List of abbreviations relating to climate change

A

• ADP - Ad Hoc Working Group on the Durban Platform for Enhanced Action
• AGN -
• APA - Ad Hoc Working Group on the Paris Agreement
• APP - Asia-Pacific Partnership on Clean Development and Climate
• AR4 - Fourth Assessment Report of the IPCC
• AR5 - Fifth Assessment Report of the IPCC
• AR5 SYR - Synthesis Report of AR5
• AR6 - Sixth Assessment Report of the IPCC
• 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
• CAPP - Climate Action Pacific Partnership
• *CAPP II - Climate Action Pacific Partnership Conference II – 2018
• *CAPP III - Third meeting of the Climate Action Pacific Partnership Conference
• CCA - Climate Change Agreement
• CCAFS - Climate Change, Agriculture and Food Security Research Program
• CCAF - Climate Change Action Fund
• CCC - Committee on Climate Change
• 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
• CCF - The Scottish Government's
• CCIA -
• CC:iNet - Climate Change Information Network
• CCL - Climate Change Levy
• CCl₂F₂ - Dichlorodifluoromethane
• CCLS -
• CCRA - Climate Change Risk Assessment
• CCS - Carbon Capture and Storage
• CCSO - Climate Change Support Office, within the United States' Department of State.
• 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 -
• CF₄ - Carbon tetrafluoride or tetrafluoromethane
• CGE - Consultative Group of Experts
• CHClF₂ - Chlorodifluoromethane
• 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
• **CMA1.2 - The second part of the first session of the Conference of the meeting of the Parties to the Paris Agreement
• **CMA1.3 - The third part of the first session of the Conference of the meeting of the Parties to the Paris Agreement
• *CMA2 - Second meeting of the Parties to the Paris Agreement
• *CMA3 - Third meeting of the Parties to the Paris Agreement
• CMIP - Coupled Model Intercomparison Project
• *CMIP5 - Coupled Model Intercomparison Project, Phase 5
• 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
• *CMP10 - 10th meeting of the Parties to the Kyoto Protocol
• *CMP11 - 11th meeting of the Parties to the Kyoto Protocol
• *CMP12 - 12th meeting of the Parties to the Kyoto Protocol
• *CMP13 - 13th meeting of the Parties to the Kyoto Protocol
• *CMP14 - 14th meeting of the Parties to the Kyoto Protocol
• *CMP15 - 15th meeting of the Parties to the Kyoto Protocol
• *CMP16 - 16th meeting of the Parties to the Kyoto Protocol
• CNZ - Carbon Net Zero
• CO₂ - Carbon dioxide
• CO₂-e - Carbon dioxide equivalent, also CO₂-eq
• CoM - Covenant of Mayors for Climate and Energy
• COP - Conference of the Parties
• *COP1 - First UNFCCC Conference of the Parties
• *COP2 - Second UNFCCC Conference of the Parties
• *COP3 - Third UNFCCC Conference of the Parties
• *COP4 - Fourth UNFCCC Conference of the Parties
• *COP5 - Fifth UNFCCC Conference of the Parties
• *COP6 - Sixth UNFCCC Conference of the Parties
• *COP6-bis - Resumed Session of COP6
• *COP7 - Seventh UNFCCC Conference of the Parties
• *COP8 - Eighth UNFCCC Conference of the Parties
• *COP9 - Ninth UNFCCC Conference of the Parties
• *COP10 - Tenth UNFCCC Conference of the Parties
• *COP11 - Eleventh UNFCCC Conference of the Parties
• *COP12 - Twelfth UNFCCC Conference of the Parties
• *COP13 - 13th UNFCCC Conference of the Parties
• *COP14 - 14th UNFCCC Conference of the Parties
• *COP15 - 15th UNFCCC Conference of the Parties
• *COP16 - 16th UNFCCC Conference of the Parties
• *COP17 - 17th UNFCCC Conference of the Parties
• *COP18 - 18th UNFCCC Conference of the Parties
• *COP19 - 19th UNFCCC Conference of the Parties
• *COP20 - 20th UNFCCC Conference of the Parties
• *COP21 - 21st UNFCCC Conference of the Parties
• *COP22 - 22nd UNFCCC Conference of the Parties
• *COP23 - 23rd UNFCCC Conference of the Parties
• *COP24 - 24th UNFCCC Conference of the Parties
• *COP25 - 25th UNFCCC Conference of the Parties
• *COP26 - 26th UNFCCC Conference of the Parties
• *COP27 - 27th UNFCCC Conference of the Parties
• *COP28 - 28th UNFCCC Conference of the Parties, held in the United Arab Emirates
• *COP29 - 29th UNFCCC Conference of the Parties, held in Baku
• *COP30 - 2025 UNFCCC Conference of the Parties, to take place in Belém, Brazil.
• *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.
• CORSIA - Carbon Offsetting and Reduction Scheme for International Aviation
• CPA - Carbon Pricing Act
• CPRS - Carbon Pollution Reduction Scheme
• CRC - CRC Energy Efficiency Scheme, formerly Carbon Reduction Commitment
• CREWS - Climate Risk and Early Warning Systems
• CRU - Climatic Research Unit at the University of East Anglia
• CRU TS - Climatic Research Unit Time Series datasets
• CSA -
• CVF - Climate Vulnerable Forum
• C40 - group of cities focused on fighting the climate crisis: see C40 Cities Climate Leadership Group

