This is a list of abbreviations relating to climate change causation, adaptation and mitigation.

A ADP - Ad Hoc Working Group on the Durban Platform for Enhanced Action AGN - African Group of Negotiators APA - Ad Hoc Working Group on the Paris Agreement Climate Dictionary, Ad Hoc Working Group on the Paris Agreement APP - Asia-Pacific Partnership on Clean Development and Climate AR4 - Fourth Assessment Report of the IPCC (2007) AR5 - Fifth Assessment Report of the IPCC (2014) AR5 SYR - Synthesis Report of AR5 IPCC, AR5 Synthesis Report: Climate Change 2014 AR6 - Sixth Assessment Report of the IPCC (published on 9 August 2021) AWG-KP - Ad Hoc Working Group on further Commitments for Annex I Parties under the Kyoto Protocol AWG-LCA - Ad Hoc Working Group on Long-term Cooperative Action AYCC - Australian Youth Climate Coalition

B BAP - Bali Action Plan

C C&C - Contraction & Convergence, a global CO2 emissions management model promoted by the Global Commons Institute CAIT - The World Resources Institute's Climate Data Explorer archive WRI, CAIT Climate Data Explorer, accessed 6 May 2020 CAPP - Climate Action Pacific Partnership COP23, What is the Climate Action Pacific Partnership?, accessed 14 July 2020 CAPP II - Climate Action Pacific Partnership (CAPP) Conference II (2018) CAPP III - Third meeting of the Climate Action Pacific Partnership Conference (29-30 April 2019) CCA - Climate Change Agreement (UK) CCAFS - Climate Change, Agriculture and Food Security Research Program Research Program on Climate Change, Agriculture and Food Security, accessed 9 August 2020 CCAF - Climate Change Action Fund (Australia) CCC - Committee on Climate Change (UK) CCCEP - Centre for Climate Change Economics and Policy CCCR - Canada's Changing Climate Report CCCS - Centre for Climate Change Studies, University of Dar es SalaamCentre for Climate Change Studies, University of Dar es Salaam CCF - The Scottish Government's Climate Challenge Fund CCIA - Climate Change in Australia CC:iNet - Climate Change Information Network Climate Change Information Network, Contributing to CC:iNet - A quick-start guide CCL - Climate Change Levy (UK) CCl2F2 - Dichlorodifluoromethane (greenhouse gas) CCLS - Cambridge Climate Lecture Series CCRA - Climate Change Risk Assessment CCS - Carbon Capture and Storage CCSO - Climate Change Support Office, within the United States' Department of State.Biden, J., Executive Order 14027—Establishment of the Climate Change Support Office, published on 7 May 2021, accessed on 12 March 2025 CCUS - Carbon capture, utilization, and sequestration CDM - Clean Development Mechanism CDP - Organisation formerly known as the Carbon Disclosure Project CDR - Carbon dioxide removal CER - Certified Emission Reduction CFC - Chlorofluorocarbon CFRF - Climate Financial Risk Forum (UK) CF4 - Carbon tetrafluoride or tetrafluoromethane (greenhouse gas) CGE - Consultative Group of Experts Secretariat of the United Nations Framework Convention on Climate Change, Updated work plan of the Consultative Group of Experts for 2020, accessed 15 August 2020 CHClF2 - Chlorodifluoromethane (greenhouse gas) CH4 - Methane CINC - Interdepartmental Committee of Climate Negotiators CLP - The Carbon Literacy Project (CLP) CMA - Meeting of the Parties to the Paris Agreement CMA1 - First meeting of the Parties to the Paris Agreement (7-18 November 2016) CMA1.2 - The second part of the first session of the Conference of the meeting of the Parties to the Paris Agreement (6-17 November 2017) CMA1.3 - The third part of the first session of the Conference of the meeting of the Parties to the Paris Agreement (2-14 December 2018) CMA2 - Second meeting of the Parties to the Paris Agreement (2–13 December 2019) CMA3 - Third meeting of the Parties to the Paris Agreement (postponed to 1–12 December 2021) CMIP - Coupled Model Intercomparison Project CMIP5 - Coupled Model Intercomparison Project, Phase 5 Lawrence Livermore National Laboratory, CMIP5 - Coupled Model Intercomparison Project Phase 5 - Overview, accessed 9 August 2020 CMP - Conference of the Parties Serving as the Meeting of Parties to the Kyoto Protocol CMP9 - 9th meeting of the Parties to the Kyoto Protocol (11-23 November 2013) CMP10 - 10th meeting of the Parties to the Kyoto Protocol (1-12 December 2014) CMP11 - 11th meeting of the Parties to the Kyoto Protocol (30 November-12 December 2015) CMP12 - 12th meeting of the Parties to the Kyoto Protocol (7-18 November 2016) CMP13 - 13th meeting of the Parties to the Kyoto Protocol (6-17 November 2017) CMP14 - 14th meeting of the Parties to the Kyoto Protocol (2-15 December 2018) CMP15 - 15th meeting of the Parties to the Kyoto Protocol (2–13 December 2019) CMP16 - 16th meeting of the Parties to the Kyoto Protocol (postponed to 1–12 December 2021) CNZ - Carbon Net Zero Crown Commercial Service, Carbon net zero funding and grants, updated as of 5 January 2023, accessed 17 January 2023 CO2 - Carbon dioxide CO2-e - Carbon dioxide equivalent, also CO2-eq Statistical Office of the European Union (Eurostat), Glossary: Carbon dioxide equivalent, updated 9 March 2017, accessed 10 August 2020 CoM - Covenant of Mayors for Climate and Energy (Europe) European Commission, Covenant of Mayors, EU Science Hub, published 8 July 2019, accessed 10 October 2020 COP - Conference of the Parties [to the UNFCCC] COP1 - First UNFCCC Conference of the Parties (28 March to 7 April 1995) COP2 - Second UNFCCC Conference of the Parties (8-18 July 1996) COP3 - Third UNFCCC Conference of the Parties (1-10 December 1997) Official Web Site of the Third Conference of the Parties, accessed 9 August 2020 COP4 - Fourth UNFCCC Conference of the Parties (2-14 November 1998) COP5 - Fifth UNFCCC Conference of the Parties (25 October to 5 November 1999) COP6 - Sixth UNFCCC Conference of the Parties (13–25 November 2000) COP6-bis - Resumed Session of COP6 (16-27 July 2001) Sixth Conference of the Parties to the UN Framework Convention on Climate Change - Resumed Session, accessed 27 May 2020 COP7 - Seventh UNFCCC Conference of the Parties (29 October - 10 November 2001) COP8 - Eighth UNFCCC Conference of the Parties (23 October - 1 November 2002) COP9 - Ninth UNFCCC Conference of the Parties (1-12 December 2003) COP10 - Tenth UNFCCC Conference of the Parties (6-14 December 2004) COP11 - Eleventh UNFCCC Conference of the Parties (28 November - 9 December 2005) COP12 - Twelfth UNFCCC Conference of the Parties (6-17 November 2006) COP13 - 13th UNFCCC Conference of the Parties (3-15 December 2007) COP14 - 14th UNFCCC Conference of the Parties (1-12 December 2008) COP15 - 15th UNFCCC Conference of the Parties (7-18 December 2009) COP16 - 16th UNFCCC Conference of the Parties (29 November - 10 December 2010) COP17 - 17th UNFCCC Conference of the Parties (28 November - 11 December 2011) COP18 - 18th UNFCCC Conference of the Parties (26 November - 6 December 2012) COP19 - 19th UNFCCC Conference of the Parties (11-23 November 2013) COP20 - 20th UNFCCC Conference of the Parties (1-12 December 2014) COP21 - 21st UNFCCC Conference of the Parties (30 November-12 December 2015) COP22 - 22nd UNFCCC Conference of the Parties (7-18 November 2016) COP23 - 23rd UNFCCC Conference of the Parties (6-17 November 2017) COP24 - 24th UNFCCC Conference of the Parties (2-15 December 2018) COP25 - 25th UNFCCC Conference of the Parties (2-13 December 2019) COP26 - 26th UNFCCC Conference of the Parties (1-12 November 2021) COP27 - 27th UNFCCC Conference of the Parties (6-18 November 2022) COP28 - 28th UNFCCC Conference of the Parties (30 November - 13 December 2023), held in the United Arab Emirates Time Out Dubai, COP 28 climate change event to take place at Expo City Dubai, published 23 June 2022, accessed 29 October 2022 COP29 - 29th UNFCCC Conference of the Parties (11-22 November 2024), held in Baku COP30 - 2025 UNFCCC Conference of the Parties (10-21 November 2025),UN Climate Change Conference UK 2021, Focus of Energy Transition Council (ETC), published 4 November 2021, accessed 29 October 2022 held in Belém, Brazil.Reuters, Brazil says UN confirmed Amazonian city of Belem as COP30 host, published 26 May 2023, accessed 8 August 2023 COP31 - anticipated 2026 UNFCCC Conference of the Parties, to be held in Antalya, Turkey from 9 to 20 November, 2026 COP32 - anticipated 2027 UNFCCC Conference of the Parties, to be held in Addis Ababa, Ethiopia COP33 - anticipated 2028 UNFCCC Conference of the Parties. Indian Prime Minister Narendra Modi has proposed hosting COP33 in India.TerraGreen, India’s Road Map to COP33, published on 19 March 2024, accessed on 31 October 2025 CORSIA - Carbon Offsetting and Reduction Scheme for International Aviation CPA - Carbon Pricing Act (Singapore) CPRS - Carbon Pollution Reduction Scheme (Australia) CRC - CRC Energy Efficiency Scheme, formerly Carbon Reduction Commitment (UK) CREWS - Climate Risk and Early Warning Systems Ministry for Europe and Foreign Affairs (France), Climate Risk and Early Warning Systems, accessed 9 August 2020 CRU - Climatic Research Unit at the University of East Anglia CRU TS - Climatic Research Unit Time Series datasets University of East Anglia, High-resolution gridded datasets (and derived products), accessed 20 May 2020 CSA - Climate-Smart Agriculture CVF - Climate Vulnerable Forum C40 - group of cities (now 96) focused on fighting the climate crisis: see C40 Cities Climate Leadership Group

