Ice-nucleating agents in sea spray aerosol identified and quantified with a holistic multimodal freezing model

Peter A. Alpert; Wendy P. Kilthau; Rachel E. O'Brien; Ryan C. Moffet; Mary K. Gilles; Bingbing Wang; Alexander Laskin; Josephine Y. Aller; Daniel A. Knopf

doi:10.1126/sciadv.abq6842

Ice-nucleating agents in sea spray aerosol identified and quantified with a holistic multimodal freezing model

Peter A. Alpert
, Wendy P. Kilthau
, Rachel E. O'Brien
, Ryan C. Moffet
, Mary K. Gilles
, Bingbing Wang
, Alexander Laskin
, Josephine Y. Aller
, Daniel A. Knopf

Paul Scherrer Institute
Stony Brook University
Lawrence Berkeley National Laboratory
College of William and Mary
University of Michigan, Ann Arbor
University of the Pacific
Sonoma Technology, Inc.
Pacific Northwest National Laboratory
Xiamen University
Purdue University

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

Sea spray aerosol (SSA) is a widely recognized important source of ice-nucleating particles (INPs) in the atmosphere. However, composition-specific identification, nucleation processes, and ice nucleation rates of SSA-INPs have not been well constrained. Microspectroscopic characterization of ambient and laboratory-generated SSA confirms that water-borne exudates from planktonic microorganisms composed of a mixture of proteinaceous and polysaccharidic compounds act as ice-nucleating agents (INAs). These data and data from previously published mesocosm and wave channel studies are subsequently used to further develop the stochastic freezing model (SFM) producing ice nucleation rate coefficients for SSA-INPs. The SFM simultaneously predicts immersion freezing and deposition and homogeneous ice nucleation by SSA particles under tropospheric conditions. Predicted INP concentrations agree with ambient and laboratory measurements. In addition, this holistic freezing model is independent of the source and exact composition of the SSA particles, making it well suited for implementation in cloud and climate models.

Original language	English
Article number	abq6842
Journal	Science Advances
Volume	8
Issue number	44
DOIs	https://doi.org/10.1126/sciadv.abq6842
State	Published - Nov 2022

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title = "Ice-nucleating agents in sea spray aerosol identified and quantified with a holistic multimodal freezing model",

abstract = "Sea spray aerosol (SSA) is a widely recognized important source of ice-nucleating particles (INPs) in the atmosphere. However, composition-specific identification, nucleation processes, and ice nucleation rates of SSA-INPs have not been well constrained. Microspectroscopic characterization of ambient and laboratory-generated SSA confirms that water-borne exudates from planktonic microorganisms composed of a mixture of proteinaceous and polysaccharidic compounds act as ice-nucleating agents (INAs). These data and data from previously published mesocosm and wave channel studies are subsequently used to further develop the stochastic freezing model (SFM) producing ice nucleation rate coefficients for SSA-INPs. The SFM simultaneously predicts immersion freezing and deposition and homogeneous ice nucleation by SSA particles under tropospheric conditions. Predicted INP concentrations agree with ambient and laboratory measurements. In addition, this holistic freezing model is independent of the source and exact composition of the SSA particles, making it well suited for implementation in cloud and climate models.",

author = "Alpert, \{Peter A.\} and Kilthau, \{Wendy P.\} and O'Brien, \{Rachel E.\} and Moffet, \{Ryan C.\} and Gilles, \{Mary K.\} and Bingbing Wang and Alexander Laskin and Aller, \{Josephine Y.\} and Knopf, \{Daniel A.\}",

note = "Publisher Copyright: {\textcopyright} 2022 The Authors.",

year = "2022",

month = nov,

doi = "10.1126/sciadv.abq6842",

language = "English",

volume = "8",

journal = "Science Advances",

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T1 - Ice-nucleating agents in sea spray aerosol identified and quantified with a holistic multimodal freezing model

AU - Alpert, Peter A.

AU - Kilthau, Wendy P.

AU - O'Brien, Rachel E.

AU - Moffet, Ryan C.

AU - Gilles, Mary K.

AU - Wang, Bingbing

AU - Laskin, Alexander

AU - Aller, Josephine Y.

AU - Knopf, Daniel A.

PY - 2022/11

Y1 - 2022/11

N2 - Sea spray aerosol (SSA) is a widely recognized important source of ice-nucleating particles (INPs) in the atmosphere. However, composition-specific identification, nucleation processes, and ice nucleation rates of SSA-INPs have not been well constrained. Microspectroscopic characterization of ambient and laboratory-generated SSA confirms that water-borne exudates from planktonic microorganisms composed of a mixture of proteinaceous and polysaccharidic compounds act as ice-nucleating agents (INAs). These data and data from previously published mesocosm and wave channel studies are subsequently used to further develop the stochastic freezing model (SFM) producing ice nucleation rate coefficients for SSA-INPs. The SFM simultaneously predicts immersion freezing and deposition and homogeneous ice nucleation by SSA particles under tropospheric conditions. Predicted INP concentrations agree with ambient and laboratory measurements. In addition, this holistic freezing model is independent of the source and exact composition of the SSA particles, making it well suited for implementation in cloud and climate models.

AB - Sea spray aerosol (SSA) is a widely recognized important source of ice-nucleating particles (INPs) in the atmosphere. However, composition-specific identification, nucleation processes, and ice nucleation rates of SSA-INPs have not been well constrained. Microspectroscopic characterization of ambient and laboratory-generated SSA confirms that water-borne exudates from planktonic microorganisms composed of a mixture of proteinaceous and polysaccharidic compounds act as ice-nucleating agents (INAs). These data and data from previously published mesocosm and wave channel studies are subsequently used to further develop the stochastic freezing model (SFM) producing ice nucleation rate coefficients for SSA-INPs. The SFM simultaneously predicts immersion freezing and deposition and homogeneous ice nucleation by SSA particles under tropospheric conditions. Predicted INP concentrations agree with ambient and laboratory measurements. In addition, this holistic freezing model is independent of the source and exact composition of the SSA particles, making it well suited for implementation in cloud and climate models.

UR - https://www.scopus.com/pages/publications/85141165432

U2 - 10.1126/sciadv.abq6842

DO - 10.1126/sciadv.abq6842

M3 - Article

C2 - 36322651

AN - SCOPUS:85141165432

SN - 2375-2548

VL - 8

JO - Science Advances

JF - Science Advances

IS - 44

M1 - abq6842

ER -

Ice-nucleating agents in sea spray aerosol identified and quantified with a holistic multimodal freezing model

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