[CF-metadata] Wave Direction, Energy and Steepness Sub-Proposal

[Lowry, Roy K.]

Dear All,

Please find the third part of the wave Standard Name proposal. This includes changes to the definition for five of the six existing wave direction Standard names plus five new Standard names.

Based on the proposal of Elodie and Marta with further off-list discussion by Chris Barker, nan Galbraith and myself.

Cheers, Roy.

Changes to Existing Standard Name Definitions

1) sea_surface_swell_wave_from_direction

Current Definition
Swell waves are waves on the ocean surface. "from_direction" is used in the construction X_from_direction and indicates the direction from which the velocity vector of X is coming.

New Definition
"From_direction" is used in the construction X_from_direction and indicates the direction from which the velocity vector of X is coming. The direction is a bearing in the usual geographical sense, measured positive clockwise from due north. Swell waves are the low frequency portion of a bimodal wave frequency distribution.

2) sea_surface_swell_wave_to_direction

Current Definition
Swell waves are waves on the ocean surface. "to_direction" is used in the construction X_to_direction and indicates the direction towards which the velocity vector of X is headed. The direction is a bearing in the usual geographical sense, measured positive clockwise from due north.

New Definition
"To_direction" is used in the construction X_to_direction and indicates the direction towards which the velocity vector of X is headed. The direction is a bearing in the usual geographical sense, measured positive clockwise from due north. Swell waves are the low frequency portion of a bimodal wave frequency distribution.

3) sea_surface_wave_from_direction

Current Definition
'from_direction' is used in the construction X_from_direction and indicates the direction from which the velocity vector of X is coming.

New Definition
"From_direction" is used in the construction X_from_direction and indicates the direction from which the velocity vector of X is coming. The direction is a bearing in the usual geographical sense, measured positive clockwise from due north.

4) sea_surface_wave_to_direction

Current Definition - No Change Proposed
"to_direction" is used in the construction X_to_direction and indicates the direction towards which the velocity vector of X is headed. The direction is a bearing in the usual geographical sense, measured positive clockwise from due north.

5) sea_surface_wind_wave_from_direction

Current Definition
Wind waves are waves on the ocean surface. Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name "upward_air_velocity".) "from_direction" is used in the construction X_from_direction and indicates the direction from which the velocity vector of X is coming.

New Definition
"From_direction" is used in the construction X_from_direction and indicates the direction from which the velocity vector of X is coming. The direction is a bearing in the usual geographical sense, measured positive clockwise from due north. Wind waves are the high frequency portion of a bimodal wave frequency distribution.

6) sea_surface_wind_wave_to_direction

Current Definition
Wind waves are waves on the ocean surface. Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name "upward_air_velocity".) "to_direction" is used in the construction X_to_direction and indicates the direction towards which the velocity vector of X is headed. The direction is a bearing in the usual geographical sense, measured positive clockwise from due north.

New Definition
"To_direction" is used in the construction X_to_direction and indicates the direction towards which the velocity vector of X is headed. The direction is a bearing in the usual geographical sense, measured positive clockwise from due north. Wind waves are the high frequency portion of a bimodal wave frequency distribution.

New Standard Names

1) sea_surface_wave_from_direction_at_spectral_peak

The direction from which the waves at the spectral peak are coming. The spectral peak comprises the most energetic waves encountered during the measurement period. The direction is a bearing in the usual geographical sense, measured positive clockwise from due north.

Canonical units = degrees.

2) sea_surface_primary_swell_wave_from_direction
"From_direction" is used in the construction X_from_direction and indicates the direction from which the velocity vector of X is coming. The direction is a bearing in the usual geographical sense, measured positive clockwise from due north. The primary swell wave is the most energetic wave in the low frequency portion of a bimodal wave frequency distribution.

Canonical units = degrees.

3) sea_surface_secondary_swell_wave_from_direction
"From_direction" is used in the construction X_from_direction and indicates the direction from which the velocity vector of X is coming. The direction is a bearing in the usual geographical sense, measured positive clockwise from due north. The secondary swell wave is the second most energetic wave in the low frequency portion of a bimodal wave frequency distribution.

