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Antarctic Peninsula warm winters influenced by Tasman Sea temperatures

Author

Listed:
  • Kazutoshi Sato

    (Kitami Institute of Technology
    Japan Agency for Marine-Earth Science and Technology)

  • Jun Inoue

    (Japan Agency for Marine-Earth Science and Technology
    National Institute of Polar Research
    The Graduate University for Advanced Studies, SOKENDAI)

  • Ian Simmonds

    (The University of Melbourne)

  • Irina Rudeva

    (The University of Melbourne
    Australian Bureau of Meteorology)

Abstract

The Antarctic Peninsula of West Antarctica was one of the most rapidly warming regions on the Earth during the second half of the 20th century. Changes in the atmospheric circulation associated with remote tropical climate variabilities have been considered as leading drivers of the change in surface conditions in the region. However, the impacts of climate variabilities over the mid-latitudes of the Southern Hemisphere on this Antarctic warming have yet to be quantified. Here, through observation analysis and model experiments, we reveal that increases in winter sea surface temperature (SST) in the Tasman Sea modify Southern Ocean storm tracks. This, in turn, induces warming over the Antarctic Peninsula via planetary waves triggered in the Tasman Sea. We show that atmospheric response to SST warming over the Tasman Sea, even in the absence of anomalous tropical SST forcing, deepens the Amundsen Sea Low, leading to warm advection over the Antarctic Peninsula.

Suggested Citation

  • Kazutoshi Sato & Jun Inoue & Ian Simmonds & Irina Rudeva, 2021. "Antarctic Peninsula warm winters influenced by Tasman Sea temperatures," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-21773-5
    DOI: 10.1038/s41467-021-21773-5
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