Warm rain diagnostics (COSP and non-COSP)
Objective
Warm rain statistics may provide a process-based observational constraint on parameterized precipitation in GCMs, specifically on the cloud lifetime effect.
We have received base-state warm rain diagnostics from a number of models, but it would be especially useful to see how the warm diagnostics respond to changes in the warm rain (autoconversion/accretion) parameterization. We would therefore like to piggyback on existing AeroCom experiments (e.g., the multi-model PPE) with as little extra work as possible required for the modeling groups.
Required model diagnostics
If you are interested in participating and are COSP-enabled, please see COSP diagnostics. If you cannot run COSP, we would still be delighted to receive simpler, non-COSP, diagnostics.
COSP diagnostics
Consult the COSP warm rain diagnostics table.
Non-COSP diagnostics
To participate, please save one of the following sets of diagnostics:
- 3D snow and rain mixing ratios
- 3D snow and rain fluxes
- 2D snow and rain water paths
The required time frequency is 6-hourly non-accumulated. If this is not feasible for the requested 3D fields, it is possible to implement the warm-rain fraction as an online diagnostic (with monthly-mean 2D output) in the model; please contact Johannes for details.
Models participating so far
CAM5 (Contact: Shipeng Zhang, Minghuai Wang)
SPRINTARS (Contact: Takuro Michibata, Toshi Takemura)
IFS (Contact: Amund Søvde, Gunnar Myhre)
HadGEM-UKCA (Contact: Tom Langton, Philip Stier)
ECHAM-HAM (Contact: Johannes Mülmenstädt)
Contact
Kenta Suzuki: ksuzuki@aori.u-tokyo.ac.jp
Xianwen Jing: jing_xw@aori.u-tokyo.ac.jp
Johannes Mülmenstädt: johannes.muelmenstaedt@uni-leipzig.de