List of abbreviations relating to climate change

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

• 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 ^[1]
• 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 ^[2]
• 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

• BAP - Bali Action Plan

• 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 ^[3]
• CAPP - Climate Action Pacific Partnership ^[4]
  • 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 ^[5]
• 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 Salaam^[6]
• CCF - The Scottish Government's Climate Challenge Fund
• CCIA - Climate Change in Australia
• CC:iNet - Climate Change Information Network ^[7]
• CCL - Climate Change Levy (UK)
• CCl₂F₂ - Dichlorodifluoromethane (greenhouse gas)
• CCLS - Cambridge Climate Lecture Series
• CCRA - Climate Change Risk Assessment ^{[lower-alpha 1]}
• CCS - Carbon Capture and Storage
• CCSO - Climate Change Support Office, within the United States' Department of State.^[9]
• 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 ^[10]
• 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 ^[11]
• 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 ^[12]
• CO₂ - Carbon dioxide
• CO₂-e - Carbon dioxide equivalent, also CO₂-eq ^[13]
• CoM - Covenant of Mayors for Climate and Energy (Europe) ^[14]
• 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) ^[15]
  • 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) ^[16]
  • 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 ^[17]
  • 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),^[18] to take place in Belém, Brazil.^[19]
  • COP31 - anticipated 2026 UNFCCC Conference of the Parties
  • COP32 - anticipated 2027 UNFCCC Conference of the Parties, to be held in an African host city.
  • COP33 - anticipated 2028 UNFCCC Conference of the Parties. Indian Prime Minister Narendra Modi has proposed hosting COP33 in India.^[20]
• 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 ^[21]
• CRU - Climatic Research Unit at the University of East Anglia
• CRU TS - Climatic Research Unit Time Series datasets ^[22]
• 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

• DECC - Department of Energy and Climate Change (UK), now Department for Business, Energy and Industrial Strategy

• ECI - Environmental Change Institute at the University of Oxford
• EPR - Extended Producer Responsibility
• ETC - Energy Transition Council ^[18]
• ETS - Emissions Trading System
• ETSWAP - Emissions Trading Scheme Workflow Automation Project operated by the UK's Environment Agency

• 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

• GCF - Green Climate Fund
• GCoM - Global Covenant of Mayors for Climate and Energy^[14]
• GHG - Greenhouse gas
• GST - Global Stocktake^[23]
• GtC - Gigatonnes of carbon
• GWP - Global warming potential

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

• ICLEI - International Council for Local Environmental Initiatives
• IKI - International Climate Initiative (German: Internationalen Klimaschutzinitiative),^[24] a German Federal Government initiative ^[25]
• 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

• JI - Joint Implementation

• KLD - Ministry of Climate and Environment (Klima- og miljødepartementet), Norway ^[26]

• LCDI - Low Carbon Development Indonesia ^[27]
• LDCF - Least Developed Countries Fund ^[28]
• LECBP - Low Emission Capacity Building Programme ^[29]
• LEDS - Low-Emission Development Strategies
• LSCE - Laboratoire des sciences du climat et de l'environnement, Gif-sur-Yvette, France
• LULUCF - Land use, land-use change, and forestry

• MCC - Mercator Research Institute on Global Commons and Climate Change, Berlin
• MPGCA - Marrakech Partnership for Global Climate Action
• MoCC - Ministry of Climate Change (Pakistan)
• MoEFCC - Ministry of Environment, Forest and Climate Change (India)
• MOP1 - 1st Meeting of the Parties to the Kyoto Protocol (28 November - 9 December 2005)
• MOP2 - 2nd Meeting of the Parties to the Kyoto Protocol (6-17 November 2006)
• MOP3 - 3rd Meeting of the Parties to the Kyoto Protocol (3-15 December 2007)
• MOP4 - 4th Meeting of the Parties to the Kyoto Protocol (1-12 December 2008)
• MOP5 - 5th Meeting of the Parties to the Kyoto Protocol (7-18 December 2009)
• MRF - Materials Recovery Facility
• MWE/CCD - Climate Change Department of the Ministry of Water and Environment (Uganda)

