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  Aligning climate scenarios to emissions inventories shifts global benchmarks

Gidden, M. J., Gasser, T., Grassi, G., Forsell, N., Janssens, I., Lamb, W. F., Minx, J. C., Nicholls, Z., Steinhauser, J., Riahi, K. (2023): Aligning climate scenarios to emissions inventories shifts global benchmarks. - Nature, 624, 102-108.
https://doi.org/10.1038/s41586-023-06724-y

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 ???ViewItemFull_lblCreators???:
Gidden, Matthew J.1, ???ENUM_CREATORROLE_AUTHOR???
Gasser, Thomas1, ???ENUM_CREATORROLE_AUTHOR???
Grassi, Giacomo1, ???ENUM_CREATORROLE_AUTHOR???
Forsell, Nicklas1, ???ENUM_CREATORROLE_AUTHOR???
Janssens, Iris1, ???ENUM_CREATORROLE_AUTHOR???
Lamb, William F.1, ???ENUM_CREATORROLE_AUTHOR???
Minx, Jan C.1, ???ENUM_CREATORROLE_AUTHOR???
Nicholls, Zebedee1, ???ENUM_CREATORROLE_AUTHOR???
Steinhauser, Jan2, ???ENUM_CREATORROLE_AUTHOR???           
Riahi, Keywan1, ???ENUM_CREATORROLE_AUTHOR???
???ViewItemFull_lblAffiliations???:
1External Organizations, ou_persistent22              
2Potsdam Institute for Climate Impact Research, ou_persistent13              

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 ???ViewItemFull_lblAbstract???: Taking stock of global progress towards achieving the Paris Agreement requires consistently measuring aggregate national actions and pledges against modelled mitigation pathways1. However, national greenhouse gas inventories (NGHGIs) and scientific assessments of anthropogenic emissions follow different accounting conventions for land-based carbon fluxes resulting in a large difference in the present emission estimates2,3, a gap that will evolve over time. Using state-of-the-art methodologies4 and a land carbon-cycle emulator5, we align the Intergovernmental Panel on Climate Change (IPCC)-assessed mitigation pathways with the NGHGIs to make a comparison. We find that the key global mitigation benchmarks become harder to achieve when calculated using the NGHGI conventions, requiring both earlier net-zero CO2 timing and lower cumulative emissions. Furthermore, weakening natural carbon removal processes such as carbon fertilization can mask anthropogenic land-based removal efforts, with the result that land-based carbon fluxes in NGHGIs may ultimately become sources of emissions by 2100. Our results are important for the Global Stocktake6, suggesting that nations will need to increase the collective ambition of their climate targets to remain consistent with the global temperature goals.

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???ViewItemFull_lblLanguages???: eng - English
 ???ViewItemFull_lblDates???: 2023-02-132023-10-062023-11-222023-12-07
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 ???ViewItemFull_lblIdentifiers???: ???ENUM_IDENTIFIERTYPE_DOI???: 10.1038/s41586-023-06724-y
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???ENUM_IDENTIFIERTYPE_ORGANISATIONALK???: RD3 - Transformation Pathways
???ENUM_IDENTIFIERTYPE_PIKDOMAIN???: RD3 - Transformation Pathways
???ENUM_IDENTIFIERTYPE_WORKINGGROUP???: Land-Use Management
???ENUM_IDENTIFIERTYPE_MODELMETHOD???: Quantitative Methods
???ENUM_IDENTIFIERTYPE_REGIONALK???: Global
???ENUM_IDENTIFIERTYPE_RESEARCHTK???: Mitigation
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???ENUM_IDENTIFIERTYPE_RESEARCHTK???: Decarbonization
???ENUM_IDENTIFIERTYPE_OATYPE???: Hybrid Open Access
???ENUM_IDENTIFIERTYPE_PIKDOMAIN???: RD5 - Climate Economics and Policy - MCC Berlin
???ENUM_IDENTIFIERTYPE_ORGANISATIONALK???: RD5 - Climate Economics and Policy - MCC Berlin
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???project_info_title??? : RESCUE
???project_info_grant_id??? : 101056939
???project_info_funding_info_program_title??? : Horizon Europe (HE)
???project_info_funding_info_organization_title??? : European Commission (EC)
???project_info_title??? : ESM2025
???project_info_grant_id??? : 101003536
???project_info_funding_info_program_title??? : Horizon 2020 (H2020)
???project_info_funding_info_organization_title??? : European Commission (EC)

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???ViewItemFull_lblSourceTitle???: Nature
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