Hi Jonathan,
> OK, I see there could be a distinction between in_air and in_cloudy_air.
and in_clouds or in_snow etc...
> Do you need the "ambient"?
I think I do need the ambient, because it could also be given at a
certain rel. hum.
>You draw a distinction with "dry aerosol", > but you wouldn't find
"dry >aerosol" in air.
Yes I would: in the model world.
> Doesn't "dry aerosol" mean you have
> collected and dried it, and that the water mass fraction is zero?
>
This is the meaning in the real world.
> If aerosol particles are in cloud water or in precipitation, are they
still "ambient" aerosol? Do they still have a meaningful mass fraction
of water?
This distinction would not make sense anymore. It could be dry or
ambient aerosol in air, or aerosol at a certain rel. humidity in air. Or
they could be contained another phase like clouds or precip, but not at
the same time in air.
Cheers,
Christiane
Jonathan Gregory a ?crit :
> Dear Christiane
>
>
>>>>mass_fraction_of_water_in_ambient_aerosol_in_air
>>>
>>>isn't an aerosol by definition in air?
>>
>>Aerosol particles can be within hydrometeors (cloud, precip, ice...), so
>>I would like to keep the in_air extension.
>
>
> OK, I see there could be a distinction between in_air and in_cloudy_air.
>
> Do you need the "ambient"? You draw a distinction with "dry aerosol", but you
> wouldn't find "dry aerosol" in air. Doesn't "dry aerosol" mean you have
> collected and dried it, and that the water mass fraction is zero?
>
> If aerosol particles are in cloud water or in precipitation, are they still
> "ambient" aerosol? Do they still have a meaningful mass fraction of water?
>
> Thanks for continuing the discussion. Cheers
>
> Jonathan
> _______________________________________________
> CF-metadata mailing list
> CF-metadata at cgd.ucar.edu
> http://www.cgd.ucar.edu/mailman/listinfo/cf-metadata
--
Christiane Textor
GMES France Atmosph?re - GEMS France
Service d'A?ronomie INSU CNRS, Tour 46, RDC # 2
Universit? Pierre et Marie Curie, Boite 102
4 place Jussieu
75252 Paris C?dex 05
France
Tel: ++33 1.44.27.21.82
Fax: ++33 1.44.27.21.81
Email: christiane.textor at aero.jussieu.fr
Received on Tue Nov 14 2006 - 09:48:48 GMT
