This is a simple snow model with BMI (Basic Model Interface of CSDMS) in Fortran cooperatively-developed by Kang Wang (University of Colorado Boulder), Ross Brown (Environment Canada), and Bruce Brasnett (Canadian Meteorological Centre). It's an empirical algorithm to melt snow according to the surface temperature and increase snow depth according to the precipitation that has fallen since the last analysis time.
Anaconda is starting to use gfortran 9.3.0. This PR is to check that ecsimplesnow builds with this updated compiler version.