Hi Jonathan,
Main reason I used 'oxygen probe membrane temperature' was to distinguish between two temperatures (membrane and ambient water) returned by some types of YSI oxygen sensor. This is a case where generic can be confusing.
Oxygen membrane temperature is of no value unless accompanied by the current flowing through the membrane, which is the parameter used with the temperature to calculate oxygen concentration. It therefore not a qualifier of the oxygen concentration in the way you suggest.
The other qualifying temperatures I mentioned (temp of conductivity, pH and pCO2 determination) should always be strongly bound to their related measurement - if they get separated they will inevitably be used erroneously as ambient temperatures.
In the case of oxygen, it gets even more confusing because the ambient water temperature at which the oxygen concentration was measured in-situ is often used to qualify oxygen concentration (or to compute oxygen saturation - the thing fish really care about!), but is a perfectly valid environmental parameter in its own right.
Cheers, Roy.
>>> Jonathan Gregory <j.m.gregory at reading.ac.uk> 03/19/06 7:12 PM >>>
Dear Roy cc Nan and all
Thanks for your list. I agree that we should give these standard names, as and
when they are requested. Nan originally asked about "the water temperature
returned by an oxygen sensor". Is this the same as what you called "oxygen
probe membrane"? Nan's sounds more generic.
Are quantities like this required only in association with some other quantity?
For instance, is the water temperature in the oxygen temperature an ancillary
parameter of the oxygen concentration measurement, and the temperature of pH
determination an ancillary parameter of the pH value? If that's the case, we
could regard these as "standard name parameters", like the reference pressure
defining the exner function or the name of the ellipsoid being used for sea
surface height. If they were subsidiary in that sense, all these different
temperatures wouldn't need different names, as they would be identifiable by
being pointed to by different data variables.
Alternatively, do you think that the water temperature measured by the oxygen
sensor might be stored by itself, separated from the oxygen measurement, and
so have to be identified by itself?
Best wishes
Jonathan
> I have the following entries of this type:
>
> Temperature of oxygen probe membrane
> Temperature of pH determination
> Temperature of pCO2 determination
> Temperature of fluorometer sample by fluorometer temperature sensor
> Temperature of conductivity measurement by thermosalinograph
> Temperature of the instrument top of electronics tube by telemetry buoy systems monitor
> Temperature of the instrument middle of electronics tube by telemetry buoy systems monitor
> Temperature of the instrument bottom of electronics tube by telemetry buoy systems monitor
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Received on Mon Mar 20 2006 - 06:22:38 GMT
