Dr. Andrew T. Wittenberg

Curriculum Vitae

Climate Variations and Predictability Group
Geophysical Fluid Dynamics Laboratory
US DOC/NOAA/GFDL
201 Forrestal Road, Princeton, NJ 08540-6649
Tel: +1-609-987-5064
Fax: +1-609-987-5063
Andrew.Wittenberg "at" noaa.gov
www.gfdl.noaa.gov/~atw
researchgate.net/profile/Andrew_Wittenberg
scholar.google.com/citations?user=n3qkCSMAAAAJ
orcid.org/0000-0003-1680-8963
researcherid.com/rid/G-9619-2013
scopus.com/authid/detail.url?authorId=6602864692

Research Interests

Education

Ph.D. in Atmospheric and Oceanic Sciences, Princeton University, June 2002
Dissertation: ENSO Response To Altered Climates
Advisor: Professor George Philander
 
M.S. in Atmospheric and Oceanic Sciences, Princeton University, October 1997
Thesis: Dynamical implications of prescribing part of a coupled system
Advisor: Professor Jeffrey L. Anderson
 
Bachelor of Science in Physics, summa cum laude, Oregon State University, June 1995
Minor in Computer Science

Professional Experience

2012 - present Physical Scientist, Climate Variability and Prediction Group, NOAA/GFDL
2004 - 2012 Physical Scientist, Climate Change, Variability and Prediction Group, NOAA/GFDL
2002 - 2004 Postdoctoral Research Associate, Atmospheric and Oceanic Sciences, Princeton University
1997 - 2002 Research Assistant with Professor George Philander, Atmospheric and Oceanic Sciences, Princeton University
1998 - 2000 Teaching Assistant, Atmospheric and Oceanic Sciences, Princeton University
1995 - 1997 Research Assistant with Professor Jeffrey L. Anderson, NOAA/GFDL
1994 - 1995 Research Assistant with Professor William Hartmann, Physics, Michigan State University
1993 Research Assistant with Professor John Gardner, Physics, Oregon State University

Awards and Honors

2015 Thomson Reuters Highly Cited Researcher
The World's Most Influential Scientific Minds 2015
"For researchers writing the greatest number of reports ranking among the top 1% most cited over the past decade."
Recipients worldwide: 3126 in all fields, 148 in the geosciences, 10 in NOAA, 7 at GFDL.
2015 U.S. Department of Commerce Gold Medal for Distinguished Achievement in the Federal Service
"For outstanding research, leading to improved capability to predict seasonal-to-decadal variations in regional hydrological conditions and extremes."
2014 U.S. Department of Commerce Silver Medal for Meritorious Federal Service
"For development and application of NOAA's first comprehensive Earth System Models that couple the carbon cycle and climate to project future changes."
2013 U.S. Department of Commerce Gold Medal for Distinguished Achievement in the Federal Service
"For original research and world scientific leadership in the modeling of atmospheric greenhouse gases and aerosols, and their interactions with climate."
Photo with Secretary of Commerce Rebecca Blank, and NOAA Administrator Jane Lubchenco
2011 GFDL Outstanding Scientific Paper Award
For "Are historical records sufficient to constrain ENSO simulations?"
by A. T. Wittenberg, Journal of Climate, 2009.
2009 American Meteorological Society Editors' Award
"For dependably thorough, scholarly, and constructive reviews."
Journal of Climate reviewer of the year for 2008.
2008 NOAA 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 Outstanding Scientific Paper Award
For "Weakening of Tropical Pacific Atmospheric Circulation Due to Anthropogenic Forcing"
by Vecchi, Soden, Wittenberg, Held, Leetmaa, & Harrison, Nature, 2006.
2002 - 2004 AOS Postdoctoral Fellowship, Princeton University
1998 - 2001 NASA Earth System Science Fellowship
1996 - 1998 National Science Foundation Graduate Research Fellowship
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 - 1995 Phi Kappa Phi Scholarship
1994 Rhodes Scholarship Finalist
1993, 1994, 1995 Paul Copson Memorial Scholar, Oregon State University
1992, 1993, 1994 Waldo-Cummings Outstanding Student Award
1992, 1993, 1994 Drucilla Smith University Scholastic Award
1991 - 1995 Presidential Scholar, Oregon State University
1991 - 1995 National Merit Scholar

Proposal Awards

9/1/2014 - 8/31/2017 Understanding tropical Pacific biases in climate simulations and initialized predictions (NOAA/CPO #GC14-250a)
Lead PI, with Y. Xue, G. Vecchi, T. Delworth, and A. Kumar
9/15/2014 - 9/14/2017 Understanding ENSO diversity and changes in climate models and observations (DOE #DE-SC0005110)
Co-PI, with F.-F. Jin (lead) and A. Timmermann
9/15/2010 - 9/14/2013 Assessing ENSO regime changes in a changing climate (DOE #103155)
Co-PI, with F.-F. Jin (lead) and A. Timmermann

