Modelling mixed-phase clouds with the large-eddy model UCLALES-SALSA
Romakkaniemi S; Korhonen H; Kokkola H; Tonttila J; Raatikainen T; Ahola J
Modelling mixed-phase clouds with the large-eddy model UCLALES-SALSA
Romakkaniemi S
Korhonen H
Kokkola H
Tonttila J
Raatikainen T
Ahola J
COPERNICUS GESELLSCHAFT MBH
Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021042827540
https://urn.fi/URN:NBN:fi-fe2021042827540
Tiivistelmä
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.
Kokoelmat
- Rinnakkaistallenteet [19207]