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 Atmospheric Physics And Weather (329E): People
Fredrick (Bill) Irion's Picture
Jet Propulsion Laboratory
M/S 183-601
4800 Oak Grove Drive
Pasadena, CA 91109
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Fredrick (Bill) Irion

  • B.A.Sc, Chemical Engineering, University of Ottawa (1988)
  • M.S., Chemical Engineering , California Institute of Technology (1992)
  • Ph.D., Chemical Engineering with minor in Planetary Science, California Institute of Technology (1996)

Research Interests
  • Analyses and validation of Atmospheric Infrared Sounder (AIRS) ozone, temperature and water vapor retrievals.
  • Development of retrieval algorithms for AIRS temperature, water vapor, ozone and cloud products.


The Atmospheric Infrared Sounder, AIRS, is an instrument whose goal is to support climate research and improved weather forecasting.

Professional Experience
  • Jet Propulsion Laboratory (1996-Present)
    • AIRS Atmospheric Science Research Group (1999 - present)
    • Caltech Post-Doctoral Scholar (1996-1999)
  • California Institute of Technology
    • Staff Researcher, Dept. of Geology and Geophysics (Jan.-Jun. 1996)
    • Graduate Research Assistant (1989-1995)

Selected Publications
  1. Irion, F. W., B. H. Kahn, M. M. Schreier, E. J. Fetzer, E. Fishbein, E. Fu, P. Kalmus, R. C. Wilson, S. Wong, and Q. Yue, Single-footprint retrievals of temperature, water vapor and cloud properties from AIRS, Atmos. Meas. Tech., 11, 971-995, 2018.
  2. J. Dorrestijn, B. H. Kahn, J. Teixeira, and F. W. Irion, Instantaneous variance scaling of AIRS thermodynamic profiles using a circular area Monte Carlo approach, Atmos. Meas. Tech., 11, 2717-2733, 2018.
  3. R. Zander, M. R. Gunson, C. B. Farmer, C. P. Rinsland, F. W. Irion and E. Mahieu, The 1985 chlorine and fluorine inventories in the stratosphere based on ATMOS observations at 30N latitude, J. Atmos. Chem., 15: 171-186, 1992.
  4. F. W. Irion, M. Brown, G. C. Toon and M. R. Gunson, Increase in atmospheric CHF2Cl over southern California from 1985 to 1990, Geophys. Res. Lett., 21 , 1723-1726, 1994.
  5. F. W. Irion, M. R. Gunson, C. P. Rinsland, Y. L. Yung, M. C. Abrams, A. Y. Chang, and A. Goldman, Heavy ozone enrichments from ATMOS infrared solar spectra, Geophys. Res. Lett., 17, 2377-2380, 1996.
  6. F. W. Irion, E. J. Moyer, M. R. Gunson, C. P. Rinsland, H. A. Michelson, R. J. Salawitch, Y. L. Yung, A. Y. Chang, M. J. Newchurch, M. M. Abbas, M. C. Abrams, and R. Zander, Stratospheric observations of CH3D and HDO from ATMOS infrared solar spectra: Enrichments of deuterium in methane and implications for HD, Geophys. Res. Lett., 17, 2381-2384, 1996.
  7. E. J. Moyer, F. W. Irion, Y. L. Yung, and M. R. Gunson, ATMOS stratospheric deuterated water and implications for troposphere-stratosphere transport, Geophys. Res. Lett., 17, 2385-2388, 1996.
  8. R. Zander, E. Mahieu, M. R. Gunson, M. C. Abrams, A. Y. Chang, M. Abbas, C. Aellig, A. Engel, A. Goldman, F. W. Irion, N. Kampfer, H. A. Michelson, M. Newchurch, C. P. Rinsland, R. J. Salawitch, G. P. Stiller, and G. C. Toon, The 1994 northern midlatitude budget of stratospheric chlorine derived from ATMOS/ATLAS-3 observations, Geophys. Res. Lett., 17, 2357-2360, 1996.
