Fig. 1: Recent inventories of the three main anthropogenic methane sources in Alberta and Saskatchewan. | Communications Earth & Environment

Fig. 1: Recent inventories of the three main anthropogenic methane sources in Alberta and Saskatchewan.

From: Hybrid bottom-up and top-down framework resolves discrepancies in Canada’s oil and gas methane inventories

Fig. 1

The recent changes are primarily due to revised methods for calculating fugitive emissions in the energy sector. Sectoral emissions are categorized as follows: energy (blue), agriculture (green), and waste management (yellow). Each inventory edition includes data up to two years before its release; for instance, the 2024 NIR includes data up to 2022. Methodological changes are applied retroactively, updating all yearly emission estimates back to 1990. The pie chart data cover the years 2010 to 2019, based on the 2024 NIR. Pumpjacks extract oil and associated gas near northwest of Calgary, Alberta. Pumpjacks and landfill photos by Jeff McIntosh. Livestock photo by Meghan Flood/Environment and Climate Change Canada.

Back to article page