Hi Nan,
All I can do is tell you what we do. In P011 parameter vocabulary there are the following terms:
tethered mooring pressure sensor - Pressure (measured variable) exerted by the water column by semi-fixed in-situ pressure sensor
seafloor of oilrig leg mounted pressure sensor - Pressure (measured variable) exerted by the water column by fixed in-situ pressure sensor and corrected to read zero at sea level
Initially this was just 'Pressure (measured variable) exerted by the water column by fixed in-situ pressure sensor' but our data scientists had trouble seeing the difference between that and 'Pressure (measured variable) exerted by the water column plus atmosphere by fixed in-situ pressure sensor' - what I use for total pressure: approx 10 db at sea level). So, I said the same thing twice at different leveles of subtlety to make sure the message got across.
I also have:
CTD pressure sensor - Pressure (spatial co-ordinate) exerted by the water column by profiling pressure sensor and corrected to read zero at sea level
I admit that this is inelegant and verbose, but it seems to work in BODC.
Cheers, Roy.
>>> Nan Galbraith <ngalbraith at whoi.edu> 8/19/2008 2:13 am >>>
I'm pasing along this question from a discussion going
on among OceanSITES participants.
Can (or should) the CF standard differentiate between these
two very different measurements of sea water pressure:
1. A mooring with pressure sensors at various depths along
the wire, where the pressure values give information about
how the mooring was tilted by ambient currents.
2. Bottom pressure sensors, e.g. mounted rigidly at a fixed
location at or above the seafloor, where the pressure values
are a dynamically important quantity that integrates water
column weight (cf. air pressure on weather charts).
Thanks -
Nan
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Received on Tue Aug 19 2008 - 01:01:48 BST
