Modelling mixed-phase clouds with the large-eddy model UCLALES–SALSA
The large-eddy model UCLALES–SALSA, with an exceptionally detailed aerosol description for both aerosol number and chemical composition, has been extended for ice and mixed-phase clouds. Comparison to a previous mixed-phase cloud model intercomparison study confirmed the accuracy of newly implemente...
| Published in: | Atmospheric Chemistry and Physics |
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| Main Authors: | , , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
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Copernicus Publications
2020
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| Subjects: | |
| Online Access: | https://doi.org/10.5194/acp-20-11639-2020 https://noa.gwlb.de/receive/cop_mods_00054318 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00053969/acp-20-11639-2020.pdf https://acp.copernicus.org/articles/20/11639/2020/acp-20-11639-2020.pdf |
| Summary: | The large-eddy model UCLALES–SALSA, with an exceptionally detailed aerosol description for both aerosol number and chemical composition, has been extended for ice and mixed-phase clouds. Comparison to a previous mixed-phase cloud model intercomparison study confirmed the accuracy of newly implemented ice microphysics. A further simulation with a heterogeneous ice nucleation scheme, in which ice-nucleating particles (INPs) are also a prognostic variable, captured the typical layered structure of Arctic mid-altitude mixed-phase cloud: a liquid layer near cloud top and ice within and below the liquid layer. In addition, the simulation showed a realistic freezing rate of droplets within the vertical cloud structure. The represented detailed sectional ice microphysics with prognostic aerosols is crucially important in reproducing mixed-phase clouds. |
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