---Vanúcia SchumacherMestranda em Meteorologia - UFVMeteorologista -UFPel
Departamento de Meteorologia Agrícola - DEACel: (31) 9978 2522 DEA: (31) 3899 1890
From: vanucia-schumacher@hotmail.com
To: maria.gehne@noaa.gov
Subject: RE: [ncl-talk] question about satellite data
Date: Wed, 23 Jul 2014 00:01:52 +0000
Hi Maria,
the problem is not this, because already changed the data to float and not resolved, I need to access a range and he plots another.
Variable: fType: filefilename: tospath: tos.nc file global attributes: dimensions: time = 391 nbnds = 2 lat = 224 lon = 256 variables: double time_bnds ( time, nbnds ) long_name : Time Boundaries
double time ( time ) units : days since 1800-1-1 00:00:00 long_name : Time actual_range : ( 66443, 78313 ) delta_t : 0000-01-00 00:00:00 avg_period : 0000-01-00 00:00:00 prev_avg_period : 0000-00-07 00:00:00 standard_name : time axis : T bounds : time_bnds
float sst ( time, lat, lon ) remap : remapped via ESMF_regrid_with_weights: Bilinear remapping long_name : Monthly Mean of Sea Surface Temperature unpacked_valid_range : ( -5, 40 ) actual_range : ( -1.8, 35.31 ) units : degC add_offset : 0 scale_factor : 0.01 missing_value : 32767 precision : 2 least_significant_digit : 2 var_desc : Sea Surface Temperature dataset : NOAA Optimum Interpolation (OI) SST V2 level_desc : Surface statistic : Mean parent_stat : Weekly Mean standard_name : sea_surface_temperature cell_methods : time: mean (monthly from weekly values interpolated to daily) valid_range : ( -500, 4000 ) _FillValue : 32767
double lat ( lat ) long_name : latitude units : degrees_north
double lon ( lon ) long_name : longitude units : degrees_east
---Vanúcia SchumacherMestranda em Meteorologia - UFVMeteorologista -UFPel
Departamento de Meteorologia Agrícola - DEACel: (31) 9978 2522 DEA: (31) 3899 1890
From: maria.gehne@noaa.gov
Date: Tue, 22 Jul 2014 17:57:58 -0600
Subject: Re: [ncl-talk] question about satellite data
To: vanucia-schumacher@hotmail.com
CC: ncl-talk@ucar.edu
The SST data type in the file is short, you need to convert to float to get values in the actual range. When you read the data try
f = addfile(filename,"r")sst = short2flt(f->sst)
printMinMax(sst,1)
This should give you the values you want. The function short2flt uses the attributes scale_factor and add_offset associated with the variable to convert to float.
Maria
On Tue, Jul 22, 2014 at 5:50 PM, Vanúcia Schumacher <vanucia-schumacher@hotmail.com> wrote:
I would like to plot the values corresponding to these data (sst:actual_range = -1.8f, 35.31f ;), but when I plot the variable sst, plotting the range (sst:valid_range = -500s, 4000s ;
), why?How can I plot the range I need? -1.8 to 35.31
netcdf sst.mnmean {dimensions:
lat = 180 ; lon = 360 ; time = UNLIMITED ; // (391 currently)
nbnds = 2 ;variables: float lat(lat) ;
lat:units = "degrees_north" ; lat:long_name = "Latitude" ;
lat:actual_range = 89.5f, -89.5f ; lat:standard_name = "latitude" ;
lat:axis = "Y" ; lat:coordinate_defines = "center" ;
float lon(lon) ; lon:units = "degrees_east" ;
lon:long_name = "Longitude" ; lon:actual_range = 0.5f, 359.5f ;
lon:standard_name = "longitude" ; lon:axis = "X" ;
lon:coordinate_defines = "center" ; short sst(time, lat, lon) ;
sst:long_name = "Monthly Mean of Sea Surface Temperature" ; sst:unpacked_valid_range = -5.f, 40.f ;
sst:actual_range = -1.8f, 35.31f ; sst:units = "degC" ;
sst:add_offset = 0.f ; sst:scale_factor = 0.01f ;
sst:missing_value = 32767s ; sst:precision = 2s ;
sst:least_significant_digit = 2s ; sst:var_desc = "Sea Surface Temperature" ;
sst:dataset = "NOAA Optimum Interpolation (OI) SST V2" ; sst:level_desc = "Surface" ;
sst:statistic = "Mean" ; sst:parent_stat = "Weekly Mean" ;
sst:standard_name = "sea_surface_temperature" ; sst:cell_methods = "time: mean (monthly from weekly values interpolated to daily)" ;
sst:valid_range = -500s, 4000s ; double time(time) ;
time:units = "days since 1800-1-1 00:00:00" ; time:long_name = "Time" ;
time:actual_range = 66443., 78313. ; time:delta_t = "0000-01-00 00:00:00" ;
time:avg_period = "0000-01-00 00:00:00" ; time:prev_avg_period = "0000-00-07 00:00:00" ;
time:standard_name = "time" ; time:axis = "T" ;
time:bounds = "time_bnds" ; double time_bnds(time, nbnds) ;
time_bnds:long_name = "Time Boundaries" ;
// global attributes:
:title = "NOAA Optimum Interpolation (OI) SST V2" ; :Conventions = "CF-1.0" ;
:history = "Wed Apr 6 13:47:45 2005: ncks -d time,0,278 SAVEs/sst.mnmean.nc sst.mnmean.nc\n",
"Created 10/2002 by RHS" ; :comments = "Data described in Reynolds, R.W., N.A. Rayner, T.M.\n",
"Smith, D.C. Stokes, and W. Wang, 2002: An Improved In Situ and Satellite\n", "SST Analysis for Climate, J. Climate" ;
:platform = "Model" ; :source = "NCEP Climate Modeling Branch" ;
:institution = "National Centers for Environmental Prediction" ; :references = "http://www.esrl.noaa.gov/psd/data/gridded/data.noaa.oisst.v2.html\n",
"http://www.emc.ncep.noaa.gov/research/cmb/sst_analysis/" ;
}
---Vanúcia Schumacher
Mestranda em Meteorologia - UFVMeteorologista -UFPel
Departamento de Meteorologia Agrícola - DEA
Cel: (31) 9978 2522
DEA: (31) 3899 1890
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Received on Wed Jul 23 12:03:43 2014
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