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A. James Friedson

Photo of A. James Friedson

Address:

4800 Oak Grove Drive
M/S 183-501

Pasadena, CA 91109

Phone:

818.354.2397

Fax:

818.393.4619

Member of:

Planetary And Exoplanetary Atmospheres

Education

  • B.S. with honors in Physics, California Institute of Technology, Pasadena, California (1979)
  • M.S. in Physics, University of California, Los Angeles (1980)
  • Ph.D. in Planetary Science and Physics, California Institute of Technology (1986)

Professional Experience

  • Mars Sample Return Back Planetary Protection (2013-present)
  • Phoenix Lander EDL Design Team (2008)
  • PI, NASA SSW, 2017-2020, “Saturn Ring Seismology”
  • PI, NASA SSW, 2015-2018, “Mars’ Ancient Climate”
  • PI, NASA SSW, 2015-2016, “Thermal Evolution of the Ice Giants”

Research Interests

  • Planetary Atmospheric Dynamics
  • Aerosol Microphysics
  • Extrasolar Planet Chemistry and Dynamics
  • Mars Sample Return Back Planetary Protection

Selected Publications

  1. Friedson AJ. 2020. Ice giant seismology: prospecting for normal modes. Phil. Trans. R. Soc. A 378: 20190475.
  2. Friedson, A.J. and Gonzales, E.J. 2017.  Inhibition of ordinary and diffusive convection in the water condensation zone of the ice giants and implications for their thermal evolution. Icarus 297, 160-178.
  3. Kleinböhl, A., Friedson, A.J., and Schofield, J.T. 2017. Two dimensional radiative transfer for the retrieval of limb emission measurements in the Martian atmosphere. JQSRT 187, 511-522.
  4. Friedson, A.J. and J.I. Moses 2012. General circulation and transport in Saturn's upper troposphere and stratosphere. Icarus 218, 861-875.
  5. Moses, J.I., Visscher, C., Fortney, J.J., Showman, A.P., Lewis, N.K., Griffith, C.A., Klippenstein, S.J., Shabram, M., Friedson, A.J., Marley, M.S., Freedman, R.S. (2011). Disequilibrium carbon, oxygen, and nitrogen chemistry in the atmospheres of HD 189733b and HD 209458b. Astrophys. J., 737, 15.
  6. Friedson, A.J., R.A. West, E.H. Wilson, F. Oyafuso, and G.S. Orton 2009. A global climate model of Titan's atmosphere and surface. Planet. Sp. Sci., 57, 1931-1949.
  7. Friedson, A.J. and D.J. Stevenson (1983). Viscosity of rock-ice mixtures and applications to the evolution of icy satellites. Icarus 56, 1-14.
  8. Friedson, A.J. and Y.L. Yung (1984). The thermosphere of Titan. J. Geophys. Res. 89, 85-90.
  9. Friedson, J. and A.P. Ingersoll (1987). The seasonal meridional energy balance and thermal structure of the atmosphere of Uranus; A radiative-convective-dynamical model. Icarus 69, 135-156.
  10. Orton, G. S., A. J. Friedson, et al. (1991). Thermal maps of Jupiter: Spatial organization and time dependence of stratospheric temperatures, 1980-1991. Science, 252, 537-542.
  11. Leovy, C. B., A. J. Friedson, and G. S. Orton (1991). The quasi-quadrennial oscillation of Jupiter's equatorial stratosphere. Nature 354, 380-382.
  12. West, R. A., A. J. Friedson, and J. F. Appleby (1992). Jovian large-scale stratospheric circulation, Icarus, 100, 245-259.
  13. Friedson, A.J. (1994). Gravity waves in Titan's atmosphere. Icarus 109, 40-57.
  14. Orton, G. S., A. J. Friedson, et al. (1994). Thermal maps of Jupiter: Spatial organization and time dependence of tropospheric temperatures, 1980-1993. Science 265, 625-631.
  15. Friedson, A.J., W.F. Hoffmann, J.D. Goguen, L.K. Deutsch, G.S. Orton, J.L. Hora, A. Dayal, J.N. Spitale, W.K. Wells, and G.G. Fazio (1995). Thermal infrared light curves of the impact of Comet Shoemaker-Levy 9 Fragment R. Geophys. Res. Lett. 22, 1569-1572.
  16. West, R.A., E. Karkoschka, A.J. Friedson, M. Seymour, K.H. Baines, and H.B. Hammel (1995). Impact debris particles in Jupiter's stratosphere, Science 267, 1296-1301.
  17. Friedson, A.J. (1998). Formation of refractory grains in Shoemaker-Levy 9 fireballs. Icarus 131, 179-197.
  18. Ortiz, J.L., G.S. Orton, A.J. Friedson, S.T. Stewart, and J. Spencer 1998. Evolution and persistence of 5-JLm hot spots at the Galileo Probe entry latitude. J. Geophys. Res. 103, 23051-23069.
  19. Friedson, A.J. (1999). New observations and modelling of a QBO-like oscillation in Jupiter's stratosphere. Icarus 137, 34-55.
  20. Friedson, A.J., R.A. West, A. Hronek, N. Larsen, and N. Dalal (1999). Transport and mixing in Jupiter's stratosphere inferred from Comet S-L9 dust migration. Icarus 138, 141-156.
  21. Friedson, A.J., A-S. Wong, and Y.L. Yung 2002. Models for polar haze formation in Jupiter's stratosphere. Icarus 158, 389-400.
  22. Moses, J.I., T. Fouchet, R.V. Yelle, A.J. Friedson, G.S. Orton, B. Bezard, P. Drossart, G.R. Gladstone, T. Kostiuk, and T.A. Livengood 2003. The stratosphere of Jupiter. In Jupiter - The Planet, Satellites, and Magnetosphere, (F. Bagenal, W. McKinnon, and T. Dowling, Eds.) Cambridge University Press, p.129-158.
  23. West, R.A., K. Baines, D. Banfield, A.J. Friedson, B. Ragent, and F. Taylor 2003. Jovian Clouds and Haze. In Jupiter - The Planet, Satellites, and Magnetosphere, (F. Bagenal, W. McKinnon, and T. Dowling, Eds.) Cambridge University Press, p. 79-104.
  24. Wong, A-S., Y.L. Yung, and A.J. Friedson 2003. Benzene and haze formation in the polar atmosphere of Jupiter. Geophys Res. Lett. 30, 1-4.
  25. Friedson, A.J. 2005. Water, ammonia, and H2S mixing ratios in Jupiter's five-micron hot spots: A dynamical model. Icarus 177, 1-17.