Re: Arpege grid

Dear Siji,

I have an example that I will put on the NCL Applications page later
this morning. I need to reacquaint myself with it and clean it up a
bit.

--Mary

On Wed, 23 Aug 2006, Sijikumar S wrote:

> Hi,
> Anybody willing to share an example script to open Arpege grid data (
> http://www.ncl.ucar.edu/Document/Graphics/contour_grids.shtml#Arpege) and
> regrid into regular lat/lon. A sample nc header is given below.
> Thanks
> siji
>
> netcdf zg_6h_19991201_19991231_3D {
> dimensions:
> nb_points = 21692 ;
> gaussian_grid = 1 ;
> lat_circle = 120 ;
> time = UNLIMITED ; // (124 currently)
> plev = 16 ;
> variables:
> int plev(plev) ;
> plev:standard_name = "Air pressure" ;
> plev:units = "hPa" ;
> double lon(gaussian_grid, nb_points) ;
> lon:standard_name = "longitude" ;
> lon:units = "degrees_east" ;
> double lat(gaussian_grid, nb_points) ;
> lat:standard_name = "latitude" ;
> lat:units = "degrees_north" ;
> int mask(gaussian_grid, nb_points) ;
> mask:standard_name = "Land/Sea mask" ;
> mask:units = "1 for land, 0 for ocean" ;
> double orog(gaussian_grid, nb_points) ;
> orog:standard_name = "surface_altitude" ;
> orog:units = "m" ;
> int nlon(lat_circle) ;
> nlon:standard_name = "number of longitudes" ;
> int time(time) ;
> time:axis = "t" ;
> time:calendar = "gregorian" ;
> time:standard_name = "Time axis" ;
> time:time_origin = "1999-11-01 12:00:00" ;
> time:units = "hours since 1999-11-01 12:00:00" ;
> int date(time) ;
> date:standard_name = "current date (YYYYMMDD)" ;
> int datesec(time) ;
> datesec:standard_name = "current seconds of current date" ;
> float zg(time, plev, gaussian_grid, nb_points) ;
> zg:standard_name = "Geopotential height" ;
> zg:units = "m" ;
> zg:vairmer_name = "PLGEO000" ;
>
> // global attributes:
> :title = "SAFO output" ;
> :history = "Creation date : 2006-08-12 20:54:00" ;
> :subtitle = "Cerfacs Netcdf conversion" ;
> :Conventions = "CF-1.0" ;
> :institution = "Meteo-France" ;
> :source = "Arpege Climat" ;
> :contact = "Global Change Team (Cerfacs)" ;
> :reference = "Deque, M., C. Dreveton, A. Braun and D.
> Cariolle, 1994: the climate version of Arpege/IFS : a contribution to the
> french community climate modelling. Climate Dyn., 10, 249-266." ;
> :troncature = 106 ;
> :grid_type = 2 ;
> :pole_longitude = 0.209f ;
> :pole_sine_latitude = 0.643f ;
> :stretch_factor = 3.f ;
> :regular_longitude_nb = 240 ;
> :model_levels = 31 ;
> }
>
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Received on Wed Aug 23 2006 - 10:24:07 MDT