Professional Activities

2013 - present Co-chair, ENSO in a Changing Climate (International CLIVAR Research Focus)
2012 - present Working Group on ENSO Diversity, US CLIVAR
2015 - present Backbone Task Team, Tropical Pacific Observing System 2020
2015 - present Modeling and Data Assimilation Task Team, Tropical Pacific Observing System 2020
2016 Co-chair, El Niño Southern Oscillation (ENSO) Diversity in a Changing Climate, PC005 (Session #7567), 2016 Ocean Sciences Meeting, New Orleans, Louisiana.
2015 Co-chair, Fourth CLIVAR workshop on the Evaluation of ENSO in Climate Models: ENSO in a Changing Climate. Paris, France.
2015 Co-chair, ENSO: Dynamics, Predictability and Modelling, Session NP2.1, EGU General Assembly, Vienna, Austria.
2014 Co-chair, ENSO: Dynamics, Predictability and Modelling, Session NP2.1, EGU General Assembly, Vienna, Austria.
2008 - 2013 Working Group on ENSO Metrics, International CLIVAR Pacific Panel
2013 Co-chair, ENSO: Dynamics, Predictability and Modelling, Session NP2.1, EGU General Assembly, Vienna, Austria.
2012 - 2013 Contributing Author, IPCC Fifth Assessment Report (AR5), Working Group I, Chapter 14
2012 - 2013 Expert Reviewer, IPCC Fifth Assessment Report (AR5), Working Group I, Chapters 2, 5, 9, and 14
2012 Co-chair, Five Controversies in Climate Science, A symposium honoring the contributions of S. George Philander.  Princeton University, Princeton, NJ, 6-7 September 2012.
2012 Co-chair, ENSO: Dynamics, Predictability and Modelling, Session NP2.1, EGU General Assembly, Vienna, Austria.
2010 - 2012 Co-chair, GFDL Formal Seminar Series (Fall 2010 - Summer 2012).
2011 Co-chair, ENSO: Dynamics, Predictability and Modelling, Session NP2.1/CL2.19, EGU General Assembly, Vienna, Austria.
2006 - 2011 Co-chair, GFDL Coupled Model Development Team (CMDT)
2002 - 2011 GFDL Coupled Model Development Team (CMDT)
2002 - 2011 GFDL Global Atmospheric Model Development Team (GAMDT)
2002 - 2011 GFDL Ocean Model Development Team (OMDT)
2010 Co-chair, New Strategies for Evaluating ENSO Processes in Climate Models, CLIVAR Workshop, Paris, France, 17-19 November 2010.
2010 Co-chair, ENSO: Dynamics, Predictability and Modelling, Session NP2.1/CL2.19, EGU General Assembly, Vienna, Austria.
2003 - 2009 US CLIVAR Working Group on Correcting Tropical Biases
2008 Co-chair, ENSO and Global Change: Past, Present, and Future, Session A11, AGU Fall Meeting, San Francisco.
2005 Review Panelist, NOAA Climate Variability and Predictability proposal review panel
2002 - 2005 Ocean Data Assimilation for Seasonal-to-Interannual Prediction (ODASI), a NOAA/CDEP consortium.

Journal Referee Proposal Referee Professional Societies
2002 - present American Geophysical Union

Advising

Postdoctoral Scientists
  • Malte Stuecker, University of Hawaii (8/2015, summer visitor to GFDL)
    Project: ENSO interactions with the southeast Asian monsoon Graduate Student Dissertation Committees Graduate Student Interns Undergraduates High School Students

    Teaching

    Guest Lecturer Laboratory Instructor

    Publications

    HighlyCited
    Thomson Reuters
    Highly Cited Researcher
    ResearchGate Google Scholar ORCID Scopus
    ResearcherID WebOfScience

         IN PRESS
    1. Krishnamurthy, L., G. A. Vecchi, R. Msadek, H. Murakami, A. Wittenberg, and F. Zeng, 2016: Impact of strong ENSO on regional tropical cyclone activity in a high-resolution climate model in the North Pacific and North Atlantic.  J. Climate, in press.  doi: 10.1175/JCLI-D-0468.1.
    2. Zhang, W., G. A. Vecchi, H. Murakami, T. Delworth, A. T. Wittenberg, A. Rosati, S. Underwood, W. Anderson, L. Harris, R. Gudgel, S.-J. Lin, G. Villarini, and J.-H. Chen, 2016: Improved simulation of tropical cyclone responses to ENSO in the western north Pacific in the high-resolution GFDL HiFLOR coupled climate model.  J. Climate, in press.  doi: 10.1175/JCLI-D-15-0475.1.
    3. Guilyardi, E., A. Wittenberg, M. Balmaseda, W. Cai, M. Collins, M. McPhaden, M. Watanabe, and S.-W. Yeh, 2016: ENSO in a changing climate: Meeting summary of the 4th CLIVAR workshop on the evaluation of ENSO processes in climate models.  Bull. Amer. Meteor. Soc., in press.  doi: 10.1175/BAMS-D-15-00287.1.

    4.    2015
    5. Erb, M. P., A. J. Broccoli, N. T. Graham, A. C. Clement, A. T. Wittenberg, and G. A. Vecchi, 2015: Response of the equatorial Pacific seasonal cycle to orbital forcing.  J. Climate, 28, 9258-9276.  doi: 10.1175/JCLI-D-15-0242.1.
    6. Graham, F. S., J. N. Brown, A. T. Wittenberg, and N. J. Holbrook, 2015: Reassessing conceptual models of ENSO.  J. Climate, 28, 9121-9142.  doi: 10.1175/JCLI-D-14-00812.1.
    7. Murakami, H., G. A. Vecchi, S. Underwood, T. L. Delworth, A. T. Wittenberg, W. G. Anderson, J.-H. Chen, R. G. Gudgel, L. M. Harris, S.-J. Lin, and F. Zeng, 2015: Simulation and prediction of category 4 and 5 hurricanes in the high-resolution GFDL HiFLOR coupled climate model.  J. Climate, 28, 9058-9079.  doi: 10.1175/JCLI-D-15-0216.1.
    8. Kam, J., T. R. Knutson, F. Zeng, and A. T. Wittenberg, 2015: Record annual mean warmth over Europe, the northeast Pacific, and the northwest Atlantic during 2014: Assessment of anthropogenic influence.  Section 13 of: "Explaining extreme events of 2014 from a climate perspective.Bull. Amer. Meteor. Soc., 96 (12), S61-S65.  doi: 10.1175/BAMS-EEE_2014_ch13.1.
    9. Choi, K.-Y., G. A. Vecchi, and A. T. Wittenberg, 2015: Nonlinear zonal wind response to ENSO in the CMIP5 models: Roles of the zonal and meridional shift of the ITCZ/SPCZ and the simulated climatological precipitation.  J. Climate, 28, 8556-8573.  doi: 10.1175/JCLI-D-15-0211.1.
    10. Capotondi, A., A. T. Wittenberg, et al., 2015: Understanding ENSO diversity.  Bull. Amer. Meteor. Soc., 96, 921-938.  doi: 10.1175/BAMS-D-13-00117.1.
    11. Krishnamurthy, L., G. Vecchi, R. Msadek, A. Wittenberg, T. Delworth, and F. Zeng, 2015: The seasonality of the Great Plains Low-Level Jet and ENSO relationship.  J. Climate, 28, 4525-4544.  doi: 10.1175/JCLI-D-14-00590.1.
    12. Delworth, T. L., F. Zeng, A. Rosati, G. Vecchi, and A. T. Wittenberg, 2015: A link between the hiatus in global warming and North American drought.  J. Climate, 28, 3834-3845.  doi: 10.1175/JCLI-D-14-00616.1
    13. Yang, X., G. A. Vecchi, R. G. Gudgel, T. L. Delworth, S. Zhang, A. Rosati, L. Jia, W. F. Stern, A. T. Wittenberg, S. Kapnick, R. Msadek, S. D. Underwood, F. Zeng, W. Anderson, and V. Balaji, 2015: Seasonal predictability of extratropical storm tracks in GFDL's high-resolution climate prediction model.  J. Climate, 28, 3592-3611.  doi: 10.1175/JCLI-D-14-00517.1.
    14. Jia, L., X. Yang, G. A. Vecchi, R. G. Gudgel, T. L. Delworth, A. Rosati, B. Stern, A. T. Wittenberg, et al., 2015: Improved seasonal prediction of temperature and precipitation over land in a high-resolution GFDL climate model.  J. Climate, 28, 2044-2062.  doi: 10.1175/JCLI-D-14-00112.1.
    15. *Wittenberg, A. T., 2015: Low-frequency variations of ENSO.  U.S. CLIVAR Variations, 13 (1), 26-31.
    16. *Capotondi, A., Y.-G. Ham, A. T. Wittenberg, and J.-S. Kug, 2015: Climate model biases and El Niño Southern Oscillation (ENSO) simulation.  U.S. CLIVAR Variations, 13 (1), 21-25.
    17. Griffies, S. M., M. Winton, W. G. Anderson, R. Benson, T. L. Delworth, C. O. Dufour, J. P. Dunne, P. Goddard, A. K. Morrison, A. Rosati, A. T. Wittenberg, J. Yin, and R. Zhang, 2015: Impacts on ocean heat from transient mesoscale eddies in a hierarchy of climate models.  J. Climate, 28, 952-977.  doi: 10.1175/JCLI-D-14-00353.1.

