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Recent reduced abyssal overturning and ventilation in the Australian Antarctic Basin - Nature Climate Change

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Recent reduced abyssal overturning and ventilation in the Australian Antarctic Basin - Nature Climate Change

Dense water formed near Antarctica, known as Antarctic bottom water (AABW), drives deep ocean circulation and supplies oxygen to the abyssal ocean. Observations show that AABW has freshened and contracted since the 1960s, yet the drivers of these changes and their impact remain uncertain. Here, using observations from the Australian Antarctic Basin, we show that AABW transport reduced by 4.0 Sv between 1994 and 2009, during a period of strong freshening on the continental shelf.

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Recent reduced abyssal overturning and ventilation in the Australian Antarctic Basin - Nature Climate Change

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Recent reduced abyssal overturning and ventilation in the Australian Antarctic Basin - Nature Climate Change

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