parameterization
/pəˌræmɪtəraɪˈzeɪʃən/
Definition
The mathematical method of representing small-scale, complex physical processes (such as cloud formation or turbulence) within a climate model using simplified, estimated variables because these processes occur at a scale too small for the model's grid to simulate directly.
Etymology
Derived from 'parameter' (from Greek 'para-' meaning beside and 'metron' meaning measure) combined with the suffix '-ization' denoting the process of making something into a parameter. It emerged in technical and scientific fields during the 20th century to describe the act of defining a system through specific variable values.
In the news
In the article, parameterizations are mentioned as a key structural choice made by model developers. These simplifications help scientists represent complex atmospheric interactions that cannot be resolved explicitly by a climate model's grid.
How Attribution Science Uses Models to Uncover Climate Change’s Effects on Weather
Read the full article ↗The Equation - Union of Concerned Scientists