Dear Alison and all,
For "sea_surface_temperature", there is a problem stating definitively
that it is "not the skin or interface temperature". In most models the
skin and interface temperatures over ice-free (i.e., open) ocean are
indeed the same as sea_surface_temperature (by construction). I think
it would be more accurate (and less misleading) to say it is "not
*necessarily* the skin or interface temperature". You could also add to
the list "sea_surface_foundation_temperature" here because in models it
too is often the same as sea_surface_temperature". Models are
evolving, so this might not indefinitely be the case.
thanks,
Karl
On 3/2/16 9:40 AM, alison.pamment at stfc.ac.uk wrote:
>
> Dear Martin, All,
>
> No objections have been received to the proposed definition change and
> it is now accepted for publication in the standard name table.
>
> The name will in future appear as:
>
> sea_surface_temperature (canonical units: K)
>
> ?Sea surface temperature is usually abbreviated as "SST". It is the
> temperature of sea water near the surface (including the part under
> sea-ice, if any), not the skin or interface temperature, whose
> standard names are sea_surface_skin_temperature and
> surface_temperature, respectively. For the temperature of sea water at
> a particular depth or layer, a data variable of sea_water_temperature
> with a vertical coordinate axis should be used.?
>
> In response to Martin?s proposal I received an email from Craig Donlon
> (original proposer of many of the current sea_surface_X_temperature
> names). Craig and his team support the Martin?s proposal and
> additionally point out an error that occurs in the definition of the
> following names:
>
> sea_surface_skin_temperature
>
> sea_surface_subskin_temperature
>
> in which the first sentence reads ?The surface called "surface" means
> the lower boundary of the atmosphere? even though the temperatures are
> not in fact measured at the sea-air boundary. The suggestion is to
> delete the initial sentence from the definitions. I note also that a
> similar situation currently exists with the standard name
> sea_surface_foundation_temperature even though that temperature
> generally refers to a depth of 1 ? 5 m below the sea surface.
>
> I agree with Craig that the sentence should be deleted. I think it was
> probably included by accident because most ?surface? standard names do
> indeed refer to the interface between the bottom of the atmosphere and
> whatever lies beneath. I plan to remove the sentence from the
> definitions of these three names at the next standard name table
> update unless any objections are received in the meantime.
>
> Best wishes,
>
> Alison
>
> ------
>
> Alison Pamment Tel: +44 1235 778065
>
> Centre for Environmental Data Analysis Email:
> alison.pamment at stfc.ac.uk <mailto:J.A.Pamment at rl.ac.uk>
>
> STFC Rutherford Appleton Laboratory
>
> R25, 2.22
>
> Harwell Campus, Didcot, OX11 0QX, U.K.
>
> *From:*Pamment, Alison (STFC,RAL,RALSP)
> *Sent:* 03 February 2016 15:32
> *To:* Juckes, Martin (STFC,RAL,RALSP); cf-metadata at cgd.ucar.edu
> *Subject:* RE: Confusing skin temperature and interface temperature
>
> Dear Martin,
>
> Thank you for pointing this out. I agree that since the introduction
> of the very precisely defined sea_surface_skin_temperature name, the
> definition of the more generic name is confusing. I agree with your
> suggested amendment and unless anyone objects within the next seven
> days the change will be accepted and added at the next update of the
> standard name table.
>
> Best wishes,
>
> Alison
>
> *From:*Juckes, Martin (STFC,RAL,RALSP)
> *Sent:* 02 February 2016 16:07
> *To:* cf-metadata at cgd.ucar.edu <mailto:cf-metadata at cgd.ucar.edu>;
> Pamment, Alison (STFC,RAL,RALSP)
> *Subject:* Confusing skin temperature and interface temperature
>
> Hello All,
>
> The CF Standard Name sea_surface_temperature includes the statement
> that it is "./... not the skin temperature, whose standard name is
> surface_temperature/". The last phrase here is incorrect: the standard
> name of the skin temperature is/sea_surface_skin_temperature/, not
> /surface_temperature/. Can the definition be modified to read ".. /not
> the skin or interface temperature, whose standard names are
> sea_surface_skin_temperature and surface_temperature respectively/"?
>
> regards,
> Martin
>
>
>
> _______________________________________________
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> CF-metadata at cgd.ucar.edu
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