Articles | Volume 16, issue 6
Ocean Sci., 16, 1559–1576, 2020
https://doi.org/10.5194/os-16-1559-2020
Ocean Sci., 16, 1559–1576, 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 et al.

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AR by Léo Mahieu on behalf of the Authors (03 Sep 2020)  Author's response    Manuscript
ED: Publish subject to minor revisions (review by editor) (11 Sep 2020) by Mario Hoppema
AR by Léo Mahieu on behalf of the Authors (21 Sep 2020)  Author's response    Manuscript
ED: Publish as is (29 Sep 2020) by Mario Hoppema
AR by Léo Mahieu on behalf of the Authors (02 Oct 2020)  Author's response    Manuscript
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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.