The Paris climate agreement aims at holding global warming to well below 2 degrees Celsius and to “pursue efforts” to limit it to 1.5 degrees Celsius. To accomplish this, countries have submitted Intended Nationally Determined Contributions (INDCs) outlining their post-2020 climate action. Here we assess the effect of current INDCs on reducing aggregate greenhouse gas emissions, its implications for achieving the temperature objective of the Paris climate agreement, and potential options for overachievement. The INDCs collectively lower greenhouse gas emissions compared to where current policies stand, but still imply a median warming of 2.6–3.1 degrees Celsius by 2100. More can be achieved, because the agreement stipulates that targets for reducing greenhouse gas emissions are strengthened over time, both in ambition and scope. Substantial enhancement or over-delivery on current INDCs by additional national, sub-national and non-state actions is required to maintain a reasonable chance of meeting the target of keeping warming well below 2 degrees Celsius.
At a glance
- UNFCCC. Adoption of the Paris Agreement. Report No. FCCC/CP/2015/L.9/Rev.1, http://unfccc.int/resource/docs/2015/cop21/eng/l09r01.pdf (UNFCCC, 2015)
- UNFCCC. INDCs as communicated by Parties. http://www4.unfccc.int/submissions/indc/Submission%20Pages/submissions.aspx (2015)
- UNFCCC. United Nations Framework Convention on Climate Change. Report No. FCCC/INFORMAL/84, https://unfccc.int/resource/docs/convkp/conveng.pdf (UNFCCC, 1992)
- A scientific critique of the two-degree climate change target. Nat. Geosci. 9, 13–18 (2016) , , &
- History of the 2°C climate target. Wiley Interdiscip. Rev. Clim. Change 1, 598–605 (2010).
An introduction to the roots of the 2 °C climate target and its development over the past decades
- Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (eds et al.) 1029–1136 (Cambridge Univ. Press, 2013) et al. in
- Stabilizing climate requires near-zero emissions. Geophys. Res. Lett. 35, L04705 (2008) &
- The legacy of our CO2 emissions: a clash of scientific facts, politics and ethics. Clim. Change 133, 361–373 (2015) &
- IPCC. Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC, 2014).
The most recent intergovernmental report synthesizing our current understanding of the physical science and impacts of, and possible solutions to avoid, climate change.
- Greenhouse-gas emission targets for limiting global warming to 2 °C. Nature 458, 1158–1162 (2009) et al.
- Differences between carbon budget estimates unravelled. Nat. Clim. Change 6, 245–252 (2016) et al.
- Persistent growth of CO2 emissions and implications for reaching climate targets. Nat. Geosci. 7, 709–715 (2014) et al.
- Probabilistic cost estimates for climate change mitigation. Nature 493, 79–83 (2013) , , , &
- Economic mitigation challenges: how further delay closes the door for achieving climate targets. Environ. Res. Lett. 8, 034033 (2013) et al.
- Energy system transformations for limiting end-of-century warming to below 1.5 °C. Nat. Clim. Change 5, 519–527 (2015) et al.
- Climate Change 2014: Mitigation of Climate Change. Contribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (eds et al.) 413–510 (Cambridge Univ. Press, 2014) et al. in
- Zero emission targets as long-term global goals for climate protection. Environ. Res. Lett. 10, 105007 (2015).
Study providing insights about the consistency between Article 2 and Article 4 of the UNFCCC Paris Agreement.
- UNEP. The Emissions Gap Report 2015 http://uneplive.unep.org/media/docs/theme/13/EGR_2015_301115_lores.pdf (UNEP, 2015).
