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Article (PDF, 616 KB).pdf

acp-15-2595-2015.pdf
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🔗 Source: acp.copernicus.org
📊 Size: 616 KB
📄 Pages: 18 pages
⬇️ Downloads: 103

Summary

Atmospheric methane (CH4) increased from ~900 ppb in 1900 to ~1800 ppb in 2010. The contributions of various methane sources and sinks to this increase are poorly understood. Researchers used a chemistry-transport model to simulate atmospheric CH4 concentrations from 1910-2010, comparing them to ice core and firn air records, and direct measurements. The global total CH4 emission doubled from ~290 to ~580 Tg yr−1 during this period. The increase in emissions from 1940-1990 was primarily attributed to biomass burning, while the total lifetime of CH4 shortened from 9.4 yr to 9 yr due to increased atomic chlorine radicals and average air temperature.

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Description

Atmospheric methane (CH4) increased from ~900 ppb in 1900 to ~1800 ppb in 2010.

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  • File Format: PDF
  • File Size: 616 KB
  • Pages: 18
  • Language: EN
  • Total Downloads: 103
  • Last Updated: 1 week ago

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