Global annual methane emissions and sinks 2008-2017, by source

Volume of average annual methane emissions and sinks worldwide from 2008 to 2017, by broad source

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Release date

July 2020



Survey time period

2008 to 2017

Supplementary notes

Figures originally given in teragrams, but have been displayed in megatons for ease of understanding (1 teragram = 1 megaton). For display purposes, sinks have been displayed as a negative value to indicate their removal of methane from the atmosphere.

Bottom-up estimates are based on ground-level calculations of potential emissions, whereas top-down estimates are based on measurements taken from the atmosphere. Both forms have limitations, for example bottom-up estimates may overlook leaks, whereas top-down estimates are less-reliable at indicating long-term emissions, therefore figures are often studied in unison.

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