Data/hora: 07/06/2024 00:43:56

Provedor de dados: | 5
País: | France
Título: | Decadal trends in the ocean carbon sink
Autores: | Devries, Tim; Le Quere, Corinne; Andrews, Oliver; Berthet, Sarah; Hauck, Judith; Ilyina, Tatiana; Landschuetzer, Peter; Lenton, Andrew; Lima, Ivan D.; Nowicki, Michael; Schwinger, Jorg; Seferian, Roland.
Data: | 2019-06
Ano: | 2019
Palavras-chave: | Carbon dioxide; Ocean carbon sink; Terrestrial carbon sink; Climate variability; Carbon budget.
Resumo: | Measurements show large decadal variability in the rate of CO2 accumulation in the atmosphere that is not driven by CO2 emissions. The decade of the 1990s experienced enhanced carbon accumulation in the atmosphere relative to emissions, while in the 2000s, the atmospheric growth rate slowed, even though emissions grew rapidly. These variations are driven by natural sources and sinks of CO2 due to the ocean and the terrestrial biosphere. In this study, we compare three independent methods for estimating oceanic CO2 uptake and find that the ocean carbon sink could be responsible for up to 40% of the observed decadal variability in atmospheric CO2 accumulation. Data-based estimates of the ocean carbon sink from pCO(2) mapping methods and decadal ocean inverse models generally agree on the magnitude and sign of decadal variability in the ocean CO2 sink at both global and regional scales. Simulations with ocean biogeochemical models confirm that climate variability drove the observed decadal trends in ocean CO2 uptake, but also demonstrate that the sensitivity of ocean CO2 uptake to climate variability may be too weak in models. Furthermore, all estimates point toward coherent decadal variability in the oceanic and terrestrial CO2 sinks, and this variability is not well-matched by current global vegetation models. Reconciling these differences will help to constrain the sensitivity of oceanic and terrestrial CO2 uptake to climate variability and lead to improved climate projections and decadal climate predictions.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00675/78728/80983.pdf

https://archimer.ifremer.fr/doc/00675/78728/80984.pdf

DOI:10.1073/pnas.1900371116

https://archimer.ifremer.fr/doc/00675/78728/

Editor: | Natl Acad Sciences
Relação: | info:eu-repo/grantAgreement/EC/FP7/641816/EU//CRESCENDO
Formato: | application/pdf
Fonte: | Proceedings Of The National Academy Of Sciences Of The United States Of America (0027-8424) (Natl Acad Sciences), 2019-06 , Vol. 116 , N. 24 , P. 11646-11651

Fonte:

info:eu-repo/semantics/openAccess

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