Canonical units = degrees.

4) sea_surface_wave_maximum_steepness
Wave steepness is defined as the ratio of the wave height divided by the wavelength. The maximum wave steepness is the greatest value observed during the observation period. Wave height is defined as the vertical distance from a wave trough to the following wave crest. The wavelength is the horizontal distance from this trough to the next trough.

Canonical units = dimensionless.

5) sea_wave_spectrum_peak_energy
The wave directional spectrum can be written as a five dimensional function S(t,x,y,f,theta) where t is time, x and y are horizontal coordinates (such as longitude and latitude), f is frequency and theta is direction. S has the standard name sea_surface_wave_directional_variance_spectral_density. S can be integrated over direction to give S1= integral(S dtheta) and this quantity has the standard name sea_surface_wave_variance_spectral_density. Wave spectrum peak energy is the maximum value of the variance spectral density (max(S1)).

Canonical units = Square metre seconds (m^2.s)


Please note that I partially retired on 01/11/2015. I am now only working 7.5 hours a week and can only guarantee e-mail response on Wednesdays, my day in the office. All vocabulary queries should be sent to ***@bodc.ac.uk<mailto:***@bodc.ac.uk>. Please also use this e-mail if your requirement is urgent.


________________________________
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.
________________________________

[Nan Galbraith]

Thanks, Roy, for all your work on this. I have a possibly belated
suggestion,
and one question.

I'd like to suggest that, where we have a definition of the 'main term'
such as
'sea_surface_swell_wave', we just change the order of the sentences in the
definition, with the main term being defined first, which would give us,
for
example,

*sea_surface_swell_wave_from_direction **
**Swell waves are the low frequency portion of a bimodal wave frequency
distribution. **
**"From_direction" is used in the construction X_from_direction and
indicates the direction **
**from which the velocity vector of X is coming. The direction is a
bearing in the usual **
**geographical sense, measured positive clockwise from due north.*

I tried to write this out for each of the definitions below, but the
email message's
formatting got the better of me, and I gave up.

My question is: are we using the term 'sea_surface' in a slightly
different way from other
places it appears in CF, like sea_surface_temperature? That seems to be
a deprecated
alias for skin temperature, and should not have a depth associated with
it. Do we need
to include a description of how this term is used in waves, as part of
these definitions?

