Dear Alejandro,
after reading your mail, I was surprised to realise that
aerosol_single_scattering_albedo in fact hadn't been defined yet.
However, the definition you propose seems to me rather unusual. You define the
single scattering albedo with respect to a single particle as ratio of
cross-sections, i.e. as truly microscale property. From the multitude of
particles contained in an aerosol, how do you determine which particle you refer to?
>From my experience, it's more usual to define the single scattering albedo as
ratio of scattering and extinction coefficient of a particle population, i.e. an
effective property for the ensemble of particles contained in the aerosol. How
about this:
Definition: Fraction of radiation in an incident light beam interacting with the
particles of an aerosol reference volume and scattered by these particles as a
function of wavelength. It is the ratio of the scattering and the extinction
coefficients of the aerosol particles in the reference volume. A coordinate of
radiation_wavelength or radiation_frequency should be included to specify either
the wavelength or frequency.
Having said that, should we also consider to include the humidity state of the
aerosol? That would require relative_humidity as additional coordinate variable.
Best regards,
Markus
Am 19.01.2016 um 10:47 schrieb Bodas-Salcedo, Alejandro:
> Dear All,
>
> I'd like to propose a new standard name, which as far as I can see doesn't currently exist in the CF table:
>
> Name: aerosol_single_scattering_albedo
> Units: 1
> Description: Fraction of radiation scattered out of a pencil of radiation after one encounter with an aerosol particle for a given wavelength. It is the ratio between the scattering cross-section and the extinction cross-section. A coordinate of radiation_wavelength or radiation_frequency should be included to specify either the wavelength or frequency.
>
>
> Thanks,
>
> Alejandro
>
--
Dr. Markus Fiebig
Senior Scientist
Dept. Atmospheric and Climate Research (ATMOS)
Norwegian Institute for Air Research (NILU)
P.O. Box 100
N-2027 Kjeller
Norway
Tel.: +47 6389-8235
Fax : +47 6389-8050
e-mail: Markus.Fiebig at nilu.no
skype: markus.fiebig
P Please consider the environment before printing this email and attachments
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Received on Tue Jan 19 2016 - 05:49:20 GMT
