A biogenic secondary organic aerosol source of cirrus ice nucleating particles

Martin J. Wolf, Yue Zhang, Maria A. Zawadowicz, Megan Goodell, Karl Froyd, Evelyn Freney, Karine Sellegri, Michael Rösch, Tianqu Cui, Margaux Winter, Larissa Lacher, Duncan Axisa, Paul J. DeMott, Ezra J. T. Levin, Ellen Gute, Jonathan Abbatt, Abigail Koss, Jesse H. Kroll, Jason D. Surratt and Daniel J. Cziczo ()
Additional contact information
Martin J. Wolf: Massachusetts Institute of Technology
Yue Zhang: University of North Carolina at Chapel Hill
Maria A. Zawadowicz: Massachusetts Institute of Technology
Megan Goodell: Massachusetts Institute of Technology
Karl Froyd: NOAA Earth System Research Laboratory (ESRL), Chemical Sciences Division
Evelyn Freney: Université Clermont Auvergne, CNRS, Laboratoire de Météorologie Physique (LaMP)
Karine Sellegri: Université Clermont Auvergne, CNRS, Laboratoire de Météorologie Physique (LaMP)
Michael Rösch: Massachusetts Institute of Technology
Tianqu Cui: University of North Carolina at Chapel Hill
Margaux Winter: University of North Carolina at Chapel Hill
Larissa Lacher: Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research (IMK-AAF)
Duncan Axisa: Droplet Measurement Technologies
Paul J. DeMott: Colorado State University
Ezra J. T. Levin: Colorado State University
Ellen Gute: University of Toronto
Jonathan Abbatt: University of Toronto
Abigail Koss: Massachusetts Institute of Technology
Jesse H. Kroll: Massachusetts Institute of Technology
Jason D. Surratt: University of North Carolina at Chapel Hill
Daniel J. Cziczo: University of North Carolina at Chapel Hill

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: Abstract Atmospheric ice nucleating particles (INPs) influence global climate by altering cloud formation, lifetime, and precipitation efficiency. The role of secondary organic aerosol (SOA) material as a source of INPs in the ambient atmosphere has not been well defined. Here, we demonstrate the potential for biogenic SOA to activate as depositional INPs in the upper troposphere by combining field measurements with laboratory experiments. Ambient INPs were measured in a remote mountaintop location at –46 °C and an ice supersaturation of 30% with concentrations ranging from 0.1 to 70 L–1. Concentrations of depositional INPs were positively correlated with the mass fractions and loadings of isoprene-derived secondary organic aerosols. Compositional analysis of ice residuals showed that ambient particles with isoprene-derived SOA material can act as depositional ice nuclei. Laboratory experiments further demonstrated the ability of isoprene-derived SOA to nucleate ice under a range of atmospheric conditions. We further show that ambient concentrations of isoprene-derived SOA can be competitive with other INP sources. This demonstrates that isoprene and potentially other biogenically-derived SOA materials could influence cirrus formation and properties.

Date: 2020
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DOI: 10.1038/s41467-020-18424-6

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