Thanks!
Nan


On 6/1/16 9:06 AM, Lowry, Roy K. wrote:
> Dear All,
> Please find the third part of the wave Standard Name proposal. This
> includes changes to the definition for five of the six existing wave
> direction Standard names plus five new Standard names.
> Based on the proposal of Elodie and Marta with further off-list
> discussion by Chris Barker, nan Galbraith and myself.
> Cheers, Roy.
> *Changes to Existing Standard Name Definitions*
>
> 1. *sea_surface_swell_wave_from_direction *
>
> */Current Definition/*
> Swell waves are waves on the ocean surface. "from_direction" is used
> in the construction X_from_direction and indicates the direction from
> which the velocity vector of X is coming.
> */New Definition/*
> "From_direction" is used in the construction X_from_direction and
> indicates the direction from which the velocity vector of X is coming.
> The direction is a bearing in the usual geographical sense, measured
> positive clockwise from due north. Swell waves are the low frequency
> portion of a bimodal wave frequency distribution.
>
> 2. *sea_surface_swell_wave_to_direction*
>
> */Current Definition /*
> Swell waves are waves on the ocean surface. "to_direction" is used in
> the construction X_to_direction and indicates the direction towards
> which the velocity vector of X is headed. The direction is a bearing
> in the usual geographical sense, measured positive clockwise from due
> north.
> */New Definition/*
> "To_direction" is used in the construction X_to_direction and
> indicates the direction towards which the velocity vector of X is
> headed. The direction is a bearing in the usual geographical sense,
> measured positive clockwise from due north. Swell waves are the low
> frequency portion of a bimodal wave frequency distribution.
>
> 3. *sea_surface_wave_from_direction*
>
> */Current Definition /*
> 'from_direction' is used in the construction X_from_direction and
> indicates the direction from which the velocity vector of X is coming.
> */New Definition/*
> "From_direction" is used in the construction X_from_direction and
> indicates the direction from which the velocity vector of X is coming.
> The direction is a bearing in the usual geographical sense, measured
> positive clockwise from due north.
>
> 4. *sea_surface_wave_to_direction *
>
> */Current Definition - No Change Proposed /*
> "to_direction" is used in the construction X_to_direction and
> indicates the direction towards which the velocity vector of X is
> headed. The direction is a bearing in the usual geographical sense,
> measured positive clockwise from due north.
>
> 5. *sea_surface_wind_wave_from_direction *
>
> */Current Definition /*
> Wind waves are waves on the ocean surface. Wind is defined as a
> two-dimensional (horizontal) air velocity vector, with no vertical
> component. (Vertical motion in the atmosphere has the standard name
> "upward_air_velocity".) "from_direction" is used in the construction
> X_from_direction and indicates the direction from which the velocity
> vector of X is coming.
> */New Definition/*
> "From_direction" is used in the construction X_from_direction and
> indicates the direction from which the velocity vector of X is coming.
> The direction is a bearing in the usual geographical sense, measured
> positive clockwise from due north. Wind waves are the high frequency
> portion of a bimodal wave frequency distribution.
>
> 6. *sea_surface_wind_wave_to_direction *
>
> */Current Definition /*
> Wind waves are waves on the ocean surface. Wind is defined as a
> two-dimensional (horizontal) air velocity vector, with no vertical
> component. (Vertical motion in the atmosphere has the standard name
> "upward_air_velocity".) "to_direction" is used in the construction
> X_to_direction and indicates the direction towards which the velocity
> vector of X is headed. The direction is a bearing in the usual
> geographical sense, measured positive clockwise from due north.
> */New Definition/*
> "To_direction" is used in the construction X_to_direction and
> indicates the direction towards which the velocity vector of X is
> headed. The direction is a bearing in the usual geographical sense,
> measured positive clockwise from due north. Wind waves are the high
> frequency portion of a bimodal wave frequency distribution.
> *New Standard Names*
>
> 1. *sea_surface_wave_from_direction_at_spectral_peak*
>
> The direction from which the waves at the spectral peak are coming.
> The spectral peak comprises the most energetic waves encountered
> during the measurement period. The direction is a bearing in the usual
> geographical sense, measured positive clockwise from due north.
> Canonical units = degrees.
> **
>
> 2. *sea_surface_primary_swell_wave_from_direction*
>
> "From_direction" is used in the construction X_from_direction and
> indicates the direction from which the velocity vector of X is coming.
> The direction is a bearing in the usual geographical sense, measured
> positive clockwise from due north. The primary swell wave is the most
> energetic wave in the low frequency portion of a bimodal wave
> frequency distribution.
> Canonical units = degrees.
>
> 3. *sea_surface_secondary_swell_wave_from_direction*
>
> "From_direction" is used in the construction X_from_direction and
> indicates the direction from which the velocity vector of X is coming.
> The direction is a bearing in the usual geographical sense, measured
> positive clockwise from due north. The secondary swell wave is the
> second most energetic wave in the low frequency portion of a bimodal
> wave frequency distribution.
> Canonical units = degrees.
>
> 4. *sea_surface_wave_maximum_steepness*
>
> Wave steepness is defined as the ratio of the wave height divided by
> the wavelength. The maximum wave steepness is the greatest value
> observed during the observation period. Wave height is defined as the
> vertical distance from a wave trough to the following wave crest. The
> wavelength is the horizontal distance from this trough to the next
> trough.
>
> Canonical units = dimensionless.
>
> 5. *sea_wave_spectrum_peak_energy*
>
> The wave directional spectrum can be written as a five dimensional
> function S(t,x,y,f,theta) where t is time, x and y are horizontal
> coordinates (such as longitude and latitude), f is frequency and theta
> is direction. S has the standard name
> sea_surface_wave_directional_variance_spectral_density. S can be
> integrated over direction to give S1= integral(S dtheta) and this
> quantity has the standard name
> sea_surface_wave_variance_spectral_density. Wave spectrum peak energy
> is the maximum value of the variance spectral density (max(S1)).
> Canonical units = Square metre seconds (m^2.s)
> Please note that I partially retired on 01/11/2015. I am now only
> working 7.5 hours a week and can only guarantee e-mail response on
> Wednesdays, my day in the office. All vocabulary queries should be
> sent to ***@bodc.ac.uk_ <mailto:***@bodc.ac.uk>. Please
> also use this e-mail if your requirement is urgent.
> _________________________________ _
> 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.
> _________________________________ _
>
>
> _______________________________________________
> CF-metadata mailing list
> CF-***@cgd.ucar.edu
> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata


