Re: question about convert ECMWFds117.0 data into fix grid data

From: Dennis Shea <shea_at_nyahnyahspammersnyahnyah>
Date: Wed, 19 Jul 2006 21:11:36 -0600 (MDT)

Dave Stepaniak can comment on the ERA40 vertical integrals.

However, a person came to my office just yesterday questions
the correctness of ERA40's vertical integrals.

NCL can interpolate to any linint2 [linint2_Wrap]

> Thank you very much for your reply. The reason using ds117.0 is that
> ds118.0 does not give vertical integrals data. Following Francois's question,
> I am wondering how high-resolution of the regular grid the ERA ds117* data
> can be converted to in NCL?
> Thanks,
> yinghui
> Dennis Shea wrote:
>>> I am trying to convert the ECMWFds117.0 data to 2.5*2.5 degree data.
>>> I am using the NCL g2fsh function to do that. The problem is that
>>> ECMWFds117.0 data is in reduced N80 Gaussian grid, which need
>>> to be converted to regular N80 Gaussian grid first, I guess. Does anyone
>>> know a way to convert the reduced N80 Gaussian grid to regular N80
>>> Gaussian grid in NCL?
>>> _______________________________________________
>> [1] NCL *automatically* converts the data to a regular N80 Gaussian
>> grid. NCL uses an ECMWF
>> supplied code to do this.
>> [2] Why not use ds118.0? It is already on a 2.5 x 2.5 grid
>> ERA40 2.5 Degree Latitude-Longitude Gridded Surface and
>> Single Level Analysis from ECMWF
>> [3] If you want to convert from GRIB to netCDF use NCL's
>> ncl_grib2nc ... a command line operator.
>> good luck
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Received on Wed Jul 19 2006 - 21:11:36 MDT

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