Re: [ferret_users] ERA5 only shows up as a time-series

[Ansley Manke - NOAA Affiliate <ansley.b.manke@xxxxxxxx>]

Hi Alexander,

I believe this is because of the variable namse in the file. "T" is a reserved name in Ferret/PyFerret, referring to coordiantes in the T direction. This means thats SHOW GRID T is interpreted as asking about the "abstract" T axis, a pre-defined general axis in the T direction.

When there are conflicts like this ,you can refer to the file variable T by enclosing it in single quotes, 'T'

Here's the documentation abou this:

../../documentation/users-guide/variables-xpressions/VARIABLES#_VPINDEXENTRY_filevars

One thing you might do is to rename the variable in the Ferret session:

../../documentation/users-guide/commands-reference/SET.html#_VPINDEXENTRY_1759

So you might do something like this, with a name that makes sense for the data

yes? use era_T_W_A1.nc

yes? set variable/name=temperature 'T'

Then within the session, refer to temperature instead of T.

Ansley

On Sun, Dec 29, 2019 at 8:02 AM Alexander Audet <alexander.c.audet@xxxxxxxxx> wrote:

Hello,

I recently tried downloading and using portions of ERA5. However, it appears that ferret only recognizes ERA5 as a time series instead of as 4D data.

I have experimented a little bit withshow gridand evensetting a grid. This has revealed that while Showing the data suggests that there is data in 4 dimensions, showing the grid for one of the data variables shows that the grid is abstract and entirely in the T dimension.

Setting a grid thenuse(ing) the dataset seems to give it a grid structure, but when I try tolista subset of the dataset (doesn't allow me to list the whole dataset) the Lat-Long coordinatespaces on the grid don't seem to have data (the data points listed seem to only be listed with time).

I both tried downloading directly from the Copernicus Climate Data Store and importing the data into my Windows 10 bash Ubuntu whichcreated a file with a .nc extension, and downloadingthe data using cdsapi([ferret_users] ERA5 only shows up as a time-series

• From: Alexander Audet

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