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
Discussion papers
https://doi.org/10.5194/acp-2018-502
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2018-502
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 22 Jun 2018

Research article | 22 Jun 2018

Review status
This discussion paper is a preprint. A revision of this manuscript was accepted for the journal Atmospheric Chemistry and Physics (ACP) and is expected to appear here in due course.

The effect of secondary ice production parameterization on the simulation of a cold frontal rainband

Sylvia C. Sullivan1,2, Christian Barthlott1, Jonathan Crosier3, Athanasios Nenes2,4,5, and Corinna Hoose1 Sylvia C. Sullivan et al.
  • 1Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
  • 2Department of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
  • 3School of Earth, Atmospheric, and Environmental Studies, University of Manchester, Manchester, UK
  • 4ICE-HT, Foundation for Research and Technology, Hellas, 26504 Patras, Greece
  • 5Institute of Environmental Research and Sustainable Development, National Observatory of Athens, 15236, Palea Penteli, Greece

Abstract. Secondary ice production via processes like rime splintering, frozen droplet shattering, and breakup upon ice hydrometeor collision have been proposed to explain discrepancies between in-cloud ice crystal and ice-nucleating particle numbers. To understand the impact of this kind of additional ice number generation on surface precipitation, we present one of the first studies to implement frozen droplet shattering and ice-ice collisional breakup parameterizations in a larger-scale model. We simulate a cold frontal rainband from the Aerosol Properties, PRocesses, And InfluenceS on the Earth's Climate campaign and investigate the impact of the new parameterizations on the simulated ice crystal number concentrations (ICNC) and precipitation. Near the convective regions of the rainband, contributions to ICNC can be as large from secondary production as from primary nucleation, but ICNCs greater than 50L−1 remain underestimated by the model. Addition of the secondary production parameterizations also clearly intensifies the differences in both accumulated precipitation and precipitation rate between the convective towers and non-convective gap regions. We suggest, then, that secondary ice production parameterizations be included in large-scale models on the basis of large hydrometeor concentration and convective activity criteria.

Sylvia C. Sullivan et al.
Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Sylvia C. Sullivan et al.
Data sets

Secondary ice production parameterization output – COSMO model S. C. Sullivan, C. Barthlott, J. Crosier, A. Nenes, and C. Hoose https://doi.org/10.5281/zenodo.1296185

Sylvia C. Sullivan et al.
Viewed
Total article views: 410 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
295 98 17 410 18 14 8
  • HTML: 295
  • PDF: 98
  • XML: 17
  • Total: 410
  • Supplement: 18
  • BibTeX: 14
  • EndNote: 8
Views and downloads (calculated since 22 Jun 2018)
Cumulative views and downloads (calculated since 22 Jun 2018)
Viewed (geographical distribution)
Total article views: 410 (including HTML, PDF, and XML) Thereof 407 with geography defined and 3 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited
Saved
No saved metrics found.
Discussed
No discussed metrics found.
Latest update: 15 Nov 2018
Publications Copernicus
Download
Short summary
Ice crystal formation in clouds can occur via thermodynamic nucleation, but also via mechanical collisions between pre-existing crystals or co-existing droplets. When descriptions of this mechanical ice generation are implemented into the COSMO weather model, we find that the contributions to crystal number from thermodynamic and mechanical processes are of the same order. Mechanical ice generation also intensifies differences in precipitation intensity between dynamic and quiescent regions.
Ice crystal formation in clouds can occur via thermodynamic nucleation, but also via mechanical...
Citation
Share