Hi Eric and CF metadata list and Ocean-Sites List,
Firstly sorry for any double postings.
Yes, I agree there are probably some more sea surface
wave data parameters that could be added to the CF standard names
list. I my case I had 13 different wave data parameters from MHL-NSW-Australia
that came off a Datawell model wave rider buoy plus wave direction from
directional
equipped buoys. The data parameters came off zero crossing anaysis and spectral
analysis
of wave data recordings. Attached is a extract of the wave data analysis methods
provided by Mark Kulmar of MHL, thanks Mark!
4 of these wave data parameters were already on the CF list and 9 needed new
names
as proposed. Of those new names 4 would by covered by a common concept
name 'sea_surface_wave_height' plus a cell method as detailed below.
Just for record I will list what those proposed parameters are so its
very clear about any new parameter names that the community (OceanSites)
wanted to add to the CF list.
They were:
used already (4 std CF names)
sea_surface_wave_significant_height
sea_surface_wave_period_at_variance_spectral_density_maximum
sea_surface_wave_from_direction
sea_surface_wave_zero_upcrossing_period
proposed (6)
sea_surface_wave_height (*NOTE a new 'common concept')
sea_surface_wave_mean_crest_period
sea_surface_wave_significant_wave_period
sea_surface_wave_period_at_second_largest_peak_of_variance_spectral_density
sea_surface_wave_variance_spectral_density_zeroth_frequency_moment
sea_surface_wave_root_mean_square_amplitude_from_variance_spectral_density
*NOTE:
The 'sea_surface_wave_height' when combined with a cell method of:
>>>
time: mean
time: maximum
time: root_mean_square (new proposed cell method)
time: mean_of_upper_decile (new proposed cell method)
>>>
will describe these 4 statistical wave height variables:
>>>
sea_surface_mean_wave_height
sea_surface_maximum_wave_height
sea_surface_root_mean_square_wave_height
sea_surface_wave_mean_of_highest_one_tenth_waves
respectively.
Thanks,
Andrew Walsh
Data Facilitator - Australian Ocean Data Network
----- Original Message -----
From: "Eric D'Asaro" <dasaro at apl.washington.edu>
To: <cf-metadata at cgd.ucar.edu>
Cc: "Jim Thomson" <jthomson at apl.washington.edu>; "Meghan Cronin"
<Meghan.F.Cronin at noaa.gov>; "Ramsey Harcourt" <harcourt at apl.washington.edu>;
"Fox-Kemper Baylor" <bfk at colorado.edu>; "H. Paul Freitag"
<Paul.Freitag at noaa.gov>
Sent: Wednesday, October 27, 2010 16:24
Subject: Re: [CF-metadata] Seeking new CF standard names (waves andbiogeochem)
> Meghan et. al:
>
> I think we would be missing a great opportunity if we used only the wave
> variables proposed below. We have good dynamical reasons to think that waves
> are important in upper ocean dynamics and not just for purposes of directing
> shipping or filling up mandated data bases. I expect that in the future,
> ocean models will be coupled to wave models (as is already done for tropical
> cyclone models) and that historical wave data will be important in developing
> and verifying these models. In another project we are struggling with
> trying to reconstruct dynamically appropriate wave spectra from historical
> wave data that is archived in such a way as to make proper reconstruction
> very difficult. It would be a great waste if OceanSITES makes the same
> mistake.
>
> Variables should be added to the list that are sufficient to
> 1. Resconstruct the important features of the directional wave spectrum,
> including energy and momentum flux and their depth profiles
> 2. Provide indications of the wave steepness and breaking probabilities.
>
> Specific suggestions are perhaps better made by others (Baylor?, Jim?
> Ramsey?).
>
>
>>>
>>> -------- Original Message --------
>>> Subject: Fwd: Seeking new CF standard names (waves and biogeochem)
>>> Date: Thu, 21 Oct 2010 10:37:36 -0400
>>> From: Nan Galbraith <ngalbraith at whoi.edu>
>>> Reply-To: ngalbraith at whoi.edu
>>> To: ots-dmt <oceansites-dmt at jcommops.org>
>>>
>>> Hi all -
>>>
>>> For anyone in OceanSITES who measures waves, there's a recent
>>> discussion on the CF mailing list about new standard names. This
>>> would be a good time to weigh in, if you haven't already, since we'll
>>> want to use these terms in OceanSITES data files if and when we
>>> include wave parameters.
>>>
>>> You need to be a member of the CF list to post a reply. You can join
>>> at
>>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>> .
>>>
>>> There's also been some discussion on biogeochem terms that might
>>> be useful to some here.