--
*******************************************************
* Nan Galbraith Information Systems Specialist *
* Upper Ocean Processes Group Mail Stop 29 *
* Woods Hole Oceanographic Institution *
* Woods Hole, MA 02543 [phone] *
*******************************************************

[Lowry, Roy K.]

Hi Nan,


This goes beyond the scope of the current proposal, covering many existing Standard Names where I haven't proposed changes to the definition(I only fixed the real howlers) and all existing wave Standard Names that include 'sea_surface'. This causes me great concern as it sets us on a course of entangling a wide-ranging review of a significant number of additional Standard Name definitions with the howler fixing and the new names required by Marta and Elodie. The inevitable result of this course is that it will be months before we make any progress.


I have also received off-list feedback with wider implications for Standard Name definitions, but not the names themselves concerning the use of 'due North' and the definitions of 'wind wave' and 'swell wave'.


Consequently, how about a strategy of considering the three sub-proposals 'accepted' and getting them published as there is no remaining controversy over the new names and there is general agreement that the changed definitions whilst not perfect are significantly better than what is already there?



Once we've reached that milestone we can then work to produce a document proposing further improvements to the definitions across all wave Standard Names resulting in an internally consistent set of definitions.


Cheers, Roy.


Please note that I partially retired on 01/11/2015. I am now only working 7.5 hours a week and can only guarantee e-mail response on Wednesdays, my day in the office. All vocabulary queries should be sent to ***@bodc.ac.uk. Please also use this e-mail if your requirement is urgent.


________________________________
From: CF-metadata <cf-metadata-***@cgd.ucar.edu> on behalf of Nan Galbraith <***@whoi.edu>
Sent: 14 June 2016 16:26
To: cf-***@cgd.ucar.edu
Subject: Re: [CF-metadata] Wave Direction, Energy and Steepness Sub-Proposal

Thanks, Roy, for all your work on this. I have a possibly belated
suggestion,
and one question.

I'd like to suggest that, where we have a definition of the 'main term'
such as
'sea_surface_swell_wave', we just change the order of the sentences in the
definition, with the main term being defined first, which would give us,
for
example,

*sea_surface_swell_wave_from_direction **
**Swell waves are the low frequency portion of a bimodal wave frequency
distribution. **
**"From_direction" is used in the construction X_from_direction and
indicates the direction **
**from which the velocity vector of X is coming. The direction is a
bearing in the usual **
**geographical sense, measured positive clockwise from due north.*

I tried to write this out for each of the definitions below, but the
email message's
formatting got the better of me, and I gave up.

My question is: are we using the term 'sea_surface' in a slightly
different way from other
places it appears in CF, like sea_surface_temperature? That seems to be
a deprecated
alias for skin temperature, and should not have a depth associated with
it. Do we need
to include a description of how this term is used in waves, as part of
these definitions?

