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openclimatedata / globalwarmingpotentials

Global Warming Potentials as assessed by the IPCC in CSV format, and as Python and Node modules
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Handling of < values of GWPs #8

Closed rgieseke closed 2 years ago

rgieseke commented 3 years ago

Some values are only given as < 1 or < 2500

In some cases these have been added as 1. See e.g. https://github.com/openscm/openscm-units/pull/23#discussion_r609429037

One option might be to leave them out generally or list this somehow in the Readme.

danielhuppmann commented 3 years ago

Interesting point, hadn't realized this... Would be interesting to know if it is 1 in the sense of the ECB inflation rate target (below, but close to) or the Paris Agreement sense (well below)...

My preference would be to use NaN if no exact value can be given. When using that as input for pint and iam_units at least, this approach would result in an explicit error message if a user tried to convert that species.

znicholls commented 3 years ago

We used 1 as the upper-bound i.e. worst case. For these species, the CO2 equivalent is always so tiny that it's not worth worrying about (any decision is fine).