Publication Abstracts

Avramov and Harrington 2010

Avramov, A., and J.Y. Harrington, 2010: The influence of parameterized ice habit on simulated mixed-phase Arctic clouds. J. Geophys. Res., 115, D03205, doi:10.1029/2009JD012108.

The phase-partitioning of cloud mass between liquid and ice in mixed-phase clouds, and its dependence on ambient ice nuclei (IN) concentrations and ice habit parameterizations is explored in this paper. Single and multi-layered cloud systems observed during the Mixed-Phase Arctic Cloud Experiment (M-PACE) were simulated with a cloud resolving model. The model used a two-moment (mass and number concentration) microphysical scheme with ice crystal habit parameterized by mass and fall-speed relationships and IN prediction scheme that accounts for depletion of IN through nucleation scavenging.

The mixed-phase cloud simulations show a strong sensitivity to the ambient deposition/condensation freezing IN concentrations, which is similar to some prior studies. This sensitivity depends on the mass, fall-speed, and capacitance relationships used to parameterize crystal habit and vapor growth: Mass and fall-speed relationships associated with compact, high- density crystals produce clouds with a weaker sensitivity to ambient IN concentrations whereas more extreme crystal shapes (e.g. dendrites) produce clouds with strong IN concentration sensitivity. This sensitivity also affects the number of liquid layers (from 1 to 5) predicted for the multi-layer case. The strength of the vapor growth rates and the crystal fall-speeds appear to be of roughly equal importance for determining the strength of mixed-phase cloud sensitivity to ice concentrations.

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BibTeX Citation

@article{av03000u,
  author={Avramov, A. and Harrington, J. Y.},
  title={The influence of parameterized ice habit on simulated mixed-phase Arctic clouds},
  year={2010},
  journal={J. Geophys. Res.},
  volume={115},
  pages={D03205},
  doi={10.1029/2009JD012108},
}

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RIS Citation

TY  - JOUR
ID  - av03000u
AU  - Avramov, A.
AU  - Harrington, J. Y.
PY  - 2010
TI  - The influence of parameterized ice habit on simulated mixed-phase Arctic clouds
JA  - J. Geophys. Res.
VL  - 115
SP  - D03205
DO  - 10.1029/2009JD012108
ER  -

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