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| 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. |
| 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... |
| Tipo: Text |
Palavras-chave: Carbon dioxide; Ocean carbon sink; Terrestrial carbon sink; Climate variability; Carbon budget. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00675/78728/80983.pdf |
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| Rosso, Isabella; Mazloff, Matthew R.; Verdy, Ariane; Talley, Lynne D.. |
| The upper ocean dissolved inorganic carbon (DIC) concentration is regulated by advective and diffusive transport divergence, biological processes, freshwater, and air-sea CO2 fluxes. The relative importance of these mechanisms in the Southern Ocean is uncertain, as year-round observations in this area have been limited. We use a novel physical-biogeochemical state estimate of the Southern Ocean to construct a closed DIC budget of the top 650 m and investigate the spatial and temporal variability of the different components of the carbon system. The dominant mechanisms of variability in upper ocean DIC depend on location and time and space scales considered. Advective transport is the most influential mechanism and governs the local DIC budget across the 10... |
| Tipo: Text |
Palavras-chave: Carbon budget; Southern Ocean; State estimate. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00662/77395/78996.pdf |
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