GFDL/NOAA
Forrestal Campus, US Route 1
PO Box 308, Princeton, NJ  08542		 Tel: 609-987-5064
Fax: 609-987-5063		 http://www.gfdl.noaa.gov/~atw
Andrew.Wittenberg "at" noaa.gov

Dr. Andrew T. Wittenberg

Curriculum Vitae - July 2008


Education
Doctor of Philosophy, Atmospheric and Oceanic Sciences, Princeton University, June 2002
Dissertation: ENSO Response To Altered Climates
Advisor: George Philander
Bachelor of Science, summa cum laude, Physics, Oregon State University, June 1995
Minor in Computer Science

Research Interests

  • coupled ocean/atmosphere interactions in the tropics; El Niño and climate change
  • seasonal-to-interannual forecasting and predictability
  • multivariate analysis, statistical/dynamical modeling
  • ocean data assimilation
  • dynamical systems

Professional Experience
2004 - present Physical Scientist, Climate Dynamics and Prediction Group, GFDL/NOAA
2002 - 2004 Postdoctoral Research Associate, Atmospheric and Oceanic Sciences, Princeton University
1997 - 2002 Research Assistant with Prof. George Philander, Atmospheric and Oceanic Sciences, Princeton University
1998 - 2000 Teaching Assistant, Atmospheric and Oceanic Sciences, Princeton University
1995 - 1997 Research Assistant with Prof. Jeffrey Anderson, GFDL/NOAA
1994 - 1995 Research Assistant with Prof. William Hartmann, Physics, Michigan State University
1993 Research Assistant with Prof. John Gardner, Physics, Oregon State University


Fellowships
2002 - 2004 Postdoctoral Fellow, Atmospheric and Oceanic Sciences, Princeton University
1998 - 2001 NASA Earth System Science Fellow
1996 - 1998 National Science Foundation Graduate Research Fellow
1991 - 1995 National Merit Scholar
1991 - 1995 Presidential Scholar, Oregon State University
1993 - 1995 College of Science Scholar, Oregon State University
1994 - 1995 Phi Kappa Phi Scholar

Publications

  1. Guilyardi, E., A. Wittenberg, A. Fedorov, M. Collins, C. Wang, A. Capotondi, G. J. van Oldenborgh, and T. Stockdale, 2008: Understanding El Niño in ocean-atmosphere general circulation models: Progress and challenges.  Bull. Amer. Meteor. Soc., accepted.
  2. Kim, D., J.-S. Kug, I.-S. Kang, F.-F. Jin, and A. T. Wittenberg, 2008: Tropical Pacific impacts of convective momentum transport in the SNU coupled GCM.  Climate Dyn., DOI:10.1007/s00382-007-0348-4.
  3. Gebbie, G., I. Eisenman, A. Wittenberg, and E. Tziperman, 2007: Could ocean-modulated wind bursts lead to better El Niño forecasts?  Bull. Amer. Meteor. Soc., 88 (9), 1356-1357.
  4. Gebbie, G., I. Eisenman, A. Wittenberg, and E. Tziperman, 2007: Modulation of westerly wind bursts by sea surface temperature: A semistochastic feedback for ENSO.  J. Atmos. Sci., 64, 3281-3295.
