Dear Matthias, All,
In February Matthias Lankhorst proposed four new names for ocean volume transport. Jonathan was the only person to comment and he supported three of the proposals. The fourth proposal has been withdrawn for the time being.
The following three names are accepted for inclusion in the standard name table and will be added at the next update. (The definition text is drawn from existing standard names).
ocean_volume_transport_across_line (m3 s-1)
' Transport across_line means that which crosses a particular line on the Earth's surface; formally this means the integral along the line of the normal component of the transport.'
ocean_volume_x_transport (m3 s-1)
' "x" indicates a vector component along the grid x-axis, positive with increasing x.'
ocean_volume_y_transport (m3 s-1)
' "y" indicates a vector component along the grid y-axis, positive with increasing y.'
Best wishes,
Alison
------
Alison Pamment Tel: +44 1235 778065
NCAS/British Atmospheric Data Centre Email: alison.pamment at stfc.ac.uk
STFC Rutherford Appleton Laboratory
R25, 2.22
Harwell Oxford, Didcot, OX11 0QX, U.K.
> -----Original Message-----
> From: CF-metadata [mailto:cf-metadata-bounces at cgd.ucar.edu] On Behalf
> Of Matthias Lankhorst
> Sent: 13 February 2013 20:52
> To: cf-metadata at cgd.ucar.edu
> Subject: Re: [CF-metadata] standard names for ocean volume transport
>
> Hi,
>
> OK, then let us get these three queued up into the standard_name table:
>
> ocean_volume_transport_across_line
> ocean_volume_x_transport
> ocean_volume_y_transport
>
> Canonical units are m^3 s^(-1) for all three.
>
> My thinking reg. the fourth name proposal,
> "northward_ocean_volume_transport_due_to_overturning", was that we
> may want to
> express this property over limited depth (or lat/lon) ranges (e.g. capturing
> only the upper 1000m in the Atlantic) where the net is not zero, and still be
> able to differentiate between what we think is overturning versus wind-
> driven
> gyre. However, I can do all I want without this, at least for now.
>
> Thanks to Jonathan for his insights!
>
> Regards, Matthias
>
>
>
>
> Date: Sat, 9 Feb 2013 09:49:50 +1100
> From: Jonathan Gregory <j.m.gregory at reading.ac.uk>
> To: cf-metadata at cgd.ucar.edu
> Subject: [CF-metadata] standard names for ocean volume transport
> Message-ID: <20130208224950.GA4925 at met.reading.ac.uk>
> Content-Type: text/plain; charset=us-ascii
>
> Dear Matthias
>
> > ocean_volume_transport_across_line
> > ocean_volume_x_transport
> > ocean_volume_y_transport
>
> These seem fine.
>
> > northward_ocean_volume_transport_due_to_overturning
> We already have ocean_meridional_overturning_streamfunction. Is that
> applicable for what you want? I would say that in an overturning circulation
> there is zero net northward or southward transport by construction. But
> perhaps you have something else in mind.
>
> > Although oceanographers will probably expect this property in units of
> > Sverdrup, I am fine with a canonical unit of m^3 s^(-1).
>
> It has been proposed to include sverdrup in a CF version of the udunits
> database. I can't remember if that has been done yet. But if not, you could
> use units of 1e6 m3 s-1, so it will be numerically sverdrups. Any unit which
> is dimensionally equivalent to the canonical unit is acceptable.
>
>
> > I noticed some of the existing names contain "ocean_", others
> "sea_water_".
> If
> > one is preferred over the other, let us please use that.
>
> In general "ocean" is used in large-scale properties e.g. of the circulation,
> sea-water for small-scale properties of the medium that can be measured
> locally. It's the same for atmosphere and air.
>
> Cheers
>
> Jonathan
>
>
>
>
>
> On Friday, February 08, 2013 10:11:42 am Matthias Lankhorst wrote:
> > Hi,
> >
> > I am looking for standard_name names for ocean volume transport, but
> could
> > not find any. There are a bunch of names for mass, heat, and salt
> > transports, but nothing for volume.
> >
> > Unless somebody can point to existing names, can we please consider
> adding
> > at least the following name, possibly the subsequent ones as well:
> >
> > ocean_volume_transport_across_line
> >
> > ocean_volume_x_transport
> > ocean_volume_y_transport
> > northward_ocean_volume_transport_due_to_overturning
> >
> > Although oceanographers will probably expect this property in units of
> > Sverdrup, I am fine with a canonical unit of m^3 s^(-1).
> >
> > I noticed some of the existing names contain "ocean_", others
> "sea_water_".
> > If one is preferred over the other, let us please use that.
> >
> > Regards, Matthias
>
> --
> _______________________________________
>
> Dr. Matthias Lankhorst
> Scripps Institution of Oceanography
> 9500 Gilman Drive, Mail Code 0230
> La Jolla, CA 92093-0230
> USA
>
> Phone: +1 858 822 5013
> Fax: +1 858 534 9820
> E-Mail: mlankhorst at ucsd.edu
> http://www-pord.ucsd.edu/~mlankhorst/
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Received on Tue Mar 12 2013 - 08:19:36 GMT
