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Atlantic multi-decadal oscillation covaries with Agulhas leakage

Author

Listed:
  • Arne Biastoch

    (GEOMAR Helmholtz Centre for Ocean Research Kiel)

  • Jonathan V. Durgadoo

    (GEOMAR Helmholtz Centre for Ocean Research Kiel)

  • Adele K. Morrison

    (Atmospheric and Oceanic Sciences Program, Princeton University)

  • Erik van Sebille

    (Climate Change Research Centre & ARC Centre of Excellence for Climate System Science, University of New South Wales
    Imperial College London)

  • Wilbert Weijer

    (Los Alamos National Laboratory)

  • Stephen M. Griffies

    (NOAA Geophysical Fluid Dynamics Lab)

Abstract

The interoceanic transfer of seawater between the Indian Ocean and the Atlantic, ‘Agulhas leakage’, forms a choke point for the overturning circulation in the global ocean. Here, by combining output from a series of high-resolution ocean and climate models with in situ and satellite observations, we construct a time series of Agulhas leakage for the period 1870–2014. The time series demonstrates the impact of Southern Hemisphere westerlies on decadal timescales. Agulhas leakage shows a correlation with the Atlantic Multi-decadal Oscillation on multi-decadal timescales; the former leading by 15 years. This is relevant for climate in the North Atlantic.

Suggested Citation

  • Arne Biastoch & Jonathan V. Durgadoo & Adele K. Morrison & Erik van Sebille & Wilbert Weijer & Stephen M. Griffies, 2015. "Atlantic multi-decadal oscillation covaries with Agulhas leakage," Nature Communications, Nature, vol. 6(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms10082
    DOI: 10.1038/ncomms10082
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