[CF-metadata] standard names under ice velocity of water

Lowry, Roy K. rkl at bodc.ac.uk
Fri Jun 9 02:54:37 MDT 2017

Dear Chris,

My understanding (based on memory not research of the archives) was that this statement was deliberate to allow a single Standard Name to cover a field that is spatial distribution of the velocity of a water body at the point where it is in contact with the atmosphere whether or not it was frozen. In other words, it can represent the sea-ice velocity for some cells and the surface water velocity for others. Checking the archives to confirm this would be advisable before making any change to the definition.

 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 enquiries at bodc.ac.uk. Please also use this e-mail if your requirement is urgent.

From: CF-metadata <cf-metadata-bounces at cgd.ucar.edu> on behalf of Chris Barker <chris.barker at noaa.gov>
Sent: 09 June 2017 00:35
To: Ute Brönner
Cc: cf-metadata at cgd.ucar.edu; Morten Omholt Alver; Tor Nordam; Jonathan Gregory
Subject: Re: [CF-metadata] standard names under ice velocity of water

On Wed, Jun 7, 2017 at 11:53 PM, Ute Brönner <Ute.Broenner at sintef.no<mailto:Ute.Broenner at sintef.no>> wrote:
This is a citation of the CF standard
> The surface called "surface" means the lower boundary of the atmosphere. "Water" means water in all phases, including frozen i.e. ice and snow. A velocity is a vector quantity. "Eastward" indicates a vector component which is positive when directed eastward (negative westward). < (http://cfconventions.org/Data/cf-standard-names/28/build/cf-standard-name-table.html)

In our model we distinguish between ice velocity and the water velocity under the ice in addition to the (average) water velocity in the upper layer. Guess we would be fine if surface_eastward_sea_water_velocity and surface_northward_sea_water_velocity would not include ice per definition.

I"d like that too.

unfortunately, someone put ""Water means water in all phases, including frozen i.e. ice and snow." in that definition at some point -- can we change it now?

I wonder it was there for a real use case, or if that was a definition of "water" from elsewhere that got cut&pasted in...



Christopher Barker, Ph.D.

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