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Sunlight-driven nitrate loss records Antarctic surface mass balance

Author

Listed:
  • Pete D. Akers

    (Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE
    Trinity College Dublin)

  • Joël Savarino

    (Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE)

  • Nicolas Caillon

    (Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE)

  • Aymeric P. M. Servettaz

    (Japan Agency for Marine-Earth Science and Technology)

  • Emmanuel Meur

    (Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE)

  • Olivier Magand

    (Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE)

  • Jean Martins

    (Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE)

  • Cécile Agosta

    (Université Paris-Saclay)

  • Peter Crockford

    (Woods Hole Oceanographic Institution
    Harvard University)

  • Kanon Kobayashi

    (Tokyo Institute of Technology)

  • Shohei Hattori

    (Tokyo Institute of Technology
    Nanjing University
    Nanjing University)

  • Mark Curran

    (Energy, the Environment and Water
    Institute of Marine and Antarctic Studies, University of Tasmania)

  • Tas Ommen

    (Energy, the Environment and Water
    Institute of Marine and Antarctic Studies, University of Tasmania)

  • Lenneke Jong

    (Energy, the Environment and Water
    Institute of Marine and Antarctic Studies, University of Tasmania)

  • Jason L. Roberts

    (Energy, the Environment and Water
    Institute of Marine and Antarctic Studies, University of Tasmania)

Abstract

Standard proxies for reconstructing surface mass balance (SMB) in Antarctic ice cores are often inaccurate or coarsely resolved when applied to more complicated environments away from dome summits. Here, we propose an alternative SMB proxy based on photolytic fractionation of nitrogen isotopes in nitrate observed at 114 sites throughout East Antarctica. Applying this proxy approach to nitrate in a shallow core drilled at a moderate SMB site (Aurora Basin North), we reconstruct 700 years of SMB changes that agree well with changes estimated from ice core density and upstream surface topography. For the under-sampled transition zones between dome summits and the coast, we show that this proxy can provide past and present SMB values that reflect the immediate local environment and are derived independently from existing techniques.

Suggested Citation

  • Pete D. Akers & Joël Savarino & Nicolas Caillon & Aymeric P. M. Servettaz & Emmanuel Meur & Olivier Magand & Jean Martins & Cécile Agosta & Peter Crockford & Kanon Kobayashi & Shohei Hattori & Mark Cu, 2022. "Sunlight-driven nitrate loss records Antarctic surface mass balance," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-31855-7
    DOI: 10.1038/s41467-022-31855-7
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    References listed on IDEAS

    as
    1. Ben Bronselaer & Michael Winton & Stephen M. Griffies & William J. Hurlin & Keith B. Rodgers & Olga V. Sergienko & Ronald J. Stouffer & Joellen L. Russell, 2018. "Change in future climate due to Antarctic meltwater," Nature, Nature, vol. 564(7734), pages 53-58, December.
    2. Aidan Starr & Ian R. Hall & Stephen Barker & Thomas Rackow & Xu Zhang & Sidney R. Hemming & H. J. L. van der Lubbe & Gregor Knorr & Melissa A. Berke & Grant R. Bigg & Alejandra Cartagena-Sierra & Fran, 2021. "Antarctic icebergs reorganize ocean circulation during Pleistocene glacials," Nature, Nature, vol. 589(7841), pages 236-241, January.
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