D DCCEEW - Department of Climate Change, Energy, the Environment and Water in Australia DECC - Department of Energy and Climate Change (UK), now Department for Business, Energy and Industrial Strategy

E ECI - Environmental Change Institute at the University of Oxford ECIU - Energy and Climate Intelligence Unit EPR - Extended Producer Responsibility ETC - Energy Transition Council ETS - Emissions Trading System ETSWAP - Emissions Trading Scheme Workflow Automation Project operated by the UK's Environment Agency

F FAR - First Assessment Report of the IPCC (1990) F-gas - Fluorinated gas FICER - Fund for Innovative Climate and Energy Research FOLU - Forestry and other land use FFF - Fridays for Future

G GCF - Green Climate Fund GCoM - Global Covenant of Mayors for Climate and Energy GHG - Greenhouse gas GST - Global StocktakeNature, The Global Stocktake at COP28, published 13 October 2023, accessed 1 December 2023 GtC - Gigatonnes of carbon GWP - Global warming potential GWP* - a measure of the change in global warming potential (GWP) over a period of time compared to the global warming potential at a selected base year.Bowman, M. and Hurley, N., Policy Brief: GWP* – An Inappropriate and Dangerous Measure of Livestock Methane’s Contribution to Global Warming, page 3, published in November 2024, archived on 11 July 2025, accessed on 21 August 2026

H HadCM3 - Hadley Centre Coupled Model, version 3 HadGEM - Hadley Centre Global Environmental Model HadGEM1 - HCFC - Hydrochlorofluorocarbon HFC - Hydrofluorocarbon

I ICLEI - International Council for Local Environmental Initiatives IKI - International Climate Initiative (),Bundesumweltministerium, Internationales Förderprogramm für NGOs: IKI Medium Grants startet vierten Ideenwettbewerb für Projekte in Entwicklungsländern, published 6 April 2023, accessed 10 August 2023 a German Federal Government initiative United Nations, International Climate Initiative, published 10 March 2021, accessed 10 August 2023 IPCC - Intergovernmental Panel on Climate Change IPCC-50 - the IPCC's 50th session (2019) IPCC-NGGIP - IPCC National Greenhouse Gas Inventories Programme ISO 1406x Series - ISO standards for climate change mitigation ISO 14090:2019 - ISO standard for adaptation to climate change — Principles, requirements and guidelines ISO/DIS 14091 - Adaptation to climate change — Guidelines on vulnerability, impacts and risk assessment ISO/TS 14092 - Adaptation to climate change — Requirements and guidance on adaptation planning for local governments and communities

J JI - Joint Implementation

K