Thanks!
Nan


On 6/1/16 9:06 AM, Lowry, Roy K. wrote:
> Dear All,
> Please find the third part of the wave Standard Name proposal. This
> includes changes to the definition for five of the six existing wave
> direction Standard names plus five new Standard names.
> Based on the proposal of Elodie and Marta with further off-list
> discussion by Chris Barker, nan Galbraith and myself.
> Cheers, Roy.
> *Changes to Existing Standard Name Definitions*
>
> 1. *sea_surface_swell_wave_from_direction *
>
> */Current Definition/*
> Swell waves are waves on the ocean surface. "from_direction" is used
> in the construction X_from_direction and indicates the direction from
> which the velocity vector of X is coming.
> */New Definition/*
> "From_direction" is used in the construction X_from_direction and
> indicates the direction from which the velocity vector of X is coming.
> The direction is a bearing in the usual geographical sense, measured
> positive clockwise from due north. Swell waves are the low frequency
> portion of a bimodal wave frequency distribution.
>
> 2. *sea_surface_swell_wave_to_direction*
>
> */Current Definition /*
> Swell waves are waves on the ocean surface. "to_direction" is used in
> the construction X_to_direction and indicates the direction towards
> which the velocity vector of X is headed. The direction is a bearing
> in the usual geographical sense, measured positive clockwise from due
> north.
> */New Definition/*
> "To_direction" is used in the construction X_to_direction and
> indicates the direction towards which the velocity vector of X is
> headed. The direction is a bearing in the usual geographical sense,
> measured positive clockwise from due north. Swell waves are the low
> frequency portion of a bimodal wave frequency distribution.
>
> 3. *sea_surface_wave_from_direction*
>
> */Current Definition /*
> 'from_direction' is used in the construction X_from_direction and
> indicates the direction from which the velocity vector of X is coming.
> */New Definition/*
> "From_direction" is used in the construction X_from_direction and
> indicates the direction from which the velocity vector of X is coming.
> The direction is a bearing in the usual geographical sense, measured
> positive clockwise from due north.
>
> 4. *sea_surface_wave_to_direction *
>
> */Current Definition - No Change Proposed /*
> "to_direction" is used in the construction X_to_direction and
> indicates the direction towards which the velocity vector of X is
> headed. The direction is a bearing in the usual geographical sense,
> measured positive clockwise from due north.
>
> 5. *sea_surface_wind_wave_from_direction *
>
> */Current Definition /*
> Wind waves are waves on the ocean surface. Wind is defined as a
> two-dimensional (horizontal) air velocity vector, with no vertical
> component. (Vertical motion in the atmosphere has the standard name
> "upward_air_velocity".) "from_direction" is used in the construction
> X_from_direction and indicates the direction from which the velocity
> vector of X is coming.
> */New Definition/*
> "From_direction" is used in the construction X_from_direction and
> indicates the direction from which the velocity vector of X is coming.
> The direction is a bearing in the usual geographical sense, measured
> positive clockwise from due north. Wind waves are the high frequency
> portion of a bimodal wave frequency distribution.
>
> 6. *sea_surface_wind_wave_to_direction *
>
> */Current Definition /*
> Wind waves are waves on the ocean surface. Wind is defined as a
> two-dimensional (horizontal) air velocity vector, with no vertical
> component. (Vertical motion in the atmosphere has the standard name
> "upward_air_velocity".) "to_direction" is used in the construction
> X_to_direction and indicates the direction towards which the velocity
> vector of X is headed. The direction is a bearing in the usual
> geographical sense, measured positive clockwise from due north.
> */New Definition/*
> "To_direction" is used in the construction X_to_direction and
> indicates the direction towards which the velocity vector of X is
> headed. The direction is a bearing in the usual geographical sense,
> measured positive clockwise from due north. Wind waves are the high
> frequency portion of a bimodal wave frequency distribution.
> *New Standard Names*
>
> 1. *sea_surface_wave_from_direction_at_spectral_peak*
>
> The direction from which the waves at the spectral peak are coming.
> The spectral peak comprises the most energetic waves encountered
> during the measurement period. The direction is a bearing in the usual
> geographical sense, measured positive clockwise from due north.
> Canonical units = degrees.
> **
>
> 2. *sea_surface_primary_swell_wave_from_direction*
>
> "From_direction" is used in the construction X_from_direction and
> indicates the direction from which the velocity vector of X is coming.
> The direction is a bearing in the usual geographical sense, measured
> positive clockwise from due north. The primary swell wave is the most
> energetic wave in the low frequency portion of a bimodal wave
> frequency distribution.
> Canonical units = degrees.
>
> 3. *sea_surface_secondary_swell_wave_from_direction*
>
> "From_direction" is used in the construction X_from_direction and
> indicates the direction from which the velocity vector of X is coming.
> The direction is a bearing in the usual geographical sense, measured
> positive clockwise from due north. The secondary swell wave is the
> second most energetic wave in the low frequency portion of a bimodal
> wave frequency distribution.
> Canonical units = degrees.
>
> 4. *sea_surface_wave_maximum_steepness*
>
> Wave steepness is defined as the ratio of the wave height divided by
> the wavelength. The maximum wave steepness is the greatest value
> observed during the observation period. Wave height is defined as the
> vertical distance from a wave trough to the following wave crest. The
> wavelength is the horizontal distance from this trough to the next
> trough.
>
> Canonical units = dimensionless.
>
> 5. *sea_wave_spectrum_peak_energy*
>
> The wave directional spectrum can be written as a five dimensional
> function S(t,x,y,f,theta) where t is time, x and y are horizontal
> coordinates (such as longitude and latitude), f is frequency and theta
> is direction. S has the standard name
> sea_surface_wave_directional_variance_spectral_density. S can be
> integrated over direction to give S1= integral(S dtheta) and this
> quantity has the standard name
> sea_surface_wave_variance_spectral_density. Wave spectrum peak energy
> is the maximum value of the variance spectral density (max(S1)).
> Canonical units = Square metre seconds (m^2.s)
> Please note that I partially retired on 01/11/2015. I am now only
> working 7.5 hours a week and can only guarantee e-mail response on
> Wednesdays, my day in the office. All vocabulary queries should be
> sent to ***@bodc.ac.uk_ <mailto:***@bodc.ac.uk>. Please
> also use this e-mail if your requirement is urgent.
> _________________________________ _
> 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.
> _________________________________ _
>
>
> _______________________________________________
> CF-metadata mailing list
> CF-***@cgd.ucar.edu
> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata


