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Helen Worden

Helen  Worden's Picture
NCAR Atmospheric Chemistry Division
PO Box 3000
Boulder, CO 80307

Helen Worden
Science Team
Tropospheric Chemistry/Calibration

  • Bachelor of Arts, Physics (magna cum laude), University of Colorado, Boulder, Colorado (1986)
  • Master of Science, Physics, Cornell University, Ithaca, New York (1989)
  • Ph.D. in Experimental Elementary Particle Physics, Cornell University, Ithaca, New York (1992)

Research Interests
  • Instrument calibration and retrieval algorithms for atmospheric remote sensing
  • Global air pollution sources and transport
  • Impact of biomass burning on atmospheric chemistry

Professional Experience
  • National Center for Atmospheric Research, Project Scientist (2007-Present)
  • Jet Propulsion Laboratory/ California Inst. of Technology, Senior Member of Technical Staff (1993-2007)
  • Cornell University Laboratory of Nuclear Studies (1987-1993)

Selected Awards
  • NASA Exceptional Achievement Medal for Leading the algorithm development for the Earth Observing System's Aura Tropospheric Emission Spectrometer that is providing unprecedented information about Earth's lower atmosphere (2006)
  • NASA Group Achievement Award, Tropospheric Emission Spectrometer (Instrument and Ground Data System) (2005)

