The Conversation Weekly

How early climate models got global warming right

Nov 13, 2025
Nadir Jeevanjee, a physical scientist at NOAA's Geophysical Fluid Dynamics Laboratory, shares insights on the history of climate models. He highlights Syukuro Manabe's groundbreaking work and his 1967 predictions about CO2-induced warming. Jeevanjee explains how early models accurately forecasted phenomena like polar amplification and stratospheric cooling. He also discusses the alarming threats to climate data collection due to recent funding cuts, emphasizing the importance of these foundational models in today's climate science and discussions.
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ANECDOTE

Manabe's Personal Dedication

  • Sukuro (Suki) Manabe moved from post-war Japan to work at GFDL and remained actively engaged into his 80s and 90s.
  • Nadir Jeevanjee describes Manabe's energetic seminar questions and tireless publication record as defining traits.
INSIGHT

Vertical Radiation Drives Climate Response

  • Manabe built one-dimensional radiative-transfer models to represent vertical energy flow and greenhouse gas effects.
  • Those simple column calculations let him capture how gases like CO2, water vapor, and ozone control stratospheric temperatures.
INSIGHT

Early Estimate Matches Modern Results

  • Manabe's 1967 model estimated surface warming of about 2–3°C per CO2 doubling using convective adjustment and radiation physics.
  • Those numbers and assumptions have held up under modern re-evaluation with updated physics.
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