--
*******************************************************
* Nan Galbraith Information Systems Specialist *
* Upper Ocean Processes Group Mail Stop 29 *
* Woods Hole Oceanographic Institution *
* Woods Hole, MA 02543 [phone] *
*******************************************************


_______________________________________________
CF-metadata mailing list
CF-***@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.
________________________________

[Nan Galbraith]

Hi Roy -

I didn't mean to change the 'names themselves', just the order of the
sentences in
some of the new definitions. Sorry if this wasn't clear.

So, for example, the proposed new definition for
sea_surface_swell_wave_to_direction is:

"To_direction" is used in the construction X_to_direction and indicates
the direction towards
which the velocity vector of X is headed. The direction is a bearing in
the usual geographical
sense, measured positive clockwise from due north. Swell waves are the
low frequency portion
of a bimodal wave frequency distribution.

and I am suggesting it be slightly tweaked to:

Swell waves are the low frequency portion of a bimodal wave frequency
distribution.
"To_direction" is used in the construction X_to_direction and indicates
the direction
towards which the velocity vector of X is headed. The direction is a
bearing in the usual
geographical sense, measured positive clockwise from due north.

Is that what you thought I was proposing? It seems like a minor change,
to me. I
don't think it needs to be done to every variable, just the ones that
are being
updated under your proposal and that include a definition of the 'main
term' in
the proposed definition.

