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Surface ocean microbiota determine cloud precursors.

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Ocean biology, specifically nanophytoplankton, significantly impacts sea spray and cloud properties. This biological influence on sea spray-derived Cloud Condensation Nuclei (CCN) fluxes is a crucial factor for climate models.

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Area of Science:

  • Oceanography
  • Atmospheric Science
  • Climate Science

Background:

  • Oceans influence climate through sea spray emissions affecting cloud properties.
  • Sea spray emissions depend on physicochemical parameters, but the role of ocean biology is poorly understood.

Purpose of the Study:

  • To investigate the relationship between ocean biology and sea spray fluxes.
  • To determine if nanophytoplankton abundance affects Cloud Condensation Nuclei (CCN) number fluxes.

Main Methods:

  • Collected seawater from three oceanic regions.
  • Measured nanophytoplankton cell abundances.
  • Generated sea spray and quantified CCN number fluxes.

Main Results:

  • A consistent, significant relationship was found between nanophytoplankton abundance and CCN number fluxes.
  • This biological influence on CCN fluxes can exceed one order of magnitude.
  • The sensitivity of CCN fluxes to ocean biology is not currently included in climate models.

Conclusions:

  • Oceanic nanophytoplankton abundance is a key factor controlling sea spray-derived CCN fluxes.
  • Incorporating biological influences on sea spray is essential for improving climate model accuracy.
  • This finding highlights a critical, underappreciated link between marine biology and climate regulation.