    18.    2014
    19. Lee, S.-K., P. N. DiNezio, E.-S. Chung, S.-W. Yeh, A. T. Wittenberg, and C. Wang, 2014: Spring persistence, transition and resurgence of El Niño.  Geophys. Res. Lett., 41 (23), 8578-8585.  doi: 10.1002/2014GL062484.
    20. Vecchi, G. A., T. Delworth, R. Gudgel, S. Kapnick, A. Rosati, A. T. Wittenberg, F. Zeng, et al., 2014: On the seasonal forecasting of regional tropical cyclone activity.  J. Climate, 27, 7994-8016.  doi: 10.1175/JCLI-D-14-00158.1.
    21. Graham, F. S., J. N. Brown, C. Langlais, S. J. Marsland, A. T. Wittenberg, and N. J. Holbrook, 2014: Effectiveness of the Bjerknes stability index in representing ocean dynamics.  Climate Dyn., 43, 2399-2414.  doi: 10.1007/s00382-014-2062-3.
    22. Knutson, T. R., F. Zeng, and A. T. Wittenberg, 2014b: Multimodel assessment of extreme annual-mean warm anomalies during 2013 over regions of Australia and the western tropical Pacific.  Section 8 of: "Explaining extreme events of 2013 from a climate perspective.Bull. Amer. Meteor. Soc., 95 (9), S26-S30.  doi: 10.1175/1520-0477-95.9.S1.1.
    23. Knutson, T. R., F. Zeng, and A. T. Wittenberg, 2014a: Seasonal and annual mean precipitation extremes occurring during 2013: A U.S. focused analysis.  Section 6 of: "Explaining extreme events of 2013 from a climate perspective.Bull. Amer. Meteor. Soc., 95 (9), S19-S23.  doi: 10.1175/1520-0477-95.9.S1.1.
    24. Christensen, J. H., K. Krishna Kumar, et al., 2014: Climate phenomena and their relevance for future regional climate change.  Chapter 14 of: Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Stocker, T.F., D. Qin, G.-K. Plattner, M. Tignor, S.K. Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex and P.M. Midgley (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, pp. 1217-1308. doi: 10.1017/CBO9781107415324.028.  ISBN: 9781107415324.
    25. Msadek, R., T. L. Delworth, A. Rosati, W. Anderson, G. Vecchi, Y.-S. Chang, K. Dixon, R. G. Gudgel, W. Stern, A. Wittenberg, X. Yang, F. Zeng, R. Zhang, and S. Zhang, 2014: Predicting a decadal shift in North Atlantic climate variability using the GFDL forecast system.  J. Climate, 27, 6472-6496.  doi: 10.1175/JCLI-D-13-00476.1.
    26. Wittenberg, A. T., A. Rosati, T. L. Delworth, G. A. Vecchi, and F. Zeng, 2014: ENSO modulation: Is it decadally predictable?  J. Climate, 27, 2667-2681.  doi: 10.1175/JCLI-D-13-00577.1.
    27. Vecchi, G. A., R. Msadek, W. Anderson, Y.-S. Chang, T. Delworth, K. Dixon, R. Gudgel, A. Rosati, W. Stern, G. Villarini, A. T. Wittenberg, X. Yang, F. Zeng, R. Zhang, and S. Zhang, 2014: Reply to comments on "Multiyear predictions of North Atlantic hurricane frequency: Promise and limitations."  J. Climate, 27, 490-492.  doi: 10.1175/JCLI-D-13-00381.1.
    28. Knutson, T. R., F. Zeng, A. Wittenberg, H.-S. Kim, J. Sirutis, M. Bender, M. Zhao, and R. Tuleya, 2014: Recent research at GFDL on surface temperature trends and simulations of tropical cyclone activity in the Indian Ocean region.  Pages 50-62 (Chapter 5) of Monitoring and Prediction of Tropical Cyclones in the Indian Ocean and Climate Change, U.C. Mohanty et al. (eds.), Springer, ISBN 978-94-007-7720-0.  doi: 10.1007/978-94-007-7720-0_5.
    29. Karamperidou, C., M. A. Cane, U. Lall, and A. T. Wittenberg, 2014: Intrinsic modulation of ENSO predictability viewed through a local Lyapunov lens.  Climate Dyn., 42, 253-270.  doi: 10.1007/s00382-013-1759-z.

