The effect of trimethylamine on atmospheric nucleation involving H2SO4
Item
Title (Dublin Core)
The effect of trimethylamine on atmospheric nucleation involving H2SO4
Description (Dublin Core)
Field observations and quantum chemical calculations have shown that organic amine compounds may be important for new particle formation involving H<sub>2</sub>SO<sub>4</sub>. Here, we report laboratory observations that investigate the effect of trimethylamine (TMA) on H<sub>2</sub>SO<sub>4</sub>-H<sub>2</sub>O nucleation made under aerosol precursor concentrations typically found in the lower troposphere ([H<sub>2</sub>SO<sub>4</sub>] of 10<sup>6</sup>−10<sup>7</sup> cm<sup>−3</sup>; [TMA] of 180–1350 pptv). The threshold [H<sub>2</sub>SO<sub>4</sub>] needed to produce the unity <i>J</i> was from 10<sup>6</sup>−10<sup>7</sup> cm<sup>−3</sup> and the slopes of Log <i>J</i> vs. Log [H<sub>2</sub>SO<sub>4</sub>] and Log <i>J</i> vs. Log [TMA] were 4–6 and 1, respectively, strikingly similar to the case of ammonia (NH<sub>3</sub> ternary nucleation (Benson et al., 2011). At lower RH, however, enhancement in <i>J</i> due to TMA was up to an order of magnitude greater than that due to NH<sub>3</sub>. These findings imply that both amines and NH<sub>3</sub> are important nucleation species, but under dry atmospheric conditions, amines may have stronger effects on H<sub>2</sub>SO<sub>4</sub> nucleation than NH<sub>3</sub>. Aerosol models should therefore take into account inorganic and organic base compounds together to fully understand the widespread new particle formation events in the lower troposphere.
Creator (Dublin Core)
Erupe, M. E.
Viggiano, A. A.
Lee, S.-H.
Date (Dublin Core)
2018-01-15
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-11-4767-2011
https://acp.copernicus.org/articles/11/4767/2011/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
