Climatic Change

, Volume 142, Issue 3–4, pp 407–418

Cold- and heat-related mortality: a cautionary note on current damage functions with net benefits from climate change


DOI: 10.1007/s10584-017-1956-6

Cite this article as:
Huber, V., Ibarreta, D. & Frieler, K. Climatic Change (2017) 142: 407. doi:10.1007/s10584-017-1956-6


Several economic assessments of climate change build on the assumption that reductions of cold-related mortality will overcompensate increases in heat-related mortality at least for moderate levels of global warming. Due to the lack of suitable epidemiological studies with sufficient spatial coverage, many of these assessments rely on one particular dataset: projections of temperature-related mortality in 17 countries published almost 20 years ago. Here, we reanalyse this dataset with a focus on cardiovascular mortality and present evidence for two flaws in the original analysis, which would imply a significant bias towards finding net mortality benefits from climate change: (i) the combination of mortality data for all ages with data specific to the elderly and (ii) the confounding of seasonal effects with direct temperature effects on mortality. This bias appears to be further amplified in the integrated assessment models FUND and ENVISAGE, and related economic assessment tools relying on the same calibration scheme, because heat-related cardiovascular mortality is assumed to affect urban populations only in these models. In an exemplary calculation, we show that while FUND currently projects a net reduction of approximately 380,000 deaths from cardiovascular diseases globally per year at 1 °C of global warming, correcting for the two potential flaws and assuming equal vulnerability of urban and rural populations would result in a net increase of cardiovascular mortality, with approximately 150,000 net additional deaths globally per year. Our findings point to the urgent need of renewing damage functions on temperature-related mortality currently applied in some of the most widely used integrated assessment models.

Supplementary material

10584_2017_1956_MOESM1_ESM.pdf (993 kb)
Online Resource 1(PDF 993 kb)
10584_2017_1956_MOESM2_ESM.pdf (362 kb)
Online Resource 2(PDF 362 kb)

Funding information

Funder NameGrant NumberFunding Note
German Federal Ministry of Education and Research
  • 01LS1201A1

Copyright information

© Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  • Veronika Huber
    • 1
  • Dolores Ibarreta
    • 2
  • Katja Frieler
    • 1
  1. 1.Potsdam Institute for Climate Impact ResearchPotsdamGermany
  2. 2.European Commission - Joint Research Center, Edificio EXPOSevillaSpain

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