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  Evaluating CMIP5 ocean biogeochemistry and Southern Ocean carbon uptake using atmospheric potential oxygen: Present-day performance and future projection

Nevison, C., Manizza, M., Keeling, R., Stephens, B., Bent, J., Dunne, J., et al. (2016). Evaluating CMIP5 ocean biogeochemistry and Southern Ocean carbon uptake using atmospheric potential oxygen: Present-day performance and future projection. Geophysical Research Letters, 43, 2077-2085. doi:10.1002/2015GL067584.

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Nevison_et_al-2016-Geophysical_Research_Letters.pdf (Publisher version), 675KB
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Nevison_et_al-2016-Geophysical_Research_Letters.pdf
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 Creators:
Nevison, C.D.1, Author
Manizza, M.1, Author
Keeling, R.F.1, Author
Stephens, B.B.1, Author
Bent, J.D.1, Author
Dunne, J.1, Author
Ilyina, T.2, Author           
Long, M.1, Author
Resplandy, L.1, Author
Tjiputra, J.1, Author
Yukimoto, S.1, Author
Affiliations:
1external, ou_persistent22              
2Ocean Biogeochemistry, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society, ou_913556              

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Free keywords: Air-sea fluxes, APO, Carbon cycle, CMIP5 models, Ocean carbon sink, Southern Ocean carbon cycle
 Abstract: Observed seasonal cycles in atmospheric potential oxygen (APO~O2+1.1 CO2) were used to evaluate eight ocean biogeochemistry models from the Coupled Model Intercomparison Project (CMIP5). Model APO seasonal cycles were computed from the CMIP5 air-sea O2 and CO2 fluxes and compared to observations at three Southern Hemisphere monitoring sites. Four of the models captured either the observed APO seasonal amplitude or phasing relatively well, while the other four did not. Many models had an unrealistic seasonal phasing or amplitude of the CO2 flux, which in turn influenced APO. By 2100 under RCP8.5, the models projected little change in the O2 component of APO but large changes in the seasonality of the CO2 component associated with ocean acidification. The models with poorer performance on present-day APO tended to project larger net carbon uptake in the Southern Ocean, both today and in 2100. ©2016. American Geophysical Union.

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Language(s): eng - English
 Dates: 2016-03-052016-03-05
 Publication Status: Issued
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 Table of Contents: -
 Rev. Type: Peer
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Project name : CRESCENDO
Grant ID : 641816
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

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Title: Geophysical Research Letters
Source Genre: Journal
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Pages: - Volume / Issue: 43 Sequence Number: - Start / End Page: 2077 - 2085 Identifier: -