    30.    2013
    31. Choi, K.-Y., G. A. Vecchi, and A. T. Wittenberg, 2013: ENSO transition, duration and amplitude asymmetries: Role of the nonlinear wind stress coupling in a conceptual model.   J. Climate, 26, 9462-9476.  doi: 10.1175/JCLI-D-13-00045.1.
    32. McGregor, S., A. Timmermann, M. H. England, O. Elison Timm, and A. T. Wittenberg, 2013: Inferred changes in El Niño-Southern Oscillation variance over the past six centuries.  Clim. Past, 9, 2269-2284.  doi: 10.5194/cp-9-2269-2013.
    33. Knutson, T. R., F. Zeng, and A. T. Wittenberg, 2013b: Multimodel assessment of regional surface temperature trends: CMIP3 and CMIP5 twentieth-century simulations.  J. Climate, 26, 8709-8743.  doi: 10.1175/JCLI-D-12-00567.1.
    34. Knutson, T. R., F. Zeng, and A. T. Wittenberg, 2013a: The extreme March-May 2012 warm anomaly over the eastern United States: Global context and multimodel trend analysis.  Section 5 of: "Explaining extreme events of 2012 from a climate perspective.Bull. Amer. Meteor. Soc., 94 (9), S13-S17. doi: 10.1175/BAMS-D-13-00085.1.
    35. Ogata, T., S.-P. Xie, A. Wittenberg, and D.-Z. Sun, 2013: Interdecadal amplitude modulation of El Niño/Southern Oscillation and its impacts on tropical Pacific decadal variability.  J. Climate, 26, 7280-7297.  doi: 10.1175/JCLI-D-12-00415.1.
    36. *Capotondi, A., and A. T. Wittenberg, 2013: ENSO diversity in climate models.  U.S. CLIVAR Variations, 11 (2), 10-14.
    37. *U.S. CLIVAR Project Office, 2013: U.S. CLIVAR ENSO Diversity Workshop Report.  Report 2013-1, U.S. CLIVAR Project Office, Washington, DC, 20006, 20pp.
    38. Vecchi, G. A., R. Msadek, W. Anderson, Y.-S. Chang, T. Delworth, K. Dixon, R. Gudgel, A. Rosati, W. Stern, G. Villarini, A. T. Wittenberg, X. Yang, F. Zeng, R. Zhang, and S. Zhang, 2013: Multiyear predictions of North Atlantic hurricane frequency: Promise and limitations.  J. Climate, 26, 5337-5357.  doi: 10.1175/JCLI-D-12-00464.1.
    39. Emile-Geay, J., K. Cobb, M. Mann, and A. T. Wittenberg, 2013b: Estimating central equatorial Pacific SST variability over the past millennium.  Part II: Reconstructions and implications.  J. Climate, 26, 2329-2352.  doi: 10.1175/JCLI-D-11-00511.1.
    40. Emile-Geay, J., K. Cobb, M. Mann, and A. T. Wittenberg, 2013a: Estimating central equatorial Pacific SST variability over the past millennium.  Part I: Methodology and validation.  J. Climate, 26, 2302-2328.  doi: 10.1175/JCLI-D-11-00510.1.
    41. Yang, X., A. Rosati, S. Zhang, T. L. Delworth, R. G. Gudgel, R. Zhang, G. Vecchi, W. Anderson, Y.-S. Chang, T. DelSole, K. Dixon, R. Msadek, W. F. Stern, A. Wittenberg, and F. Zeng, 2013: A predictable AMO-like pattern in GFDL's fully-coupled ensemble initialization and decadal forecasting system.  J. Climate, 26, 650-661.  doi: 10.1175/JCLI-D-12-00231.1.
    42. Dunne, J. P., J. G. John, E. Shevliakova, R. J. Stouffer, J. P. Krasting, S. L. Malyshev, P. C. D. Milly, L. T. Sentman, A. J. Adcroft, W. Cooke, K. A. Dunne, S. M. Griffies, R. W. Hallberg, M. J. Harrison, H. Levy, A. T. Wittenberg, P. J. Phillips, and N. Zadeh, 2013: GFDL's ESM2 global coupled climate-carbon Earth System Models, Part II: Carbon system formulation and baseline simulation characteristics.  J. Climate, 26, 2247-2267.  doi: 10.1175/JCLI-D-12-00150.1.

    43.    2012
    44. Dunne, J. P., J. G. John, A. J. Adcroft, S. M. Griffies, R. W. Hallberg, E. Shevliakova, R. J. Stouffer, W. Cooke, K. A. Dunne, M. J. Harrison, J. P. Krasting, S. L. Malyshev, P. C. D. Milly, P. J. Phillips, L. T. Sentman, B. L. Samuels, M. J. Spelman, M. Winton, A. T. Wittenberg, and N. Zadeh, 2012: GFDL's ESM2 global coupled climate-carbon Earth System Models, Part I: Physical formulation and baseline simulation characteristics.  J. Climate, 25, 6646-6665.  doi: 10.1175/JCLI-D-11-00560.1.
    45. Watanabe, M., J.-S. Kug, F.-F. Jin, M. Collins, M. Ohba, and A. T. Wittenberg, 2012: Uncertainty in the ENSO amplitude change from the past to the future.  Geophys. Res. Lett., 39, L20703.  doi: 10.1029/2012GL053305.
    46. Watanabe, M., and A. T. Wittenberg, 2012: A method for disentangling El Niño-mean state interaction.  Geophys. Res. Lett., 39, L14702.  doi: 10.1029/2012GL052013.
    47. DiNezio, P. N., B. P. Kirtman, A. C. Clement, S.-K. Lee, G. A. Vecchi, and A. Wittenberg, 2012: Mean climate controls on the simulated response of ENSO to increasing greenhouse gases.  J. Climate, 25, 7399-7420.  doi: 10.1175/JCLI-D-11-00494.1.
    48. Delworth, T. L., A. Rosati, W. Anderson, A. J. Adcroft, V. Balaji, R. Benson, K. Dixon, S. M. Griffies, H.-C. Lee, R. C. Pacanowski, G. A. Vecchi, A. T. Wittenberg, F. Zeng, and R. Zhang, 2012: Simulated climate and climate change in the GFDL CM2.5 high-resolution coupled climate model.  J. Climate, 25, 2755-2781.  doi: 10.1175/JCLI-D-11-00316.1.
    49. *Guilyardi, E., H. Bellenger, M. Collins, S. Ferrett, W. Cai, and A. Wittenberg, 2012: A first look at ENSO in CMIP5.  CLIVAR Exchanges, 17, 29-32.  ISSN: 1026-0471.
    50. Guilyardi, E., W. Cai, M. Collins, A. Fedorov, F.-F. Jin, A. Kumar, D.-Z. Sun, and A. Wittenberg, 2012: New strategies for evaluating ENSO processes in climate models.  Bull. Amer. Met. Soc., 93, 235-238.  doi: 10.1175/BAM S-D-11-00106.1.
    51. Richter, I., S.-P. Xie, A. T. Wittenberg, and Y. Masumoto, 2012: Tropical Atlantic biases and their relation to surface wind stress and terrestrial precipitation.  Climate Dyn., 38, 985-1001.  doi: 10.1007/s00382-011-1038-9.

