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Geoffrey Toon

Photo of Geoffrey Toon


4800 Oak Grove Drive
M/S 183-601

Pasadena, CA 91109





Member of:

Laboratory Studies And Atmospheric Observations


  • B.A. Honours (Physics) University of Oxford (1978)
  • Ph.D. (Atmospheric Physics) University of Oxford (1984)

Professional Experience

  • Caltech, Visiting Associate in Planetary Science (2001-Present)
  • Jet Propulsion Laboratory (1984-Present)
    • Principal Investigator, JPL MkIV Interferometer (1988-Present)
    • Research Scientist (1986-Present)
    • NRC Resident Research Associate (1984-1986)

Selected Awards

  • 7 NASA Group Achievement Awards

Selected Publications

  1. Notholt, J., Z. Kuang, C. P. Rinsland, G. C. Toon, M. Rex, N. Jones, T. Albrecht, H. Deckelmann, J. Krieg, C. Weinzierl, H. Bingemer, R. Weller, O. Schrems, "Enhanced upper tropical tropospheric COS: Impact on the stratospheric aerosol layer," Science, 300, 307-310 (2003)
  2. Kuang, Z., G.C.Toon, P.O.Wennberg, Y.L.Yung, "Measured HDO/H2O ratios across the tropical tropopause," Geophys. Res. Lett., 30(7), 1372, DOI:10.1029/2003GL017023 (2003)
  3. Steele, H.M., A.M. Eldering, B. Sen, and G. C. Toon, "Retrieval of Stratospheric Aerosol Size and Composition Information from Solar Infrared Transmission Spectra," Appl. Opt., 42(12), 2140-2154 (2003)
  4. Irion, F.W., M.R. Gunson, G.C. Toon, A.Y. Chang, A. Eldering, E. Mahieu, G.L. Manney, H.A. Michelsen, E.J. Moyer, M.J. Newchurch, G.B. Osterman, C.P. Rinsland, R.J. Salawitch, B. Sen, Y.L. Yung, and R. Zander, "Atmospheric Trace Molecule Spectroscopy (ATMOS) Experiment Version 3 data retrievals," Appl. Opt., 41(33), 6968-6979 (2002)
  5. Kuang, Z., J.S. Margolis, G.C. Toon, D. Crisp, and Y.L. Yung, "Spaceborne measurements of atmospheric CO2 by high resolution NIR spectrometry of reflected sunlight: An introductary study," Geophys. Res. Lett., 29(15), doi:10.1029/2001GL014298 (2002)
  6. Yang, A., G.C. Toon, J.S. Margolis, P.O. Wennberg, "Atmospheric CO2 retrieved from ground-based near IR spectra," Geophys. Res. Lett., 29(9), doi:10.1029/2001GL014537 (2002)
  7. Toon, G.C., B. Sen, J.F. Blavier, Y. Sasano, T. Yokota, H. Kanzawa, T. Ogawa, M. Suzuki, and K. Shibasaki, "Comparison of ILAS and MkIV profiles of atmospheric trace gases measured above Alaska in May 1997," J. Geophys. Res., 107(D24), 8211, doi:10.1029/2001JD000640 (2002)
  8. Toon, G. C., J.-F. Blavier, B.Sen, and B.J. Drouin, "Atmospheric COCl2 measured by balloon borne solar absorption spectrometry," Geophys Res Lett., 28, 2835-2838 (2001)
  9. Griffith, D. W. T., G. C. Toon, B. Sen, J.-F. Blavier, and R. A. Toth, "Vertical profiles of nitrous oxide isotopomer fractionation measured in the stratosphere," Geophys. Res. Lett., 26, 2485-2488 (2000)
  10. Toon, G. C., J.-F. Blavier, B. Sen, R. J. Salawitch, G. B. Osterman, J. Notholt, M. Rex, C. T. McElroy, and J. M. Russell III, "Ground-based observations of Arctic ozone loss during spring and summer 1997," J. Geophys. Res., 104, 26,497-26,510 (1999)
  11. Toon, G. C., J.-F. Blavier, B. Sen, J. J. Margitan, C. R. Webster, R. D. May, D. W. Fahey, R. Gao, L. Del Negro, M. Proffitt, J. Elkins, P. A. Romashkin, D. F. Hurst, S. Oltmans, E. Atlas, S. Schauffler, F. Flocke, T. P. Bui, R. M. Stimpfle, G. P. Bonne, P. B. Voss, and R. C. Cohen, "Comparison of MkIV balloon and ER-2 aircraft profiles of atmospheric trace gases," J. Geophys. Res., 104, 26,779-26,790 (1999)
  12. Toon, G.C., J.-F.Blavier and J.T.Szeto, "Latitude variations of stratospheric trace gases," Geophys. Res. Lett., 21, 2599-2602 (1994)
  13. , O.B., E.V.Browell, B.L.Gary, L.Lait, P.Newman, R.Pueschel, P,Russell, M.Schoeberl, G.C.Toon, W.Traub, F.Valero, H.Selkirk, & J.Jordan, "Heterogeneous Reaction Probabilities, Solubilities, and Physical State of Cold Volcanic Aerosols," Science, 261, 1136-1140 (1993)
  14. Toon, G.C., J.-F.Blavier, J.N.Solario, and J.T.Szeto, "Airborne Observations of the Composition of the 1992 Tropical Stratosphere by FTIR Solar Absorption Spectrometry," Geophys.Res.Lett., 20, 2503-2506 (1993)
  15. Toon, G.C., C.B.Farmer, P.W.Schaper, L.L.Lowes, and R.H.Norton, "Composition Measurements of the 1989 Arctic Winter Stratosphere by Airborne Infrared Solar Absorption Spectroscopy," J.Geophys.Res., 97, 7939-7961 (1992)
  16. Toon, G.C., "The Jet Propulsion Laboratory MkIV Interferometer," Optics and Photonics News, 2, 19-21 (1991)
  17. Toon, G.C., and C.B.Farmer, "Detection of HOCl in the Antarctic Stratosphere," Geophys.Res.Lett., 16, 1375-1377 (1989)
  18. Toon, G.C., C.B.Farmer, L.L.Lowes, P.W.Schaper, J.-F.Blavier, and R.H.Norton, "Infrared Aircraft Measurements of Stratospheric Composition over Antarctica during September 1987," J.Geophys.Res., 94, 16571-16596 (1989)
  19. Toon, G.C., C.B.Farmer, P.W.Schaper, J.-F.Blavier, and L.L.Lowes, "Ground-based Infrared Measurements of Tropospheric Source Gases over Antarctica during the 1986 Austral Spring," J.Geophys.Res., 94, 11613-11624 (1989)
  20. Toon, G. C., "Detection of stratospheric nitrogen species," Nature, 330, 427 (1987)
  21. Farmer, C.B., G.C.Toon, P.W.Schaper, J.-F.Blavier, and L.L.Lowes, "Stratospheric Trace Gases in the Spring 1986 Antarctic Atmosphere," Nature, 329, 126-130 (1987)
  22. Toon, G. C., C. B. Farmer, and R. H. Norton, "Detection of stratospheric N2O5 by infrared remote sensing," Nature, 319, 570-571 (1986)
  23. Toon G. C., "Infrared Emission spectrometry for atmospheric measurements from balloons," D.Phil. Thesis, University of Oxford (1984)