Stochastically Perturbed Parameter Scheme

A random pattern is used to perturb parameters in selected physics packages, namely

• the GF convection scheme,
• the MYNN PBL scheme,
• and the RUC LSM. Parameter perturbations to a single physics package can be achieved by setting spp_conv=1, spp_pbl=1 or spp_lsm=1. For implementation details see Jankov et al. (http://journals.ametsoc.org/doi/abs/10.1175/MWR-D-16-0160.1). The perturbation fields are saved as  pattern_spp_conv, pattern_spp_pbl, and pattern_spp_lsm in the history files.

See also: MYNN PBL scheme, Cumulus convection schemes, MOC Atmospheric Model Physics