I have no concern about whether this stream needs labeling. My concern
is whether you are defining something in the definition which is in no
way described by the label, and which will prevent that label being
used for other variables in other streams.
Put another way, what should the models that calculate the nominal
sea_floor_depth_below_sea_surface -- or an averaged value longer than
1 hour -- call their values?
John
On Jan 27, 2010, at 12:54, Lowry, Roy K wrote:
> Hi John,
>
> Simple pragmatism. It's what a BPR data stream tends to contain and
> so it needs labelling.
>
> Cheers, Roy.
>
> ________________________________________
> From: John Graybeal [jbgraybeal at mindspring.com]
> Sent: 27 January 2010 16:41
> To: Lowry, Roy K
> Cc: Jeff deLaBeaujardiere; cf-metadata at cgd.ucar.edu; Mike Garcia
> Subject: Re: [CF-metadata] seeking CF name for total water column
> height
>
> Any particular reason that you are biased for this name representing
> only a short-term value? Seems to me there is equally the need for a
> (measured or modeled) value that would be defined exactly the same
> way, but without the time qualifiers.
>
> In general, when CF has a measured observable, the name makes no
> statement about whether the variable has been measured
> instantaneously, or for 1 hour, or for one month. It's time-neutral.
> This has several advantages.
>
> I suggest either the same principle be applied here, or that the
> possibility of the longer-time-frame name be accommodated by adding a
> qualifier to the name associated with this definition.
>
> John
>
>
> On Jan 27, 2010, at 00:58, Lowry, Roy K wrote:
>
>> Dear All,
>>
>> I think a new Standard Name 'sea_floor_depth_below_sea_surface' is
>> what's needed here. My definition for this would be 'The vertical
>> distance between the sea surface and the seabed at a given point in
>> space and at a given instant in time or averaged over a time
>> interval that is significantly less than a tidal cycle (1 hour or
>> less).' This may seem complicated, but is needed to cover BPRs which
>> do some averaging to smooth out waves. My take on
>> 'height_above_sea_floor' would be as the z co-ordinate for something
>> inside a water body.
>>
>> May be worth pointing out to Jeff that there is already
>> 'sea_water_pressure_at_sea_floor' for BPR data that haven't been
>> converted to depth.
>>
>> I've expressed this as a depth rather than as a height to be
>> consistent with 'sea_floor_depth_below_sea_level' and so we don't
>> end up with different terms for the same quantity depending upon
>> whether one is looking upwards or downwards.
>>
>> Cheers, Roy.
>>
>> -----Original Message-----
>> From: cf-metadata-bounces at cgd.ucar.edu [mailto:cf-metadata-bounces at cgd.ucar.edu
>> ] On Behalf Of Jeff deLaBeaujardiere
>> Sent: 26 January 2010 22:22
>> To: cf-metadata at cgd.ucar.edu
>> Cc: Mike Garcia
>> Subject: [CF-metadata] seeking CF name for total water column height
>>
>> Hello-
>>
>> I am a new subscriber. We are hoping to adopt CF names wherever
>> possible in the context of the Integrated Ocean Observing System
>> (IOOS) Sensor Observation Services (SOS). Not all phenomena we
>> measure have immediately apparent CF names, however. We are using
>> this URL as a reference:
>> http://cf-pcmdi.llnl.gov/documents/cf-standard-names/standard-name-table/current/cf-standard-name-table.html
>>
>> The first example is total water column height as derived from a
>> bottom pressure recorder associated with a tsunami warning buoy.
>> This is not sea_surface_height_above_reference_ellipsoid or
>> _above_sea_level. It might be height_above_sea_floor but we're not
>> really sure what that refers to (height of what?).
>>
>> Is there a standard name present or planned that is equivalent to
>> total_water_column_height?
>>
>> Thanks for any information,
>> Jeff DLB
>>
>> --
>> Jeff de La Beaujardi?re, PhD
>> Senior Systems Architect, Data Integration Framework
>> Integrated Ocean Observing System (IOOS) Program Office
>> National Oceanic and Atmospheric Administration
>> 1100 Wayne Ave #1225, Silver Spring MD 20910 USA
>> +1 301 427 2427
>> Jeff.deLaBeaujardiere at noaa.gov
>> _______________________________________________
>> 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.
>>
>> _______________________________________________
>> CF-metadata mailing list
>> CF-metadata at cgd.ucar.edu
>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>
>
> --------------
> I have my new work email address: jgraybeal at ucsd.edu
> --------------
>
> John Graybeal <mailto:jgraybeal at ucsd.edu>
> phone: 858-534-2162
> System Development Manager
> Ocean Observatories Initiative Cyberinfrastructure Project: http://ci.oceanobservatories.org
> Marine Metadata Interoperability Project: http://marinemetadata.org
> --
> 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-metadata at cgd.ucar.edu
> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
--------------
I have my new work email address: jgraybeal at ucsd.edu
--------------
John Graybeal <mailto:jgraybeal at ucsd.edu>
phone: 858-534-2162
System Development Manager
Ocean Observatories Initiative Cyberinfrastructure Project:
http://ci.oceanobservatories.org
Marine Metadata Interoperability Project:
http://marinemetadata.org
Received on Wed Jan 27 2010 - 16:00:40 GMT
