Jonathan:
Answering your questions?
(1)
clear_sky instead of clear is fine.
(2)
super_cooled_liquid_water is a subset of liquid_water.
Thus, the definition you have suggested for:
standard_name: cloud_phase_category
with definition:
The variable is a string, taking one of the following values to indicate
cloud phase category: clear_sky, liquid_water, super_cooled_liquid_water,
mixed_phase, ice, unknown. For a data variable it is encoded as an integer
using flag_values and flag_meanings.
is fine.
very respectfully,
randy
On Apr 19, 2013, at 8:22 AM, Jonathan Gregory wrote:
> Dear Randy
>
>> We are planning on using flags with numeric values as you suggest Your input is helpful in that is is deemed unnecessary to specifically identify values in the definition as is the case with the binary_masks, This provides additional flexibility to data producers.
>
> Yes, exactly.
>
>> standard_name: cloud_phase_category
>>
>> definition:
>>
>> A numeric value indicating one of the following categories: clear; liquid water; super-cooled liquid water; mixed phase; ice, and; unknown.
>
> But it would be a string-valued quantity in principle, although netCDF does not
> allow string-valued data variables. I think the definition should say
>
> The variable is a string, taking one of the following values to indicate
> cloud phase category: clear_sky, liquid_water, super_cooled_liquid_water,
> mixed_phase, ice, unknown. For a data variable it is encoded as an integer
> using flag_values and flag_meanings.
>
> Comments on the values:
>
> * clear_sky is a phrase already used in standard names. Could you use it
> here for consistency?
>
> * Is super_cooled_liquid_water a subset of liquid_water? If not, could you
> give an extra adjective to liquid_water to clarify this?
>
> Cheers
>
> Jonathan
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____________________________________
Randy C. Horne (rhorne at excaliburlabs.com)
Principal Engineer, Excalibur Laboratories Inc.
voice & fax: (321) 952.5100
url:
http://www.excaliburlabs.com
Received on Fri Apr 19 2013 - 17:13:37 BST
