Articles | Volume 16, issue 6
https://doi.org/10.5194/os-16-1559-2020
https://doi.org/10.5194/os-16-1559-2020
Research article
 | 
18 Dec 2020
Research article |  | 18 Dec 2020

Variability and stability of anthropogenic CO2 in Antarctic Bottom Water observed in the Indian sector of the Southern Ocean, 1978–2018

Léo Mahieu, Claire Lo Monaco, Nicolas Metzl, Jonathan Fin, and Claude Mignon

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Short summary
We investigated the evolution of anthropogenic CO2 (Cant) in the Antarctic Bottom Water in the southern Indian Ocean since 1978 based on observations from 16 reocupations. We found that the Cant and dissolved inorganic carbon increased at about the same rate over the 40-year period. However, the data also show large interannual variations and a surprising stability of Cant in the last decade, likely reflecting the variability of bottom water formation and circulation in the Southern Ocean.