%0 Journal Article
%@ 1748-9326
%A Höglund-Isaksson, L.
%D 2017
%F iiasa:14230
%I Institute of Physics Publishing (IOP)
%J Environmental Research Letters
%N 2
%P e024007
%R 10.1088/1748-9326/aa583e
%T Bottom-up simulations of methane and ethane emissions from global oil and gas systems 1980 to 2012
%U https://pure.iiasa.ac.at/id/eprint/14230/
%V 12
%X Existing bottom-up emission inventories of methane from global oil and gas systems do not well explain year-on-year variation in atmospheric methane estimated by top-down models. Using a novel bottom-up approach this study quantifies and attributes methane and ethane emissions from global oil and gas production from 1980 to 2012. Country-specific information on associated gas flows from published sources are combined with inter-annual variations in observed flaring of associated gas from satellite images from 1994 to 2010, to arrive at country-specific annual estimates of methane and ethane emissions from flows of associated gas. Results confirm trends from top-down models and indicate considerably higher methane and ethane emissions from oil production than previously shown in bottom-up inventories for this time period.