Re: ECMWF operational analysis (2)

From: Dennis Shea <shea_at_nyahnyahspammersnyahnyah>
Date: Mon Apr 07 2014 - 11:02:37 MDT

http://www.ncl.ucar.edu/Applications/

Under 'Data Analysis'

Click: Complex Coefficients (GRIB)

http://www.ncl.ucar.edu/Applications/wind.shtml

Divergent and Rotational Wind Components

add them to get 'total wind'

On 4/6/14, 8:37 AM, sk wrote:
> Hi,
> This is an old thread but unfortunate all the link in the previous one doesn't work anymore. So i want to reconstruct wind field from spherical harmonics coefficients and would like to see some ncl working examples.
> BTW maybe it will be easier to download post processed ECMWF operational analysis dataset on the regular 0.225x0.225 grid instead working with the original dataset?
>
>
>
> u_g = a->U_GDS50_ISBL(k,:,:,:)
> print(u_g)
>
>
> Variable: u_g
> Type: float
> Total Size: 5120000 bytes
> 1280000 values
> Number of Dimensions: 3
> Dimensions and sizes: [real_imaginary | 2] x [g50_lat_4 | 800] x [g50_lon_5 | 800]
> Coordinates:
> Number Of Attributes: 12
> initial_time0_hours : 1817184
> center : European Center for Medium-Range Weather Forecasts (RSMC)
> long_name : U velocity
> units : m s**-1
> _FillValue : 1e+20
> level_indicator : 100
> gds_grid_type : 50
> parameter_table_version : 128
> parameter_number : 131
> level : 200
> forecast_time : 0
> forecast_time_units : hours
>
>
> Thank you!!
> sk
>
>
>
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Received on Mon Apr 07 11:02:45 2014

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