BRUCE L. GARY

2001 February 18

I was born in Ann Arbor, MI in 1939.  After receiving a B. S. degree in Astronomy from the University of Michigan in 1961 I joined the U. S. Naval Research Laboratory's Radio Astronomy Branch and conducted studies of Jupiter.  In 1963 I joined Caltech's Jet Propulsion Laboratory, and for two years conducted microwave investigations of the moon.  I worked briefly at Cornell University's Arecibo Ionospheric Observatory, in Puerto Rico.

After returning to JPL's Space Sciences Division, I resumed planetary radio astronomy investigations of the moon and planets.  Using radio telescopes throughout the world, I constructed radiometric maps at a variety of wavelengths and lunar phases which remain unsurpassed in quality and comprehensiveness to this day.  Analysis of these maps showed that the thermophysical properties of the uppermost few centimeters of the lunar regolith are very similar over the entire near-side of the moon (with the one exception of greater ilmenite content in Mare Tranquility), which still provides the strongest argument for generalizing Apollo in situ findings.

In 1968 I accepted leadership of JPL's Radio Astronomy Group.  I wrote the software for controlling the 18-foot radio telescope at Table Mountain Observatory, and performed pointing and antenna property calibrations.  One fateful day a lightning strike of the antenna destroyed the computer and other equipment that was needed for a long-planned monitoring programme of Venus, and by coincidence this signalled a shift in my interests in the direction of portable ground-based systems for studying the weather.

In 1975 I joined JPL's Observational Systems Division and began applying radio astronomy remote sensing techniques to the study of atmospheric science problems.  Since then I provided principal investigator leadership for 41 field experiments, using ground-based and airborne microwave remote sensor systems.

Ground-based instruments were developed and used to study spatial and temporal properties of line-of-sight contents of atmospheric water vapor and cloud liquid water.  Ground-based passive microwave systems were developed for obtaining air temperature profiles.  I pioneered in developing calibration techniques for water vapor radiometers as well as in the optimum use of combined mulit-frequency/multi-angle temperature profilers.  These radiometer systems were used in a variety of studies, including pollution dispersion (mixing layer depth), stratus cloud formation and evolution (in collaboration with UCLA), demonstration of aviation icing hazard warnings near airports (Buffalo, NY), and numerous performance demonstrations using radiosondes for validation.

I developed and flew an airborne microwave temperature profiler, the first instrument of its kind, in support of a 1978 study of clear air turbulence, CAT.  Additional CAT studies were conducted using an improved temperature profiler installed in NASA's C-141 aircraft.  An instrument with further improvements was installed in NASA's ER-2 aircraft and was used in the 1987 Stratospheric-Tropospheric Exchange Project, STEP.   Six months later, the ER-2 Microwave Temperature Profiler was one of 25 instruments participating in the first NASA-coordinated international airborne investigation of stratospheric ozone depletion, the Airborne Antarctic Ozone Experiment, AAOE (Punta Arenas, Chile, 1987).  The MTP instrument, in addition to providing mesoscale meteorology context for in situ measurements during this mission, also discovered that Antarctic mountain waves extend above the tropopause and throughout the region of ozone destruction, and provide for mechanisms to enhance "polar stratospheric cloud" (PSC) formation.

The same MTP was used during the 1989 Airborne Arctic Science Experiment, AASE I, based in Norway, during which I discovered that air parcel trajectories exhibit vertical "wrinkles" and therefore air parcels experience fluctuations in temperature.  This discovery has implications for the understanding of PSC formation and evolution.  During AASE II (Norway, Alaska, Maine 1991/92), MTP instruments were flown aboard both participating NASA aircraft, the DC-8 and an ER-2.  The MTP flew on 49 ER-2 flights during the Airborne Southern Hemisphere Ozone Experiment/Measurements for Assessing the Effects of Stratospheric Aircraft, ASHOE/MAESA, based in New Zealand and Hawaii, throughout 1994, which led to studies of tracer filament temperature signature anomalies.  The MTP also flew during the ER-2 Stratospheric Tracers of Atmospheric Transport, STRAT flights of 1995 and 1996, which were based in Califronia and Hawaii.  The DC-8 MTP flew during the 1995 and 1996 Tropical Ozone Transport Experiment/Vortex Ozone Transport Experiment, TOTE/VOTE, based in Hawaii, Alaska, Iceland and California.  These flights have provided intriguing new information on meridional circulation.

