[CF-metadata] CF and a representation of probalistic forecasts

From: Karl Taylor <taylor13>
Date: Wed, 07 Feb 2007 09:16:21 -0800

Hi Jamie, Jonathan, and all,

Concerning realization weights and pdf's, Jamie wrote:

> This is clearly a special handling of a fifth dimension: how do we
> expect applications that are CF1.0 compliant to support the addition of
> the standard names 'realization' and 'realization_weight'? Should they
> treat them as special standard names (as latitude, longitude and
> vertical coordinate types are in spatially referencing the data)? In
> this case this dimension is special in that it allows you to calculate
> statistics across the realizations. (In that sense 'realization_weight'
> is a little bit like a cell measure - though I'm not sure we'd want to
> go this way 'realization' doesn't really have a scale/units).

I find the idea of using the cell_measure attribute to point to the
'realization_weight' quite natural and attractive. There is little
difference in my mind between "area-weighted" means and
"realization-weighted" or "sample-weighted" means. Perhaps the only
drawback is if you wanted to define several different sets of
"realization" or "sample" weights for a single variable. I suspect this
problem would be rare, but I stand ready to be corrected on this point.

Best regards,
Karl
Received on Wed Feb 07 2007 - 10:16:21 GMT