    52.    2011
    53. Galbraith, E. D., E. Y. Kwon, A. Gnanadesikan, K. B. Rodgers, S. M. Griffies, D. Bianchi, J. L. Sarmiento, J. P. Dunne, J. Simeon, R. D. Slater, A. T. Wittenberg, and I. M. Held, 2011: Climate variability and radiocarbon in the CM2Mc Earth System Model.   J. Climate, 24, 4230-4254.  doi: 10.1175/2011JCLI3919.1.
    54. Griffies, S. M., et al., 2011: GFDL's CM3 coupled climate model: Characteristics of the ocean and sea ice simulations.  J. Climate, 24, 3520-3544.  doi: 10.1175/2011JCLI3964.1.
    55. Donner, L. J., et al., 2011: The dynamical core, physical parameterizations, and basic simulation characteristics of the atmospheric component AM3 of the GFDL global coupled model CM3J. Climate, 24, 3484-3519.  doi: 10.1175/2011JCLI3955.1.
    56. Chen, C.-K., C. Wang, K.-L. Ma, and A. Wittenberg, 2011: Static correlation visualization for large time-varying volume dataProceedings of the IEEE Pacific Visualization Symposium, Hong Kong, China, March 2011, 27-34.  doi: 10.1109/PACIFICVIS.2011.5742369.

    57.    2010
    58. Collins, M., S.-I. An, W. Cai, A. Ganachaud, E. Guilyardi, F.-F. Jin, M. Jochum, M. Lengaigne, S. Power, A. Timmermann, G. Vecchi, and A. Wittenberg, 2010: The impact of global warming on the tropical Pacific and El Niño.  Nature Geoscience, 3, 391-397. doi: 10.1038/ngeo868.
    59. Vecchi, G. A., and A. T. Wittenberg, 2010: El Niño and our future climate: Where do we stand?   Wiley Interdisciplinary Reviews: Climate Change, 1, 260-270.  doi: 10.1002/wcc.33.
    60. Kug, J.-S., J. Choi, S.-I. An, F.-F. Jin, and A. T. Wittenberg, 2010: Warm pool and cold tongue El Niño events as simulated by the GFDL CM2.1 coupled GCM.  J. Climate, 23, 1226-1239.  doi: 10.1175/2009JCLI3293.1.
    61. Xie, S.-P., C. Deser, G. A. Vecchi, J. Ma, H. Teng, and A. T. Wittenberg, 2010: Global warming pattern formation: Sea surface temperature and rainfall.  J. Climate, 23, 966-986.  doi: 10.1175/2009JCLI3329.1.

    62.    2009
    63. Stenchikov, G, T. L. Delworth, V. Ramaswamy, R. J. Stouffer, A. Wittenberg, and F. Zeng, 2009: Volcanic signals in oceans.  J. Geophys. Res., 114, D16104.  doi: 10.1029/2008JD011673.
    64. Wittenberg, A. T., 2009: Are historical records sufficient to constrain ENSO simulations?  Geophys. Res. Lett., 36, L12702.  doi: 10.1029/2009GL038710.
      • trophy  Highly Cited Paper (top 1%) on Web of Science
      • trophy  GFDL Outstanding Scientific Paper Award (2011)
    65. Anderson, W., A. Gnanadesikan, and A. Wittenberg, 2009: Regional impacts of ocean color on tropical Pacific variability.  Ocean Sci., 5, 313-327.  doi: 10.5194/os-5-313-2009.
    66. Guilyardi, E., A. Wittenberg, A. Fedorov, M. Collins, C. Wang, A. Capotondi, G. J. van Oldenborgh, and T. Stockdale, 2009: Understanding El Niño in ocean-atmosphere general circulation models: Progress and challenges.  Bull. Amer. Meteor. Soc., 90, 325-340.  doi: 10.1175/2008BAMS2387.1.
    67. Sukharev, J., C. Wang, K.-L. Ma, and A. T. Wittenberg, 2009: Correlation study of time-varying multivariate climate data sets.   Proc. of IEEE VGTC Pacific Visualization Symposium 2009, Beijing, China, April 2009, pages 161-168.  doi: 10.1109/PACIFICVIS.2009.4906852.

    68.    2008
    69. Zavala-Garay, J., C. Zhang, A. M. Moore, A. T. Wittenberg, M. J. Harrison, A. Rosati, J. Vialard, and R. Kleeman, 2008: Sensitivity of hybrid ENSO models to unresolved atmospheric variability.  J. Climate, 21, 3704-3721.  doi: 10.1175/2007JCLI1188.1.
    70. 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., 31, 213-226.  doi: 10.1007/s00382-007-0348-4.

    71.    2007
    72. *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. (Nowcast), 88 (9), 1356-1357.
    73. 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. doi: 10.1175/JAS4029.1.
    74. 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.  doi: 10.1175/MWR3466.1.
      • trophy  NOAA Outstanding Scientific Paper Award (2008)
    75. 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.  doi: 10.1175/MWR3405.1.

    76.    2006
    77. 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, 441, 73-76.  doi: 10.1038/nature04744.
    78. 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.  doi: 10.1016/j.ocemod.2006.02.004.
    79. 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.  doi: 10.1175/JCLI3631.1.
    80. Gnanadesikan, A., et al., 2006: GFDL's CM2 global coupled climate models, Part II: The baseline ocean simulation.  J. Climate, 19, 675-697.  doi: 10.1175/JCLI3630.1.
    81. Delworth, T. L., et al., 2006: GFDL's CM2 global coupled climate models, Part I: Formulation and simulation characteristics.  J. Climate, 19, 643-674.  doi: 10.1175/JCLI3629.1.
    82. 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.

