Mixed-phase cloud ice nucleation
- A new ice nucleation parameterization based on classical nucleation theory has been implemented in CAM5, which links ice nucleation to aerosol (dust and soot) properties. This is to replace the Meyers et al. (1992) parameterization which does not have any relationship to aerosols
Preexisting ice crystal effect in cirrus clouds
- Implement preexisting ice crystal effect on ice nucleation in cirrus clouds
- Introduce in-cloud variability of ice saturation ratio and occurrence fraction of homogeneous freezing
- Remove two non-physical limiters (upper limiter of subgrid updraft velocity and lower limiter of sulfate aerosol size) used in the ice nucleation parameterization in cirrus clouds
New ice nucleation + MG1
| ID | Case Description | Diagnostics | Details/Comments |
|---|---|---|---|
| N1 | MG1 with mixed phase cloud ice nucleation vs MG1 base |
 Comments:Your comments |
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| N2 | MG1 with preexisting ice vs MG1 base |
Comments: Your comments |
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| N3 | MG1 with combined mixed phase ice nucleation & preexisting ice vs MG1 base |
Comments: Your comments |
New ice nucleation + MG2
| ID | Case Description | Diagnostics | Details/Comments |
|---|---|---|---|
| I1 | MG2 with mixed phase cloud ice nucleation vs MG2 base |
Comments: Your comments |
|
| I2 | MG2 with preexisting ice vs MG2 base |
Comments: Your comments |
|
| I3 | MG2 with combined mixed phase ice nucleation & preexisting ice vs MG2 base |
Comments: Your comments |