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Abstract
This study investigates the intensification of the atmospheric water cycle in the Indian sector of the Southern Ocean between 1993 and 2021 using salinity and seawater oxygen isotope observations. Results show an increase in salinity in subtropical surface waters (0.06 ± 0.07 g kg⁻¹ per decade) and a decrease in salinity in subpolar surface waters (-0.02 ± 0.01 g kg⁻¹ per decade). Oxygen isotope data reveals that subpolar freshening is primarily driven by increased net precipitation (doubling), while decreased sea ice melt is balanced by glacial meltwater. These findings support the growing evidence for an accelerated hydrological cycle and melting cryosphere due to global warming.
Publisher
Nature Communications
Published On
May 13, 2023
Authors
Camille Hayatte Akhoudas, Jean-Baptiste Sallée, Gilles Reverdin, F. Alexander Haumann, Etienne Pauthenet, Christopher C. Chapman, Félix Margirier, Claire Lo Monaco, Nicolas Metzl, Julie Meilland, Christian Stranne
Tags
atmospheric water cycle
Southern Ocean
salinity
oxygen isotopes
global warming
precipitation
sea ice

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