


PhD -- Applied Physics

Harvard University

September 1975 - February 1980(4 years)

MS -- Applied Physics

Harvard University

September 1973 - August 1975(2 years)

BS -- Physics & Geology

University of Rochester

September 1969 - August 1973(4 years)

HS Academic Diploma

The Bronx High School of Science

September 1966 - June 1969(3 years)