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James Margitan's Picture
Address:
Jet Propulsion Laboratory
M/S 183-501
4800 Oak Grove Drive
Pasadena, CA 91109
Phone:
818.354.2170
Fax:
818.354.0966
Email:

James Margitan
Deputy Division Manager

Jim Margitan is the Deputy Manager of the Science Division, and is also the manager of the Earth Science Research and Analysis Program and the Atmospheric Chemistry Program in the Earth Science and Technology Directorate.

Jim's research focuses on in situ measurements of ozone aboard high altitude research balloons. These measurements, carried out from the tropics to polar regions, are used in studying the chemical and dynamical processes that affect stratospheric ozone and also for validation of satellite instruments. Jim also coordinates the ballooning activities for NASA's Upper Atmosphere Research Program, in which a number of JPL and outside instruments fly aboard JPL's balloon gondolas for these studies.

Selected Awards
  • NASA Group Achievement Awards
    • Airborne Antarctic Ozone Experiment (1989)
    • Airborne Arctic Stratospheric Expedition (1989)
    • UARS Infrared Balloon Experiment (IBEX/FIREX) (1993)
    • Stratospheric Photochemistry Aerosols and Dynamics Expedition (SPADE) (1994)
    • Advanced Subsonic Technology Planning Team (1994)
    • ASHOE/MAESA (1995)
    • POLARIS Project (1998)
    • Atmospheric Effects of Aviation Laboratory Studies (1999)
    • SOLVE Science (2001)
    • Balloon Observations of the Stratosphere (2004)
    • UARS Team (2006)
    • FIRST Team (2006)
  • NOAA ERL Outstanding Scientific Paper Award (co-author) (1995)
  • NOAA ERL Outstanding Scientific Paper Award (co-author) (1998)
Selected Publications
  1. L. Froidevaux et al., "Validation of Aura Microwave Limb Sounder stratospheric ozone measurements", J. Geophys. Res., 113, D15, 10.1029/2008JD15S20, 2008
  2. L. J. Kovalenko, K. W. Jucks, R. J. Salawitch, G. C. Toon, J.-F. Blavier, D. G. Johnson, A. Kleinbohl, N. J. Livesey, J. J. Margitan, H. M. Pickett, M. L. Santee, B. Sen, R. A. Stachnik, and J. W. Waters,"Observed and modeled HOCl profiles in the midlatitude stratosphere: Implication for ozone loss," Geophys. Res. Lett., 34, L19801, doi:10.1029/2007GL031100, 2007.
  3. L. Froidevaux et al., "Early Validation Analyses of Atmospheric Profiles from EOS MLS on the Aura Satellite", IEEE Trans. Geoscience and Remote Sensing 44, 1106-1121, 2006.
  4. M. H. Proffitt, K. Aikin, A. F. Tuck, J. J. Margitan, C. R. Webster, G. C. Toon, J. W. Elkins, "Seasonally Averaged Ozone and Nitrous Oxide in the Northern Hemisphere Lower Stratosphere," J. Geophys. Res., 108, D3, 10.1029/2002JD002657 (2003)
  5. Kawa S.R., R. Bevilacqua, J. J. Margitan, A. R. Douglass, M. R. Schoeberl, K. Hoppel, B. Sen, "Interaction between dynamics and chemistry of ozone in the setup phase of the Northern Hemisphere polar vortex," J. Geophys. Res., 107, 8310, 10.1029/2001JD001527 (2002)
  6. Müller, R, S. Tilmes, J. Grooss, D. S McKenna, M. Muller, U. Schmidt, G. C. Toon, R. A. Stachnik, J. J. Margitan, J. W. Elkins, J. Arvelius, J. M. Russell III, "Chlorine activation and chemical ozone loss deduced from HALOE and balloon measurements in the Arctic during the winter of 1999-2000," J. Geophys. Res., 108(D5), 8302, 10.1029/2001JD001423 (2002)
