Publication Abstracts

Mitevski et al. 2021

Mitevski, I., C. Orbe, R. Chemke, L. Nazarenko, and L.M. Polvani, 2021: Non-monotonic response of the climate system to abrupt CO2 forcing. Geophys. Res. Lett., 48, no. 6, e2020GL090861, doi:10.1029/2020GL090861.

We here explore the state-dependence of the response of climate system to abrupt CO2 forcing, spanning the range 1.5-to-8×CO2 with the coupled atmosphere-ocean NASA Goddard Institute for Space Studies (GISS) Model E2.1. We find that the equilibrium climate sensitivity increases non-monotonically with CO2, reaching a minimum at 3×CO2. A similar non-monotonic response is found in Northern Hemisphere surface temperature, sea-ice, precipitation, the latitude of zero precipitation-minus-evaporation, and the strength of the Hadley cell. Interestingly, the Atlantic meridional overturning circulation collapses at 3×CO2 and does not recover for larger CO2 forcings. Analyzing the climate response over the same CO2 range with a slab-ocean version of the same model, we demonstrate that the non-monotonic response of the climate system stems from changes in ocean heat transport.

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BibTeX Citation

  author={Mitevski, I. and Orbe, C. and Chemke, R. and Nazarenko, L. and Polvani, L. M.},
  title={Non-monotonic response of the climate system to abrupt CO2 forcing},
  journal={Geophys. Res. Lett.},

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RIS Citation

ID  - mi08520y
AU  - Mitevski, I.
AU  - Orbe, C.
AU  - Chemke, R.
AU  - Nazarenko, L.
AU  - Polvani, L. M.
PY  - 2021
TI  - Non-monotonic response of the climate system to abrupt CO2 forcing
JA  - Geophys. Res. Lett.
VL  - 48
IS  - 6
SP  - e2020GL090861
DO  - 10.1029/2020GL090861
ER  -

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