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  Carbon-concentration and carbon-climate feedbacks in CMIP6 models and their comparison to CMIP5 models

Arora, V. K., Katavouta, A., Williams, R. G., Jones, C. D., Brovkin, V., Friedlingstein, P., et al. (2020). Carbon-concentration and carbon-climate feedbacks in CMIP6 models and their comparison to CMIP5 models. Biogeosciences, 17, 4173-4222. doi:10.5194/bg-17-4173-2020.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-FEB0-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-37C1-1
Genre: Journal Article

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Data Set NOAA-GFDL GFDL-ESM4 model output prepared for CMIP6 C4MIP
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Data Study NOAA-GFDL GFDL-ESM4 model output prepared for CMIP6 CMIP

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 Creators:
Arora, Vivek K.1, Author
Katavouta, Anna1, Author
Williams, Richard G.1, Author
Jones, Chris D.1, Author
Brovkin, Victor2, Author              
Friedlingstein, Pierre1, Author
Schwinger, Jorg1, Author
Bopp, Laurent1, Author
Boucher, Olivier1, Author
Cadule, Patricia1, Author
Chamberlain, Matthew A.1, Author
Christian, James R.1, Author
Delire, Christine1, Author
Fisher, Rosie A.1, Author
Hajima, Tomohiro1, Author
Ilyina, Tatiana3, Author              
Joetzjer, Emilie1, Author
Kawamiya, Michio1, Author
Koven, Charles D.1, Author
Krasting, John P.1, Author
Law, Rachel M.1, AuthorLawrence, David M.1, AuthorLenton, Andrew1, AuthorLindsay, Keith1, AuthorPongratz, Julia4, Author              Raddatz, Thomas5, Author              Seferian, Roland1, AuthorTachiiri, Kaoru1, AuthorTjiputra, Jerry F.1, AuthorWiltshire, Andy1, AuthorWu, Tongwen1, AuthorZiehn, Tilo1, Author more..
Affiliations:
1external, ou_persistent22              
2Climate-Biogeosphere Interaction, The Land in the Earth System, MPI for Meteorology, Max Planck Society, ou_913566              
3Ocean Biogeochemistry, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society, ou_913556              
4Emmy Noether Junior Research Group Forest Management in the Earth System, The Land in the Earth System, MPI for Meteorology, Max Planck Society, ou_1832286              
5Global Vegetation Modelling, The Land in the Earth System, MPI for Meteorology, Max Planck Society, ou_913562              

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Free keywords: EARTH SYSTEM MODEL; SEA-ICE MODEL; AUSTRALIAN COMMUNITY CLIMATE; OCEAN BIOGEOCHEMICAL MODEL; CONVECTIVE BOUNDARY-LAYER; CO2 ENRICHMENT FACE; CYCLE FEEDBACKS; ATMOSPHERIC CO2; PART I; SIMULATOR ACCESS-ESM1Environmental Sciences & Ecology; Geology;
 Abstract: Results from the fully and biogeochemically coupled simulations in which CO2 increases at a rate of 1 % yr(-1) (1pctCO2) from its preindustrial value are analyzed to quantify the magnitude of carbon-concentration and carbon-climate feedback parameters which measure the response of ocean and terrestrial carbon pools to changes in atmospheric CO2 concentration and the resulting change in global climate, respectively. The results are based on 11 comprehensive Earth system models from the most recent sixth) Coupled Model Intercomparison Project (CMIP6) and compared with eight models from the fifth CMIP (CMIP5). The strength of the carbon-concentration feedback is of comparable magnitudes over land (mean +/- standard deviation = 0.97 +/- 0.40 PgC ppm(-1)) and ocean (0.79 +/- 0.07 PgC ppm(-1)), while the carbon-climate feedback over land (-45.1 +/- 50.6 PgC degrees C-1) is about 3 times larger than over ocean (-17.2 +/- 5.0 PgC degrees C-1). The strength of both feedbacks is an order of magnitude more uncertain over land than over ocean as has been seen in existing studies. These values and their spread from 11 CMIP6 models have not changed significantly compared to CMIP5 models. The absolute values of feedback parameters are lower for land with models that include a representation of nitrogen cycle. The transient climate response to cumulative emissions (TCRE) from the 11 CMIP6 models considered here is 1.77 +/- 0.37 degrees C EgC(-1) and is similar to that found in CMIP5 models (1.63 +/- 0.48 degrees C EgC(-1)) but with somewhat reduced model spread. The expressions for feedback parameters based on the fully and biogeochemically coupled configurations of the 1pctCO2 simulation are simplified when the small temperature change in the biogeochemically coupled simulation is ignored. Decomposition of the terms of these simplified expressions for the feedback parameters is used to gain insight into the reasons for differing responses among ocean and land carbon cycle models.

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Language(s): eng - English
 Dates: 2019-122020-05-182020-08-182020-08-17
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: ISI: 000562977000002
DOI: 10.5194/bg-17-4173-2020
 Degree: -

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Project name : CRESCENDO
Grant ID : 641816
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)
Project name : 4C
Grant ID : 821003
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)
Project name : CONSTRAIN
Grant ID : . 82082
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

Source 1

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Title: Biogeosciences
  Other : Biogeosciences
Source Genre: Journal
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Publ. Info: Katlenburg-Lindau, Germany : Copernicus GmbH on behalf of the European Geosciences Union
Pages: - Volume / Issue: 17 Sequence Number: - Start / End Page: 4173 - 4222 Identifier: ISSN: 1726-4170
CoNE: https://pure.mpg.de/cone/journals/resource/111087929276006