An improved DC-8 MTP flew during the 1996 Subsonic Aircraft Contrail and Cloud Effects Study, SUCCESS, flights based in Kansas.  These data were used to derive the first-ever 2-D isentrope topography for a mountain wave event over Colorado, allowing for quantification of cooling and heating histories of air parcels associated with lee wave clouds.  During 1997 the ER-2 MTP participated in each of the 3 Photochemistry of Ozone Loss in the Arctic Region in Summer, POLARIS, campaigns, based in Fairbanks, AK.  Isentrope surfaces were surprisingly smooth for this season and latitude.

The DC-8 MTP was used in the Fall of 1997 for the SASS Ozone and Nitrogen Oxides Experiment, SONEX, based in Ireland and Bangor, ME, for the study of atmospheric chemistry impacts of subsonic aircraft.  The ER-2 MTP was flown in an Air Force WB-57F during the Spring of 1998 for the Water Aerosol Mission, WAM, based in Texas.  Dr. Mahoney was co-investigator for the last two experiments.  I discontinued full-time employment September 25, 1998, and for two years was employed by Caltech's JPL as an "on-call" employee for the purpose of providing occasional assistance to Dr. M. J. Mahoney, who is now the MTP Principal Investigator.  Since October, 2000 I have worked as a consultant for JPL in continued support of airborne MTP projects.

PATENTS (1st page of each)

  "Microwave Temperature Profiler for Clear Air Turbulence Prediction," U. S. Patent #5,117,689, June 2, 1992.

  "System for Indicating Fuel-Efficient Aircraft Altitude," U. S. Patent #4,474,062, Oct. 2, 1984.

  "CAT Altitude Avoidance System," U. S. Patent #4,346,595, Aug. 31, 1982.

  "Preventing SST Unstart Using a Microwave Radiometer," U. S. Patent #6,209,821, Apr 3, 2001.

CONSULTING

   Rockwell International, 1991-1992, MTP for CAT
   NASA Dryden Flight Research Center, 2000 - present, CAT RRi warning algorithm evaluation
   JPL, 2000- present, MTP calibration idiosyncracies, data analyses & ozone hole studies

PRE-RETIREMENT LINKS

    MTP Origins recalling the early days of water vapor radiometers, ground-based temperature profilers, and airborne profilers
    Microwave Temperature Profiler home page (maintained by M. J. Mahoney, JPL)
    Recollections of history of JPL atmospheric science experiences (maintained by M. J. Mahoney, JPL)

POST-RETIREMENT LINKS (that I maintain)

    Clear Air Turbulence home page
    Ozone Hole Mission Support home page
    General Meteorology Studies home page
    Personal Home page (with links to all of the above, plus stuff that "really matters")
 

PUBLICATIONS

Gary, B. L., "Mesoscale Temperature Fluctuations", submitted to Journal of the Atmospheric Sciences (2002)

Gary, B. L., "Mesoscale Fluctuation Amplitude Model", submitted to Journal of the Atmospheric Sciences (2002)

Jensen, E. J., O. B. Toon, A. Tabazadeh, G. W. Sachse, B. E. Anderson, K. R. Chan, C. W. Twohy, B. Gandrud, S. M. Aulenbach, A. Heymsfield, J. Hallett, B. Gary, "Ice Nucleation Processes in Upper Tropospheric Wave-Clouds Observed During SUCCESS," Geophys. Res. Lett., 25, 1363-1366, May 1, 1998.

