EDGAR N2O, 1.B.1

[JGuetschow]

EDGAR data for N$_2$O, 1.B.1 is very limited for some countries, thus extrapolation generates most of the data for those countries. The main problem is Croatia, however it's not relevant on the level of aggregate emissions. As CRF data for Croatia has no N2O in 1.B.1 it might be best to just delete the EDGAR data or use linear extrapolation on the EDGAR data (could be a general approach for those countries with only a few years in EDGAR)

[JGuetschow]

The problem persists with the new EDGAR v7.0 data.

[JGuetschow]

By making the following changes the problem has been solved for most countries:

• We extrapolate EDGAR 1.B.1 data with a constant to 1995 if time series start after 1995, so EDGARHYDE can be used for extrapolation for all countries.
• For the last extrapolation step we now use CH4 growth rates instead of CO2

We still have some countries were emissions in the extrapolated part of the time series are much higher than in EDGAR data. This is not nice as we would like to have the time of highest emissions covered by actual data not extrapolated data, but as fugitive emissions have peaked decades ago for many countries (where data are available) the resulting time-series are not unrealistic.

[JGuetschow]

Highest impact countries: Lebanon, Qatar, Suriname, Uruguay

other countries with a short coverage period in EDGAR 8.0 are
Azerbaijan, Bulgaria. Bosnia and Herzegovina, Botswana, Chile, Germany, Spain, Greece, Croatia, Italy, Jordan, Japan, Kazakhstan, Libya, Lithuania, Latvia, Moldova, Montenegro, Niger, Netherlands, Nepal, Portugal, Russia, Serbia, Vatican

Matching problems: Guatemala, Iran

[JGuetschow]

Unfortunately I could not find any information on the methodology used to create the data and the input data sources.