  9. L. R. Brown, M. R. Gunson, R. A. Toth, F. W. Irion, C. P. Rinsland, and A. Goldman, The 1995 Atmospheric Trace Molecule Spectroscopy (ATMOS) linelist, Appl. Opt., 35, 2828-2848, 1996.
  10. Y. L. Yung, A. Y. T. Lee, F. W. Irion, W. B. DeMore, and J. Wen, Carbon dioxide in the atmosphere: Isotopic exchange with ozone and its use as a tracer in the middle atmosphere, J. Geophys. Res., 102, 10857-10866, 1997.
  11. H. A. Michelsen, F. W. Irion, G. L. Manney, G. C. Toon, and M. R. Gunson, Features and trends in Atmospheric Trace Molecule Spectroscopy (ATMOS) version 3 stratospheric water vapor and methane measurements, J. Geophys. Res., 105, 22713-22724, 2000.
  12. G. L. Manney, H. A. Michelsen, R. M. Bevilacqua, M. R. Gunson, F. W. Irion, N. J. Livesey, J. Oberheide, M. Riese, J. M. Russell III, G. C. Toon, and J. M. Zawodny, Comparison of satellite ozone observations in coincident air masses in early November 1994, J. Geophys. Res., 106, 9923-9943, 2001.
  13. A. Eldering, F. W. Irion, A. Y. Chang, M. R. Gunson, F. P. Mills , H. M. Steele, Vertical profiles of aerosol volume from high-spectral-resolution infrared transmission measurements. I. Methodology, Appl. Opt., 40,  3082-3091, 2001.
  14. F. W. Irion, M. R. Gunson, G. C. Toon, A. Eldering, A. Y. Chang, E. Mahieu, G. L. Manney, H. A. Michelsen, E. J. Moyer, M. J. Newchurch, G. B. Osterman, M. J. Prather, C. P. Rinsland, R. J. Salawitch, B. Sen, Y. L. Yung and R. Zander, The Atmospheric Trace Molecule Spectroscopy Experiment (ATMOS) version 3 data retrievals, Appl. Opt., 41, 6968-6979, 2002.
  15. B. H. Kahn, A. Eldering, F. W. Irion, F. P. Mills, B. Sen, M. R. Gunson, Cloud identification in ATMOS infrared occultation measurements, Appl. Opt., 41, 2768-2780, 2002.
  16. M. C. Liang, F. W. Irion, J.D. Weibel, C. E. Miller, G. A. Blake, Y. L. Yung, Isotopic composition of stratospheric ozone. J. Geophys. Res., 111, D02302, doi:10.1029/2005JD06342, 2006.
  17. M. T. Chahine, T. S. Pagano, H. H Aumann, R. Atlas, C. Barnet, J. Blaisdell, L. Chen, M. Divakarla, E. J. Fetzer, M. Goldberg, C. Gautier, S. Granger, S. Hannon,F. W. Irion, R. Kakar, E. Kalnay, B. H. Lambrigtsen, S.-Y. Lee, J. Le Marshall, W. W. McMillan, L. McMillin, E. T. Olsen, H. Revercomb, P. Rosenkranz, W. L. Smith, D. Staelin, L . L. Strow, J. Susskind, D. Tobin, W. Wolf, L. H. Zhou, AIRS: Improving weather forecasting and providing new data on greenhouse gases. Bull. Amer Meteor. Soc., 87, 911-926, 2006.
  18. S. S. Kulawik, D. B. A. Jones, R. Nassar, F. W. Irion, J. R. Worden JR, K .W. Bowman, T. Machida, H. Matsueda, Y. Sawa, S. C. Biraud, M. L. Fischer, A. R. Jacobson, Characterization of Tropospheric Emission Spectrometer (TES) CO2 for carbon cycle science, Atmos. Chem. Phys., 10, 5601-5623, 2010.
  19. B. H. Kahn, F. W. Irion, V. T. Dang, E. M. Manning, S. L. Nasiri, C. M. Naud, J. M Blaisdell, M. M. Schreier, Q. Yue, K. W. Bowman, E. J. Fetzer, G. C. Hulley, K. N. Liou, D. Lubin, S. C. Ou, J. Susskind, Y. Takano, B. Tian, J. R Worden, The Atmospheric Infrared Sounder version 6 cloud products, Atmos. Chem. Phys., 14, 399-426, 2014.

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