An annual assessment tracking climate policy action over the past six years, which provided the basis for the analysis presented in this Perspective
- Climate Analytics, Ecofys, NewClimate Institute & PIK. Climate pledges will bring 2.7°C of warming, potential for more action. Climate Action Tracker http://climateactiontracker.org/news/253/Climate-pledges-will-bring-2.7C-of-warming-potential-for-more-action.html (2015)
- http://www.pbl.nl/en/publications/assessing-intended-nationally-determined-contributions-to-the-paris-climate-agreement (PBL Netherlands Environmental Assessment Agency, 2015) et al. Assessing Intended Nationally Determined Contributions to the Paris Climate Agreement – What are the Projected Global and National Emission Levels for 2025–2030? Report No. PBL 1879,
- IEA. World Energy Outlook 2015. International Energy Agency http://www.worldenergyoutlook.org/resources/energyandclimatechange/ (2015)
- http://www.lse.ac.uk/GranthamInstitute/wp-content/uploads/2015/10/Boyd_Turner_and_Ward_policy_paper_October_2015.pdf (Centre for Climate Change Economics and Policy, and Grantham Research Institute on Climate Change and the Environment, 2015) , & Intended Nationally Determined Contributions: What are the Implications for Greenhouse Gas Emissions in 2030?
- INDC Factsheets. Australian-German Climate and Energy College http://climate-energy-college.net/indc-factsheets (2015)
- DEA. Analyzing the 2030 emissions gap. Danish Energy Agency http://www.ens.dk/gap (2015)
- Climate Interactive. Climate Scoreboard. Climate Interactive https://www.climateinteractive.org/programs/scoreboard/ (2015)
- Can Paris pledges avert severe climate change? Science 350, 1168–1169 (2015) et al.
- UNFCCC. Synthesis Report on the Aggregate Effect of the Intended Nationally Determined Contributions. Report No. FCCC/CP/2015/7, http://unfccc.int/resource/docs/2015/cop21/eng/07.pdf (UNFCCC, 2015)
- Analysis of Scenarios Integrating the INDCs https://ec.europa.eu/jrc/sites/default/files/JRC97845.pdf (Joint Research Centre, 2015) &
- http://www.pbl.nl/en/publications/enhancing-mitigation-ambitions-in-the-major-emitting-countries-analysis-of-current-and-potential-climate-policies (PBL Netherlands Environmental Assessment Agency, 2015) et al. Enhancing Mitigation Ambitions in the Major Emitting Countries: Analysis of Current and Potential Climate Policies. Report No. PBL 1631,
- JRC/PBL. EDGAR version 4.2FT2012 http://edgar.jrc.ec.europa.eu/overview.php?v=GHGts1990-2012 (Joint Research Centre of the European Commission, PBL Netherlands Environmental Assessment Agency, 2014)
- http://www.wri.org/sites/default/files/WRI_WP_InterpretingINDCs.pdf (World Resources Institute, 2015) et al. Interpreting INDCs: Assessing Transparency of Post-2020 Greenhouse Gas Emissions Targets for 8 Top-Emitting Economies (Working Paper)
- World Resources Institute. Paris Contributions Map. CAIT Climate Data Explorer http://cait.wri.org/indc/ (2015)
- ICAO. Assembly Resolutions in Force (as of 4 October 2013). Report No. 10022, http://www.icao.int/publications/documents/10022_en.pdf (ICAO, 2014)
- Greenhouse gas emissions from current and enhanced policies of China until 2030: can emissions peak before 2030? Energy Policy 89, 224–236 (2016) et al.
- http://www.chinacarbon.info/wp-content/uploads/2015/07/Comments-on-Chinas-INDC.pdf (China National Center for Climate Change Strategy and International Cooperation (NCSC), 2015) , & An Analysis of China’s INDC
- http://publications.jrc.ec.europa.eu/repository/bitstream/JRC98451/jrc%20lulucf-indc%20report.pdf (European Union, JRC Science Hub, 2015) & Quantifying the Contribution of the Land Use Sector to the Paris Climate Agreement. Report No. EUR 27561,
- Climate Change 2014: Mitigation of Climate Change. Contribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (eds et al.) 351–411 (Cambridge Univ. Press, 2014) et al. in
- Discrepancies in historical emissions point to a wider 2020 gap between 2 °C benchmarks and aggregated national mitigation pledges. Environ. Res. Lett. 6, 024002 (2011) , , &
- Climate Change 2014: Mitigation of Climate Change. Contribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (eds et al.) 811–922 (Cambridge Univ. Press, 2014) et al. in
- Locked into Copenhagen pledges — implications of short-term emission targets for the cost and feasibility of long-term climate goals. Technolog. Forecast. Soc. Change 90, 8–23 (2015) et al.
