[CF-metadata] [Standard name request] property changes over time

From: Paul.Durack at csiro.au <Paul.Durack>
Date: Wed, 30 Mar 2011 10:01:17 +1100

Thanks for the heads up Jonathan..

I personally feel like there is some duplication in the notation below.. and I'd prefer to use a "standard" *_change suffix for data that I create, and then abide by the conventions regarding time/climatology attributes to describe these..

What specifically do I need to do to propose this *_change suffix as a new standard.. Should I move/replicate this thread across to the CF Trac Website?

Cheers,

P

-----Original Message-----
From: Jonathan Gregory [mailto:j.m.gregory at reading.ac.uk]
Sent: Friday, March 25, 2011 5:02 AM
To: Durack, Paul (CMAR, Hobart)
Cc: CF-metadata at cgd.ucar.edu
Subject: Re: [CF-metadata] [Standard name request] property changes over time

Dear Paul

I think this is more systematic than you suspect!

* It is only sea level change with has _change at the end. These quantities
only have meaning as "change", not as an absolute quantity. So the "change"
there is part of the name of the basic quantity.

* change_[over_X_]in is a prefix which indicates the difference in quantity
between two circumstances, such as two times.

* tendency_in is a prefix which indicates the time-derivative of the quantity.
It has the units of the quantity multiplied by reciprocal time.

The period over which a time-change or tendency is calculated is indicated
by the time bounds or climatological bounds. If it's an instantaneous tendency,
it applies at the time coordinate. This distinction is indicated by
cell_methods.

Best wishes

Jonathan
Received on Tue Mar 29 2011 - 17:01:17 BST