Dear Maarten and Jonathan,
Maarten has reminded me that the following names were discussed a few weeks ago:
- platform_zenith_angle (degree): "Platform zenith angle is the the angle between the line of sight to the platform and the local vertical";
- angle_of_rotation_from_solar_azimuth_to_platform_azimuth (degree):
"The angle of rotation between the solar azimuth angle and the platform azimuth angle";
- thickness_of_liquid_water_cloud (m): "Cloud thickness (cloud top height minus cloud base)";
- effective_radius_of_cloud_condensed_water_particles_at_cloud_top (m):
"Particle effective radius for both liquid and ice water particles";
- thermodynamic_phase_of_cloud_water_particles_at_cloud_top (status_flag liquid, ice and mixed): "The thermodynamic phase of particles at the top of the cloud";
- thermodynamic_phase_of_cloud_water_particles_at_cloud_top_defined_by_infrared_radiance
(status_flag liquid, ice and mixed): "The thermodynamic phase of particles at the top of the cloud derived by using infrared radiances";
- thermodynamic_phase_of_cloud_water_particles_at_cloud_top_defined_by_near_infrared_radiance
(status_flag liquid, ice and mixed):" The thermodynamic phase of particles at the top of the cloud derived by using near-infrared radiances".
I think these names all follow the pattern of existing names and their meanings are generally clear. One question - in your products, are 'infrared' and 'near_infrared' separate ranges of wavelengths/frequencies? Please could you tell me the ranges so that I can include at least indicative values in the explanations of the names. For the three status flag names, I suggest that the units should be '1', i.e. a dimensionless value, assuming that the variables will be accompanied by flag_values and flag_meanings attributes. If we can clarify these points then I think the names can be accepted for inclusion in the standard name table.
Best wishes,
Alison
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Alison Pamment Tel: +44 1235 778065
NCAS/British Atmospheric Data Centre Fax: +44 1235 446314
STFC Rutherford Appleton Laboratory Email: alison.pamment at stfc.ac.uk
R25, 2.22
Harwell Oxford, Didcot, OX11 0QX, U.K.
From: cf-metadata-bounces at cgd.ucar.edu [mailto:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of Maarten Plieger
Sent: 30 November 2010 16:49
To: Jonathan Gregory
Cc: cf-metadata at cgd.ucar.edu
Subject: Re: [CF-metadata] MSG Cloud physical properties codification
Dear Jonathan,
Good point. That is OK with us, off course. Thanks again!
Regards, Maarten
Jonathan Gregory schreef:
Dear Maarten
Yesterday I didn't notice that these don't have _radiance on the end. I think
that would make them clearer, if OK with you.
thermodynamic_phase_of_cloud_water_particles_at_cloud_top_defined_by_infrared
thermodynamic_phase_of_cloud_water_particles_at_cloud_top_defined_by_near_infrared
When everybody agrees with these standard names, units and descriptions:
what would be the next step?
Alison will consider them. She is responsible for moderating discussions and
updating the standard name table with agreed additions.
Best wishes
Jonathan
--
Maarten Plieger
KNMI, R&D Information and Observation Technology, De Bilt
(t) +31 30 2206330
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Received on Mon Jan 24 2011 - 07:03:04 GMT
