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Climate changes modulated the history of Arctic iodine during the Last Glacial Cycle

Author

Listed:
  • Juan Pablo Corella

    (Institute of Physical Chemistry Rocasolano, CSIC
    CIEMAT, Environmental Department)

  • Niccolo Maffezzoli

    (Physics of Ice Climate and Earth, Niels Bohr Institute, University of Copenhagen
    Institute of Polar Sciences, CNR- ISP
    Ca’ Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics)

  • Andrea Spolaor

    (Institute of Polar Sciences, CNR- ISP
    Ca’ Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics)

  • Paul Vallelonga

    (Physics of Ice Climate and Earth, Niels Bohr Institute, University of Copenhagen)

  • Carlos A. Cuevas

    (Institute of Physical Chemistry Rocasolano, CSIC)

  • Federico Scoto

    (Ca’ Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics
    Institute of Atmospheric Sciences and Climate, ISAC-CNR)

  • Juliane Müller

    (Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research
    MARUM Research Faculty, University of Bremen)

  • Bo Vinther

    (Physics of Ice Climate and Earth, Niels Bohr Institute, University of Copenhagen)

  • Helle A. Kjær

    (Physics of Ice Climate and Earth, Niels Bohr Institute, University of Copenhagen)

  • Giulio Cozzi

    (Institute of Polar Sciences, CNR- ISP
    Ca’ Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics)

  • Ross Edwards

    (Physics and Astronomy, Curtin University
    Department of Civil and Environmental Engineering, UW-Madison)

  • Carlo Barbante

    (Institute of Polar Sciences, CNR- ISP
    Ca’ Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics)

  • Alfonso Saiz-Lopez

    (Institute of Physical Chemistry Rocasolano, CSIC)

Abstract

Iodine has a significant impact on promoting the formation of new ultrafine aerosol particles and accelerating tropospheric ozone loss, thereby affecting radiative forcing and climate. Therefore, understanding the long-term natural evolution of iodine, and its coupling with climate variability, is key to adequately assess its effect on climate on centennial to millennial timescales. Here, using two Greenland ice cores (NEEM and RECAP), we report the Arctic iodine variability during the last 127,000 years. We find the highest and lowest iodine levels recorded during interglacial and glacial periods, respectively, modulated by ocean bioproductivity and sea ice dynamics. Our sub-decadal resolution measurements reveal that high frequency iodine emission variability occurred in pace with Dansgaard/Oeschger events, highlighting the rapid Arctic ocean-ice-atmosphere iodine exchange response to abrupt climate changes. Finally, we discuss if iodine levels during past warmer-than-present climate phases can serve as analogues of future scenarios under an expected ice-free Arctic Ocean. We argue that the combination of natural biogenic ocean iodine release (boosted by ongoing Arctic warming and sea ice retreat) and anthropogenic ozone-induced iodine emissions may lead to a near future scenario with the highest iodine levels of the last 127,000 years.

Suggested Citation

  • Juan Pablo Corella & Niccolo Maffezzoli & Andrea Spolaor & Paul Vallelonga & Carlos A. Cuevas & Federico Scoto & Juliane Müller & Bo Vinther & Helle A. Kjær & Giulio Cozzi & Ross Edwards & Carlo Barba, 2022. "Climate changes modulated the history of Arctic iodine during the Last Glacial Cycle," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-021-27642-5
    DOI: 10.1038/s41467-021-27642-5
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    References listed on IDEAS

    as
    1. Andrea Baccarini & Linn Karlsson & Josef Dommen & Patrick Duplessis & Jutta Vüllers & Ian M. Brooks & Alfonso Saiz-Lopez & Matthew Salter & Michael Tjernström & Urs Baltensperger & Paul Zieger & Julia, 2020. "Frequent new particle formation over the high Arctic pack ice by enhanced iodine emissions," Nature Communications, Nature, vol. 11(1), pages 1-11, December.
    2. Andrea Baccarini & Linn Karlsson & Josef Dommen & Patrick Duplessis & Jutta Vüllers & Ian M. Brooks & Alfonso Saiz-Lopez & Matthew Salter & Michael Tjernström & Urs Baltensperger & Paul Zieger & Julia, 2020. "Publisher Correction: Frequent new particle formation over the high Arctic pack ice by enhanced iodine emissions," Nature Communications, Nature, vol. 11(1), pages 1-1, December.
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