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The Intergovernmental Panel on Climate Change (IPCC) with the United Nations Framework Convention on Climate Change (UNFCCC) use tens of acronyms and initialisms in documents relating to climate change policy.

A

• AAU - Assigned amount unit
• AGGI - Annual Greenhouse Gas Index
• AMO - Atlantic multidecadal oscillation
• AO - Arctic oscillation

C

• CDM – Clean Development Mechanism is an arrangement under the Kyoto Protocol allowing industrialised countries with a greenhouse gas reduction commitment (called Annex 1 countries) to invest in projects that reduce emissions in developing countries as an alternative to more expensive emission reductions in their own countries.
• CDR - Carbon dioxide removal
• CER – Certified Emission Reduction
• CFC - Chlorofluorocarbon
• CF₄ - Carbon tetrafluoride
• CH₄ - Methane
• COP - Conference of the Parties
• CO₂ - Carbon dioxide
• C₂F₆ - Hexafluoroethane

D

• DER – Distributed Energy Resources is a small-scale unit of power generation that operates locally and is connected to a larger power grid at the distribution level. DERs include solar panels, small natural gas-fueled generators, electric vehicles and controllable loads, such as HVAC systems and electric water heaters. An important distinction of a DER is that the energy it produces is often consumed close to the source.

E

• EEI - Earth's Energy Imbalance
• ENSO - El Niño–Southern Oscillation

G

• GCM - General circulation model or global climate model
• GFDL - Geophysical Fluid Dynamics Laboratory
• GHG - Greenhouse gas
• GWP - Global warming potential

H

• HCFC - Hydrochlorofluorocarbon
• HFC - Hydrofluorocarbon
• H₂O - Water vapor

I

• IOD - Indian Ocean Dipole
• IPO - Interdecadal Pacific oscillation
• IPCC - Intergovernmental Panel on Climate Change

M

• MSL - Mean Sea Level

N

• NCDS - Nationally Determined Contributions (aka Paris Accord/Agreement)
• NAPA – National Adaptation Programme of Action.
• NCAR - National Center for Atmospheric Research
• NF₃ - Nitrogen trifluoride
• N₂0 - Nitrous oxide

O

• OHC - Ocean heat content
• O₃ - (Tropospheric) Ozone

P

• PDO - Pacific decadal oscillation

R

• RCP - Representative Concentration Pathway
• REDD – Reducing emissions from deforestation and forest degradation mechanisms use market/financial incentives to reduce the emission of greenhouse gases from deforestation and forest degradation.

S

• SSP - Shared Socioeconomic Pathways
• SST - Sea surface temperature
• SF₆ - Sulfur hexafluoride

T

• TEWI - Total equivalent warming impact

U

• UHI - Urban heat island

W

• WMO - World Meteorological Organization

See also

• Glossary of climate change

References

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