Update FENGSHA settings: adjust alpha, soil moisture, and dry limit factors

Author: bbakernoaa

parm/ufs/gocart/DU2G_instance_DU.rc

@@ -52,10 +52,10 @@ pressure_lid_in_hPa: 0.01
 emission_scheme: fengsha       # choose among: fengsha, ginoux, k14
 
 # FENGSHA settings
-alpha: 0.16
+alpha: 0.2
 gamma: 1.0
-soil_moisture_factor: 1
-soil_drylimit_factor: 1.0
+soil_moisture_factor: 1.0
+soil_drylimit_factor: 1.2
 vertical_to_horizontal_flux_ratio_limit: 2.e-04
 drag_partition_option: 1