201312311818:
	/Users/heyc/tools/20thC/datm_diag_diff.sh	--->	ncar_precip_mean_YR_1948-2009-minus-prate_mean_YR_1948-2009.nc
	/Users/heyc/tools/20thC/datm_diag_diff.sh	--->	ncar_precip_mean_YR_1948-2009-minus-prate_mean_YR_1948-2009_PROJ_GL.*