  5. Zhang, S., M. J. Harrison, A. Rosati, and A. Wittenberg, 2007: System design and evaluation of coupled ensemble data assimilation for global oceanic climate studies.  Mon. Wea. Rev., 135, 3541-3564.
  6. Sun, C., M. M. Rienecker, A. Rosati, M. Harrison, A. Wittenberg, C. L. Keppenne, J. P. Jacob, and R. M. Kovach, 2007: Comparison and sensitivity of ODASI ocean analyses in the tropical Pacific.  Mon. Wea. Rev., 135, 2242-2264.
  7. Vecchi, G. A., B. J. Soden, A. T. Wittenberg, I. M. Held, A. Leetmaa, and M. J. Harrison, 2006: Weakening of tropical Pacific atmospheric circulation due to anthropogenic forcing.  Nature, 44, 73-76.  DOI:10.1038/nature04744. See full text and supplementals.
  8. Capotondi, A., A. Wittenberg, and S Masina, 2006: Spatial and temporal structure of tropical Pacific interannual variability in 20th century coupled simulations.  Ocean Modelling, 15, 274-298.
  9. Wittenberg, A. T., A. Rosati, N.-C. Lau, and J. J. Ploshay, 2006: GFDL's CM2 global coupled climate models.  Part III: Tropical Pacific climate and ENSO.  J. Climate, 19, 698-722.
  10. Gnanadesikan et al., 2006: GFDL's CM2 global coupled climate models, Part II: The baseline ocean simulation.  J. Climate, 19, 675-697.
  11. Delworth et al., 2006: GFDL's CM2 global coupled climate models, Part I: Formulation and simulation characteristics.  J. Climate, 19, 643-674.
  12. Vecchi, G. A., A. T. Wittenberg, and A. Rosati, 2006: Reassessing the role of stochastic forcing in the 1997-8 El Niño.  Geophys. Res. Lett., 33, L01706.  DOI:10.1029/2005GL024738.
  13. Zhang, S., M. J. Harrison, A. T. Wittenberg, A. Rosati, J. L. Anderson, and V. Balaji, 2005: Initialization of an ENSO forecast system using a parallelized ensemble filter.   Mon. Wea. Rev., 133, 3176-3201.
  14. The GFDL Global Atmospheric Model Development Team, 2004: The new GFDL global atmosphere and land model AM2/LM2: Evaluation with prescribed SST simulations.  J. Climate, 17, 4641-4673.
  15. Wittenberg, A. T., 2004: Extended wind stress analyses for ENSO.  J. Climate, 17, 2526-2540.
  16. Zhang, S., J. L. Anderson, A. Rosati, M. Harrison, S. P. Khare, and A. T. Wittenberg, 2004: Multiple time level adjustment for data assimilation. Tellus A, 56, 2-15.
  17. Fedorov, A. V. , S. L. Harper, S. G. Philander,  B. Winter, and A. Wittenberg, 2003: How predictable is El Nino?  Bull. Amer. Meteor. Soc., 84, 911-919.
  18. Wittenberg, A. T., 2002: ENSO response to altered climates.  Ph.D. thesis, Princeton University. 475pp.
  19. Wittenberg, A. T., and J. L. Anderson, 1998: Dynamical implications of prescribing part of a coupled system: Results from a low-order model.  Nonlin. Proc. Geophys., 5, 167-179.
  20. Hartmann, W. M., and A. Wittenberg, 1996: On the externalization of sound images.  J. Acoust. Soc. Am., 99, 3678-3688.