    83.    2005
    84. 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. doi: 10.1175/MWR3024.1

    85.    2004
    86. 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.  doi: 10.1175/JCLI-3223.1.
    87. Wittenberg, A. T., 2004: Extended wind stress analyses for ENSO.  J. Climate, 17, 2526-2540.  doi: 10.1175/1520-0442(2004)017%3C2526:EWSAFE%3E2.0.CO;2 .
    88. 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.  doi: 10.1111/j.1600-0870.2004.00040.x.

    89.    2003 & earlier
    90. Fedorov, A. V. , S. L. Harper, S. G. Philander, B. Winter, and A. Wittenberg, 2003: How predictable is El Niño?  Bull. Amer. Meteor. Soc., 84, 911-919.  doi: 10.1175/BAMS-84-7-911.
    91. *Wittenberg, A. T., 2002: ENSO response to altered climates.  Ph.D. thesis, Princeton University. 475pp.  doi: 10.13140/RG.2.1.1777.8403.
    92. 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.  doi: 10.5194/npg-5-167-1998.
    93. Hartmann, W. M., and A. Wittenberg, 1996: On the externalization of sound images.  J. Acoust. Soc. Am., 99, 3678-3688.  doi: 10.1121/1.414965.

    Works Submitted

    1. Lee, S.-K., A. T. Wittenberg, D. B. Enfield, S. J. Weaver, C. Wang, and R. M. Atlas, 2016: U.S. regional tornado outbreaks and their links to spring ENSO phases and North Atlantic SST variability.  Subm. to Environ. Res. Lett., January 2016.
    2. Graham, F. S., J. N. Brown, A. T. Wittenberg, S. J. Marsland, and N. J. Holbrook, 2015: The double peaked El Niño.  Revised for Climate Dyn., Nov 2015.
    3. Chen, C., M. A. Cane, A. T. Wittenberg, and D. Chen, 2015: Empirical probabilistic diagnostics for ENSO behaviors.  Subm. to J. Climate, Dec 2015.

    Works In Preparation

    1. Wittenberg, A. T., G. A. Vecchi, T. L. Delworth, A. Rosati, W. Anderson, K. Dixon, F. Zeng, and S. Ray, 2015: Tropical Pacific climate and ENSO in GFDL's global models: Impacts of horizontal resolution and flux adjustment.
    2. Atwood, A. R., D. S. Battisti, A. T. Wittenberg, W. G. H. Roberts, and D. J. Vimont, 2015: Characterizing unforced multi-decadal ENSO variability: A case study with GFDL CM2.1.
    3. Predybaylo, E., G. Stenchikov, A. T. Wittenberg, and F. Zeng, 2015: Interaction of volcanic forcing and El Niño: Sensitivity to El Niño intensity and type.

