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<p>The impact that biogenic emissions have on aerosol-cloud interactions across the Southern Ocean is poorly quantified. Here we use satellite and ship observations during austral summer to study these interactions. We present observational evidence that biogenic aerosols increase cloud condensation nuclei and cloud droplet number concentrations over the Southern Ocean off East Antarctica, coinciding with very low concentrations of ice-nucleating particles and higher occurrences of supercooled liquid-containing low-level clouds.</p>

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Biological enhancement of cloud droplet concentrations observed off East Antarctica

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月20日

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  • Marc D. Mallet,
  • Branka Miljevic,
  • Ruhi S. Humphries,
  • Gerald G. Mace,
  • Simon P. Alexander,
  • Alain Protat,
  • Scott Chambers,
  • Luke Cravigan,
  • Paul J. DeMott,
  • Sonya Fiddes,
  • James Harnwell,
  • Melita D. Keywood,
  • Greg M. McFarquhar,
  • Ian McRobert,
  • Kathryn A. Moore,
  • Caleb Mynard,
  • Chiemeriwo Godday Osuagwu,
  • Zoran Ristovski,
  • Paul Selleck,
  • Sally Taylor,
  • Jason Ward,
  • Alastair Williams

摘要

The impact that biogenic emissions have on aerosol-cloud interactions across the Southern Ocean is poorly quantified. Here we use satellite and ship observations during austral summer to study these interactions. We present observational evidence that biogenic aerosols increase cloud condensation nuclei and cloud droplet number concentrations over the Southern Ocean off East Antarctica, coinciding with very low concentrations of ice-nucleating particles and higher occurrences of supercooled liquid-containing low-level clouds.