[CF-metadata] WRF staggered grids

From: John Caron <caron>
Date: Tue, 21 Oct 2003 13:18:41 -0600

Has there been any discusion of staggered coordinate systems? Im looking
at the WRF model output to recomend how to convert it to using CF. It
has variables on various staggerings, for example U is on (z,y,x_stag)
while V is on (z, y_stag, x), and W is on (z_stag,y,x), where the
staggered coordinates are the "edges" of the non-staggered coordinates.

On first pass these could constitute seperate coordinate systems, but it
seems like it would be better to represent how they are related.

Also, WRF outputs two fields whoch if you add together, gives you the
pressure field on the non-staggered grid. To get a pressure coordinate
on the staggered grids, one has to interpolate. One could express all
that as a formula, as we do other vertical coordinate systems, but it
seems a little clumsy.

Any thoughts in general, or specifics from anyone familiar with the WRF
model?
Received on Tue Oct 21 2003 - 13:18:41 BST