Climate Sensitivity of GFDL's CM4.0

Winton, M.; Adcroft, A.; Dunne, J. P.; Held, I. M.; Shevliakova, E.; Zhao, M.; Guo, H.; Hurlin, W.; Krasting, J.; Knutson, T.; Paynter, D.; Silvers, L. G.; Zhang, R.

doi:10.1029/2019ms001838

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i

Climate Sensitivity of GFDL's CM4.0

2020
By Winton, M. ; Adcroft, A. ; Dunne, J. P. ; ...
Source: Journal of Advances in Modeling Earth Systems, 12(1)

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Journal Title:

Journal of Advances in Modeling Earth Systems
Personal Author:

Winton, M. ; Adcroft, A. ; Dunne, J. P. ; Held, I. M. ; Shevliakova, E. ; ... More +

Winton, M. ; Adcroft, A. ; Dunne, J. P. ; Held, I. M. ; Shevliakova, E. ; Zhao, M. ; Guo, H. ; Hurlin, W. ; Krasting, J. ; Knutson, T. ; Paynter, D. ; Silvers, L. G. ; Zhang, R. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CIMES (Cooperative Institute for Modeling the Earth System) ; GFDL (Geophysical Fluid Dynamics Laboratory)

OAR (Oceanic and Atmospheric Research) ; CIMES (Cooperative Institute for Modeling the Earth System) ; GFDL (Geophysical Fluid Dynamics Laboratory) Less -
Description:

GFDL's new CM4.0 climate model has high transient and equilibrium climate sensitivities near the middle of the upper half of CMIP5 models. The CMIP5 models have been criticized for excessive sensitivity based on observations of present‐day warming and heat uptake and estimates of radiative forcing. An ensemble of historical simulations with CM4.0 produces warming and heat uptake that are consistent with these observations under forcing that is at the middle of the assessed distribution. Energy budget‐based methods for estimating sensitivities based on these quantities underestimate CM4.0's sensitivities when applied to its historical simulations. However, we argue using a simple attribution procedure that CM4.0's warming evolution indicates excessive transient sensitivity to greenhouse gases. This excessive sensitivity is offset prior to recent decades by excessive response to aerosol and land use changes.
Source:

Journal of Advances in Modeling Earth Systems, 12(1)
DOI:

https://doi.org/10.1029/2019ms001838
ISSN:

1942-2466;1942-2466;
Format:

pdf
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
Funding:

Grant no. NA18OAR4320123
License:

https://creativecommons.org/licenses/by/4.0/
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CC BY
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Library
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urn:sha-512:4ecfb8d48ad8708fda4353fc375d7fc71fbda8ce07d1e3d149bbfd99cf40bd189a2daed63e350e772210df176e77dcc83fd7a1954ab8f491a831a1ce4b5ccea2
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Climate Sensitivity of GFDL's CM4.0

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