A two-dimensional volatility basis set: 1. organic-aerosol mixing thermodynamics
Item
Title (Dublin Core)
A two-dimensional volatility basis set: 1. organic-aerosol mixing thermodynamics
Description (Dublin Core)
We develop the thermodynamic underpinnings of a two-dimensional volatility basis set (2D-VBS) employing saturation mass concentration (<i>C</i><sup>o</sup>) and the oxygen content (O:C) to describe volatility, mixing thermodynamics, and chemical evolution of organic aerosol. The work addresses a simple question: "Can we reasonably constrain organic-aerosol composition in the atmosphere based on only two measurable organic properties, volatility and the extent of oxygenation?" This is an extension of our earlier one-dimensional approach employing volatility only (<i>C</i><sup>*</sup> = γ <i>C</i><sup>o</sup>, where γ is an activity coefficient). Using available constraints on bulk organic-aerosol composition, we argue that one can reasonably predict the composition of organics (carbon, oxygen and hydrogen numbers) given a location in the <i>C</i><sup>o</sup> – O:C space. Further, we argue that we can constrain the activity coefficients at various locations in this space based on the O:C of the organic aerosol.
Creator (Dublin Core)
Donahue, N. M.
Epstein, S. A.
Pandis, S. N.
Robinson, A. L.
Date (Dublin Core)
2018-01-15
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-11-3303-2011
https://acp.copernicus.org/articles/11/3303/2011/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
