Testing capability to read/use lightning frequency & population density datasets. Calculates lightning ignitions using the SPITFIRE formulation and anthropogenic ignitions using the Li et al. 2012 formulation based on human population density implemented in CTSM-CN's fire model. Testing does not include a separate test for reading/using a successful ignitions dataset which uses the same format and units so handling is the same until you're in subroutine area_burnt_intensity where for "successful ignitions" the model selects currentSite%FDI = 1.0_r8 cloud_to_ground_strikes = 1.0_r8 while for lightning the model can use values < 1 for both. Lara Kueppers (UC-Berkeley) has access to a "successful ignitions" dataset for California that has not been placed in the repository of CTSM datasets as of 2020/6/6. That dataset can be used with the following settings: fates_spitfire_mode = 3 stream_fldfilename_lightng = '.../data_UCB/observed/CA_monthly_ignition_number_1980-2016/ignition_1980_to_2016_monthly_20190801.nc' stream_year_first_lightng = 1980 stream_year_last_lightng = 2016 model_year_align_lightng = 1980 where {...} = /fs/cgd/data0/slevis on izumi and /glade/work/slevis on cheyenne.