Hi all,
Thanks a lot for your feedback.
I think Roy's "4-steps" work plan is a great idea to keep things
manageable. Thanks Roy!
We, Marta and I, agree with your suggestions Roy and Jonathan.
So, to summarize, for height parameters, we have:
- *sea_surface_wave_significant_height*
Wave height is defined as the distance from a wave trough to the following wave crest. Significant wave height is a statistic computed from wave measurements collected during an
observation period that approximates to the wave height that would be recorded visually by a human observer during that observation period.
- *sea_surface_wave_maximum_height *
Wave height is defined as the distance from a wave trough to the
following wave crest. The maximum wave height is the greatest trough to
crest distance measured during the observation period.
- *sea_surface_wave_mean_height *
Wave height is defined as the distance from a wave trough to the
following wave crest. The average wave height is the average trough to
crest distance measured during the observation period.
- *sea_surface_wave_mean_height_of_highest_tenth*
Wave height is defined as the distance from a wave trough to the
following wave crest. The height of the highest tenth is defined as the
average of the highest ten per cent of trough to crest distances
measured during the observation period.
- *sea_surface_wave_maximum_crest_height*
The crest is the highest point of a wave. Crest height is the distance
between the crest and the calm sea surface. Maximum crest height is the
maximum value measured during the observation period.
- *sea_surface_wave_maximum_trough_depth*
The trough is the lowest point of a wave. Trough depth is the distance
between the trough and the calm sea surface. Maximum trough depth is the
maximum value measured during the observation period.
- *sea_surface_wind_wave_significant_height*
definition of "sea_surface_wave_significant_height" + Wind waves are the high frequency portion of a bimodal wave frequency spectrum.
- *sea_surface_swell_wave_significant_height*
definition of "sea_surface_wave_significant_height" + Swell waves are the low frequency portion of a bimodal wave frequency spectrum.
- *sea_surface_primary_swell_wave_significant_height*
definition of "sea_surface_wave_significant_height" + The primary swell
wave is the most energetic wave in the low frequency portion of a
bimodal wave frequency spectrum.
- *sea_surface_secondary_swell_significant_height*
definition of "sea_surface_wave_significant_height" + The secondary
swell wave is the second most energetic wave in the low frequency
portion of a bimodal wave frequency spectrum.
Cheers,
Elodie
On 04/05/2016 15:14, Lowry, Roy K. wrote:
> Dear Jonathan,
>
> Many thanks for your constructive response. As always your Standard Name grammar is more precise than mine and so I am happy with your suggestions providing Elodie and her colleagues have no problems.
>
> Cheers, Roy.
>
> -----Original Message-----
> From: CF-metadata [mailto:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of Jonathan Gregory
> Sent: 04 May 2016 14:05
> To: cf-metadata at cgd.ucar.edu
> Subject: Re: [CF-metadata] Waves
>
> Dear Roy
>
> Thanks for redefining "wave height". That helps me understand!
>
>> - sea_surface_wave_average_height
> Could this be "mean" instead of "average"?
>
>> - sea_surface_wave_height_of_highest_tenth
> Given the definition, shouldn't this be
> sea_surface_wave_mean_height_of_highest_tenth
>
>> - sea_surface_wave_height_of_the_highest_crest
>> - sea_surface_wave_deepest_trough
> The definitions of these are symmetrical but the names aren't. For symmetry and consistency with other names, I'd suggest sea_surface_wave_maximum_crest_height
> sea_surface_wave_maximum_trough_depth
> thus avoiding "wave height", because it's not a wave height in your new definition.
>
> It is not unprecedented for "mean" and "maximum" to appear in standard names.
> I understand why you prefer to do it this way, although using cell_methods seems preferable to me. For significant wave height and mean of highest tenth we would need new cell_methods, which aren't needed elsewhere, so the argument is less strong for me in those cases.
>
> Best wishes
>
> Jonathan
> _______________________________________________
> CF-metadata mailing list
> CF-metadata at cgd.ucar.edu
> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
> ________________________________
> This message (and any attachments) is for the recipient only. NERC is subject to the Freedom of Information Act 2000 and the contents of this email and any reply you make may be disclosed by NERC unless it is exempt from release under the Act. Any material supplied to NERC may be stored in an electronic records management system.
> ________________________________
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <
http://mailman.cgd.ucar.edu/pipermail/cf-metadata/attachments/20160504/e71d6101/attachment-0001.html>
Received on Wed May 04 2016 - 08:16:39 BST