Dean-Day, J., K. R. Chan, S. W. Bowen, T. P. Bui, B. L. Gary, M. J. Mahoney, "Dynamics of Rocky-Mountain Lee Waves Observed During SUCCESS," Geophys. Res. Lett., 25, 1351-1354, May 1, 1998.

Burris, J., W. Heaps, B. Gary, W. Hoegy, L. Lait, T. McGee, M. Gross, U. Singh, "Lidar Temperature Measurements During the TOTE/VOTE Mission," J. Geophys. Res., 103, 3505-3510, 1998.

Hintsa, E. J., K. A. Boering, E. M. Weinstock, J. G. Anderson, B. L. Gary, L. Pfister, B. C. Daube, S. C. Wofsy, M. Lowenstein, J. R. Podolske, J. J. Margitan, T. P. Bui, "Troposphere-to-Stratosphere Transport in the Lowermost Stratosphere from Measurements of H2O, CO2, N2O and O3," Geophys. Res. Lett., 25, 2655-2658, July 15, 1998.

Tabazadeh, A., O. B. Toon, B. L. Gary, J. T. Bacmeister, M. R. Schoeberl, "Observational Constraints on the Formation of Type Ia Polar Stratospheric Clouds," Geophys. Res. Lett., 23, 2109-2112, Aug. 1, 1996.

Bacmeister, Julio T., Stephen D. Eckermann, Paul A. Newman, Leslie Lait, K. Roland Chan, Max Lowenstein, Michael H. Proffitt, Bruce L. Gary, "Stratospheric Horizontal Wavenumber Spectra of Winds, Potential Temperature, and Atmospheric Tracers Observed by High-Altitude Aircraft," J. Geophys. Res., 101, D5, 9441-9470, Apr. 27, 1996.

Murphy, D. M., B. L. Gary, "Mesoscale Temperature Fluctuations and Polar Stratospheric Clouds,"  J. Atmos. Sci., 52, 1753-1760, May 15, 1995.

Weinheimer, A. J., J. G. Walega, B. A. Ridley, B. L. Gary, D. R. Blake, N. J. Blake, F. S. Rowland, G. W. Sachse, B. E. Anderson, J. E. Collins, "Meridional Distribution of NOx, NOy, and Other Species in the Lower Stratosphere and Upper Troposphere During AASE II," Geophys. Res. Lett., 21, 2583-2586, Nov. 15, 1994.

Bacmeister, J. T., P. A. Newman, B. L. Gary, K. R. Chan, "An Algorithm for Forecasting Wave-Related Turbulence in the Stratosphere," Weather and Forecasting, 9, 2, June 1994.

Pueschel, R. F., G. V. Ferry, S. Verma, S. D. Howard, B. Gary, J. M. Livingston, P. Newman, J. E. Dye, D. Baumgardner, "Northern Polar Vortex Aerosol Variability," submitted to Geophys. Res. Letters, June 1993.

Chan, K. R., L. Pfister, T. P. Bui, S. W. Bowen, J. Dean-Day, B. L. Gary, D. W. Fahey, K. K. Kelly, C. R. Webster, and R. D. May, "A Case Study of the Mountain Lee Wave Event of January 6, 1992," Geophys. Res. Lett, 20, 2551-2554, Nov. 19, 1993.

Toon, O. B., E. V. Browell, B. Gary, R. Pueschel, P. Russell, M. Schoeberl, G. C. Toon, F. Valero, H. Selkirk, J. Jordan, "Heterogeneous Reaction Probabilities, Solubilities, and Physical State of Cold Sulfuric Acid Aerosols," Science, August 27, 1993.

Pfister, L., K. R. Chan, T. P. Bui, S. Bowen, M. Legg, B. Gary, K. Kelly, M. Proffitt, W. Starr, "Gravity Waves Generated by a Tropical Cyclone During the STEP Tropical Field Program:  A Case Study," J. Geophys. Res., 98, D5, 8611-8638, May 20, 1993.

