Modelling of cirrus clouds – Part 1b: Structuring cirrus clouds by dynamics
A recently developed and validated bulk microphysics scheme for modelling cirrus clouds (Spichtinger and Gierens, 2009), implemented into the anelastic non-hydrostatic model EULAG is used for investigation of the impact of dynamics on the evolution of an arctic cirrostratus. Sensitivity studies are...
| Published in: | Atmospheric Chemistry and Physics |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Copernicus Publications
2009
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| Subjects: | |
| Online Access: | https://doi.org/10.5194/acp-9-707-2009 https://noa.gwlb.de/receive/cop_mods_00047896 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00047516/acp-9-707-2009.pdf https://acp.copernicus.org/articles/9/707/2009/acp-9-707-2009.pdf |
| Summary: | A recently developed and validated bulk microphysics scheme for modelling cirrus clouds (Spichtinger and Gierens, 2009), implemented into the anelastic non-hydrostatic model EULAG is used for investigation of the impact of dynamics on the evolution of an arctic cirrostratus. Sensitivity studies are performed, using variation of large-scale updraughts as well as addition of small-scale temperature fluctuations and wind shear. The results show the importance of sedimentation of ice crystals on cloud evolution. Due to non-linear processes like homogeneous nucleation situations can arise where small changes in the outer parameters have large effects on the resulting cloud structure. In-cloud ice supersaturation is a common feature of all our simulations, and we show that dynamics is as least as important for its appearance than is microphysics. |
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