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Empirically Constrained Climate Sensitivity And The Social Cost Of Carbon

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  • KEVIN DAYARATNA

    (Heritage Foundation Washington, DC, USA)

  • ROSS McKITRICK

    (Department of Economics, University of Guelph and Fraser Institute, Vancouver BC, Canada)

  • DAVID KREUTZER

    (US Environmental Protection Agency Washington, DC, USA)

Abstract

Integrated Assessment Models (IAMs) require parameterization of both economic and climatic processes. The latter includes Equilibrium Climate Sensitivity (ECS), or the temperature response to doubling CO2 levels, and Ocean Heat Uptake (OHU) efficiency. ECS distributions in IAMs have been drawn from climate model runs that lack an empirical basis, and in Monte Carlo experiments may not be constrained to consistent OHU values. Empirical ECS estimates are now available, but have not yet been applied in IAMs. We incorporate a new estimate of the ECS distribution conditioned on observed OHU efficiency into two widely used IAMs. The resulting Social Cost of Carbon (SCC) estimates are much lower than those from models based on simulated ECS parameters. In the DICE model, the average SCC falls by approximately 40–50% depending on the discount rate, while in the FUND model the average SCC falls by over 80%. The span of estimates across discount rates also shrinks substantially.

Suggested Citation

  • KEVIN DAYARATNA & ROSS McKITRICK & DAVID KREUTZER, 2017. "Empirically Constrained Climate Sensitivity And The Social Cost Of Carbon," Climate Change Economics (CCE), World Scientific Publishing Co. Pte. Ltd., vol. 8(02), pages 1-12, May.
    • Handle: RePEc:wsi:ccexxx:v:08:y:2017:i:02:n:s2010007817500063
    DOI: 10.1142/S2010007817500063
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    Cited by:

    1. Kevin D. Dayaratna & Ross McKitrick & Patrick J. Michaels, 2020. "Climate sensitivity, agricultural productivity and the social cost of carbon in FUND," Environmental Economics and Policy Studies, Springer;Society for Environmental Economics and Policy Studies - SEEPS, vol. 22(3), pages 433-448, July.
    2. G. Cornelis van Kooten & Mark E. Eiswerth & Jonathon Izett & Alyssa R. Russell, 2021. "Climate Change and the Social Cost of Carbon: DICE Explained and Expanded," Working Papers 2021-01, University of Victoria, Department of Economics, Resource Economics and Policy Analysis Research Group.
    3. Jin, Gui & Shi, Xin & Zhang, Lei & Hu, Shougeng, 2020. "Measuring the SCCs of different Chinese regions under future scenarios," Renewable and Sustainable Energy Reviews, Elsevier, vol. 130(C).
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    5. McKitrick, Ross & Lee, Jamie, 2017. "Forming a Majority Coalition for Carbon Taxes under a State-Contingent Updating Rule," Strategic Behavior and the Environment, now publishers, vol. 6(4), pages 289-309, November.
    6. G. Cornelis van Kooten, 2016. "California Dreaming: The Economics of Renewable Energy," Working Papers 2016-05, University of Victoria, Department of Economics, Resource Economics and Policy Analysis Research Group.
    7. Richard S.J. Tol, 2021. "Estimates of the social cost of carbon have not changed over time," Working Paper Series 0821, Department of Economics, University of Sussex Business School.
    8. Tol, Richard S.J., 2017. "The structure of the climate debate," Energy Policy, Elsevier, vol. 104(C), pages 431-438.
    9. van Kooten, G. Cornelis, 2017. "The Policy Challenge of Creating Forest Offset Credits: A Case Study from the Interior of British Columbia," Working Papers 253887, University of Victoria, Resource Economics and Policy.
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    11. Wei, Taoyuan & Aaheim, Hans Asbjørn, 2021. "Economic damage of climate change: How far is it from the physical damage?," Conference papers 333256, Purdue University, Center for Global Trade Analysis, Global Trade Analysis Project.
    12. Richard S. J. Tol, 2021. "Estimates of the social cost of carbon have increased over time," Papers 2105.03656, arXiv.org, revised Aug 2022.

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    More about this item

    Keywords

    Social cost of carbon; climate sensitivity; ocean heat uptake; carbon taxes; integrated assessment models;
    All these keywords.

    JEL classification:

    • Q54 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Climate; Natural Disasters and their Management; Global Warming
    • Q58 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environmental Economics: Government Policy
    • H23 - Public Economics - - Taxation, Subsidies, and Revenue - - - Externalities; Redistributive Effects; Environmental Taxes and Subsidies

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