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Latest results from the global #methane budget project is out. Key insights:
1) Fossil fuel, agriculture, & wetlands responsible for ~20%, 40%, and 30% of emissions.
2) Recent increase in atmospheric levels equally from fossil & agricultural sources. https://iopscience.iop.org/article/10.1088/1748-9326/ab9ed2
1) Fossil fuel, agriculture, & wetlands responsible for ~20%, 40%, and 30% of emissions.
2) Recent increase in atmospheric levels equally from fossil & agricultural sources. https://iopscience.iop.org/article/10.1088/1748-9326/ab9ed2
Increases in #methane emissions across sectors vary by region:
Big
in fossil #methane: US/North Am., China, and Africa/Middle East (lesser extent).
Bigin agriculture: Africa/ME, India/SE Asia
Q: Did global #methane from biomass burning really decrease in 2017?
Big
in fossil #methane: US/North Am., China, and Africa/Middle East (lesser extent). Big
in agriculture: Africa/ME, India/SE AsiaQ: Did global #methane from biomass burning really decrease in 2017?
Caveat: A recent study that used ice core data to independently analyze atmospheric methane showed contribution from fossil fuels to be ~177 Tg CH4/yr between 2003 & 2012.
This is ~60% lower than the estimates by the global methane project. https://www.nature.com/articles/s41586-020-1991-8
This is ~60% lower than the estimates by the global methane project. https://www.nature.com/articles/s41586-020-1991-8
In parallel, there is also evidence that at least US O&G methane emissions are underestimated by ~60%.
Is this just a coincidence or an indication that the global methane budget is under-estimating #methane emissions from fossil fuels?
I'm not sure yet. https://science.sciencemag.org/content/361/6398/186
Is this just a coincidence or an indication that the global methane budget is under-estimating #methane emissions from fossil fuels?
I'm not sure yet. https://science.sciencemag.org/content/361/6398/186
