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Contrary to long-standing assumptions, our laboratory and field data show that SOA particles are highly viscous semi-solids, trap volatile organic molecules during formation, evaporate orders of magnitude slower than assumed, and, therefore, are not at equilibrium with the gas phase.

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Document Title: Measurement-based SOA Paradigm
Category: Atmospheric Sciences
Media Type: Graphics
Date of Image/Photo: March 2015
Background: These particles generated by natural and anthropogenic sources are of interest because of their effect on air quality and health, and their impact on climate by scattering and absorbing solar radiation and influencing the formation and properties of clouds.
URL of this page: http://picturethis.pnl.gov/picturet.nsf/by+id/DRAE-,5,SR6

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