[ncl-talk] Error in "cremapbin": Could not map global lat array into grid array.

[Dennis Shea]

Bonjour Adriana,

The *area_conserve_remap *and *area_conserve_remap_Wrap* have been
*deprecated*.
The* ESMF regrid* <http://www.ncl.ucar.edu/Applications/ESMF.shtml> library
is the recommended replacement. It uses a superior methodology.

The *source* and *destination* grids are both *rectilinear*.

I modified one of the rectilinear-to-rectilinear grid examples.

Attached is a sample script that uses ESMF conservative remapping. It
creates:

[1] An ESMF weight file that can be used on subsequent regrid variables.
[2] A netCDF file containing the regridded emissions variable.
[3] A panel plot showing the source and regridded variables at an arbitrary
level and time.
     NOTE: Volcano emission(s) are point source(s) so the plots won't show
much.

You can copy and modify the attached file to interpolate (regrid) to
different resolutions.

====

*%>* ncl adriana.esmf_regrid_1.ncl

Cheers
D

On Thu, Feb 28, 2019 at 8:05 AM <adriana.bossolasco at cnrs-orleans.fr> wrote:

> Hi all!
>
> I write because I don't understand what happen now with my regridding. I
> am trying to regrid an emission file from 0.9x1.9 lat/lon to a grid
> 1.9x2.5 lat/lon.
> I did with successful before, but now I have a file with more verticals
> levels and doesn't work and I get the following Error message:
>
> Error in "cremapbin":
> Could not map global lat array into grid array
> Aborted (core dumped)
>
> I will copy part of my code:
>
>
> ;*************************************************************
> ; read
> ;*************************************************************
>
>      srcFileName    =
> "emissions-cmip6_so4_a1_contvolcano_vertical_2000-2015.nc"
>     f     = addfile(srcFileName, "r")
>
>     x     = f->emiss_volcanoes
>
>     printVarSummary(x)
>     printMinMax(x, True)
> ;*************************************************************
> ; get dimension sizes and other information
> ;*************************************************************
>    dimx  = dimsizes( x )
>     ntim  = dimx( 0 )
>     nlev =  dimx( 1 )
>     nlat  = dimx( 2 )                 ;    [0.9 x 1.9 ]
>     mlon  = dimx( 3 )                 ;
>
>     latS  = x&lat(0)                  ; south extent of input grid
>     latN  = x&lat(nlat-1)             ; north extent
>
>    dimx  = dimsizes( x )
>     ntim  = dimx( 0 )
>     nlev =  dimx( 1 )
>     nlat  = dimx( 2 )                 ;
>     mlon  = dimx( 3 )                 ;
>
>     latS  = x&lat(0)                  ; south extent of input grid
>     latN  = x&lat(nlat-1)             ; north extent
>
>
>     nlati = 192                     ; global extent of input grid
> [180/0.5]
>
> ;*************************************************************
> ; perform conservative remapping to two different grid resolutions
> ;*************************************************************
>
>     opt = True
>
>
> ;  ---
>     NLAT25x19=  96                              ; RES   = "2.5x1.9"
>     MLON25x19= 144
>     LAT25x19 = latGau    (NLAT25x19, "lat", "latitude" , "degrees_north")
>     LON25x19 = lonGlobeFo(MLON25x19, "lon", "longitude", "degrees_east" )
>
>     opt at NLATo = NLAT25x19
>     LAT_REG25x19= LAT25x19({latS:latN})
>     X25x19   = area_conserve_remap_Wrap (x&lon, x&lat, x ,LON25x19,
> LAT_REG25x19, opt)
>
>
>
>     printVarSummary(X25x19)
>     printMinMax(X25x19, True)
>
>
> And I get this Summary of my variables
>
> Variable: x
> Type: float
> Total Size: 1274019840 bytes
>              318504960 values
> Number of Dimensions: 4
> Dimensions and sizes:   [time | 192] x [altitude | 30] x [lat | 192] x
> [lon | 288]
> Coordinates:
>              time: [91325..97138]
>              altitude: [0.125..7.375]
>              lat: [-90..90]
>              lon: [ 0..358.75]
> Number Of Attributes: 3
>    units :      molecules/cm3/s
>    long_name :  Continuously outgassing volcano SO4 = (0.025*SO2)*0.5
> emissions
>    molecular_weight :   115
> (0)
> (0)     Continuously outgassing volcano SO4 = (0.025*SO2)*0.5 emissions
> (molecules/cm3/s) : min=0   max=2.19543e+06
>
>
> Variable: latS
> Type: float
> Total Size: 4 bytes
>              1 values
> Number of Dimensions: 1
> Dimensions and sizes:   [1]
> Coordinates:
> Number Of Attributes: 2
>    units :      degrees_north
>    long_name :  Latitude
> (0)     -90
>
>
> Variable: latN
> Type: float
> Total Size: 4 bytes
>              1 values
> Number of Dimensions: 1
> Dimensions and sizes:   [1]
> Coordinates:
> Number Of Attributes: 2
>    units :      degrees_north
>    long_name :  Latitude
> (0)     90
>   Error in "cremapbin":
>   Could not map global lat array into grid array
> Aborted (core dumped)
>
>
>
> I really appreciate any help. I tried a lot of things but nothing work.
>
> For the other hand I run the same code for other file and works. The
> other file have 8 altitude levels and this 30. So I was thinking maybe
> is to big the file, but I try to select just two o three levels and I
> get the same error.
>
> Thanks
>
> Adriana
> --
> Adriana Bossolasco
> LPC2E UMR 7328 (CNRS, Université d'Orléans)
> 3A avenue de la Recherche Scientifique
> 45071 Orléans Cedex 2 - FRANCE
> Tel  +33 (0)2 38 25 52 85
> e-mail: adriana.bossolasco at cnrs-orleans.fr
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