Atmospheric homogeneous nucleation of H2SO4 and H2O
Item
Title (Dublin Core)
Atmospheric homogeneous nucleation of H2SO4 and H2O
Description (Dublin Core)
We report laboratory observations of H<sub>2</sub>SO<sub>4</sub> and H<sub>2</sub>O homogeneous nucleation made under atmospherically relevant conditions ([H<sub>2</sub>SO<sub>4</sub>] of 10<sup>6</sup> – 10<sup>7</sup> cm<sup>−3</sup> and 287 K). Our observations show that nucleation takes place at [H<sub>2</sub>SO<sub>4</sub>] of 10<sup>6</sup> – 10<sup>7</sup> cm<sup>−3</sup>, as observed in the atmosphere. The slope of nucleation rate (<i>J</i>) vs. [H<sub>2</sub>SO<sub>4</sub>] ranges between 4–6, consistent with thermodynamic predictions of neutral H<sub>2</sub>SO<sub>4</sub> clusters, but is higher than those observed in the atmosphere. These results indicate that ternary aerosol precursors are needed to reduce the slope to 1–2 in the atmosphere. This study also discusses the effects of experimental parameters on laboratory observation results, in order to properly interpret the experimental data.
Creator (Dublin Core)
Benson, D. R.
Erupe, M. E.
Yu, J. H.
Markovich, A.
Lee, S.-H.
Date (Dublin Core)
2018-08-10
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acpd-10-29051-2010
https://acp.copernicus.org/preprints/acp-2010-867/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
