Antwort: [CF-metadata] standard name proposals

[Burkhardt.Rockel at gkss.de]

Dear Jonathan,

Irradiance is defined as "Radiant flux of any origin INCIDENT onto an area 
element".
Radiant flux density is defined as "Radiant flux of any origin  CROSSING 
an area element".
Both have units W m-2.

Regards
Burkhardt






Jonathan Gregory <j.m.gregory at reading.ac.uk>
Gesendet von: cf-metadata-bounces at cgd.ucar.edu
26.08.2003 09:10
 
        An:     cf-metadata at cgd.ucar.edu
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        Thema:  [CF-metadata] standard name proposals

Dear John

> As little as I understand it, isn't radiative flux actually just in 
units of 
> Watts, while irradiance takes the "per unit area" into account?
Ah. Yes, another complication is that what we refer to as "flux" in the
standard names is actually "flux density" in physics terms i.e. W m-2. We 
had
quite a lot of discussion about this and it was thought we should take 
this
approach because "flux" almost universally means something m-2 in atmos 
and
ocean modelling at least. 

So I should rephrase my question. Is there any difference between 
irradiance
and radiative flux density?

Cheers

Jonathan
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