Regional trends and drivers of the global methane budget

Regional trends and drivers of the global methane budget

© 2021 The Authors. Global Change Biology published by John Wiley & Sons Ltd. This article has been contributed to by US Government employees and their work is in the public domain in the USA.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 28(2022), 1 vom: 15. Jan., Seite 182-200
1. Verfasser: Stavert, Ann R (VerfasserIn)
Weitere Verfasser: Saunois, Marielle, Canadell, Josep G, Poulter, Benjamin, Jackson, Robert B, Regnier, Pierre, Lauerwald, Ronny, Raymond, Peter A, Allen, George H, Patra, Prabir K, Bergamaschi, Peter, Bousquet, Phillipe, Chandra, Naveen, Ciais, Philippe, Gustafson, Adrian, Ishizawa, Misa, Ito, Akihiko, Kleinen, Thomas, Maksyutov, Shamil, McNorton, Joe, Melton, Joe R, Müller, Jurek, Niwa, Yosuke, Peng, Shushi, Riley, William J, Segers, Arjo, Tian, Hanqin, Tsuruta, Aki, Yin, Yi, Zhang, Zhen, Zheng, Bo, Zhuang, Qianlai
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article anthropogenic emissions bottom-up methane emissions natural emissions regional source sectors top-down Methane OP0UW79H66
Beschreibung
Zusammenfassung:© 2021 The Authors. Global Change Biology published by John Wiley & Sons Ltd. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
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 (18 land 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 >270 Tg 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
Beschreibung:Date Completed 03.01.2022
Date Revised 31.07.2022
published: Print-Electronic
Citation Status MEDLINE
ISSN:1365-2486
DOI:10.1111/gcb.15901