Thank you Jonathan and John for your emails.
I went through your earlier emails. One of the things that occurred to
me is that these discussions that you had are as much a part of the
standard as the names themselves. I think it would be great if there is
better "connection" between your email conversation and the standard
name tables. Often the short summary given in the standard name table,
while useful, is not sufficient to understand what the name stands for.
Coming to the problem of coming up with a standard name for pH
accurately, I can see the issue here. Though I am still not sure why not
all five standard names were included. If there is an analogy between
sea water pH and sea water temperature, as mentioned in one of the
emails, why not have sea_water_pH just as we have sea_water_temperature?
Upendra
On 12/8/2011 1:39 PM, John Graybeal wrote:
Hi Upendra,
The reason the "reporting scale" is attached to this name is that the
fundamental measurement, or property, to which it refers produces
numbers that are not comparable to pH derived using other techniques.
(They are actually measuring different quantities, not just a
different offset/scale value.)
From what I (not a scientist!) understand, it is often the case that
pH that doesn't mention its scale has been measured in a way that is
not an effective indicator of pH in sea water. So it is very
important to understand the way the pH was measured, in order that the
values be reported compatibly with others.
I am not knowledgeable enough to know the right answer to your two
questions, but the above may be useful input.
John
On Dec 8, 2011, at 08:35, Upendra Dadi wrote:
Hi All,
The standard name table has an entry called
"sea_water_ph_reported_on_total_scale". I have some data which does
not mention the scale used for the measurement of ph. Should there be
an another entry which does not mention the scale? Most of the
standard names I have seen doesn't mention the scale used|. Is it
common to attach within standard name, the scale used for the
measurement?
Upendra
|
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