>>>
>>> Regards -
>>> Nan
>>>
>>> -------- Original Message --------
>>> Subject: Re: [CF-metadata] Seeking new CF standard names (9) for sea
>>> surface wave parameters
>>> Date: Thu, 21 Oct 2010 11:09:29 +1100
>>> From: andrew walsh
>>> <awalsh at metoc.gov.au>
>>>
>>>
>>>
>>>
>>> Hi Jonathon and CF metadata list,
>>>
>>> Summarising our discussions thus far we propose:
>>>
>>> 2 new Cell methods:
>>>
>>> root_mean_square
>>> mean_of_upper_decile
>>>
>>> and these new standard names:
>>>
>>> sea_surface_wave_height (common concept)
>>> sea_surface_wave_mean_crest_period
>>> sea_surface_wave_significant_wave_period
>>> sea_surface_wave_period_at_second_largest_peak_of_variance_spectral_density
>>> sea_surface_wave_variance_spectral_density_zeroth_frequency_moment
>>> sea_surface_wave_root_mean_square_amplitude_from_variance_spectral_density
>>>
>>> The sea_surface_wave_height is a common concept (standard name) which may
>>> be
>>> qualified by a cell_method attribute to realise the actual variable. The
>>> sea_surface_wave_height
>>> when combined with a cell method of:
>>>
>>> time: mean
>>> time: maximum
>>> time: root_mean_square
>>> time: mean_of_upper_decile
>>>
>>> will describe the statistical wave height variables:
>>>
>>> sea_surface_mean_wave_height
>>> sea_surface_maximum_wave_height
>>> sea_surface_root_mean_square_wave_height
>>> sea_surface_wave_mean_of_highest_one_tenth_waves
>>>
>>> respectively.
>>>
>>> I have attached a spreadsheet which contains the names, descriptions and
>>> units
>>> of the variables proposed.
>>>
>>> Looking forward to getting final approval to add these to the CF name
>>> lists.
>>>
>>>
>>> Andrew Walsh
>>> Data Facilitator AODN
>>>
>>> ----- Original Message -----
>>> From: "Jonathan Gregory"
>>> <j.m.gregory at reading.ac.uk>
>>>
>>> To: "andrew walsh"
>>> <awalsh at metoc.gov.au>
>>>
>>> Cc:
>>> <cf-metadata at cgd.ucar.edu>; "Mark Kulmar"<Mark.Kulmar at mhl.nsw.gov.au>
>>>
>>> Sent: Wednesday, October 13, 2010 20:21
>>> Subject: [CF-metadata] Seeking new CF standard names (9) for sea surface
>>> wave
>>> parameters
>>>
>>>
>>>> Dear Andrew
>>>>
>>>>> Yes, but depends on the community (list) accepting the idea of having a
>>>>
>>>> Good. I think we are agreed then to propose these new cell methods:
>>>>
>>>> root_mean_square
>>>> mean_of_upper_decile
>>>>
>>>> and these new standard names:
>>>>
>>>> sea_surface_wave_height
>>>> sea_surface_wave_mean_crest_period
>>>> sea_surface_wave_significant_wave_period
>>>> sea_surface_wave_period_at_second_largest_peak_of_variance_spectral_density
>>>> sea_surface_wave_variance_spectral_density_zeroth_frequency_moment
>>>> sea_surface_wave_root_mean_square_amplitude_from_variance_spectral_density
>>>>
>>>> I agree that the last will avoid confusion with the RMS of wave height.
>>>>
>>>> I agree also that this depends on users being comfortable with the
>>>> concepts
>>>> being split into two attributes, in accordance with the usual CF practice,
>>>> but deciding on how to join them up as common_concepts will help. Comments
>>>> from others would help. It is good that Roy supports this compromise.
>>>>
>>>> Best wishes
>>>>
>>>> Jonathan
>>>>
>>>>
>>>
>>>
>>>
>>>
>>> Cliquez sur l'url suivante
>>>
>>> https://www.mailcontrol.com/sr/tjkP04wPWEHTndxI!oX7UpBlscM9Pl1fAM1p1zO6h070olZRfJ6KoHxitOmXf8!eLCPtl9EVgldLRkMuvIdUTQ==
>>>
>>> si ce message est ind?sirable (pourriel).
>>>
>>>
>>> <Proposed_wave_parm_names_for_CFlist.xls><Attached Message Part.txt>
>>
>>
>
> _______________________________________________
> CF-metadata mailing list
> CF-metadata at cgd.ucar.edu
> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>
>
>
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Received on Wed Oct 27 2010 - 00:16:43 BST