    Talks

    1. Wittenberg, A. T., 2015: ENSO in GFDL's next-generation global models.  ENSO in a Changing Climate: 4th CLIVAR Workshop on Evaluating ENSO Processes in Climate Models.  Paris, France, 9 July 2015.  Also in OpenOffice and PDF.
    2. Wittenberg, A. T., 2015: Tropical Pacific climatological biases in the FLOR coupled model.  First Project Meeting, "Understanding tropical Pacific biases in climate simulations and initialized predictions," A joint GFDL/CPC project funded by NOAA CPO, Princeton, NJ, 14 May 2015.
    3. Wittenberg, A. T., 2014: ENSO dynamics, diversity, and change.  III International Conference on ENSO, Guayaquil, Ecuador, 12 November 2014.  Also in OpenOffice and PDF.
    4. Wittenberg, A. T., 2014: Predictions and the NMME.  Overview for Dr. Richard Spinrad (NOAA Chief Scientist), NOAA/GFDL, Princeton, NJ, 27 August 2014.
    5. Wittenberg, A. T., 2014: ENSO predictability and dynamics.  GFDL External Review, NOAA/GFDL, Princeton, NJ, 21 May 2014.
    6. Chen, C., M. Cane., and A. Wittenberg, 2013: Predictability of El Niño flavors in GFDL coupled GCM simulations.  NOAA/GFDL, Princeton, NJ, 28 August 2013.
    7. Wittenberg, A. T., 2013: Regional climate, extremes, and impacts.  GFDL Science Symposium, NOAA/GFDL, Princeton, NJ, 20 May 2013.
    8. Wittenberg, A. T., 2013: Assessing ENSO risks for the coming decades.  NOAA/GFDL, Princeton, NJ, 20 March 2013.
    9. Wittenberg, A. T., J.-S. Kug, J. Choi, S.-I. An, and F.-F. Jin, 2013: ENSO diversity in the GFDL CM2.1 coupled GCM.  U.S. CLIVAR ENSO Diversity Workshop, Boulder, CO, 6 February 2013.
    10. Wittenberg, A. T., 2012: Variation in ENSO teleconnections.  AGU Fall Meeting, San Francisco, CA, 7 December 2012.
    11. Wittenberg, A. T., 2012: Tropical climate change and ENSO.  Princeton University Carbon Mitigation Initiative, including the chief Scientist of BP, Professor Ellen Williams.  NOAA/GFDL, Princeton, NJ, 18 September 2012.
    12. Wittenberg, A. T., 2012: ENSO diversity in the GFDL CM2.1 coupled GCM.  US CLIVAR Working Group on ENSO Diversity.  Webinar broadcast from NOAA/GFDL, Princeton, NJ, 16 May 2012.
    13. Wittenberg, A. T., 2012: Tropical climate variability & change in the GFDL coupled GCMs.  Workshop on Decadal-to-Centennial Tropical Pacific Climate Variability: Perspectives from Proxies and Multi-Century Model Simulations.  Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, 2 February 2012.
    14. Wittenberg, A. T., 2011: Tropical climate change and ENSO.  GFDL Climate Modeling and Research Symposium, NOAA/GFDL, Princeton, NJ, 17 October 2011.
    15. Wittenberg, A. T., 2011: GFDL's Climate Change, Variability and Prediction Group.  GFDL New User Training, NOAA/GFDL, Princeton, NJ, 5 October 2011.
    16. Wittenberg, A. T., 2011: Whither ENSO?  Assessing ENSO risks for the coming decades.
      • NASA Goddard Space Flight Center, Greenbelt, MD, 17 May 2011.
      • Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, 3 February 2012.
      • Dept. of Earth & Environmental Science, University of Pennsylvania, Philadelphia, PA, 15 November 2012.
    17. Wittenberg, A. T., 2010: Model fidelity and ENSO change: Signal versus noise.  New strategies for evaluating ENSO processes in climate models, CLIVAR workshop, Paris, France, 17 November 2010.  (Alternative PDF format here.)
    18. Wittenberg, A. T., 2010: Tropical climate, variability, and change in the GFDL global coupled GCMs.  Coral Vulnerability Workshop, Princeton University, Princeton, NJ, 30 August 2010.
    19. Wittenberg, A. T., 2010: Predictability of extreme ENSO epochs in the CM2.1 global coupled GCM.  15th Annual Ocean Sciences Meeting, Portland, OR, 26 February 2010.
    20. Wittenberg, A. T., T. Rosati, S. Zhang, et al., 2009: Seasonal to decadal predictability.  Roundtable on Applying Models of Global Climate Change to Natural Resources Management, NOAA/GFDL, Princeton, NJ, 17 August 2009.
    21. Wittenberg, A. T., 2009: Climate change and ENSO.  GFDL External Review, NOAA/GFDL, Princeton, NJ, 1 July 2009.
    22. Wittenberg, A. T., 2009: CM3: Tropical climate and ENSO.  GFDL-NCAR Atmospheric GCM Meeting, NOAA/GFDL, Princeton, NJ, 27 April 2009.
    23. Wittenberg, A. T., W. Anderson, A. Gnanadesikan, A. Capotondi, and G. Vecchi, 2009: Understanding & simulating El Niño: Lessons from the GFDL coupled GCMs.
      • Bureau of Meteorology (CAWCR), Melbourne, Australia, 31 March 2009.
      • CSIRO Marine Laboratories, Hobart, Tasmania, 3 April 2009.
    24. Wittenberg, A. T., 2009: CO2-induced changes in tropical climate, as simulated by the GFDL coupled GCMs.  International ENSO Workshop, Greenhouse 2009, Perth, Australia, 26 March 2009. See also page 31 of the workshop report.
    25. Wittenberg, A. T., 2008: Understanding ENSO modulation in the GFDL CM2.1 coupled GCM.  AGU Fall Meeting, San Francisco, CA, 15 December 2008.
    26. Wittenberg, A. T., 2008: Natural and forced modulation of ENSO in the GFDL CM2.1 coupled GCM.  Department of Atmospheric & Oceanic Science, University of Maryland, College Park, MD, 2 October 2008.
    27. Wittenberg, A. T., 2008: Natural modulation of ENSO in the GFDL CM2.1 coupled GCM.
      • EGU General Assembly, Vienna, Austria, 15 April 2008.
      • 13th Annual CCSM Workshop, Breckenridge, CO, 19 June 2008.
    28. 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.
    29. 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.
    30. 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.
    31. Wittenberg, A. T., and A. Rosati, 2006: What controls the period and amplitude of ENSO?  11th Annual CCSM Workshop, Breckenridge, CO, 20 June 2006.
    32. 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.
    33. 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.
    34. Vecchi, G., Q. Song, A. Wittenberg, and M. Harrison, 2006: Coupled Indian Ocean intraseasonal variability.  AGU Joint Assembly, Baltimore, MD, 25 May 2006.
    35. Wittenberg, A. T., 2006: Simulated CO2-induced changes in tropical climate and variability.  NOAA/GFDL, Princeton, NJ, 22 March 2006.
    36. Eisenman, I., E. Tziperman, J. Gebbie, L. Yu, and A. Wittenberg, 2005: Feedbacks between El Niño and the "noise" that drives it: Modulation of westerly wind bursts by large-scale SST.  Boston University, 17 October 2005.
    37. 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.
    38. 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.
    39. Wittenberg, A. T., 2005: On extended wind stress analyses for ENSO.   Stony Brook University, Stony Brook, New York, 2 February 2005. Also in PowerPoint.
    40. 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/GFDL, Princeton, NJ, 21 January 2005. Also in PowerPoint.
    41. Wittenberg, A. T., and G. A. Vecchi, 2004: Reassessing the role of stochastic forcing in ENSO events.
      • Harvard University, Cambridge, MA, 16 November 2004.
      • Lamont-Doherty Earth Observatory, Palisades, NY, 3 December 2004.
    42. 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.
    43. 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.
    44. Wittenberg, A. T., and A. Rosati, 2004: Tropical Pacific Climate & ENSO in the GFDL CM2/2.1 control simulations.  NOAA/GFDL, Princeton, NJ, 19 August 2004.  See also the CM2 handout and the CM2.1 handout.