- 2020 emissions levels required to limit warming to below 2 °C. Nat. Clim. Change 3, 405–412 (2013) , , &
- Making or breaking climate targets: The AMPERE study on staged accession scenarios for climate policy. Technolog. Forecast. Soc. Change 90, 24–44 (2015) et al.
- Improved representation of investment decisions in assessments of CO2 mitigation. Nat. Clim. Change 5, 436–440 (2015) et al.
- Technology dynamics and greenhouse gas emissions mitigation: a cost assessment. Technol. Forecast. Soc. Change 63, 231–261 (2000) &
- The impact of near-term climate policy choices on technology and emission transition pathways. Technolog. Forecast. Soc. Change 90, 73–88 (2015) et al.
- Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (eds et al.) 33–115 (Cambridge Univ. Press, 2013) et al. in
- UNFCCC. Establishment of an Ad Hoc Working Group on the Durban Platform for Enhanced Action. Draft decision -/CP.17, https://unfccc.int/files/meetings/durban_nov_2011/decisions/application/pdf/cop17_durbanplatform.pdf (UNFCCC, 2011)
- Managing climate risk. Science 294, 786–787 (2001) et al.
- Fossil fuels in a trillion tonne world. Nat. Clim. Change 5, 419–423 (2015) , , &
- IPCC. IPCC Special Report on Carbon Dioxide Capture and Storage. Prepared by Working Group III of the Intergovernmental Panel on Climate Change (eds et al.) (Cambridge Univ. Press, 2005)
- Global Wind Energy Council. Global Statistics http://www.gwec.net/global-figures/graphs/ [accessed 15 October 2015] (2015)
- SolarPower Europe. Global Market Outlook For Solar Power / 2015 - 2019 http://helapco.gr/pdf/Global_Market_Outlook_2015_-2019_lr_v23.pdf (SolarPower Europe, 2015)
- Public perceptions of CCS: emergent themes in pan-European focus groups and implications for communications. Int. J. Greenh. Gas Control 5, 1359–1367 (2011) &
- Biophysical and economic limits to negative CO2 emissions. Nat. Clim. Change 6, 42–50 (2016) et al.
- Bioenergy and climate change mitigation: an assessment. GCB Bioenergy 7, 916–944 (2015) et al.
- Global Energy Assessment: Toward a Sustainable Future (eds et al.) Ch. 20, 1459–1525 (Cambridge Univ. Press, International Institute for Applied Systems Analysis, 2012) et al. in
- IPCC. Special Report on Renewable Energy Sources and Climate Change Mitigation (eds et al. ) http://www.ipcc.ch/report/srren/ (Cambridge Univ. Press, 2011)
- Geosciences after Paris. Nat. Geosci. 9, 187–189 (2016) &
- The contribution of Paris to limit global warming to 2 °C. Environ. Res. Lett. 10, 125002 (2015) et al.
