Articles | Volume 23, issue 15
https://doi.org/10.5194/acp-23-8659-2023
https://doi.org/10.5194/acp-23-8659-2023
Research article
 | 
08 Aug 2023
Research article |  | 08 Aug 2023

Physicochemical characterization of free troposphere and marine boundary layer ice-nucleating particles collected by aircraft in the eastern North Atlantic

Daniel A. Knopf, Peiwen Wang, Benny Wong, Jay M. Tomlin, Daniel P. Veghte, Nurun N. Lata, Swarup China, Alexander Laskin, Ryan C. Moffet, Josephine Y. Aller, Matthew A. Marcus, and Jian Wang

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Cited articles

Aller, J. Y., Radway, J. C., Kilthau, W. P., Bothe, D. W., Wilson, T. W., Vaillancourt, R. D., Quinn, P. K., Coffman, D. J., Murray, B. J., and Knopf, D. A.: Size-resolved characterization of the polysaccharidic and proteinaceous components of sea spray aerosol, Atmos. Environ., 154, 331–347, https://doi.org/10.1016/j.atmosenv.2017.01.053, 2017. 
Alonso-Perez, S., Cuevas, E., Querol, X., Guerra, J. C., and Perez, C.: African dust source regions for observed dust outbreaks over the Subtropical Eastern North Atlantic region, above 25 N, J. Arid. Environ., 78, 100–109, https://doi.org/10.1016/j.jaridenv.2011.11.013, 2012. 
Alpert, P. A. and Knopf, D. A.: Analysis of isothermal and cooling-rate-dependent immersion freezing by a unifying stochastic ice nucleation model, Atmos. Chem. Phys., 16, 2083–2107, https://doi.org/10.5194/acp-16-2083-2016, 2016. 
Alpert, P. A., Aller, J. Y., and Knopf, D. A.: Ice nucleation from aqueous NaCl droplets with and without marine diatoms, Atmos. Chem. Phys., 11, 5539–5555, https://doi.org/10.5194/acp-11-5539-2011, 2011a. 
Alpert, P. A., Aller, J. Y., and Knopf, D. A.: Initiation of the ice phase by marine biogenic surfaces in supersaturated gas and supercooled aqueous phases, Phys. Chem. Chem. Phys., 13, 19882–19894, https://doi.org/10.1039/C1CP21844A, 2011b. 
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Ambient particle populations and associated ice-nucleating particles (INPs) were examined from particle samples collected on board aircraft in the marine boundary layer and free troposphere in the eastern North Atlantic during summer and winter. Chemical imaging shows distinct differences in the particle populations seasonally and with sampling altitudes, which are reflected in the INP types. Freezing parameterizations are derived for implementation in cloud-resolving and climate models.
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