Dye, J. E., B. W. Gandrud, S. R. Kawa, K. K. Kelly, M. Lowenstein, G. V. Ferry, K. R. Chan, and B. L. Gary, "Particle Size Distributions in Arctic Polar Stratospheric Clouds: Growth and Nucleation of Sulfuric Acid Droplets and Implications for Cloud Formation," J. Geophys. Res., 97, 8015-8034, May 30, 1992.

Gary, B. L. and S. J. Keihm, "Microwave Sounding Units and Global Warming," Science, 251, 316, 1991 Jan 18.

Bacmeister, J. T., M. R. Schoeberl, L. R. Lait, P. A. Newman and B. Gary, "Small-Scale Waves Encountered During AASE," Geophys. Res. Lett., 17, 349-352, 1990.

Bacmeister, J. T. and B. Gary, "ER-2 Mountain Wave Encounter Over Antarctica: Evidence for Blocking," Geophys. Res. Lett., 17, 81-84, 1990.

Gandrud, R. W., J. E. Dye, D. Baumgardner, G. V. Ferry, M. Lowenstein, K. R. Chan, L. Sanford, B. Gary and K. Kelly, "The January 30, 1989 Arctic Polar Stratospheric Cloud (PSC) Event: Evidence for a Mechanism of Dehydration," Geophys. Res. Lett., 17, 457-460, 1990.

Lait, R. L., M. R. Schoeberl, P. A. Newman, M. H. Proffitt, M. Lowenstein, J. R. Podolske, S. E. Strahan, K. R. Chan, B. Gary, J.J. Margitan, E. Browell, M. P. McCormick and A. Torres, "Reconstruction of O3 and N2O Fields from ER-2, DC-8, and Balloon Observations, Geophys. Res. Lett., 17, 521-524, 1990.

Gary, B. L, "Observational Results Using the Microwave Temperature Profiler During the Airborne Antarctic Ozone Experiment," J. Geophys. Res., 94, 11,223-11,231, 1989.

Denning, R. F., S. L. Guidero, G. S. Parks and B. L. Gary, "Instrument Description of the Airborne Microwave Temperature Profiler," J. Geophys. Res., 94, 16,757-16,765, 1989.

Hartmann, D. L., K. R. Chan, B. L. Gary, M. R. Schoeberl, P. A. Newman, R. L. Martin, M. Lowenstein, J. R. Podolske and S. E. Strahan, "Potential Vorticity and Mixing in the South Polar Vortex During Spring," J. Geophys. Res., 94, 11,625-11,640, 1989.

Proffitt, M. H., K. K. Kelly, J. A. Powell and B. L. Gary, "Evidence for Diabatic Cooling and Poleward Transport Within and Around the 1987 Antarctic Ozone Hole," J. Geophys. Res., 94, D14, 16,797-16,813, 1989.

Proffitt, M. H., J. A. Powell, A. F. Tuck, D. W. Fahey, K. K. Kelly, A. J. Krueger, M. R. Schoeberl, B. L. Gary, J. J. Margitan, K. R. Chan, M. Lowenstein and J. R. Podolske, "A Chemical Definition of the Boundary of the Antarctic Ozone Hole," J. Geophys. Res., 94, D9, 11,437-11,448, 1989.

Wilson, J. C., M. Lowenstein, D. W. Fahey, B. Gary, S. D. Smith, K. K. Kelly, G. V. Ferry and K. R. Chan, "Observations of Condensation Nuclei in the Airborne Antarctic Ozone Experiment: Implications for New Particle Formation and Polar Stratospheric Cloud Formation," J. Geophys. Res., 94, D14, 16,437-16,448, 1989.

