[CF-metadata] change_in

[Burkhardt.Rockel at gkss.de]

Dear Jonathan,

I understand your concerns about the possible miss use of "change_in ...". 
 The restriction should be made clear at least in the explanation in the 
standard name table.

Thank you for your help.

Regards
Burkhardt



cf-metadata-bounces at cgd.ucar.edu schrieb am 19.03.2006 17:29:45:

> Dear Burkhardt
> 
> > is there any news or any decision on the "change_in_" issue?
> No-one expressed any view.
> 
> Having thought about it a bit more, I think change_in_ is OK if it has 
the
> same kind of uses as tendency_of. They are really the same except 
change_in
> is extensive in time and tendency_of is intensive. They have the same 
bounds
> in time. The units of tendency_of are X s-1 if change_in has units X. We 
must
> be clear that change_in should *not* be used to describe every 
> possible kind of
> difference e.g. between locations or climates. It specifically meansthe 
change
> in a quantity as a function of time. Do you agree?
> 
> Hence let us propose
> change_in_atmospheric_water_content_due_to_advection (kg m-2)
> 
> Best wishes
> 
> Jonathan
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