Oxygen at Bottom of the World (IMAGE)

Columbia Climate School

Oxygen at Bottom of the World

Caption

Researchers have found that bottom waters of the Southern Ocean had very low levels of oxygen during the last ice age, indicating high uptake of carbon. Here, dissolved Southern Ocean bottom-water oxygen in modern times. Brighter colors indicate more oxygen; dots show sites where researchers sampled sediments to measure past oxygen levels.

Credit

Jaccard et al., <i>Nature</i> 2016

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