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If area units on source grid file are in sq deg, convert to sq radians #2022

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Nov 3, 2017
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If area units on source grid file are in sq deg, convert to sq radians #2022

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If area units on source grid file are in sq deg, convert to sq radians
billsacks Nov 2, 2017
2a8a76d
Abort if no units are found for grid_area
billsacks Nov 2, 2017
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16 changes: 13 additions & 3 deletions tools/mapping/gen_mapping_files/runoff_to_ocn/src/map_mod.F90
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Original file line number Diff line number Diff line change
Expand Up @@ -644,13 +644,23 @@ SUBROUTINE map_gridRead(map, rfilename, ofilename, gridtype, lmake_rSCRIP)

rcode = nf_inq_varid (fid,'grid_imask',vid )
rcode = nf_get_var_int (fid,vid ,map%mask_a)

rcode = nf_inq_varid (fid,'grid_area',vid )
if (rcode.eq.0) then
rcode = nf_get_var_double(fid,vid ,map%area_a)
else
if (rcode.ne.0) then
write(6,*) "ERROR: could not find variable grid_area in source grid input file!"
stop
end if
rcode = nf_get_var_double(fid,vid ,map%area_a)
units = "" ! units needs to be emptied before reading from netCDF file
rcode = nf_get_att_text(fid, vid, "units", units)
if (trim(units).eq."square radians") then
! Nothing to do
else if (trim(units).eq."square degrees") then
map%area_a = map%area_a * DEGtoRAD * DEGtoRAD
else
write(6,*) "ERROR: Unrecognized units for source grid_area: ", trim(units)
stop
end if

map%frac_a = map%mask_a * 1.0_r8

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