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Global roll-out of comprehensive policy measures may aid in bridging emissions gap

Journal Article · · Nature Communications
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  1. Netherlands Environmental Assessment Agency, Hague (Netherlands); Utrecht University (Netherlands)
  2. Euro-Mediterranean Center on Climate Change (CMCC), Milan (Italy)
  3. Federal Univ. of Rio de Janeiro (Brazil)
  4. Potsdam Institute for Climate Impact Research, Potsdam (Germany)
  5. European Commission, Seville (Spain)
  6. Netherlands Environmental Assessment Agency, Hague (Netherlands); Vrije Univ., Amsterdam (Netherlands)
  7. E3Modelling S.A., Athens (Greece)
  8. International Institute for Applied Systems Analysis (IIASA), Laxenburg (Austria)
  9. International Institute for Applied Systems Analysis (IIASA), Laxenburg (Austria); Kyoto Univ. (Japan); National Institute for Environmental Studies (NIES), Tsukuba (Japan)
  10. Imperial College, London (United Kingdom)
  11. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Univ. of Maryland, College Park, MD (United States)
  12. Potsdam Institute for Climate Impact Research, Potsdam (Germany); Univ. of Potsdam (Germany)
  13. Kyoto Univ. (Japan)
  14. National Institute for Environmental Studies (NIES), Tsukuba (Japan); Institute for Global Environmental Strategies, Hayama (Japan)
  15. Euro-Mediterranean Center on Climate Change (CMCC), Milan (Italy); Polytechnic Univ. of Milan, (Italy)

Closing the emissions gap between Nationally Determined Contributions (NDCs) and the global emissions levels needed to achieve the Paris Agreement’s climate goals will require a comprehensive package of policy measures. National and sectoral policies can help fill the gap, but success stories in one country cannot be automatically replicated in other countries. They need to be adapted to the local context. Here, we develop a new Bridge scenario based on nationally relevant, short-term measures informed by interactions with country experts. These good practice policies are rolled out globally between now and 2030 and combined with carbon pricing thereafter. We implement this scenario with an ensemble of global integrated assessment models. We show that the Bridge scenario closes two-thirds of the emissions gap between NDC and 2°C scenarios by 2030 and enables a pathway in line with the 2 °C goal when combined with the necessary long-term changes, i.e. more comprehensive pricing measures after 2030. The Bridge scenario leads to a scale-up of renewable energy (reaching 52%-88% of global electricity supply by 2050), electrification of end-uses, efficiency improvements in energy demand sectors, and enhanced afforestation and reforestation. Our analysis suggests that early action via good-practice policies is less costly than a delay in global climate cooperation.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE; European Union
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1845007
Report Number(s):
PNNL-ACT-SA-10536
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 12; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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