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Publication Abstracts

Mitevski et al. 2022

Mitevski, I., L. Polvani, and C. Orbe, 2022: Asymmetric warming/cooling response to CO2 increase/decrease due to non-logarithmic forcing, not feedbacks. Geophys. Res. Lett., 49, no. 5, e2021GL097133, doi:10.1029/2021GL097133.

We explore the CO2 dependence of effective climate sensitivity (SG) with symmetric abrupt and transient CO2 forcing, spanning the range 1/8×, 1/4×, 1/2×, 2×, 4×, and 8×CO2, using two state-of-the-art fully coupled atmosphere-ocean-sea-ice-land models. In both models, under abrupt CO2 forcing, we find an asymmetric response in surface temperature and SG. The surface global warming at 8×CO2 is more than one third larger than the corresponding cooling at 1/8×CO2, and SG is CO2 dependent, increasing non-monotonically from 1/8×CO2 to 8×CO2. We find similar CO2 dependence in the transient runs, forced with -1%yr-1CO2 and +1%yr-1CO2 up to 1/8×CO2 and 8×CO2, respectively. The non-logarithmic radiative forcing — not the changing feedbacks — primarily explains the dependence of SG on CO2. The changing feedbacks, however, explain SG's non-monotonic

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BibTeX Citation

@article{mi00620a,
  author={Mitevski, I. and Polvani, L. and Orbe, C.},
  title={Asymmetric warming/cooling response to CO2 increase/decrease due to non-logarithmic forcing, not feedbacks},
  year={2022},
  journal={Geophysical Research Letters},
  volume={49},
  number={5},
  pages={e2021GL097133},
  doi={10.1029/2021GL097133},
}

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RIS Citation

TY  - JOUR
ID  - mi00620a
AU  - Mitevski, I.
AU  - Polvani, L.
AU  - Orbe, C.
PY  - 2022
TI  - Asymmetric warming/cooling response to CO2 increase/decrease due to non-logarithmic forcing, not feedbacks
JA  - Geophys. Res. Lett.
JO  - Geophysical Research Letters
VL  - 49
IS  - 5
SP  - e2021GL097133
DO  - 10.1029/2021GL097133
ER  -

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