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C. Resolution and dycore-dependent parameters

The following adjustable parameters differ between various dynamical cores and model resolutions in CAM 3.0.


Table C.1: Resolution and dycore-dependent parameters
Parameter FV T85 T42 T31 Description
$ q_{ic,warm}$ 8.e-4 4.e-4 4.e-4 4.e-4 threshold for autoconversion of warm ice
$ q_{ic,cold}$ 11.e-6 16.e-6 5.e-6 3.e-6 threshold for autoconversion of cold ice
$ k_{e,strat}$ 5.e-6 5.e-6 10.e-6 10.e-6 stratiform precipitation evaporation efficiency parameter
$ RH_{\min}^{low}$ .91 .91 .90 .88 minimum RH threshold for low stable clouds
$ RH_{\min}^{high}$ .80 .70 .80 .80 minimum RH threshold for high stable clouds
$ k_{1,shallow}$ 0.04 0.07 0.07 0.07 parameter for shallow convection cloud fraction
$ k_{1,deep}$ 0.10 0.14 0.14 0.14 parameter for deep convection cloud fraction
$ p_{mid}$ 750.e2 250.e2 750.e2 750.e2 top of area defined to be mid-level cloud
$ c_{0,shallow}$ 1.0e-4 1.0e-4 2.0e-4 5.0e-4 shallow convection precip production efficiency parameter
$ c_{0,deep}$ 3.5E-3 4.0E-3 3.0E-3 2.0E-3 deep convection precipitation production efficiency parameter
$ k_{e,conv}$ 1.0E-6 1.0E-6 3.0E-6 3.0E-6 convective precipitation evaporation efficiency parameter
dif4 N/A 1.0e15 1.0e16 2.0e16 horizontal diffusion coefficient


next up previous contents
Next: Bibliography Up: description Previous: B. Acronyms   Contents
Jim McCaa 2004-06-22