Show simple item record

dc.contributor.authorPeters, Glen Philip
dc.contributor.authorEngelen, Richard
dc.contributor.authorHouweling, Sander
dc.contributor.authorBrunner, Dominik
dc.contributor.authorTsuruta, Aki
dc.contributor.authorMatthews, Bradley
dc.contributor.authorPatra, Prabir K.
dc.contributor.authorBelikov, Dmitry
dc.contributor.authorThompson, Rona Louise
dc.contributor.authorHoglund-Isaksson, Lena
dc.contributor.authorZhang, Wenxin
dc.contributor.authorSegers, Arjo
dc.contributor.authorEtiope, Giuseppe
dc.contributor.authorCiotoli, Giancarlo
dc.contributor.authorPeylin, Philippe
dc.contributor.authorChevallier, Frédéric
dc.contributor.authorAalto, Tuula
dc.contributor.authorAndrew, Robbie
dc.contributor.authorBastviken, David
dc.contributor.authorBerchet, Antoine
dc.contributor.authorBroquet, Gregoire
dc.contributor.authorConchedda, Giulia
dc.contributor.authorDellaert, Stijn N. C.
dc.contributor.authorvan der Gon, Hugo Denier
dc.contributor.authorGütschow, Johannes
dc.contributor.authorHaussaire, Jean-Matthieu
dc.contributor.authorLauerwald, Ronny
dc.contributor.authorMarkkanen, Tiina
dc.contributor.authorvan Peet, Jacob C. A.
dc.contributor.authorPison, Isabelle
dc.contributor.authorRegnier, Pierre
dc.contributor.authorSollum, Espen
dc.contributor.authorScholze, Marko
dc.contributor.authorTenkanen, Maria
dc.contributor.authorTubiello, Francesco N.
dc.contributor.authorvan der Werf, Guido R.
dc.contributor.authorWorden, John R.
dc.date.accessioned2024-11-20T11:44:16Z
dc.date.available2024-11-20T11:44:16Z
dc.date.created2024-10-07T13:10:45Z
dc.date.issued2024
dc.identifier.citationEarth System Science Data. 2024, 16 (9), 4325-4350.en_US
dc.identifier.issn1866-3508
dc.identifier.urihttps://hdl.handle.net/11250/3165720
dc.description.abstractMonitoring the spatial distribution and trends in surface greenhouse gas (GHG) fluxes, as well as flux attribution to natural and anthropogenic processes, is essential to track progress under the Paris Agreement and to inform its global stocktake. This study updates earlier syntheses (Petrescu et al., 2020, 2021, 2023), provides a consolidated synthesis of CH4 emissions using bottom-up (BU) and top-down (TD) approaches for the European Union (EU), and is expanded to include seven additional countries with large anthropogenic and/or natural emissions (the USA, Brazil, China, India, Indonesia, Russia, and the Democratic Republic of the Congo (DR Congo)). Our aim is to demonstrate the use of different emission estimates to help improve national GHG emission inventories for a diverse geographical range of stakeholders. We use updated national GHG inventories (NGHGIs) reported by Annex I parties under the United Nations Framework Convention on Climate Change (UNFCCC) in 2023 and the latest available biennial update reports (BURs) reported by non-Annex I parties. Comparing NGHGIs with other approaches highlights that different system boundaries are a key source of divergence. A key system boundary difference is whether anthropogenic and natural fluxes are included and, if they are, how fluxes belonging to these two sources are partitioned. Over the studied period, the total CH4 emission estimates in the EU, the USA, and Russia show a steady decreasing trend since 1990, while for the non-Annex I emitters analyzed in this study, Brazil, China, India, Indonesia, and DR Congo, CH4 emissions have generally increased. Quantitatively, in the EU the mean of 2015–2020 anthropogenic UNFCCC NGHGIs (15±1.8 Tg CH4 yr−1) and the mean of the BU CH4 emissions (17.8 (16–19) Tg CH4 yr−1) generally agree on the magnitude, while inversions show higher emission estimates (medians of 21 (19–22) Tg CH4 yr−1 and 24 (22–25) Tg CH4 yr−1 for the three regional and six global inversions, respectively), as they include natural emissions, which for the EU were quantified at 6.6 Tg CH4 yr−1 (Petrescu et al., 2023). Similarly, for the other Annex I parties in this study (the USA and Russia), the gap between the BU anthropogenic and total TD emissions is partly explained by the natural emissions. For the non-Annex I parties, anthropogenic CH4 estimates from UNFCCC BURs show large differences compared to the other global-inventory-based estimates and even more compared to atmospheric ones. This poses an important potential challenge to monitoring the progress of the global CH4 pledge and the global stocktake. Our analysis provides a useful baseline to prepare for the influx of inventories from non-Annex I parties as regular reporting starts under the enhanced transparency framework of the Paris Agreement. By systematically comparing the BU and TD methods, this study provides recommendations for more robust comparisons of available data sources and hopes to steadily engage more parties in using observational methods to complement their UNFCCC inventories, as well as considering their natural emissions. With anticipated improvements in atmospheric modeling and observations, as well as modeling of natural fluxes, future development needs to resolve knowledge gaps in the BU and TD approaches and to better quantify the remaining uncertainty. TD methods may emerge as a powerful tool to help improve NGHGIs of CH4 emissions, but further confidence is needed in the comparability and robustness of the estimates. The referenced datasets related to figures are available at https://doi.org/10.5281/zenodo.12818506 (Petrescu et al., 2024).en_US
dc.description.abstractComparison of observation- and inventory-based methane emissions for eight large global emittersen_US
dc.language.isoengen_US
dc.publisherCopernicus Publicationsen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleComparison of observation- and inventory-based methane emissions for eight large global emittersen_US
dc.title.alternativeComparison of observation- and inventory-based methane emissions for eight large global emittersen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber4325-4350en_US
dc.source.volume16en_US
dc.source.journalEarth System Science Dataen_US
dc.source.issue9en_US
dc.identifier.doi10.5194/essd-16-4325-2024
dc.identifier.cristin2310114
dc.relation.projectEC/H2020/958927en_US
dc.relation.projectEU – Horisont Europa (EC/HEU): 101081395en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal