Biomass burning organic aerosol (BBOA) from wildfires has multiple phases and is more viscous than laboratory generated BBOA DOI Creative Commons
Nealan G. A. Gerrebos, Julia Zaks, Florence K. A. Gregson

et al.

Published: May 7, 2024

Biomass burning organic aerosol (BBOA) is a major contributor to in the atmosphere. The impacts of BBOA on climate and health depend strongly their physicochemical properties, including viscosity phase behaviour (number types phases); these relationships chemistry, are not yet fully characterized. We collected field samples during 2021 British Columbia wildfire season constrain at range relative humidities, compared them laboratory generated made from smoldering pine wood. Particles all exhibited two-phased with higher polarity hydrophilic core lower hydrophobic shell. used poke-flow technique estimate particles. found that both phases had viscosities >10 8 Pa s humidities up 50%, which more viscous than any or proxies previously measured. Aerosol mass spectrometry showed were oxidized those lab, likely explanation for viscosity. two high have implications how should be treated atmospheric models

Language: Английский

Biomass burning organic aerosol (BBOA) from wildfires has multiple phases and is more viscous than laboratory generated BBOA DOI Creative Commons
Nealan G. A. Gerrebos, Julia Zaks, Florence K. A. Gregson

et al.

Published: May 7, 2024

Biomass burning organic aerosol (BBOA) is a major contributor to in the atmosphere. The impacts of BBOA on climate and health depend strongly their physicochemical properties, including viscosity phase behaviour (number types phases); these relationships chemistry, are not yet fully characterized. We collected field samples during 2021 British Columbia wildfire season constrain at range relative humidities, compared them laboratory generated made from smoldering pine wood. Particles all exhibited two-phased with higher polarity hydrophilic core lower hydrophobic shell. used poke-flow technique estimate particles. found that both phases had viscosities >10 8 Pa s humidities up 50%, which more viscous than any or proxies previously measured. Aerosol mass spectrometry showed were oxidized those lab, likely explanation for viscosity. two high have implications how should be treated atmospheric models

Language: Английский

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