  7. R. J. Salawitch, J. J. Margitan, B. Sen, G. C. Toon, G. B. Osterman, M. Rex, J. W. Elkins, E. A. Ray, F. L. Moore, D. F. Hurst, P. A. Romashkin, R. M. Bevilacqua, K. Hoppel, E. C. Richard, and T. P. Bui, "Chemical Loss of Ozone During The Arctic Winter of 1999-2000: An Analysis Based on Balloon-borne Observations," J. Geophys. Res., 107(D20), 8269, 10.1029/2001JD000620 (2002)
  8. J. D. Lumpe, M. Fromm, K. Hoppel, R. M. Bevilacqua, C. E. Randall, E. V. Browell, W. B. Grant, T. McGee, J. Burris, L. Twigg, E. C. Richard, G. C. Toon, B. Sen, J. J. Margitan, H. Boesch, R. Fitzenberger, and K. Pfeilsticker., "Comparison of POAM III ozone measurements with correlative aircraft and balloon data during SOLVE," J. Geophys. Res., 108(D5), 8316, 10.1029/2001JD000472 (2002)
  9. M. Rex, et al, "Chemical depletion of Arctic ozone in winter 1999/2000," J. Geophys. Res., 107(D20), 8276, 10.1029/2001JD000533 (2002)
  10. T. Sugita, T. Yokota, H. Nakajima, H. Kanzawa, H. Nakane, H. Gernandt, V. Yushkov, K. Shibasaki, T. Deshler, Y. Kondo, S. Godin, F. Goutail, J.-P. Pommereau, C. Camy-Peyret, S. Payan, P. Jeseck, J.-B. Renard, H. Bösch, R. Fitzenberger, K. Pfeilsticker, M. von König, H. Bremer, H. Küllmann, H. Schlager, J.J. Margitan, R. A. Stachnik, G.C. Toon, K. Jucks, W.A. Traub, D.G. Johnson, I. Murata, H. Fukunishi, and Y. Sasano, "Validation of ozone measurements from the Improved Limb Atmospheric Spectrometer (ILAS)," J. Geophys. Res., 107 (D24), 8212, 10.1029/2001JD000602 (2002)
  11. K. W. Jucks, D. G. Johnson, K. V. Chance, W. A. Traub, J. J. Margitan, R. A. Stachnik, Y. Sasano, T. Yokota, M. Suzuki, H. Kanzawa, K. Shibasaki, T. Ogawa, "Validation of ILAS v5.2 data with FIRS-2 balloon observations," J. Geophys. Res., 107, D24, ILS 4, 10.1029/2001JD000578 (2002)
  12. E. J. Lanzendorf, T. F. Hanisco, P. O. Wennberg, R. C. Cohen, R. M. Stimpfle, J. G. Anderson, R. S. Gao, J. J. Margitan, and T. P. Bui, "Establishing the Dependence of [HO2]/[OH] on Temperature, Halogen Loading, O3, and NOx Based on in Situ Measurements from the NASA ER-2," J. Phys. Chem. 105, 1535-1542 (2001)
  13. T. F. Hanisco, E. J. Lanzendorf, P. O. Wennberg, K. K. Perkins, R. M. Stimpfle, P. B. Voss, J. G. Anderson, R. C. Cohen, D. W. Fahey, R. S. Gao, E. J. Hintsa, R. J. Salawitch, J. J. Margitan, C. T. McElroy, and C. Midwinter, "Sources, Sinks, and the Distribution of OH in the Lower Stratosphere," J. Phys. Chem. 105, 1543-1553 (2001)
  14. D. W. Fahey, R. S. Gao, L. A. Del Negro, E. R. Keim, S. R. Kawa, R. J. Salawitch, P. O. Wennberg, T. F. Hanisco, E. J. Lanzendorf, K. K. Perkins, S. A. Lloyd, W. H. Swartz, M. H. Proffitt, J. J. Margitan, J. C. Wilson, R. M. Stimpfle, R. C. Cohen, C. T. McElroy, C. R. Webster, M. Loewenstein, J. W. Elkins, and T. P. Bui, "Ozone destruction and production rates between spring and autumn in the Arctic stratosphere," Geophys. Res. Lett. 27, 2605-2608 (2000)
  15. C. R. Webster, H. A. Michelsen, M. R. Gunson, J. J. Margitan, J. M. Russell III, G. C. Toon, and W. A. Traub, "Response of lower stratospheric HCl/Cly to volcanic aerosol: Observations from aircraft, balloon, space shuttle and satellite instruments," J. Geophys. Res., 105, 11711-11720 (2000)
  16. H. A. Michelsen, C. R. Webster, G. L. Manney, D. C. Scott, J. J. Margitan, R. D. May, F. W. Irion, M. R. Gunson, J. M. Russell III, and C. M. Spivakovsky, "Maintenance of high HCl/Cly and NOx/NOy in the Antarctic vortex: A chemical signature of confinement during spring," J. Geophys. Res. 104, 26419-26436 (1999)
