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Stephen E. Zebiak

Birth and early life

Cannot verify. Public sources do not give a birth year, place, or family details for Stephen Emil Zebiak. None of his Columbia, IRI, Climate Information Services, CCAFS, ResearchGate, Climate Services Partnership, or AMS Fellow biographies discloses such information. He has a substantially lower public profile than his thesis advisor.

Education

  • Undergraduate institution: not stated in any of the five biographical pages I checked (IRI Staff Directory, CCAFS profile, Climate Information Services Ltd. staff page, Columbia SPS, and Earth Institute archive). Multiple targeted searches across Harvard, MIT, Cornell, Cooper Union, and Carleton turned up nothing.
  • Ph.D., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences. Two dates appear in primary records:
    • The thesis itself in DSpace@MIT is catalogued with Date issued: 1985, “Thesis (Ph.D.)—Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1985.”
    • The Mark Cane CV (2015 PDF) under “Ph.D. Theses; Massachusetts Institute of Technology” lists “Zebiak, Stephen 1985: Tropical atmosphere-ocean interaction and the El Niño/Southern Oscillation phenomenon”.
    • Several IRI / CCAFS / Climate Information Services biographies state he completed the PhD in 1984, e.g. CCAFS: “Zebiak has worked in the area of ocean-atmosphere interaction and climate variability since completing his PhD at the Massachusetts Institute of Technology in 1984.”
    • The likely reconciliation: defended late 1984, degree formally issued in 1985. The MIT thesis record is the primary source — 1985.
  • Thesis title: Tropical atmosphere-ocean interaction and the El Niño/Southern Oscillation Phenomenon (DSpace@MIT 1721.1/15271). 234 pages. Bibliography on leaves 230–234.
  • Advisor: Mark Cane (the thesis was Cane’s first PhD student at MIT — see Cane CV under “Ph.D Theses; Massachusetts Institute of Technology”, where Zebiak is the first name listed; the only earlier thesis Cane supervised at MIT was a 1984 master’s, Haim Nelkin).

The 1986 Nature paper as PhD thesis work

Yes, this is verified. The Cane–Zebiak intermediate-complexity coupled model that produced the first dynamical El Niño forecast was Zebiak’s MIT PhD thesis project. The 1985 Science paper (Cane and Zebiak, “A Theory for El Niño and the Southern Oscillation,” Science 228:1085–1087) and the 1986 Nature paper (Cane, Zebiak and Dolan, “Experimental forecasts of El Niño,” Nature 322:827–832) both predate the formal model description, which appeared as Zebiak and Cane, “A Model El Niño–Southern Oscillation,” Monthly Weather Review 115(10):2262–2278 (1987) (AMS Journals). The 1987 paper is the canonical reference for the Zebiak–Cane (or “Cane–Zebiak”) coupled model.

Model architecture as described in the 1987 paper: a diagnostic atmosphere model, a prognostic ocean dynamics (shallow water) model with linearised baroclinic mode, and a prognostic mixed-layer SST model. Standard time step ~10 days; ocean dynamics grid 2° longitude × 0.5° latitude; SST and atmosphere grid 5.625° longitude × 2° latitude.

Career trajectory

  • 1985–~2003: Lamont-Doherty Earth Observatory. Joined as a research scientist after his PhD; appears as Cane’s most frequent collaborator across the 1980s and 1990s in both their CVs.
  • 1996: Co-founder / early staff of IRI at Lamont (Cane led the establishment in 1996; Zebiak was integral; State of the Planet 25-year retrospective, 30 Sept 2022 treats Zebiak as a co-founder).
  • 2003–2012: Director-General, International Research Institute for Climate and Society. Led an interdisciplinary team of 40+ scientists; oversaw an annual budget of more than $12 million and a staff of 60+ (CIS staff page).
  • 2012–2015: Director, Climate Services Partnership international secretariat. Convened annual International Conferences on Climate Services (CIS staff page).
  • 2017–18: Global Coordinator, Climate Services for Resilient Development Partnership — international public-private partnership (CCAFS profile).
  • From July 2019: Flagship Leader for Climate Services and Safety Nets, CCAFS (CCAFS).
  • Currently: Founder & President, Climate Information Services, Ltd. (Palisades, NY) (CIS site); Special Research Scientist at IRI / Columbia (IRI staff page); editorial board, Climate Services (Elsevier).
  • IRI 25th anniversary remarks (Sept 2022): Zebiak is quoted at the event, suggesting he was still active in IRI’s orbit then (State of the Planet 2022).

Selected later papers

From Zebiak’s Google Scholar profile and his CIS bio:

  • McPhaden, M.J., S.E. Zebiak, M.H. Glantz, 2006: ENSO as an integrating concept in earth science. Science, 314(5806):1740–1745. (2,385 citations)
  • Neelin, J.D., D.S. Battisti, A.C. Hirst, F.-F. Jin, Y. Wakata, T. Yamagata, S.E. Zebiak, 1998: ENSO theory. J. Geophys. Res. Oceans, 103(C7):14261–14290.
  • Goddard, L., S.J. Mason, S.E. Zebiak, C.F. Ropelewski, R. Basher, M.A. Cane, 2001: Current approaches to seasonal to interannual climate predictions. Int. J. Climatol., 21:1111–1152.
  • Chen, D., S.E. Zebiak, A.J. Busalacchi, M.A. Cane, 1995: An improved procedure for El Niño forecasting: Implications for predictability. Science, 269(5231):1699–1702.
  • Thomson, M.C., S.J. Connor, S.E. Zebiak, M. Jancloes, A. Mihretie, 2011: Africa needs climate data to fight disease. Nature, 471:440–442.
  • Trenberth, K.E., M. Marquis, S.E. Zebiak, 2016: The vital need for a climate information system. Nature Climate Change, 6:1057–1059.

Citation totals as of late 2024–2026 (from his Google Scholar profile, fetched April 2026): 23,999 total citations, h-index 58, i10-index 102. The 1987 Monthly Weather Review paper alone has 2,552 citations.

Awards and honours

  • Fellow, American Meteorological Society (year unstated in available sources).
  • His Climate Information Services biography says: “He has chaired, or served on numerous international advisory groups, programs, and working groups; and served as editor or associate editor of multiple professional journals.” (CIS)

I could not find a Sverdrup, Ewing, AGU Fellow, or NAS membership for Zebiak in publicly available sources.

Current status (2026)

  • Alive. Founder and Director, Climate Information Services, Ltd. (telephone +1 (845) 664 2550; email steve@climinfosvcs.com) per CIS.
  • Continues as Special Research Scientist at IRI / Columbia (IRI directory).

Things I could not verify

  • Birth date, birthplace, family.
  • Undergraduate institution and field.
  • Specific honours beyond AMS Fellowship.
  • Year of AMS Fellowship.
  • Whether he played any role in the 1991-92 forecast versus the 1992-93 missed forecast, separately from Cane.

Direct quote suitable for blockquote

From the 25-year IRI retrospective (State of the Planet, 30 Sept 2022): “This approach of going into it from a problem and a use perspective, and then figuring out where we can inject the right scientific information that can help this part and that part — that’s the agenda. I think the roadmap that the IRI gives to the world is exactly what it needs to address the more complex challenges of the future.” — Stephen Zebiak.