Biological and Environmental Research - Earth and Environmental System Sciences
Earth and Environmental System Modeling

Numerical Representations of Marine Ice‐Nucleating Particles in Remote Marine Environments Evaluated Against Observations

TitleNumerical Representations of Marine Ice‐Nucleating Particles in Remote Marine Environments Evaluated Against Observations
Publication TypeJournal Article
Year of Publication2019
AuthorsMcCluskey, CS, DeMott PJ, Ma P-L, and Burrows SM
JournalGeophysical Research Letters
Volume46
Number13
Pages7838-7847
Abstract / Summary

The abundance and sources of ice‐nucleating particles, particles required for heterogeneous ice nucleation, are long‐standing sources of uncertainty in quantifying aerosol‐cloud interactions. In this study, we demonstrate near closure between immersion freezing ice‐nucleating particle number concentration (nINPs) observations and nINPs calculated from simulated sea spray aerosol and dust. The Community Atmospheric Model with constrained meteorology was used to simulate aerosol concentrations at the Mace Head Research Station (North Atlantic) and over the Southern Ocean to the south of Tasmania (Clouds, Aerosols, Precipitation, Radiation, and atmospherIc Composition Over the southeRN ocean campaign). Model‐predicted nINPs were within a factor of 10 of nINPs observed with an off‐line ice spectrometer at Mace Head Research Station and Clouds, Aerosols, Precipitation, Radiation, and atmospherIc Composition Over the southeRN ocean campaign, for 93% and 69% of observations, respectively. Simulated vertical profiles of nINPs reveal that transported dust may be critical to nINPs in remote regions and that sea spray aerosol may be the dominant contributor to primary ice nucleation in Southern Ocean low‐level mixed‐phase clouds.

URLhttp://dx.doi.org/10.1029/2018gl081861
DOI10.1029/2018gl081861
Journal: Geophysical Research Letters
Year of Publication: 2019
Volume: 46
Number: 13
Pages: 7838-7847
Publication Date: 07/2019

The abundance and sources of ice‐nucleating particles, particles required for heterogeneous ice nucleation, are long‐standing sources of uncertainty in quantifying aerosol‐cloud interactions. In this study, we demonstrate near closure between immersion freezing ice‐nucleating particle number concentration (nINPs) observations and nINPs calculated from simulated sea spray aerosol and dust. The Community Atmospheric Model with constrained meteorology was used to simulate aerosol concentrations at the Mace Head Research Station (North Atlantic) and over the Southern Ocean to the south of Tasmania (Clouds, Aerosols, Precipitation, Radiation, and atmospherIc Composition Over the southeRN ocean campaign). Model‐predicted nINPs were within a factor of 10 of nINPs observed with an off‐line ice spectrometer at Mace Head Research Station and Clouds, Aerosols, Precipitation, Radiation, and atmospherIc Composition Over the southeRN ocean campaign, for 93% and 69% of observations, respectively. Simulated vertical profiles of nINPs reveal that transported dust may be critical to nINPs in remote regions and that sea spray aerosol may be the dominant contributor to primary ice nucleation in Southern Ocean low‐level mixed‐phase clouds.

DOI: 10.1029/2018gl081861
Citation:
McCluskey, C, P DeMott, P Ma, and S Burrows.  2019.  "Numerical Representations of Marine Ice‐Nucleating Particles in Remote Marine Environments Evaluated Against Observations."  Geophysical Research Letters 46(13): 7838-7847.  https://doi.org/10.1029/2018gl081861.