Thanks - Nan



On 6/14/16 12:09 PM, Lowry, Roy K. wrote:
>
> Hi Nan,
>
>
> This goes beyond the scope of the current proposal, covering
> many existing Standard Names where I haven't proposed changes to the
> definition(I only fixed the real howlers) and all existing
> wave Standard Names that include 'sea_surface'. This causes me great
> concern as it sets us on a course of entangling a wide-ranging
> review of a significant number of additional Standard Name definitions
> with the howler fixing and the new names required by Marta and Elodie.
> The inevitable result of this course is that it will be months before
> we make any progress.
>
>
> I have also received off-list feedback with wider implications for
> Standard Name *definitions*, but not the names themselves concerning
> the use of 'due North' and the definitions of 'wind wave' and 'swell
> wave'.
>
>
> Consequently, how about a strategy of considering the three
> sub-proposals 'accepted' and getting them published as there is no
> remaining controversy over the new names and there is general
> agreement that the changed definitions whilst not perfect are
> significantly better than what is already there?
>
> Once we've reached that milestone we can then work to produce a
> document proposing further improvements to the definitions across all
> wave Standard Names resulting in an internally consistent set of
> definitions.
>
>
> Cheers, Roy.
>
>
> Please note that I partially retired on 01/11/2015. I am now only
> working 7.5 hours a week and can only guarantee e-mail response on
> Wednesdays, my day in the office. All vocabulary queries should be
> sent to ***@bodc.ac.uk. Please also use this e-mail if your
> requirement is urgent.
>
>
>
> ------------------------------------------------------------------------
> *From:* CF-metadata <cf-metadata-***@cgd.ucar.edu> on behalf of
> Nan Galbraith <***@whoi.edu>
> *Sent:* 14 June 2016 16:26
> *To:* cf-***@cgd.ucar.edu
> *Subject:* Re: [CF-metadata] Wave Direction, Energy and Steepness
> Sub-Proposal
> Thanks, Roy, for all your work on this. I have a possibly belated
> suggestion,
> and one question.
>
> I'd like to suggest that, where we have a definition of the 'main term'
> such as
> 'sea_surface_swell_wave', we just change the order of the sentences in the
> definition, with the main term being defined first, which would give us,
> for
> example,
>
> *sea_surface_swell_wave_from_direction **
> **Swell waves are the low frequency portion of a bimodal wave frequency
> distribution. **
> **"From_direction" is used in the construction X_from_direction and
> indicates the direction **
> **from which the velocity vector of X is coming. The direction is a
> bearing in the usual **
> **geographical sense, measured positive clockwise from due north.*
>
> I tried to write this out for each of the definitions below, but the
> email message's
> formatting got the better of me, and I gave up.
>
> My question is: are we using the term 'sea_surface' in a slightly
> different way from other
> places it appears in CF, like sea_surface_temperature? That seems to be
> a deprecated
> alias for skin temperature, and should not have a depth associated with
> it. Do we need
> to include a description of how this term is used in waves, as part of
> these definitions?
>
> Thanks!
> Nan
> ------------------------------------------------------------------------


--
*******************************************************
* Nan Galbraith Information Systems Specialist *
* Upper Ocean Processes Group Mail Stop 29 *
* Woods Hole Oceanographic Institution *
* Woods Hole, MA 02543 [phone] *
*******************************************************

[Lowry, Roy K.]

Forget to use 'Reply All'.....

From: Lowry, Roy K.
Sent: 15 June 2016 08:05
To: ***@whoi.edu
Subject: Re: [CF-metadata] Wave Direction, Energy and Steepness Sub-Proposal


Hi Nan,



I thoroughly understand what you are proposing and that the proposed names are not affected. Your suggestion does potentially affect existing wave Standard Names outside the proposal and so I'm simply asking to park this consideration until after the current proposals are through the system to make managing the process easier. OK?



Cheers, Roy.



Please note that I partially retired on 01/11/2015. I am now only working 7.5 hours a week and can only guarantee e-mail response on Wednesdays, my day in the office. All vocabulary queries should be sent to ***@bodc.ac.uk<mailto:***@bodc.ac.uk>. Please also use this e-mail if your requirement is urgent.

________________________________
From: Nan Galbraith <***@whoi.edu<mailto:***@whoi.edu>>
Sent: 14 June 2016 21:46
To: Lowry, Roy K.; cf-***@cgd.ucar.edu<mailto:cf-***@cgd.ucar.edu>
Subject: Re: [CF-metadata] Wave Direction, Energy and Steepness Sub-Proposal

Hi Roy -

I didn't mean to change the 'names themselves', just the order of the
sentences in
some of the new definitions. Sorry if this wasn't clear.