  17. T. Woyke, R. Muller, F. Stroh, D. S. McKenna, A. Engel, J. J. Margitan, M. Rex, and K. Carslaw, "A test of our understanding of ozone chemistry in the in the Arctic Polar Vortex using in situ measurements of ClO, BrO, and O3 in the 1994/95 winter," J. Geophys. Res, 104, 18755-18768 (1999)
  18. G. C. Toon, J. F. Blavier, B. Sen, J. J. Margitan, C. R. Webster, R. D. May, D. 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 measurements of atmospheric trace gases," J. Geophys. Res 104, 26779-26790 (1999)
  19. B. Sen, G. B. Osterman, R. J. Salawitch, G. C. Toon, J. J. Margitan, J. F. Blavier, A. Y. Chang, R. D. May, C. R. Webster, R. M. Stimpfle, G. P. Bonne, P. B. Voss, K. K. Perkins, J. G. Anderson, R. C. Cohen, J. W. Elkins, G. S. Dutton, D. F. Hurst, P. A. Romashkin, E. L. Atlas, S. M. Schauffler, and M. Loewenstein, "The budget and partitioning of stratospheric chlorine during the 1997 Arctic summer," J. Geophys. Res., 104, 26653-26666 (1999)
  20. M. Rex, R. J. Salawitch, G. C. Toon, B. Sen, J. J. Margitan, G. B. Osterman, J.-F. Blavier, R. S. Gao, S. Donnelly, E. Keim, J. Neuman, D. W. Fahey, C. R. Webster, D. C. Scott, R. L. Herman, R. D. May, E. J. Moyer, M. R. Gunson, F. W. Irion, A. Y. Chang, C. P. Rinsland, and T. P. Bui, "Subsidence, mixing and denitrification of Arctic polar vortex air measured during POLARIS," J. Geophys. Res., 104, 26611-26624 (1999)
  21. J. M. Pierson, K. A. McKinney, D. W. Toohey, J. Margitan, U. Schmidt, A. Engel, and P. A. Newman, "An investigation of ClO photochemistry in the chemically perturbed Arctic vortex," J. Atmos. Chem., 32, 61-81 (1999)
  22. G. B. Osterman, B. Sen, G. C. Toon, R. J. Salawitch, J. J. Margitan, J.F. Blavier, D. W. Fahey, and R. S. Gao, "Partitioning of NOy species in the summer Arctic stratosphere," Geophys. Res. Lett., 26, 1157-1160 (1999)
  23. E. R. Keim S. A. McKeen, R. S. Gao, S. G. Donnelly, R. C. Wamsley, L. A. Del Negro, D. W. Fahey, T. F. Hanisco, E. J. Lanzendorf, M. H. Proffitt, J. J. Margitan, E. J. Hintsa, L. Jaegle, C. R. Webster, R. D. May, D. C. Scott, R. J. Salawitch, J. C. Wilson, C. T. McElroy, E. L. Atlas, F. Flocke, and T. P. Bui, "NOy partitioning from measurements of nitrogen and hydrogen radicals in the upper troposphere," Geophys. Res. Lett., 26, 51-54 (1999)
  24. R. S. Gao, D. W. Fahey, L. A. Del Negro, S. G. Donnelly, E. R. Keim, J. A. Neuman, E. Teverovskaia, P. O. Wennberg, T. F. Hanisco, E. J. Lanzendorf, M. H. Proffitt, J. J. Margitan, J. C. Wilson, J. W. Elkins, R. M. Stimpfle, R. C. Cohen, C. T. McElroy, T. P. Bui, R. J. Salawitch, S. S. Brown, A. R. Ravishankara, R. W. Portmann, M. K. W. Ko, D. K. Weisenstein, and P. A. Newman, "A comparison of observations and model simulations of NOx/NOy in the lower stratosphere," Geophys. Res. Lett., 26, 1153-1156 (1999)
  25. R. L. Herman, C. R. Webster, R. D. May, D. C. Scott, H. Hu, E. J. Moyer, P. O. Wennberg, T. F. Hanisco, E. J. Lanzendorf, R. J. Salawitch, Y. L. Yung, J. J. Margitan, and T. P. Bui, "Measurements of CO in the Upper Troposphere and Lower Stratosphere," Chemosphere Global Change Science 1, 173-183 (1999)
  26. L. A. Del Negro, D. W. Fahey, R. S. Gao, S. G. Donnelly, E. R. Keim, J. A. Neuman, R. C. Cohen, K. K. Perkins, L. C. Koch, R. J. Salawitch, S. A. Lloyd, M. H. Proffitt, J. J. Margitan, R. M. Stimpfle, G. P. Bonne, P. B. Voss, P. O. Wennberg, C. T. McElroy, W. H. Swartz, T. L. Kusterer, D. E. Anderson, L. R. Lait, and T. P. Bui, "Comparison of modeled and observed values of NO2 and J(NO2) during the POLARIS mission," J. Geophys. Res, 104, 26687-26704 (1999)

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