Antwort: Re: [CF-metadata] snow temperature

[Burkhardt.Rockel at gkss.de]

Karl, thank you for the prompt reply.

> If you have a 
> grid-cell (or a larger region) over which you want to characterize a 
> snow surface temperature, distinct from the temperature of the snow-free 

>   portion, then we do indeed need a new name.

exactly that is why I proposed the name. 
I constructed it similar to already existing standard names, for example:

"surface_snow_thickness_where_sea_ice 
The surface called "surface" means the lower boundary of the atmosphere; 
over sea areas this is taken to be mean sea level. Unless indicated, a 
quantity is assumed to apply to the whole area of each horizontal grid 
box. The qualifier where_type specifies instead that the quantity applies 
only to the part of the grid box of the named type."

Regards,
Burkhardt


Karl Taylor <taylor13 at llnl.gov> schrieb am 27.01.2006 17:58:10:

> Dear all,
> 
> Actually, the standard name "surface_temperature" refers, I believe, to 
> the "skin" temperature at the interface between the atmosphere, and 
> whatever solid or liquid surface underlies it (i.e., sea ice, ocean, 
> snow, glacial ice, bare land, vegetated land, etc), so 
> surface_temperature and surface_temperature_where_snow would be 
> identical if an entire region were snow covered.  If you have a 
> grid-cell (or a larger region) over which you want to characterize a 
> snow surface temperature, distinct from the temperature of the snow-free 

>   portion, then we do indeed need a new name.
> 
> I note that we define sea_surface_temperature, so that we can 
> characterize ocean surface temperature distinct from surface temperature 

> where there is seaice or land.   Actually, I am not absolutely sure 
> whether sea_surface_temperature should be an average of the surface 
> temperature of the ocean only in areas where it is in direct contact 
> with the atmosphere, or if the surface of the ocean under sea ice 
> (presumably at the freezing point) should also contribute. I would vote 
> for the first definition.
> 
> regards,
> Karl
> 
> Burkhardt.Rockel at gkss.de wrote:
> > 
> > Dear All,
> > 
> > I need to define the surface temperature (i.e. the temperature at the 
> > interface between snow and atmosphere, this is NOT the bulk snow 
> > temperature) for the part of the model grid box covered by snow.
> > I propose a the following standard name for it:
> > 
> > surface_temperature_where_snow (K)
> > 
> > is this ok?
> > 
> > Regards
> > Burkhardt
> > 
> > 
> > 
> > 
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