Skip to main content

Glossary

Glossary

Climate change is a complex topic that spans multiple scientific, economic, and social fields. Understanding its mechanisms and impacts requires acquiring a precise and rigorous vocabulary. This glossary aims to provide clear and accessible definitions of key climate-related terms, based on the latest scientific knowledge.

A

Adaptation

The process of adjustment to actual or expected climate and its effects. In human systems, adaptation seeks to moderate or avoid harm or exploit beneficial opportunities. In some natural systems, human intervention may facilitate adjustment to expected climate and its effects. (Definition according the World Bank Glossary)

Adaptation Capacity

The ability of systems, institutions, humans and other organisms to adjust to potential damage, to take advantage of opportunities, or to respond to consequences. (Definition according the World Bank Glossary)

Adaptation one

The process of adjustment to actual or expected climate and its effects. In human systems, adaptation seeks to moderate or avoid harm or exploit beneficial opportunities. (Definition according to the World Bank Glossary)

Afforestation

Planting of new forests on lands that historically have not contained forests. See: IPCC Special Report on Land Use, Land-Use Change, and Forestry; Definitions and Methodological Options to Inventory Emissions from Direct Human-induced Degradation of Forests and Devegetation of Other Vegetation Types. (Definition according the World Bank Glossary)

Afforestation one

The establishment of a forest or stand of trees in an area where there was no previous tree cover. (Definition according to the World Bank Glossary)

Agriculture, Forestry and Other Land Use (AFOLU)

Emissions and removals of greenhouse gases (resulting from direct human-induced land use, land-use change, and forestry activities, which may include or exclude agricultural emissions. AFOLU plays a central role for food security and sustainable development. The main mitigation options within AFOLU involve one or more of three strategies: 1) prevention—of emissions to the atmosphere by conserving existing carbon pools in soils or vegetation or by reducing emissions of methane and nitrous oxide; 2) sequestration—increasing the size of existing carbon pools and thereby extracting carbon dioxide (CO2) from the atmosphere; and 3) substitution—substituting biological products for fossil fuels or energy-intensive products, thereby reducing CO2 emissions. Demand-side measures (e.g., reducing losses and wastes of food, changes in human diet, or changes in wood consumption) may also play a role. (Definition according the World Bank Glossary)

Anthropocene

The current geologic age, used to describe the most recent period in Earth’s history when human activity started to have significant impact on the planet’s climate and ecosystems. (Definition according the World Bank Glossary)

Anthropocene one

A proposed geological epoch dating from the commencement of significant human impact on Earth's geology and ecosystems. (Definition according to the World Bank Glossary)
B

Baseline

Baseline scenarios can be compared to mitigation scenarios that are constructed to meet different goals for greenhouse gas (GHG) emissions, atmospheric concentrations or temperature changes. The term baseline scenario is used interchangeably with 

Baseline one

A reference point against which change can be measured. In climate change, this often refers to historical emissions or climate conditions used as a starting point for measuring progress. (Definition according to the World Bank Glossary)

Biennial Updated Reports (BUR)

BURs are reports to be submitted by non-Annex I Parties, containing updates of national Greenhouse Gas (GHG) inventories, including a national inventory report and information on mitigation actions, needs and support received. Such reports provide updates on actions undertaken by a Party to implement the Convention, including the status of its GHG emissions and removals by sinks, as well as on the actions to reduce emissions or enhance sinks.

Business-as-usual (BAU)

Is used interchangeably with reference scenario and no policy scenario. In much of the literature the term is also synonymous with the term 'Baseline' scenario.

C

Climate Bonds Taxonomy

The Climate Bonds Taxonomy identifies the assets, activities and projects needed to deliver a low carbon economy. Consistent with the  goals of the Paris Agreement. It has been developed based on the  latest climate science including research from the  Intergovernmental Panel on Climate Change (IPCC)  and the International Energy Agency (IEA), and has  benefited from the input of hundreds of technical  experts from around the world. It can be used by any  entity looking to identify which assets and activities,  and associated financial instruments, are compatible  with a trajectory to net zero by 2050.

Climate Bonds Taxonomy one

A classification system that defines which economic activities and assets can be labeled as green for the purposes of climate bond issuance. (Definition according to the World Bank Glossary)

COP28 – UN Climate Change Conference

Carbon credits or emission reductions achieved by CDM projects and verified by a DOE (Designated Operational Entity) under the rules of the Kyoto Protocol.

O

One Planet Summit for the Ocean

As defined in Article 12 of the Protocol, allows a country with an emission-reduction or emission-limitation commitment under the Kyoto Protocol (Annex B Party) to implement an emission-reduction project in developing countries UNFCCC Definition).