Emergence (Q535)
Subject, term, tag: Emergence
- Emergence (of the climate signal)
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Emergence |
Subject, term, tag: Emergence |
|
Statements
IPCC Glossary v1.5
1 reference
27 May 2026
Emergence of a climate change signal or trend refers to when a change in climate (the ‘signal’) becomes larger than the amplitude of natural or internal variations (defining the ‘noise’), This concept is often expressed as a ‘signal-to-noise’ ratio and emergence occurs at a defined threshold of this ratio (e.g., S/N > 1 or 2). Emergence can refer to changes relative to a historical or modern baseline (usually at least 20 years long) and can also be expressed in terms of time (time of emergence) or in terms of a global warming level. Emergence is also used to refer to a time when we can expect to see a response to reducing greenhouse gas (GHG) emissions (emergence with respect to mitigation). Emergence can be estimated using observations and/or model simulations. (English)
IPCC Glossary v1.5
1 reference
27 May 2026