• NAMA - Nationally Appropriate Mitigation Actions
• NAPA - National Adaptation Programme of Action
• NAZCA - Non-state Actor Zone for Climate Action
• NC - National Communication (under the Paris Agreement) ^[30]
• NCQG - New Collective Quantified Goal: see 2024 United Nations Climate Change Conference
• NDC - Nationally Determined Contributions
• NECIA - Northeast Climate Impacts Assessment (USA) ^[31]
• N₂O - Nitrous Oxide
• NRSP - National Reports Submission Portal ^[30]

• O₃ - Ozone

• PATPA - Partnership on Transparency in the Paris Agreement
• P-CAN - Place-based Climate Action Networks, a UK-based partnership between university researchers and the public, private and third sectors in tackling climate change, aiming to accelerate and sustain the transition to a low-carbon, climate-resilient society through the creation of local climate commissions.^[32]
• PCD - Petersberg Climate Dialogue
  • PCD X - Petersberg Climate Dialogue 10 (13-14 May 2019) ^[33]
  • PCD XI - Petersberg Climate Dialogue (27-28 April 2020)
• PFC - Perfluorocarbon
• PIK - Potsdam Institute for Climate Impact Research (German: Potsdam-Institut für Klimafolgenforschung)

• SAR - Second Assessment Report of the IPCC (1995)
• SB 52 - Fifty-second session of the Subsidiary Body for Scientific and Technological Advice (SBSTA 52) and the fifty-second session of the Subsidiary Body for Implementation (SBI 52) (postponed to 2021) ^[34]
• SB 56 - the Bonn Climate Change Conference, 56th session of the subsidiary bodies, held on 6 to 16 June 2022 ^[35]
• SBI - Subsidiary Body for Implementation
  • SBI 46 - Forth-sixth session of the Subsidiary Body for Implementation (8-18 May 2017)
  • SBI 47 - Forty-seventh session of the Subsidiary Body for Implementation (6-15 November 2017)
  • SBI 52 - Fifty-second session of the Subsidiary Body for Implementation (postponed to 2021) ^[34]
• SBSTA - Subsidiary Body for Scientific and Technological Advice
• SBTi - Science Based Targets initiative ^{[lower-alpha 2]}
• SCCF - Special Climate Change Fund ^[28]
• SDA - Sectoral Decarbonization Approach
• SDGs - Sustainable Development Goals
• SECR - Streamlined Energy and Carbon Reporting framework (UK)
• SF₆ - Sulfur hexafluoride
• SRCCL - Special Report on Climate Change and Land of the IPCC
• SRES - Special Report on Emissions Scenarios of the IPCC
• SR15 - IPCC's Special Report on Global Warming of 1.5 °C
• SSP - Shared Socioeconomic Pathway

• TACC - Territorial Approach to Climate Change
• TAR - Third Assessment Report of the IPCC (2001)
• TCCC - Tarawa Climate Change Conference
• TCFD - Task Force on Climate-related Financial Disclosures^[37]
• tCO2 - Tonnes of carbon dioxide equivalent
• TD - Talanoa Dialogue
• TFI - Task Force on National Greenhouse Gas Inventories ^[38]

• UKCIP - Multi-disciplinary team formerly known as the UK Climate Impacts Programme, based at the Environmental Change Institute at the University of Oxford
• UKCP - UK Climate Projections^[39]
  • UKCP09 - UK Climate Projections 2009
  • UKCP18 - UK Climate Projections 2018 ^[40]
• UKHACC - UK Health Alliance on Climate Change
• UN CC:Learn - One UN Climate Change Learning Partnership
• UNEP - United Nations Environment Programme
• UNFCCC - United Nations Framework Convention on Climate Change
• USCAP - U.S. Climate Action Partnership

• WCAS - World Climate Action Summit, held on 1–2 December 2023, during the COP28 United Nations Climate Change Conference.^[41]
• WCI - Western Climate Initiative
• WCRP - World Climate Research Programme
• WGI - Working Group I of the IPCC, which assesses the physical science of climate change
• WGII - Working Group II of the IPCC, which assesses the vulnerability of socio-economic and natural systems to climate change
• WGIII - Working Group III of the IPCC, which "focuses on climate change mitigation, assessing methods for reducing greenhouse gas emissions, and removing greenhouse gases from the atmosphere".
• WIM - Warsaw International Mechanism for Loss and Damage associated with Climate Change Impacts^[42]
• WMO - World Meteorological Organization
• WRI - World Resources Institute

• 4CMR - Former Cambridge Centre for Climate Change Mitigation Research

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