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PEOPLE

Robert Herman

Robert Herman's Picture
Address:
Jet Propulsion Laboratory
M/S 183-401
4800 Oak Grove Drive
Pasadena, CA 91109
Phone:
818.393.4720
Fax:
818.393.4445
Email:

Robert Herman
Science Team
Validation

Education
  • B.A. in Chemistry, University of Chicago, with general honors (1991)
  • M.S. in Geochemistry, California Institute of Technology (1993)
  • Ph.D. in Geochemistry, California Institute of Technology (1998)
Research Interests
  • Measurement of water and other long-lived gases in the upper troposphere/lower stratosphere (UTLS) from satellite and aircraft platforms
  • Infrared spectroscopy of water vapor and ice
  • Relative humidity and its role in ice cloud microphysical processes such as nucleation, growth, and evaporation
  • Distribution and transport of UTLS water, and its role in climate change
  • Physics and chemistry of aircraft condensation trails and rocket plumes
  • Validation of tropospheric measurements from TES and AIRS
Professional Experience
Jet Propulsion Laboratory (1998-present)
  • Principal Investigator, JPL Laser Hygrometers (1999-present)
  • Research Scientist, Atmospheric Laser Spectroscopy Group (2001-present)
  • Scientist, Atmospheric Laser Spectroscopy Group (1999-2001)
  • Caltech Postdoctoral Scholar (1998-1999)
Selected Awards
NASA Group Achievement Awards (six) for aircraft and balloon field missions
Selected Publications
  1. Shephard, M. W, R. L. Herman, B. M. Fisher, K. E. Cady-Pereira, S. A. Clough, V. H. Payne, et al., Comparison of Tropospheric Emission Spectrometer Nadir Water Vapor Retrievals with In Situ Measurements, J. Geophys. Res., 113, D15S24, doi:10.1029/2007JD008822, May 16, 2008.
  2. Lopez, J.P., A.M. Fridlind, H.-J. Jost, M. Loewenstein, A.S. Ackerman, T.L. Campos, E.M. Weinstock, D.S. Sayres, J.B. Smith, J.V. Pittman, A.G. Hallar, L.M. Avallone, S.M. Davis, R.L. Herman, CO signatures in subtropical convective clouds and anvils during CRYSTAL-FACE: An analysis of convective transport and entrainment using observations and a cloud-resolving model," J. Geophys. Res., 111, D09305, doi:10.1029/2005JD006104, 2006.
  3. Osterman, G., S.S. Kulawik, H.M. Worden, N.A.D. Richards, B.M. Fisher, A. Eldering, M.W. Shephard, L. Froidevaux, G. Labow, M. Luo, R.L. Herman, K.W. Bowman, and A. M. Thompson, Validation of Tropospheric Emission Spectrometer (TES) Measurements of the Total, Stratospheric and Tropospheric Column Abundance of Ozone, J. Geophys. Res., 113, D15S16, doi:10.1029/2007JD008801, May 7, 2008.
  4. Worden, H. M., J. Logan, J. R. Worden, R. Beer, K. Bowman, S. A. Clough, A. Eldering, B. Fisher, M. R. Gunson, R. L. Herman, S. S. Kulawik, M. C. Lampel, M. Luo, I. A. Megretskaia, G. B. Osterman, M. W. Shephard, Comparisons of Tropospheric Emission Spectrometer (TES) ozone profiles to ozonesodes: methods and initial results, J. Geophys. Res., 112, D03309, doi:10.1029/2006JD007258, February 15, 2007.
  5. Worden, J., K. Bowman, D. Noone, R. Beer, S. Clough, A. Eldering, B. Fisher, A. Goldman, M. Gunson, R. Herman, S. Kulawik, M. Lampel, M. Luo, G. Osterman, C. Rinsland, C. Rodgers, S. Sander, M. Shephard, and H. Worden, Tropospheric Emission Spectrometer observations of the tropospheric HDO/H 2 O ratio: Estimation approach and characterization, J. Geophys. Res., 111, D16309, doi:10.1029/2005JD006606, August 25, 2006.
  6. Gao, R.S., D.W. Fahey, P.J. Popp, T.P. Marcy, R.L. Herman, E.M. Weinstock, J.B. Smith, D.S. Sayres, J.V. Pittman, K.H. Rosenlof, T.L. Thompson, P.T. Bui, D.G. Baumgardner, B.E. Anderson, G. Kok, A.J. Weinheiner, "Measurements of relative humidity in a persistent contrail," Atmos. Env., 40, 1590-1600, 2006.
  7. Richard, E. C., A. F. Tuck, K. C. Aikin, K. K. Kelly, R. L. Herman, R. F. Troy, S. J. Hovde, K. H. Rosenlof, T. L. Thompson, D. M. Murphy and E. A. Ray, "High Resolution Airborne Profiles of CH4, O3 and Water Vapor near Tropical Central America in Late January - Early February 2004," J. Geophys. Res., in press, 2006.
  8. Popp, P.J., T.P. Marcy, E.J. Jensen, B. Kaercher, D.W. Fahey, R.S. Gao, T.L. Thompson, K.H. Rosenlof, E.C. Richard, R.L. Herman, E.M. Weinstock, J.B. Smith, R.D. May, H. Voemel, J.C. Wilson, A.J. Heymsfield, M.J. Mahoney, A.M. Thompson, "The observation of nitric acid-containing particles in the tropical lower stratosphere," Atmos. Chem. Phys. Discus., 6, 601-11, 2006.
