Hello CF
From: CF-metadata [cf-metadata-boun...@cgd.ucar.edu] on behalf of Jonathan
Gregory [j.m.greg...@reading.ac.uk]
Yes, there are some standard names which imply string values, as Karl says.
If the standard_name table says 1, that means the quantity is dimensionless,
so it's also
Thank you for the discussion on the number of realizations in an ensemble.
Please may people raise any further concerns about a new standard name:
number_of_realizations
with a canonical unit of
''
and a description of
The number of member realizations within a given ensemble.
This name
Please could any further objections to this proposal be raised, as I would like
this entry added to the standard names list.
thank you
mark
From: CF-metadata [cf-metadata-boun...@cgd.ucar.edu] on behalf of Hedley, Mark
[mark.hed...@metoffice.gov.uk]
Sent: 02
Mark,
I can't comment on usage, but I don't think '-' characters are allowed,
so data_cutoff_time or data_cut_off_time are probably better choices. I
like data_cutoff_time better, but that's just me.
Grace and peace,
Jim
On 10/30/14, 4:40 AM, Hedley, Mark wrote:
Please could any further
I prefer
data_cutoff_time
as well
mark
From: CF-metadata [cf-metadata-boun...@cgd.ucar.edu] on behalf of Jim Biard
[jbi...@cicsnc.org]
Sent: 30 October 2014 13:06
To: cf-metadata@cgd.ucar.edu
Subject: Re: [CF-metadata] GRIB2 data cutoff
Mark,
I can't comment on
My preference is that one explicitly puts in the units. For dimensionless,
1 or is ok for udunits. If the units attribute isnt there, I assume
that the user forgot to specify it, so the units are unknown.
Im not sure what CF actually says, but it would be good to clarify.
John
On Thu, Oct 30,
Dear Birgit
standard name: Ozone number density
alternatively: Ozone number concentration
unit: molecules/m^3
Some ozone satellite instruments (like the ?Stratospheric Aerosol and Gas
Experiment?, SAGE, or the ?Polar Ozone and Aerosol Measurment?, POAM) measure
ozone in their native
CF says that if the units attribute is missing, then the quantity has no
units.
The Conventions document, section 3.1 says:
The|units|attribute is required for all variables that represent
dimensional quantities (except for boundary variables defined
inSection 7.1, Cell
Hi Mark,
It is a worry if the definition is a repetition or variant of the words in the
name. In particular, the word 'realization' will be meaningful to
modelers/forecasters but not universally.
My first desire was to generalize the term (e.g., 'how many entities are in a
collection of
Dear Mark
area_type is given in the standard_name table as having a unit of 1. It is
a categorical string-valued quantity.
Sect 3.1 of CF 1.6 says
Units are not required for dimensionless quantities. A variable with no units
attribute is assumed to be dimensionless. However, a units attribute
Dear Mark
Please may people raise any further concerns about a new standard name:
number_of_realizations
with a canonical unit of
''
and a description of
The number of member realizations within a given ensemble.
My concern is probably the same one as before. Sorry about that. Does
Thank you for the feeedback
John:
I like the text
In a model or operational forecast, the number of member realizations within
a given ensemble. This provides context for any specific realization, for
example orienting a member relative to its original group (even if the group is
no longer
The unit of '1' is generally used to indicate fractions and the like. In
cases where I am storing a raw binary value, I leave off the units attribute,
as the 'number' isn't something that should be treated as a decimal quantity.
This is the same behaviour as I was looking to adopt, but CF
Glad you liked the text!
Regarding 'given ensemble' vs 'original ensemble', how can we resolve the
ambiguity? That is, if you use this attribute, how will the user know what
ensemble the attribute is in reference to?
If the 'common practice among forecasters' (and required capability) is
Hi Mark,
a unit of '' has a definition of '?'
So why don't you propose '?' as the units?
Best
Eizi
2014/10/31 7:21 Hedley, Mark mark.hed...@metoffice.gov.uk:
The unit of '1' is generally used to indicate fractions and the like.
In cases where I am storing a raw binary value, I leave off
Thanks for summing this up so neatly Mark!
We could take the view that the conventions would benefit from the addition
of some text into 3.1 to explicitly make the point about quantities which are
not dimensioned or dimensionless.
We could alternatively defer to udunits as most unit
16 matches
Mail list logo