So, for example, the proposed new definition for
sea_surface_swell_wave_to_direction is:

"To_direction" is used in the construction X_to_direction and indicates
the direction towards
which the velocity vector of X is headed. The direction is a bearing in
the usual geographical
sense, measured positive clockwise from due north. Swell waves are the
low frequency portion
of a bimodal wave frequency distribution.

and I am suggesting it be slightly tweaked to:

Swell waves are the low frequency portion of a bimodal wave frequency
distribution.
"To_direction" is used in the construction X_to_direction and indicates
the direction
towards which the velocity vector of X is headed. The direction is a
bearing in the usual
geographical sense, measured positive clockwise from due north.

Is that what you thought I was proposing? It seems like a minor change,
to me. I
don't think it needs to be done to every variable, just the ones that
are being
updated under your proposal and that include a definition of the 'main
term' in
the proposed definition.

Thanks - Nan



On 6/14/16 12:09 PM, Lowry, Roy K. wrote:
>
> Hi Nan,
>
>
> This goes beyond the scope of the current proposal, covering
> many existing Standard Names where I haven't proposed changes to the
> definition(I only fixed the real howlers) and all existing
> wave Standard Names that include 'sea_surface'. This causes me great
> concern as it sets us on a course of entangling a wide-ranging
> review of a significant number of additional Standard Name definitions
> with the howler fixing and the new names required by Marta and Elodie.
> The inevitable result of this course is that it will be months before
> we make any progress.
>
>
> I have also received off-list feedback with wider implications for
> Standard Name *definitions*, but not the names themselves concerning
> the use of 'due North' and the definitions of 'wind wave' and 'swell
> wave'.
>
>
> Consequently, how about a strategy of considering the three
> sub-proposals 'accepted' and getting them published as there is no
> remaining controversy over the new names and there is general
> agreement that the changed definitions whilst not perfect are
> significantly better than what is already there?
>
> Once we've reached that milestone we can then work to produce a
> document proposing further improvements to the definitions across all
> wave Standard Names resulting in an internally consistent set of
> definitions.
>
>
> Cheers, Roy.
>
>
> Please note that I partially retired on 01/11/2015. I am now only
> working 7.5 hours a week and can only guarantee e-mail response on
> Wednesdays, my day in the office. All vocabulary queries should be
> sent to ***@bodc.ac.uk<mailto:***@bodc.ac.uk>. Please also use this e-mail if your
> requirement is urgent.
>
>
>
> ------------------------------------------------------------------------
> *From:* CF-metadata <cf-metadata-***@cgd.ucar.edu<mailto:cf-metadata-***@cgd.ucar.edu>> on behalf of
> Nan Galbraith <***@whoi.edu<mailto:***@whoi.edu>>
> *Sent:* 14 June 2016 16:26
> *To:* cf-***@cgd.ucar.edu<mailto:cf-***@cgd.ucar.edu>
> *Subject:* Re: [CF-metadata] Wave Direction, Energy and Steepness
> Sub-Proposal
> Thanks, Roy, for all your work on this. I have a possibly belated
> suggestion,
> and one question.
>
> I'd like to suggest that, where we have a definition of the 'main term'
> such as
> 'sea_surface_swell_wave', we just change the order of the sentences in the
> definition, with the main term being defined first, which would give us,
> for
> example,
>
> *sea_surface_swell_wave_from_direction **
> **Swell waves are the low frequency portion of a bimodal wave frequency
> distribution. **
> **"From_direction" is used in the construction X_from_direction and
> indicates the direction **
> **from which the velocity vector of X is coming. The direction is a
> bearing in the usual **
> **geographical sense, measured positive clockwise from due north.*
>
> I tried to write this out for each of the definitions below, but the
> email message's
> formatting got the better of me, and I gave up.
>
> My question is: are we using the term 'sea_surface' in a slightly
> different way from other
> places it appears in CF, like sea_surface_temperature? That seems to be
> a deprecated
> alias for skin temperature, and should not have a depth associated with
> it. Do we need
> to include a description of how this term is used in waves, as part of
> these definitions?
>
> Thanks!
> Nan
> ------------------------------------------------------------------------


--
*******************************************************
* Nan Galbraith Information Systems Specialist *
* Upper Ocean Processes Group Mail Stop 29 *
* Woods Hole Oceanographic Institution *
* Woods Hole, MA 02543 [phone] *
*******************************************************

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