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Frequent new particle formation over the high Arctic pack ice by enhanced iodine emissions

Author

Listed:
  • Andrea Baccarini

    (Paul Scherrer Institute)

  • Linn Karlsson

    (Stockholm University)

  • Josef Dommen

    (Paul Scherrer Institute)

  • Patrick Duplessis

    (Dalhousie University)

  • Jutta Vüllers

    (University of Leeds)

  • Ian M. Brooks

    (University of Leeds)

  • Alfonso Saiz-Lopez

    (CSIC)

  • Matthew Salter

    (Stockholm University)

  • Michael Tjernström

    (Stockholm University)

  • Urs Baltensperger

    (Paul Scherrer Institute)

  • Paul Zieger

    (Stockholm University)

  • Julia Schmale

    (Paul Scherrer Institute
    École Polytechnique Fédérale de Lausanne)

Abstract

In the central Arctic Ocean the formation of clouds and their properties are sensitive to the availability of cloud condensation nuclei (CCN). The vapors responsible for new particle formation (NPF), potentially leading to CCN, have remained unidentified since the first aerosol measurements in 1991. Here, we report that all the observed NPF events from the Arctic Ocean 2018 expedition are driven by iodic acid with little contribution from sulfuric acid. Iodic acid largely explains the growth of ultrafine particles (UFP) in most events. The iodic acid concentration increases significantly from summer towards autumn, possibly linked to the ocean freeze-up and a seasonal rise in ozone. This leads to a one order of magnitude higher UFP concentration in autumn. Measurements of cloud residuals suggest that particles smaller than 30 nm in diameter can activate as CCN. Therefore, iodine NPF has the potential to influence cloud properties over the Arctic Ocean.

Suggested Citation

  • 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.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18551-0
    DOI: 10.1038/s41467-020-18551-0
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    Cited by:

    1. 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.
    2. Lubna Dada & Hélène Angot & Ivo Beck & Andrea Baccarini & Lauriane L. J. Quéléver & Matthew Boyer & Tiia Laurila & Zoé Brasseur & Gina Jozef & Gijs Boer & Matthew D. Shupe & Silvia Henning & Silvia Bu, 2022. "A central arctic extreme aerosol event triggered by a warm air-mass intrusion," Nature Communications, Nature, vol. 13(1), pages 1-15, December.
    3. Jessie M. Creamean & Kevin Barry & Thomas C. J. Hill & Carson Hume & Paul J. DeMott & Matthew D. Shupe & Sandro Dahlke & Sascha Willmes & Julia Schmale & Ivo Beck & Clara J. M. Hoppe & Allison Fong & , 2022. "Annual cycle observations of aerosols capable of ice formation in central Arctic clouds," Nature Communications, Nature, vol. 13(1), pages 1-12, December.

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