  9. Heymsfield, A.J., A. Bansemer, S. Durden, T.P. Bui, and R.L. Herman, "Ice Microphysical observations in Hurricane Humberto: comparison with non-hurricane ice cloud layers," J. Atmos. Sci., 63(1), 288-308, 2006.
  10. Garrett, T.J., B.C. Navarro, C.H. Twohy, E.J. Jensen, D.G. Baumgardner, P.T. Bui, H. Gerber, R.L. Herman, A.J. Heymsfield, P. Lawson, P. Minnis, L. Nguyen, M. Poellot, S.K. Pope, F.P.J. Valero, E.M. Weinstock, "Evolution of a Florida cirrus anvil," J. Atmos. Res., 62, 2353-72, 2005.
  11. Jensen, E., J.B. Smith, L. Pfister, J.V. Pittman, E.M. Weinstock, D.S. Sayres, R.L. Herman, R.F. Troy, K. Rosenlof, T.L. Thompson, A. Fridlind, P. Hudson, D.J. Cziczo, A.J. Heymsfield, C. Schmitt, and J.C. Wilson, "Ice Supersaturations Exceeding 100% at the Cold Tropical Tropopause: Implications for Cirrus Formation and Dehydration," Atmos. Chem. Phys. Discus., 4, 7433-62, 2004.
  12. A. Gettelman, E.M. Weinstock, E. Fetzer, W.F. Irion, A. Eldering, E.C. Richard, K.H. Rosenlof, T.L. Thompson, J.V. Pittman, C.R. Webster, and R.L. Herman, "Validation of Aqua satellite data in the upper troposphere and lower stratosphere with in-situ aircraft," Geophys. Res. Lett., 31(22), L22107, doi: 10.1029/2004GL020730, 2004.
  13. Gao, R.-S., P.J. Popp, D.W. Fahey, T.P. Marcy, R.L. Herman, E.M. Weinstock, D.G. Baumgardner, T. J. Garrett, K.H. Rosenlof, T.L. Thompson, P.T. Bui, B.A. Ridley, S.C. Wofsy, O.B. Toon, M.A. Tolbert, B. Kaercher, T. Peter, P.K. Hudson, A.J. Weinheimer, A.J. Heymsfield, "Evidence That Nitric Acid Increases Relative Humidity in Low-Temperature Cirrus Clouds," Science, 303, 516-20, 2004.
  14. Herman, R.L., and A.J. Heymsfield, "Aircraft icing at low temperatures in Tropical Storm Chantal (2001)," Geophys. Res. Lett., 30(18), doi:10.1029/2003GL017746, 2003.
  15. Herman, R.L., K. Drdla, J.R. Spackman, D.F. Hurst, P.J. Popp, C.R. Webster, P.A. Romashkin, J.W. Elkins, E.M. Weinstock, B.W. Gandrud, G.C. Toon, M.R. Schoeberl, H.-J. Jost, E.L. Atlas, and T.P. Bui, "Hydration, dehydration, and the total hydrogen budget of the 1999-2000 winter Arctic stratosphere," J. Geophys. Res., 108(D5), doi:10.1029/2001JD001257, 2003.
  16. Danilin, M.Y. P.J. Popp, R.L. Herman, M.K.W. Ko, M.N. Ross, C.E. Kolb, D.W. Fahey, L.M. Avallone, D.W. Toohey, B.A. Ridley, O. Schmid, J.C. Wilson, D.G. Baumgardner, R.R. Friedl, T.L. Thompson, and J.M. Reeves, "Quantifying Uptake of HNO3 and H2O by Alumina Particles in Athena-II Rocket Plume," J. Geophys. Res., 108(D4), doi:10.1029/2002JD002601, 2003.
  17. Gates, A.M., L.M. Avallone, D.W. Toohey, A.P. Rutter, P.D. Whitefield, D.E. Hagen, A.R. Hopkins, M.N. Ross, P.F. Zittel, T.L. Thompson, R.L. Herman, and R.R. Friedl, "In situ measurements of carbon dioxide, 0.37 - 4.0 µm particles, and water vapor in the stratospheric plumes of small rockets," J. Geophys. Res., 107(D22), doi: 10.1029/2002JD002121, 2002.
  18. Weinstock, E.M., E.J. Hintsa, D.B. Kirk-Davidoff, J.G. Anderson, A.E. Andrews, R.L. Herman, C.R. Webster, M. Loewenstein, J.R. Podolske, and T.P. Bui, "Constraints on the seasonal cycle of stratospheric water vapor using in situ measurements from the ER-2 and a CO photochemical clock," J. Geophys. Res., 106(D19), 22707-24, 2001.
  19. Flocke, F., R.L. Herman, R.J. Salawitch, E. Atlas, C.R. Webster, S.M. Schauffler, R.A. Lueb, R.D. May, E.J. Moyer, K.H. Rosenlof, D.C. Scott, D.R. Blake, and T.P. Bui, "An examination of chemistry and transport processes in the tropical lower stratosphere using observations of long-lived and short-lived compounds obtained during STRAT and POLARIS," J. Geophys. Res., 104(D21), 26625-42, 1999.
  20. Scott, D.C., R.L. Herman, C.R. Webster, R.D. May, G. J. Flesch, and E.J. Moyer, "Airborne Laser Infrared Absorption Spectrometer (ALIAS-II) for in situ atmospheric measurements of N2O, CH4, CO, HCl, and NO2 from balloon or remotely piloted aircraft platforms," Applied Optics, 38(21), 4609-22, 1999.
  21. Herman, R.L., 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, 173-83, 1999.
  22. Herman, R.L., D.C. Scott, C.R. Webster, R.D. May, E.J. Moyer, R.J. Salawitch, Y.L. Yung, G.C. Toon, B. Sen, J.J. Margitan, K.H. Rosenlof, H.A. Michelsen, and J.W. Elkins, "Tropical entrainment time scales inferred from stratospheric N2O and CH4 observations," Geophys. Res. Lett., 25(15), 2781-4, 1998.