Back to Search
Start Over
Regional trends and drivers of the global methane budget
- Source :
- Global Change Biology, Global Change Biology, Wiley, In press, ⟨10.1111/gcb.15901⟩, Global change biology, vol 28, iss 1, Global Change Biology, 2022, 28 (1), pp.182-200. ⟨10.1111/gcb.15901⟩
-
Abstract
- The ongoing development of the Global Carbon Project (GCP) global methane (CH4 ) budget shows a continuation of increasing CH4 emissions and CH4 accumulation in the atmosphere during 2000-2017. Here, we decompose the global budget into 19 regions (18land and 1 oceanic) and five key source sectors to spatially attribute the observed global trends. A comparison of top-down (TD) (atmospheric and transport model-based) and bottom-up (BU) (inventory- and process model-based) CH4 emission estimates demonstrates robust temporal trends with CH4 emissions increasing in 16 of the 19 regions. Five regions-China, Southeast Asia, USA, South Asia, and Brazil-account for >40% of the global total emissions (their anthropogenic and natural sources together totaling >270Tg CH4 yr-1 in 2008-2017). Two of these regions, China and South Asia, emit predominantly anthropogenic emissions (>75%) and together emit more than 25% of global anthropogenic emissions. China and the Middle East show the largest increases in total emission rates over the 2000 to 2017 period with regional emissions increasing by >20%. In contrast, Europe and Korea and Japan show a steady decline in CH4 emission rates, with total emissions decreasing by ~10% between 2000 and 2017. Coal mining, waste (predominantly solid waste disposal) and livestock (especially enteric fermentation) are dominant drivers of observed emissions increases while declines appear driven by a combination of waste and fossil emission reductions. As such, together these sectors present the greatest risks of further increasing the atmospheric CH4 burden and the greatest opportunities for greenhouse gas abatement.
- Subjects :
- China
Municipal solid waste
Livestock
010504 meteorology & atmospheric sciences
methane emissions
Oceans and Seas
010501 environmental sciences
7. Clean energy
01 natural sciences
Methane
12. Responsible consumption
bottom-up
Atmosphere
chemistry.chemical_compound
Enteric fermentation
Environmental protection
source sectors
Environmental Chemistry
Animals
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment
ComputingMilieux_MISCELLANEOUS
0105 earth and related environmental sciences
General Environmental Science
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere
Global and Planetary Change
regional
Ecology
business.industry
Coal mining
Biological Sciences
Climate Action
natural emissions
Carbon project
chemistry
13. Climate action
Greenhouse gas
top-down
Environmental science
anthropogenic emissions
business
Environmental Sciences
Subjects
Details
- Language :
- English
- ISSN :
- 13652486, 13541013, and 20002017
- Volume :
- 28
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Global Change Biology
- Accession number :
- edsair.doi.dedup.....3db19ec559db1ef5482d3967f9bbef70
- Full Text :
- https://doi.org/10.1111/gcb.15901