    45. 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.
    46. Wittenberg, A. T., and E. Galanti, 2004: Assessing the impact of stochastic forcing on ENSO events.  2004 Joint Assembly, Montreal, Canada, 19 May 2004.
    47. 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.
    48. Wittenberg, A. T., T. Rosati, and I. Held, 2003: ENSO in the GFDL coupled model.  8th Annual CCSM Workshop, Breckenridge, CO, 24 June 2003.
    49. 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.
    50. Wittenberg, A. T., 2002: ENSO response to altered climates. NOAA/GFDL, Princeton, NJ, 2 May 2002.
    51. Wittenberg, A. T., 2002: Understanding the sensitivity of ENSO to the tropical climatology.  International Research Institute for Climate Prediction, Palisades, NY, 11 January 2002.
    52. Wittenberg, A. T., 2000: The modulation of El Niño by climate change.  Department of Geoscience Annual Retreat, Killington, VT, January 2000.
    53. Wittenberg, A. T., 1999: The dynamics of El Niño.  Department of Geoscience Annual Retreat, Killington, VT, January 1999.
    54. Wittenberg, A. T., 1997: Dynamical implications of forcing a model with a prescribed boundary.  Atmospheric & Oceanic Sciences General Seminar, Princeton University, 17 October 1997.
    55. 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. Wittenberg, A. T., 2015: Assessing ENSO risks for the coming decades.  El Niño 2015 International Summit, International Research Institute, Palisades, NY, 16 November 2015.
    2. Wittenberg, A. T., G. A. Vecchi, T. L. Delworth, A. Rosati, W. G Anderson, and F. Zeng, 2014: Impacts of horizontal resolution on the tropical Pacific climatology in GFDL's CM2.x models.   Session A43G-3368, AGU Fall Meeting, San Francisco, CA, 18 December 2014.  AbstractID: 17645.
    3. Wittenberg, A. T., G. A. Vecchi, T. L. Delworth, A. Rosati, and W. G Anderson, 2014: ENSO changes with increasing resolution in the GFDL models.   2014 Ocean Sciences Meeting, Honolulu, HI, 26 February 2014.  AbstractID: 13302. See also the ePoster.
    4. McGregor, S., A. Timmermann, M. H. England, O. Elison Timm, and A. T. Wittenberg, 2014: Inferred changes in El Niño Southern Oscillation variance over the past six centuries.  2014 Ocean Sciences Meeting, Honolulu, HI, 26 February 2014.  AbstractID: 13255.
    5. Ogata, T., S.-P. Xie, A. Wittenberg, and D.-Z. Sun, 2014: Interdecadal amplitude modulation of El Niño/Southern Oscillation and its impacts on tropical Pacific decadal variability.  2014 Ocean Sciences Meeting, Honolulu, HI, 26 February 2014.  AbstractID: 13463.
    6. Graham, F. S., J. N. Brown, A. T. Wittenberg, N. J. Holbrook, and S. J. Marsland, 2014: Implications of coupled model biases for ENSO ocean dynamics and climate projections.  2014 Ocean Sciences Meeting, Honolulu, HI, 26 February 2014.  AbstractID: 15374.
    7. Chen, C., M. A. Cane, A. T. Wittenberg, D. Chen, and N. Henderson, 2014: Evolutionary characteristics and predictability of ENSO diversity.  2014 Ocean Sciences Meeting, Honolulu, HI, 26 February 2014.  AbstractID: 17869.
    8. Choi, K.-Y., G. A. Vecchi, and A. T. Wittenberg, 2014: Roles of wind and precipitation nonlinearities in ENSO asymmetries.  2014 Ocean Sciences Meeting, Honolulu, HI, 26 February 2014.  AbstractID: 14365.
    9. Chen, C., M. Cane, D. Chen, N. Henderson, and A. T. Wittenberg, 2013: Diagnosing the dynamics of ENSO flavors using linear inverse models.  19th Conference on Atmospheric and Oceanic Fluid Dynamics, Newport, RI, 17 June 2013.
    10. Wittenberg, A. T., 2013: Variation of ENSO teleconnections.  U.S. CLIVAR ENSO Diversity Workshop, Boulder, CO, 7 February 2013.
    11. Guilyardi, E., H. Bellenger, P. Braconnot, M. Collins, S. Ferett, J. Leloup, W. Cai, A. Wittenberg, S.-W. Yeh, and Y.-G. Ham, 2012: A first look at ENSO in CMIP5.   WCRP Workshop on CMIP5 Model Analysis, University of Hawaii, Honolulu, HI, 5-9 March 2012.
    12. Graham, F. S., J. N. Brown, A. Wittenberg, and N. J. Holbrook, 2012: Application of the ENSO unified oscillator theory to an ocean-only model.  Poster 15-05, AMOS 18th National Conference, University of New South Wales, Sydney, Australia, 1 February 2012.  Awarded the conference prize for best student poster.
    13. Wittenberg, A. T., 2011: Assessing ENSO risks for the coming decades.  WCRP Open Science Conference, Session C36, poster Th25A, Denver, CO, 27 October 2011.
    14. C. Karamperidou, M. Cane, A. T. Wittenberg, and U. Lall, 2011: ENSO's decadal dance viewed through a local Lyapunov lens.  WCRP Open Science Conference, Session C25, Denver, CO, 27 October 2011.
    15. Guilyardi, E., A. Wittenberg, and the ENSO Metrics Working Group of the CLIVAR Pacific Panel, 2010: ENSO and tropical Pacific metrics for CMIP5.
      • IPCC Expert Meeting on Assessing and Combining Multi Model Climate Projections, NCAR, Boulder, CO, 25-27 January 2010.
      • EGU General Assembly, Vienna, Austria, 4 May 2010
    16. 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.
    17. Wittenberg, A. T., 2007: Addressing tropical biases in GFDL's global coupled climate models.
      • Third WGNE Workshop on Systematic Errors in Climate and NWP Models, San Francisco, CA, 14 February 2007.
      • 12th Annual CCSM Workshop, Breckenridge, CO, 19-21 June 2007.
    18. Wittenberg, A. T., G. A. Vecchi, and A. Rosati, 2006: Simulated CO2-induced changes in tropical climate and variability.
      • 13th Ocean Sciences Meeting, Honolulu, HI, 22 February 2006.
      • 11th Annual CCSM Workshop, Breckenridge, CO, 20-22 June 2006.
    19. 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.
    20. 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.
    21. Wittenberg, A. T., and A. Rosati, 2004: Tropical Pacific climate & variability in the GFDL CM2 global coupled GCM.
      • First International CLIVAR Science Conference, Baltimore, MD, 21-25 June 2004.
      • 9th Annual CCSM Workshop, Santa Fe, NM, 7-9 July 2004.
    22. Wittenberg, A. T., and A. Rosati, 2004: Sensitivities of ENSO: Lessons from the GFDL CM2 global coupled GCM.
      • First International CLIVAR Science Conference, Baltimore, MD, 21-25 June 2004.
      • 9th Annual CCSM Workshop, Santa Fe, NM, 7-9 July 2004.
    23. 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.
    24. 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.
    25. Wittenberg, A. T., 2002: What is the wind stress over the tropical Pacific?  AGU Fall Meeting, San Francisco, CA, 10 December 2002.
    26. Wittenberg, A. T., 1999: Modulation of ENSO by changes in tropical climate.  Eighth Conference on Climate Variations, Denver, CO, 15 September 1999.

    Other Activities

    2000 - present Frequent contributor to Ferret analysis software, and its 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 OSU Science Student Council (Physics Representative)
    1993 - 1995 Software engineer and language tutor, English Language Institute, OSU 
    1995 Mentor, 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

    Research keywords:

    Personal Interests: parenting, cycling, running, hiking, skiing, genealogy, juggling, ballroom dancing

    Last updated: 24 November 2015