Seadas T2022.2 modis_atteph and getanc issues

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OB SeaDAS - dshea
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Re: Seadas T2022.2 modis_atteph and getanc issues

by OB SeaDAS - dshea » Tue Apr 26, 2022 2:14 pm America/New_York

if you look at the SST file you will notice that there is an ice variable in it, so it has the ice fraction data. For example:

Code: Select all

dshea@gs616-skeletonema ~ % ncdump -h /Users/dshea/ocssw/var/anc/2018/023/N2018023_SST_OIV2AV_24h.nc      
netcdf N2018023_SST_OIV2AV_24h {
dimensions:
	time = UNLIMITED ; // (1 currently)
	zlev = 1 ;
	lat = 720 ;
	lon = 1440 ;
variables:
	float time(time) ;
		time:long_name = "Center time of the day" ;
		time:units = "days since 1978-01-01 00:00:00" ;
	float zlev(zlev) ;
		zlev:long_name = "Sea surface height" ;
		zlev:units = "meters" ;
		zlev:positive = "down" ;
		zlev:actual_range = "0, 0" ;
	float lat(lat) ;
		lat:long_name = "Latitude" ;
		lat:units = "degrees_north" ;
		lat:grids = "Uniform grid from -89.875 to 89.875 by 0.25" ;
	float lon(lon) ;
		lon:long_name = "Longitude" ;
		lon:units = "degrees_east" ;
		lon:grids = "Uniform grid from 0.125 to 359.875 by 0.25" ;
	short sst(time, zlev, lat, lon) ;
		sst:long_name = "Daily sea surface temperature" ;
		sst:units = "Celsius" ;
		sst:_FillValue = -999s ;
		sst:add_offset = 0.f ;
		sst:scale_factor = 0.01f ;
		sst:valid_min = -300s ;
		sst:valid_max = 4500s ;
	short anom(time, zlev, lat, lon) ;
		anom:long_name = "Daily sea surface temperature anomalies" ;
		anom:units = "Celsius" ;
		anom:_FillValue = -999s ;
		anom:add_offset = 0.f ;
		anom:scale_factor = 0.01f ;
		anom:valid_min = -1200s ;
		anom:valid_max = 1200s ;
	short err(time, zlev, lat, lon) ;
		err:long_name = "Estimated error standard deviation of analysed_sst" ;
		err:units = "Celsius" ;
		err:_FillValue = -999s ;
		err:add_offset = 0.f ;
		err:scale_factor = 0.01f ;
		err:valid_min = 0s ;
		err:valid_max = 1000s ;
	short ice(time, zlev, lat, lon) ;
		ice:long_name = "Sea ice concentration" ;
		ice:units = "%" ;
		ice:_FillValue = -999s ;
		ice:add_offset = 0.f ;
		ice:scale_factor = 0.01f ;
		ice:valid_min = 0s ;
		ice:valid_max = 100s ;

// global attributes:
		:Conventions = "CF-1.6" ;
		:title = "NCEI Daily-OISST-V2 based mainly on AVHRR, Final" ;
		:history = "Version 2.0" ;
		:creation_date = "2018-02-07 11:16" ;
		:source_data = "NCEP GTS,AVHRR19,MetOpA,NCEP ICE" ;
		:source = "NOAA/National Centers for Environmental Information" ;
		:contact = "oisst-help, email: oisst-help@noaa.gov" ;
}
don

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OB SeaDAS - knowles
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Re: Seadas T2022.2 modis_atteph and getanc issues

by OB SeaDAS - knowles » Tue Apr 26, 2022 4:14 pm America/New_York

There is a sea ice concentration band contained within the SST ancillary file, so this replaces the NSIDC file. Going forward, the program getanc will return the SST file for both the sstfile and icefile parameters and will not return the NSIDC file for the icefile parameter.

melinfr
Posts: 6
Joined: Mon Aug 08, 2005 12:43 pm America/New_York

Re: Seadas T2022.2 modis_atteph and getanc issues

by melinfr » Thu May 05, 2022 4:59 am America/New_York

Dear support,
thanks very much for the clarification.

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