Publication Abstracts

Pierce et al. 2014

Pierce, J.R., D.M. Westervelt, S.A. Atwood, E.A. Barnes, and W.R. Leaitch, 2014: New-particle formation, growth and climate-relevant particle production in Egbert, Canada: Analysis from 1 year of size-distribution observations. Atmos. Chem. Phys., 14, 8647-8663, doi:10.5194/acp-14-8647-2014.

Aerosol particle nucleation, or new-particle formation, is the dominant contributor to particle number in the atmosphere. However, these particles must grow through condensation of low-volatility vapors without coagulating with the larger, preexisting particles in order to reach climate-relevant sizes (diameters larger than 50-100 nm), where the particles may affect clouds and radiation. In this paper, we use 1 year of size-distribution measurements from Egbert, Ontario, Canada to calculate the frequency of regional-scale new-particle-formation events, new-particle-formation rates, growth rates and the fraction of new particles that survive to reach climate-relevant sizes. Regional-scale new-particle-formation events occur on 14-31% of the days (depending on the stringency of the classification criteria), with event frequency peaking in the spring and fall. New-particle-formation rates and growth rates are similar to those measured at other midlatitude continental sites. We calculate that roughly half of the climate-relevant particles (with diameters larger than 50-100 nm) at Egbert are formed through new-particle-formation events. With the addition of meteorological and SO2 measurements, we find that new-particle formation at Egbert often occurs under synoptic conditions associated with high surface pressure and large-scale subsidence that cause sunny conditions and clean-air flow from the north and west. However, new-particle formation also occurs when air flows from the polluted regions to the south and southwest of Egbert. The new-particle-formation rates tend to be faster during events under the polluted south/southwest flow conditions.

Export citation: [ BibTeX ] [ RIS ]

BibTeX Citation

@article{pi01100l,
  author={Pierce, J. R. and Westervelt, D. M. and Atwood, S. A. and Barnes, E. A. and Leaitch, W. R.},
  title={New-particle formation, growth and climate-relevant particle production in Egbert, Canada: Analysis from 1 year of size-distribution observations},
  year={2014},
  journal={Atmos. Chem. Phys.},
  volume={14},
  pages={8647--8663},
  doi={10.5194/acp-14-8647-2014},
}

[ Close ]

RIS Citation

TY  - JOUR
ID  - pi01100l
AU  - Pierce, J. R.
AU  - Westervelt, D. M.
AU  - Atwood, S. A.
AU  - Barnes, E. A.
AU  - Leaitch, W. R.
PY  - 2014
TI  - New-particle formation, growth and climate-relevant particle production in Egbert, Canada: Analysis from 1 year of size-distribution observations
JA  - Atmos. Chem. Phys.
VL  - 14
SP  - 8647
EP  - 8663
DO  - 10.5194/acp-14-8647-2014
ER  -

[ Close ]

• Return to 2014 Publications

• Return to Publications Homepage