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Increased productivity in the subantarctic ocean during Heinrich events

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  • Julian P. Sachs

    (Massachusetts Institute of Technology)

  • Robert F. Anderson

    (Lamont-Doherty Earth Observatory of Colombia University)

Abstract

Atlantic climate Massive discharges of ice to the North Atlantic Ocean plunged the region into harsh cold and windy conditions eight times during the last ice age. These cold snaps, or ‘Heinrich events’, had a great impact on climate and circulation of the North Atlantic Ocean, but their influence beyond that region remains uncertain. Now an analysis of molecular tracers of algal growth and sedimentation shows that each event coincided with soaring growth of plankton in the distant Southern Ocean around Antarctica. Knowledge of how the Southern Ocean responded to these perturbations contributes to our understanding of the role of the ocean in climate change.

Suggested Citation

  • Julian P. Sachs & Robert F. Anderson, 2005. "Increased productivity in the subantarctic ocean during Heinrich events," Nature, Nature, vol. 434(7037), pages 1118-1121, April.
    • Handle: RePEc:nat:nature:v:434:y:2005:i:7037:d:10.1038_nature03544
    DOI: 10.1038/nature03544
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