Talks

  1. Wittenberg, A. T., 2008: Natural modulation of ENSO in the GFDL CM2.1 coupled GCM.
  2. Wittenberg, A. T., K. Eckerle, G. Vecchi, S. Song, and A. Rosati, 2008: Indonesian Throughflow transports, variability, and change in the GFDL coupled GCMs.  INSTANT Workshop, Lamont-Doherty Earth Observatory, Palisades, NY, 29 May 2008.
  3. Wittenberg, A. T., and M. Winton, 2008: Coupled climate modeling at GFDL.  NOAA Climate Working Group, Climate Research and Modeling (CRM) Program Review, Hyatt Regency, Princeton, NJ, 25 March 2008.
  4. Wittenberg, A. T., 2006: ENSO dynamics and predictability in the GFDL coupled models.  Workshop on ENSO Dynamics and Predictability, Seoul National University, Seoul, South Korea, 12 September 2006. Also in OpenOffice.
  5. Wittenberg, A. T., and A. Rosati, 2006: What controls the period and amplitude of ENSO?  11th Annual CCSM Workshop, Breckenridge, CO, 20 June 2006.
  6. Wittenberg, A. T., G. A. Vecchi, and A. Rosati, 2006: Reassessing the role of stochastic forcing in the 1997-8 El Niño.  AGU Joint Assembly, Baltimore, MD, 25 May 2006.
  7. Vecchi, G. A., B. Soden, I. Held, A. Wittenberg, A. Leetmaa, and M. Harrison, 2006: Weakening of the Pacific Walker Circulation since the mid-19th Century.  AGU Joint Assembly, Baltimore, MD, 26 May 2006.
  8. Vecchi, G., Q. Song, A. Wittenberg, and M. Harrison, 2006: Coupled Indian Ocean intraseasonal variability.  AGU Joint Assembly, Baltimore, MD, 25 May 2006.
  9. Wittenberg, A. T., 2006: Simulated CO2-induced changes in tropical climate and variability.  NOAA Geophysical Fluid Dynamics Laboratory, Princeton, NJ, 22 March 2006.
  10. Eisenman, I., E. Tziperman, J. Gebbie, L. Yu, and A. Wittenberg, 2005: Feedbacks between El Nino and the "noise" that drives it: Modulation of westerly wind bursts by large-scale SST.  Boston University, 17 October 2005.
  11. Wittenberg, A. T., 2005: Climate sensitivities of ENSO: Bridging theories, observations, and modeling.  First Alexander von Humboldt International Conference on The El Niño Phenomenon and Its Global Impact, Guayaquil, Ecuador, 20 May 2005. Also in OpenOffice and PowerPoint. The abstract is here.
  12. Gebbie, G., I. Eisenman, E. Tziperman, and A. Wittenberg, 2005: Westerly wind bursts: ENSO's tail rather than dog?  EGU General Assembly, Vienna, Austria, 28 April 2005. Also in OpenOffice and PowerPoint. The abstract is here.
  13. Wittenberg, A. T., 2005: On extended wind stress analyses for ENSO.   Stony Brook University, Stony Brook, New York, 2 February 2005. Also in PowerPoint.
  14. Wittenberg, A. T., G. Vecchi, T. Rosati, M. Harrison, I. Held, and T. Knutson, 2005: ENSO Modeling at GFDL.   Overview for Rick Rosen (Assistant Administrator, NOAA OAR) and Chet Koblinsky (NOAA/OAR Director for Climate), NOAA Geophysical Fluid Dynamics Laboratory, Princeton, NJ, 21 January 2005. Also in PowerPoint.
  15. Wittenberg, A. T., and G. A. Vecchi, 2004: Reassessing the role of stochastic forcing in ENSO events.
  16. Wittenberg, A. T., G. Vecchi, T. Rosati, M. Harrison, S. Zhang, I. Held, R. Gudgel, and the GFDL Model Development Teams, 2004: Simulation and prediction of El Niño at the Geophysical Fluid Dynamics Laboratory.   Oregon State University, Corvallis, OR, 11 November 2004.
  17. Rosati, A., M. Harrison, A. Wittenberg, and S. Zhang, 2005: NOAA/GFDL ocean data assimilation activities.  CLIVAR Workshop on Ocean Reanalysis, NCAR, Boulder, CO, 9 November 2004.
  18. Wittenberg, A. T., and A. Rosati, 2004: Tropical Pacific Climate & ENSO in the GFDL CM2/2.1 control simulations.  NOAA Geophysical Fluid Dynamics Laboratory, Princeton, NJ, 19 August 2004.  See also the CM2 handout and the CM2.1 handout.
  19. Galanti, E., M. Tippet, S. Zebiak, S DeWitt, A. T. Wittenberg, M. Harrison, T. Rosati, and M. Rienecker, 2004: On data assimilation and ENSO dynamical prediction.   International Research Institute for Climate Prediction, Palisades, NY, 30 June 2004.
  20. Wittenberg, A. T., and E. Galanti, 2004: Assessing the impact of stochastic forcing on ENSO events.  2004 Joint Assembly, Montreal, Canada, 19 May 2004.
  21. W. Stern, A. Rosati, R. Gudgel, M. Harrison, and A. T. Wittenberg, 2004: Subseasonal to interannual prediction sensitivities in the GFDL/FMS GCM.  84th AMS Annual Meeting, Seattle, WA, 13 January 2004.
  22. Wittenberg, A. T., T. Rosati, and I. Held, 2003: ENSO in the GFDL coupled model.  8th Annual CCSM Workshop, Breckenridge, CO, 24 June 2003.
  23. Wittenberg, A. T., and M. J. Harrison, 2003: A baseline statistical model for tropical Pacific wind stress anomalies.  Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, 17 February 2003.
  24. Wittenberg, A. T., 2002: ENSO response to altered climates. NOAA Geophysical Fluid Dynamics Laboratory, Princeton, NJ, 2 May 2002.
  25. Wittenberg, A. T., 2002: Understanding the sensitivity of ENSO to the tropical climatology.  International Research Institute for Climate Prediction, Palisades, NY, 11 January 2002.
  26. Wittenberg, A. T., 1996: Dynamics of tropical cyclones.  Workshop on Science for Tomorrow, Japan Association for Mathematical Sciences, Hokkaido, Japan, 27 July 1996.

