Updated transient_script_arohner version

Unmuted all lines and ran script entirely

Error: The last variable g_fld throws and error

Traceback (most recent call last): File "growth_model_transient_arohner.py", line 155, in g_fld = G_fld.reshape(len(depths), len(lat), len(lon)) NameError: name 'G_fld' is not defined