D

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

E

• ECI - Environmental Change Institute at the University of Oxford
• EPR -
• 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
• F-gas - Fluorinated gas
• FICER -
• 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 Stocktake
• GtC - Gigatonnes of carbon
• GWP - Global warming potential

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, a German Federal Government initiative
• IPCC - Intergovernmental Panel on Climate Change
• *IPCC-50 - the IPCC's 50th session
• - IPCC National Greenhouse Gas Inventories Programme
• - ISO standards for climate change mitigation
• - ISO standard for adaptation to climate change — Principles, requirements and guidelines
• - Adaptation to climate change — Guidelines on vulnerability, impacts and risk assessment
• - Adaptation to climate change — Requirements and guidance on adaptation planning for local governments and communities

J

• JI - Joint Implementation

K

• KLD - Ministry of Climate and Environment, Norway

L

• LCDI - Low Carbon Development Indonesia
• LDCF - Least Developed Countries Fund
• LECBP - Low Emission Capacity Building Programme
• 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

M

• MCC - Mercator Research Institute on Global Commons and Climate Change, Berlin
• MPGCA - Marrakech Partnership for Global Climate Action
• MoCC - Ministry of Climate Change
• MoEFCC - Ministry of Environment, Forest and Climate Change
• MOP1 - 1st Meeting of the Parties to the Kyoto Protocol
• MOP2 - 2nd Meeting of the Parties to the Kyoto Protocol
• MOP3 - 3rd Meeting of the Parties to the Kyoto Protocol
• MOP4 - 4th Meeting of the Parties to the Kyoto Protocol
• MOP5 - 5th Meeting of the Parties to the Kyoto Protocol
• MRF - Materials Recovery Facility
• MWE/CCD - of the Ministry of Water and Environment

N

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

O

• O₃ - Ozone

P

• PATPA -
• 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.
• PCD - Petersberg Climate Dialogue
• *PCD X - Petersberg Climate Dialogue 10
• *PCD XI - Petersberg Climate Dialogue
• PFC - Perfluorocarbon
• PIK - Potsdam Institute for Climate Impact Research

S

• SAR - Second Assessment Report of the IPCC
• SB 52 - Fifty-second session of the Subsidiary Body for Scientific and Technological Advice and the fifty-second session of the Subsidiary Body for Implementation
• SB 56 - the Bonn Climate Change Conference, 56th session of the subsidiary bodies, held on 6 to 16 June 2022
• SBI - Subsidiary Body for Implementation
• *SBI 46 - Forth-sixth session of the Subsidiary Body for Implementation
• *SBI 47 - Forty-seventh session of the Subsidiary Body for Implementation
• *SBI 52 - Fifty-second session of the Subsidiary Body for Implementation
• SBSTA - Subsidiary Body for Scientific and Technological Advice
• SBTi -
• SCCF - Special Climate Change Fund
• SDA -
• SDGs - Sustainable Development Goals
• SECR - Streamlined Energy and Carbon Reporting framework
• 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

T

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

U

• 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
• *UKCP09 - UK Climate Projections 2009
• *UKCP18 - UK Climate Projections 2018
• UKHACC -
• UN CC:Learn -
• UNEP - United Nations Environment Programme
• UNFCCC - United Nations Framework Convention on Climate Change
• USCAP - U.S. Climate Action Partnership

W

• WCAS - World Climate Action Summit, held on 1–2 December 2023, during the COP28 United Nations Climate Change Conference.
• WCI - Western Climate Initiative
• WCRP - World Climate Research Programme
• WGI -, which assesses the physical science of climate change
• WGII -, which assesses the vulnerability of socio-economic and natural systems to climate change
• WGIII -, 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
• WMO - World Meteorological Organization
• WRI - World Resources Institute

Numerical

• 4CMR - Former