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Global methane emissions from the world coal industry.

P C Thakur1, I J Graham-Bryce, W G Karis

  • 1, .

Environmental Monitoring and Assessment
|November 12, 2013
PubMed
Summary

The International Energy Agency

Area of Science:

  • Environmental Science
  • Energy Policy
  • Atmospheric Chemistry

Background:

  • Methane emissions from coal are a significant contributor to global greenhouse gases.
  • Accurate estimation of these emissions is crucial for climate change mitigation strategies.
  • Previous estimations of coal-related methane emissions varied considerably.

Purpose of the Study:

  • To provide a comprehensive and up-to-date estimation of global methane emissions from the coal industry.
  • To identify key contributing countries and factors influencing methane release.
  • To compare these findings with previous indirect estimations.

Main Methods:

  • Utilized data from the Coal Industry Advisory Board (CIAB) of the International Energy Agency (IEA).
  • Compiled methane emissions data for major coal-producing countries in 1990.

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  • Estimated emissions for countries lacking direct data using a linear correlation based on mining depth.
  • Prorated emissions based on coal production to estimate global totals.

    • Main Results:

    • Total global methane emissions from coal mining, treatment, and storage were estimated at approximately 25 million tonnes/year in 1990.
    • Net annual discharge to the atmosphere was calculated to be 24 million tonnes, with 1 million tonnes utilized by the industry.
    • These emissions represent only 4-6% of global methane emissions, a lower figure than some prior indirect estimates.

    Conclusions:

    • The study provides the best available international data on coal industry methane emissions for 1990.
    • Global methane emissions from coal are substantial but constitute a smaller fraction of total global methane emissions than previously thought.
    • Accurate data are essential for effective climate policy and emission reduction targets.