- http://www.climateworks.org/wp-content/uploads/2015/11/Faster-Cleaner-Decarbonization-in-the-Power-Transport-Sectors.pdf (ClimateWorks, NewClimate Institute, Ecofys, Climate Analytics, 2015) et al. Faster and Cleaner: Decarbonization in the Power and Transport Sectors is Surpassing Predictions and Offering Hope for Limiting Warming to 2°C
- Preparation of Intended Nationally Determined Contributions (INDCs) as a Catalyst for National Climate Action http://mitigationpartnership.net/sites/default/files/indc_as_catalyst.pdf (NewClimate Institute, 2015) , , , &
- Climate clubs: can small groups of countries make a big difference in addressing climate change? Rev. Eur. Community Int. Environ. Law 21, 177–192 (2012) , &
- Bridging the greenhouse-gas emissions gap. Nat. Clim. Change 2, 471–474 (2012) , , &
- Towards a new climate diplomacy. Nat. Clim. Change 5, 501–503 (2015) , , &
- UNEP. Climate Commitments of Subnational Actors and Business: A Quantitative Assessment of their Emission Reduction Impact. Report No. DEW/1917/NA, http://apps.unep.org/redirect.php?file=/publications/pmtdocuments/-Climate_Commitments_of_Subnational_Actors_and_Business-2015CCSA_2015.pdf.pdf (United Nations Environment Programme, 2015)
- IPCC in Climate Change 2014: Mitigation of Climate Change. Contribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (eds et al.) 1–33 (Cambridge Univ. Press, 2014)
- UN General Assembly. Transforming our World: the 2030 Agenda for Sustainable Development. Report No. A/RES/70/1, http://www.un.org/ga/search/view_doc.asp?symbol=A/RES/70/1&Lang=E (United Nations, 2015)
- Implications of potentially lower climate sensitivity on climate projections and policy. Environ. Res. Lett. 9, 031003 (2014) , , &
- Global warming under old and new scenarios using IPCC climate sensitivity range estimates. Nat. Clim. Change 2, 248–253 (2012) , &
- Emulating coupled atmosphere-ocean and carbon cycle models with a simpler model, MAGICC6 – part 1: model description and calibration. Atmos. Chem. Phys. 11, 1417–1456 (2011) , &
- http://www.europarl.europa.eu/RegData/etudes/STUD/2015/569964/IPOL_STU(2015)569964_EN.pdf (European Parliament’s Committee on Environment, Public Health and Food Safety, 2015) , , & Emission Reduction Targets for International Aviation and Shipping. Report No. IP/A/ENVI/2015-11,
- https://newclimateinstitute.files.wordpress.com/2015/07/task2c_goodpracticeanalysis_july_2015.pdf (NewClimate Institute, PBL Netherlands Environmental Assessment Agency, International Institute for Applied Systems Analysis, 2015) et al. The Impact of Good Practice Policies on Regional and Global Greenhouse Gas Emissions
- http://www.pbl.nl/sites/default/files/cms/pbl-2015-climate-action-outside-the-unfccc_01188.pdf (PBL Netherlands Environmental Assessment Agency, 2015) , , & Climate Action Outside the UNFCCC. Report No. PBL 1188,
- http://dx.doi.org/10.3334/CDIAC/00001_V2013 (Carbon Dioxide Information Analysis Center, 2013) , & Global, Regional, and National Fossil-Fuel CO2 Emissions
- Global Carbon Budget 2015. Earth Syst. Sci. Data 7, 349–396 (2015).
A yearly authoritative update of global anthropogenic carbon emissions, and natural and anthropogenic sinks
- http://www.forecastingprinciples.com/index.php/forecasting-dictionary [accessed 13 July 2012] (2012) & Forecasting dictionary
- IPCC Special Report on Emissions Scenarios http://www.ipcc.ch/ipccreports/sres/emission/index.php?idp=0 (Cambridge Univ. Press, 2000) &
- IEA. World Energy Outlook 2014 http://www.worldenergyoutlook.org/weo2014/ (International Energy Agency, 2014)
- National post-2020 greenhouse gas targets and diversity-aware leadership. Nat. Clim. Change 5, 1098–1106 (2015) et al.
- UNFCCC. Review of the Implementation of Commitments and Other Provisions of the Convention. Report No. FCCC/CP/2002/8, http://unfccc.int/resource/docs/cop8/08.pdf, 7 (UNFCCC, 2002)
- Supplementary Information (1.5 MB)
This file contains Supplementary Text, Supplementary Figures 1-4, Supplementary Tables 1-6 and Supplementary References.