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  Pathways limiting warming to 1.5°C: a tale of turning around in no time?

Kriegler, E., Luderer, G., Bauer, N., Baumstark, L., Fujimori, S., Popp, A., Rogelj, J., Strefler, J., Vuuren, D. P. v. (2018): Pathways limiting warming to 1.5°C: a tale of turning around in no time? - Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 376, 2119, 20160457.
https://doi.org/10.1098/rsta.2016.0457

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 Creators:
Kriegler, Elmar1, Author              
Luderer, Gunnar1, Author              
Bauer, Nicolas1, Author              
Baumstark, Lavinia1, Author              
Fujimori, S.2, Author
Popp, Alexander1, Author              
Rogelj, J.2, Author
Strefler, Jessica1, Author              
Vuuren, D. P. van2, Author
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1Potsdam Institute for Climate Impact Research, ou_persistent13              
2External Organizations, ou_persistent22              

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 Abstract: We explore the feasibility of limiting global warming to 1.5°C without overshoot and without the deployment of carbon dioxide removal (CDR) technologies. For this purpose, we perform a sensitivity analysis of four generic emissions reduction measures to identify a lower bound on future CO2 emissions from fossil fuel combustion and industrial processes. Final energy demand reductions and electrification of energy end uses as well as decarbonization of electricity and non-electric energy supply are all considered. We find the lower bound of cumulative fossil fuel and industry CO2 emissions to be 570 GtCO2 for the period 2016–2100, around 250 GtCO2 lower than the lower end of available 1.5°C mitigation pathways generated with integrated assessment models. Estimates of 1.5°C-consistent CO2 budgets are highly uncertain and range between 100 and 900 GtCO2 from 2016 onwards. Based on our sensitivity analysis, limiting warming to 1.5°C will require CDR or terrestrial net carbon uptake if 1.5°C-consistent budgets are smaller than 650 GtCO2. The earlier CDR is deployed, the more it neutralizes post-2020 emissions rather than producing net negative emissions. Nevertheless, if the 1.5°C budget is smaller than 550 GtCO2, temporary overshoot of the 1.5°C limit becomes unavoidable if CDR cannot be ramped up faster than to 4 GtCO2 in 2040 and 10 GtCO2 in 2050.

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 Dates: 2018
 Publication Status: Finally published
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1098/rsta.2016.0457
PIKDOMAIN: Sustainable Solutions - Research Domain III
eDoc: 8037
Research topic keyword: 1.5/2°C limit
Research topic keyword: Mitigation
Model / method: REMIND
Model / method: MAgPIE
Regional keyword: Global
Organisational keyword: RD3 - Transformation Pathways
Working Group: Energy Systems
Working Group: Research Software Engineering for Transformation Pathways
Working Group: Land-Use Management
 Degree: -

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Title: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Source Genre: Journal, SCI, Scopus, p3
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Pages: - Volume / Issue: 376 (2119) Sequence Number: 20160457 Start / End Page: - Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/1509235