Energy budget diagnosis of changing climate feedback

Cael, BB, Bloch-Johnson, Jonah, Ceppi, Paulo, Fredriksen, Hege-Beate, Goodwin, Philip, Gregory, Jonathan M, Smith, Christopher J and Williams, Richard G ORCID: 0000-0002-3180-7558 (2023) Energy budget diagnosis of changing climate feedback. SCIENCE ADVANCES, 9 (16). eadf9302-.

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Official URL: http://dx.doi.org/10.1126/sciadv.adf9302

Abstract

The climate feedback determines how Earth's climate responds to anthropogenic forcing. It is thought to have been more negative in recent decades due to a sea surface temperature "pattern effect," whereby warming is concentrated in the western tropical Pacific, where nonlocal radiative feedbacks are very negative. This phenomenon has however primarily been studied within climate models. We diagnose a pattern effect from historical records as an evolution of the climate feedback over the past five decades. Our analysis assumes a constant rate of change of the climate feedback, which is justified post hoc. We find a decrease in climate feedback by 0.8 ± 0.5 W m<sup>-2</sup> K<sup>-1</sup> over the past 50 years, corresponding to a reduction in climate sensitivity. Earth system models' climate feedbacks instead increase over this period. Understanding and simulating this historical trend and its future evolution are critical for reliable climate projections.

Item Type:	Article
Uncontrolled Keywords:	13 Climate Action
Divisions:	Faculty of Science and Engineering > School of Environmental Sciences
Depositing User:	Symplectic Admin
Date Deposited:	06 Jul 2023 08:15
Last Modified:	15 Mar 2024 09:22
DOI:	10.1126/sciadv.adf9302
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3171441