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/
Received on Wed Feb 13 2013 - 13:51:36 GMT