Schoeberl, M. R., L. R. Lait, P. A. Newman, R. L. Martin, M. H. Proffitt, D. L. Hartmann, M. Lowenstein, J. Podolske, S. E. Strahan, J. Anderson, K. R. Chan and B. Gary, "Reconstruction of the Constituent Distribution and Trends in the Antarctic Polar Vortex From ER-2 Flight Observations," J. Geophys. Res., 94, D14, 16,815-16,845, 1989.

Conel, James E., Robert O. Green, Veronique Carrere, Jack S. Margolis, Ronald E. Alley, Gregg Vane, Carol L. Bruegge, and Bruce L. Gary, "Atmospheric Water Mapping with the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS)," Conference Procedings, JPL Publication 87-38, 1987.

Treuhaft, R. N., C. D. Edwards, B. L. Gary, G. E. Lanyi, S. E. Robinson, "Temporal Water Vapor Fluctuations for Phase-Delay Interferometric Geodesy," EOS, 67, 914, 1986.

Gary, B. L., S. J. Keihm and M. A. Janssen, "Optimum Strategies and Performance for the Remote Sensing of Path-Delay Using Ground-Based Microwave Radiometers," IEEE Trans. Geosci. Remote Sensing, GE-23, 479-484, 1985.

Gary, B. L., "Clear Air Turbulence Avoidance Using an Airborne Microwave Radiometer," AIAA Pap., AIAA-84-0273, 1984.

Gary, B. L., "An Airborne Remote Sensor for the Avoidance of Clear Air Turbulence," AIAA Pap., AIAA-81-0297, 1981.

Janssen, M. A., B. L. Gary, S. Gulkis, E. T. Olsen, F. S. Soltis and N. I. Yamane, "The Table Mountain 8-mm Wavelength Interferometer," IEEE Trans. Antennas Propagation, AP-27, 759-763, 1979.

Keihm, S. J. and B. L. Gary, "Comparison of Theoretical and Observed 3.55 cm Wavelength Brightness Temperature Maps of the Full Moon," Proc. Lunar Sci. Conf. 10th, 2311-2319, 1979.

Gary, B. L. and S. J. Keihm, "Interpretation of Ground-Based Microwave Measurements of the Moon Using a Detailed Regolith Properties Model," Proc. Lunar Planet. Sci. Conf. 9th, 2885-2900, 1978.

Gary, B. L., "Jupiter, Saturn and Uranus Disk Temperature Measurements at 2.07 and 3.56 cm," Atronom. J., 79, 318-320, 1974.

Gulkis, S., B. Gary, M. Klein and C. Stelzried, "Observations of Jupiter at 13-cm Wavelength During 1969 and 1971," Icarus, 18, 181-191, 1973.

Gary, B. L., E. T. Olsen and P. W. Rosenkranz, "Radio Observations of Cygnus X-3 and the Surrounding Region," Nature, 95, 128-130, 1972.

Gulkis, S. and B. Gary, "Circular Polarization and Total Flux Measurements of Jupiter at 13.1 cm Wavelength," Astronom. J., 76, 12-16, 1971.

Gary, B. and S. Gulkis, "New Circular Polarization Measurements of Jupiter's Decimeter Radiation," Astronom. J., 158, L193-195, 1969.

Gary, B., "Results of a Radiometric Moon-Mapping Investigation at 3 Millimeters Wavelength," Astrophys. J., 147, 245-254, 1967.

Gary, B., "Mercury's Microwave Phase Effect," Astronom. J., 149, L141-145., 1967.

Gary, B., J. Stacey and F. D. Drake, "Radiometric Mapping of the Moon at 3 Millimeters Wavelength," Astrophys. J., Supp. 108, XII, 239-262, 1965.

Gary, B., "An Investigation of Jupiter's 1400 Mc/sec Radiation," Astronom. J., 68, 568-572, 1963.

Miller, A. C. and B. L. Gary, "Measurements of the Decimeter Radiation from Jupiter," Astronom. J., 67, 727-731, 1962.
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This site opened:  September 25, 1998.  Last Update:  July 5, 2002