Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.509 IF 5.509
  • IF 5-year value: 5.689 IF 5-year 5.689
  • CiteScore value: 5.44 CiteScore 5.44
  • SNIP value: 1.519 SNIP 1.519
  • SJR value: 3.032 SJR 3.032
  • IPP value: 5.37 IPP 5.37
  • h5-index value: 86 h5-index 86
  • Scimago H index value: 161 Scimago H index 161
Volume 16, issue 12
Atmos. Chem. Phys., 16, 7663-7679, 2016
https://doi.org/10.5194/acp-16-7663-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: NETCARE (Network on Aerosols and Climate: Addressing Key Uncertainties...

Atmos. Chem. Phys., 16, 7663-7679, 2016
https://doi.org/10.5194/acp-16-7663-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 23 Jun 2016

Research article | 23 Jun 2016

Growth of nucleation mode particles in the summertime Arctic: a case study

Megan D. Willis1, Julia Burkart1, Jennie L. Thomas2, Franziska Köllner3, Johannes Schneider3, Heiko Bozem4, Peter M. Hoor4, Amir A. Aliabadi5,a, Hannes Schulz6, Andreas B. Herber6, W. Richard Leaitch5, and Jonathan P. D. Abbatt1 Megan D. Willis et al.
  • 1University of Toronto, Department of Chemistry, Toronto, Ontario, Canada
  • 2LATMOS/IPSL, UPMC Sorbonne Universités, UVSQ, CNRS, Paris, France
  • 3Max Planck Institute for Chemistry, Particle Chemistry Department, Mainz, Germany
  • 4Johannes Gutenberg University of Mainz, Institute for Atmospheric Physics, Mainz, Germany
  • 5Environment and Climate Change Canada, Toronto, Ontario, Canada
  • 6Alfred Wegener Institute Helmholtz Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany
  • anow at: Massachusetts Institute of Technology, Department of Architecture, Cambridge, USA

Abstract. The summertime Arctic lower troposphere is a relatively pristine background aerosol environment dominated by nucleation and Aitken mode particles. Understanding the mechanisms that control the formation and growth of aerosol is crucial for our ability to predict cloud properties and therefore radiative balance and climate. We present an analysis of an aerosol growth event observed in the Canadian Arctic Archipelago during summer as part of the NETCARE project. Under stable and clean atmospheric conditions, with low inversion heights, carbon monoxide less than 80ppbv, and black carbon less than 5ngm−3, we observe growth of small particles,  < 20nm in diameter, into sizes above 50nm. Aerosol growth was correlated with the presence of organic species, trimethylamine, and methanesulfonic acid (MSA) in particles ∼80nm and larger, where the organics are similar to those previously observed in marine settings. MSA-to-sulfate ratios as high as 0.15 were observed during aerosol growth, suggesting an important marine influence. The organic-rich aerosol contributes significantly to particles active as cloud condensation nuclei (CCN, supersaturation = 0.6%), which are elevated in concentration during aerosol growth above background levels of ∼ 100 to ∼ 220cm−3. Results from this case study highlight the potential importance of secondary organic aerosol formation and its role in growing nucleation mode aerosol into CCN-active sizes in this remote marine environment.

Publications Copernicus
Special issue
Download
Short summary
We present a case study focused on an aerosol growth event observed in the Canadian High Arctic during summer. Using measurements of aerosol chemical and physical properties we find evidence for aerosol growth into cloud condensation nuclei-active sizes, through marine-influenced secondary organic aerosol formation. Understanding the mechanisms that control the formation and growth of aerosol is crucial for our ability to predict cloud properties, and therefore radiative balance and climate.
We present a case study focused on an aerosol growth event observed in the Canadian High Arctic...
Citation
Share