Posters

  1. Anderson, W., A. Gnanadesikan, and A. Wittenberg, 2008: The role of ocean color in the variability of the tropical Pacific.  NASA Carbon Cycle & Ecosystems Joint Science Workshop, Adelphi, MD, 28 April 2008.
  2. Wittenberg, A. T., 2007: Addressing tropical biases in GFDL's global coupled climate models.
  3. Wittenberg, A. T., G. A. Vecchi, and A. Rosati, 2006: Simulated CO2-induced changes in tropical climate and variability.
  4. Capotondi, A., A. T. Wittenberg, and S. Masina, 2006: Temporal structure of ENSO in 20th century climate simulations.  13th Ocean Sciences Meeting, Honolulu, HI, 21 February 2006.
  5. Wittenberg, A. T., A. Rosati, N.-C. Lau, and J. J. Ploshay, 2005: GFDL's CM2 global coupled climate models: Tropical Pacific climate and ENSO.  10th Annual CCSM Workshop, Breckenridge, CO, 21-23 June 2005.
  6. Wittenberg, A. T., and A. Rosati, 2004: Tropical Pacific climate & variability in the GFDL CM2 global coupled GCM.
  7. Wittenberg, A. T., and A. Rosati, 2004: Sensitivities of ENSO: Lessons from the GFDL CM2 global coupled GCM.
  8. Wittenberg, A. T., and S. G. H. Philander, 2004: The Pacific cold tongue and ENSO: Sensitivity to the meridional wind stress climatology.  12th Ocean Sciences Meeting, Portland, OR, 30 January 2004.
  9. Wittenberg, A. T., and M. J. Harrison, 2003: A baseline statistical model for tropical Pacific wind stress anomalies.  14th Conference on Atmospheric & Oceanic Fluid Dynamics, San Antonio, TX, 11 June 2003.
  10. Wittenberg, A. T., 2002: What is the wind stress over the tropical Pacific?  AGU Fall Meeting, San Francisco, CA, 10 December 2002.
  11. Wittenberg, A. T., 1999: Modulation of ENSO by changes in tropical climate.  Eighth Conference on Climate Variations, Denver, CO, 15 September 1999.

Professional Activities
2006 - present Co-chair, GFDL Coupled Model Development Team (CMDT)
2002 - present GFDL Coupled Model Development Team (CMDT)
2002 - present GFDL Global Atmospheric Model Development Team (GAMDT)
2002 - present GFDL Ocean Model Development Team (OMDT)
2003 - present US CLIVAR Working Group on Correcting Tropical Biases
2005 Panelist for NOAA proposal review
2002 - 2005 Ocean Data Assimilation for Seasonal-to-Interannual Prediction (ODASI, a NOAA/CDEP consortium)

Reviewer for: AGU Geophysical Monographs
Geophysical Research Letters
Journal of the Atmospheric Sciences
Journal of Climate
Journal of Geophysical Research - Oceans
Journal of the Meteorological Society of Japan
NOAA CDEP proposals

Professional Societies
2002 - present American Geophysical Union

Advising

Undergraduates High School Students

Computer Experience

Honors
2008 NOAA OAR Outstanding Scientific Paper Award
for "System Design and Evaluation of Coupled Ensemble Data Assimilation for Global Oceanic Climate Studies" by Zhang, Harrison, Rosati, & Wittenberg, Monthly Weather Review, 2007
2007 NOAA OAR Outstanding Scientific Paper Award
for "Weakening of Tropical Pacific Atmospheric Circulation Due to Anthropogenic Forcing" by Vecchi, Soden, Wittenberg, Held, Leetmaa, & Harrison, Nature, 2006
1994 - present Phi Kappa Phi National Honor Society
1994 - 1995 Sigma Pi Sigma National Physics Honor Society
1994 - 1995 Mortar Board National Honor Society
1994 Rhodes Scholarship Finalist
1992 - 1994 Drucilla Smith University Scholastic Award
1992 - 1994 Waldo-Cummings University Leadership Award


Other Activities
2000 - present Frequent contributor to Ferret software and user's group
2004 - 2006 Board Member, GFDL Employees' Association
2000 TAO buoy operations, NOAA Research Vessel Ka'imimoana
1997 Summer School on Inverse Methods and Data Assimilation, OSU 
1996 Workshop on Science for Tomorrow, Hokkaido, Japan
1994 - 1995 President, Society of Physics Students, OSU
1994 - 1995 Physics Representative, OSU Science Student Council
1993 - 1995 Programmer and language tutor, English Language Institute, OSU 
1995 Volunteer, OSU Children's Motor Fitness Clinic
1993 - 1994 President, McNary Residence Hall, OSU
1993 - 1995 President, McNary Jugglers, OSU
1993 Programmer, Microflect Company, Inc., Salem, Oregon (now Valmont Industries)
1992 - 1993 Physics and math tutor, OSU

Personal Interests: running, cycling, hiking, skiing, ballroom & latin dancing, juggling, piano composition, martial arts