Climate sensitivity from both physical and carbon cycle feedbacks
Climate sensitivity from both physical and carbon cycle feedbacks
The surface warming response to anthropogenic forcing is highly sensitive to the strength of feedbacks in both the physical climate and carbon-cycle systems. However, the definitions of climate feedback, λClimate in Wm-2K-1, and climate sensitivity, SClimate in K[Wm-2]-1, explicitly exclude the impact of carbon-cycle feedbacks. Here, we provide a new framework to incorporate carbon feedback into the definitions of climate feedback and sensitivity. Applying our framework to the Global Carbon Budget reconstructions reveals a present-day terrestrial carbon feedback of λCarbon=0.31±0.09 Wm-2K-1 and an ocean carbon feedback of -0.06 to 0.015 Wm-2K-1 in Earth system models. Observational constraints reveal a combined climate and carbon feedback of λClimate+Carbon=1.48 Wm-2K-1 with a 95% range of 0.76 to 2.32 Wm-2K-1 on centennial timescales, corresponding to a combined climate and carbon sensitivity of SClimate+Carbon=0.67 K[Wm-2]-1 with a 95% range of 0.43 to 1.32 K[Wm-2]-1.
7554-7564
Goodwin, Philip
87dbb154-5c39-473a-8121-c794487ee1fd
Williams, Richard
0a2caaf1-7b2b-4154-9f3b-09fbf0b8cdeb
Roussenov, Vassil
68649eb4-aad2-4637-b6d0-ffcbf42e88d2
Katavouta, Anna
1feff1b6-ad1f-4620-a628-de2d08fc7a50
16 July 2019
Goodwin, Philip
87dbb154-5c39-473a-8121-c794487ee1fd
Williams, Richard
0a2caaf1-7b2b-4154-9f3b-09fbf0b8cdeb
Roussenov, Vassil
68649eb4-aad2-4637-b6d0-ffcbf42e88d2
Katavouta, Anna
1feff1b6-ad1f-4620-a628-de2d08fc7a50
Goodwin, Philip, Williams, Richard, Roussenov, Vassil and Katavouta, Anna
(2019)
Climate sensitivity from both physical and carbon cycle feedbacks.
Geophysical Research Letters, 46 (13), .
(doi:10.1029/2019GL082887).
Abstract
The surface warming response to anthropogenic forcing is highly sensitive to the strength of feedbacks in both the physical climate and carbon-cycle systems. However, the definitions of climate feedback, λClimate in Wm-2K-1, and climate sensitivity, SClimate in K[Wm-2]-1, explicitly exclude the impact of carbon-cycle feedbacks. Here, we provide a new framework to incorporate carbon feedback into the definitions of climate feedback and sensitivity. Applying our framework to the Global Carbon Budget reconstructions reveals a present-day terrestrial carbon feedback of λCarbon=0.31±0.09 Wm-2K-1 and an ocean carbon feedback of -0.06 to 0.015 Wm-2K-1 in Earth system models. Observational constraints reveal a combined climate and carbon feedback of λClimate+Carbon=1.48 Wm-2K-1 with a 95% range of 0.76 to 2.32 Wm-2K-1 on centennial timescales, corresponding to a combined climate and carbon sensitivity of SClimate+Carbon=0.67 K[Wm-2]-1 with a 95% range of 0.43 to 1.32 K[Wm-2]-1.
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Goodwin et al 2019 Geophysical Research Letters
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Accepted/In Press date: 12 June 2019
e-pub ahead of print date: 22 June 2019
Published date: 16 July 2019
Identifiers
Local EPrints ID: 431840
URI: http://eprints.soton.ac.uk/id/eprint/431840
ISSN: 0094-8276
PURE UUID: 5dc38bf8-9489-47df-b80d-2e824fbe0b6b
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Date deposited: 19 Jun 2019 16:30
Last modified: 16 Mar 2024 07:56
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Author:
Richard Williams
Author:
Vassil Roussenov
Author:
Anna Katavouta
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