Selected Publications
  1. Nassar, R., J. A. Logan, H. M. Worden, I. A. Megretskaia, K. W. Bowman, G. B. Osterman, A. M. Thompson, D. W. Tarasick, S. Austin, H. Claude, M. K. Dubey, W. K. Hocking, B. J. Johnson, E. Joseph, J. Merrill, G. Morris, M. Newchurch, et al., Validation of Tropospheric Emission Spectrometer (TES) Nadir Ozone Profiles Using Ozonesonde Measurements, J. Geophys. Res., 113, D15S17, doi:10.1029/2007JD008819, May 7, 2008.
  2. 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.
  3. Shephard, M. W., H. M. Worden, K. E. Cady-Pereira, M. Lampel, M. Luo, K. W. Bowman, E. Sarkissian, R. Beer, D. M. Rider, D. C.Tobin, H. E. Revercomb, B. M. Fisher, D. Tremblay, S. A. Clough, G. B. Osterman, M. Gunson, Tropospheric Emission Spectrometer Nadir Spectral Radiance Comparisons, J. Geophys. Res., 113, D15S05, doi:10.1029/2007JD008856, April 22, 2008.
  4. Worden, H. M., K. W. Bowman, J. R. Worden, A. Eldering and R. Beer, Satellite measurements of the clear-sky greenhouse effect from tropospheric ozone, Nature Geoscience, doi:10.1038/ngeo182, April 20, 2008.
  5. Bowman, K. W., D. Jones, J. Logan, H. Worden, F. Boersma, R. Chang, S. Kulawik, G. Osterman, and J. Worden, Impact of surface emissions to the zonal variability of tropical tropospheric ozone and carbon monoxide for November 2004, Atmos. Chem. Phys. Discuss., 8, 1505-1548, 2008.
  6. Luo, M., C. Rinsland, B. Fisher, G. Sachse, G. Diskin, J. Logan, H. Worden, S. Kulawik, G. Osterman, A. Eldering, R. Herman and M. Shephard, TES carbon monoxide validation with DACOM aircraft measurements during INTEX-B 2006, J. Geophys. Res., 112, D24S48, doi:10.1029/2007JD008803, December 20, 2007.
  7. Luo, M., C. P. Rinsland, C. D. Rodgers, J. A. Logan, H. Worden, S. Kulawik, A. Eldering, A. Goldman, M. W. Shephard, M. Gunson, and M. Lampel, Comparison of carbon monoxide measurements by TES and MOPITT: the influence of a priori data and instrument characteristics on nadir atmospheric species retrievals, J. Geophys. Res., 112, D09303, doi:101029/2006JD007663, May 3, 2007.
  8. Jourdain, L., H. M. Worden, J. R. Worden, K. Bowman, Q. Li, A. Eldering, S. S. Kulawik, G. Osterman, K. F. Boersma, B. Fisher, C. P. Rinsland, R. Beer, M. Gunson, Tropospheric vertical distribution of tropical Atlantic ozone observed by TES during the Northern African biomass burning season, Geophys. Res. Lett., 34, L04810, doi:10.1029/2006GL028284, February 23, 2007.
  9. 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.
  10. Shim, C., Q. Li, M. Luo, S. Kulawik, H. Worden, J. Worden, A. Eldering, G. Diskin, G. Sachse, A. Weinheimer, D. Knapp, D. Montzca, and T. Campos, Characterizing mega-city pollution with TES O3 and CO measurements, Atmos. Chem. Phys. Discuss., 7, 15189-15212, Discussion paper, 2007.
  11. Rinsland, C. P., M. Luo, J. A. Logan, R. Beer, H. M. Worden, J. R. Worden, K. Bowman, S. S. Kulawik, D. Rider, G. Osterman, M. Gunson, A. Goldman, M. Shephard, S. A. Clough, C. Rodgers, M. Lampel, and L. Chiou, Nadir Measurements of carbon monoxide distributions by the Tropospheric Emission Spectrometer onboard the Aura Spacecraft: Overview of analysis approach and examples of initial results, Geophys. Res. Lett., 33, L2280610.1029/2006GL027000, November 22, 2006.
  12. Clough, S.A.; Shephard, M.W.; Worden, J.; Brown, P.D.; Worden, H.M.; Luo, M.; Rodgers, C.D.; Rinsland, C.P.; Goldman, A.; Brown, L.; Kulawik, S.S.; Eldering, A.; Lampel, M.C.; Osterman, G.; Beer, R.; Bowman, K.; Cady-Pereira, K.E.; Mlawer, E.J., Forward Model and Jacobians for Tropospheric Emission Spectrometer Retrievals, IEEE Trans. Geosci. Remote Sensing, 44, 1308- 1323, May 2006.
  13. Kulawik, S.S.; Worden, H.; Osterman, G.; Luo, M.; Beer, R.; Kinnison, D.E.; Bowman, K.W.; Worden, J.; Eldering, A.; Lampel, M.; Steck, T.; Rodgers, C.D., TES Atmospheric Profile Retrieval Characterization: An Orbit of Simulated Observations, IEEE Trans. Geosci. Remote Sensing, 44, 1324- 1333, May 2006.
  14. H. Worden; Beer, R.; Bowman, K.W.; Fisher, B.; Luo, M.; Rider, D.; Sarkissian, E.; Tremblay, D.; Zong, J., TES Level 1 Algorithms: Interferogram Processing, Geolocation, Radiometric, and Spectral Calibration, IEEE Trans. Geosci. Remote Sensing, 44(5), 1288- 1296, May 2006.
  15. H. M. Worden, J. A. Logan, J. R. Worden, R. Beer, K. Bowman, S. A. Clough, A. Eldering, B. M. Fisher, M. R. Gunson, R. L. Herman, S. S. Kulawik, M. C. Lampel, M. Luo, I. A. Megretskaia, G. B. Osterman, M.W. Shephard, "TES Comparisons to Ozonesonide Profiles:Methods and Initial Results," accepted, JGR-Atmospheres (2006)
  16. J. Worden, S.S. Kulawik, M.W. Shephard, S.A.. Clough, H. Worden, K. Bowman, A. Goldman,"Predicted errors of tropospheric emission spectrometer nadir retrievals from spectral window selection," i>J. Geophys. Res., Vol. 109, No. D9, D09308 (May 2004)
  17. K. Bowman, J. Worden, T. Steck, H. Worden, S.A. Clough, C. Rodgers, "Capturing Tropospheric Ozone Time Variability: A Study Using TES Nadir Retrieval Simulations," J. Geophys Res., 107(D23), 4723 (2002)
  18. V.J. Realmuto and H.M. Worden, "Impact of atmospheric water vapor on the thermal infrared remote sensing of volcanic sulfur dioxide emissions: A case study from the Pu'u 'O'o vent of Kilauea Volcano, Hawaii." J. Geophys. Res. 105, No. B9, p. 21,497 (2000)
  19. K.W. Bowman, H.M. Worden and R. Beer, "Instrument line-shape modeling and correction for off-axis detectors in Fourier-transform spectrometry," Appl. Opt. 39: (21) 3765-3773, (2000)
  20. H. Worden, R. Beer and C. Rinsland, "Airborne infrared spectroscopy of 1994 western wildfires," J. Geophys Res., 102(D1), 1287 (1997)