In Earth science, the term "set point" refers to a stable equilibrium or balance in a natural system, such as the climate or an ecosystem. The set point represents the ideal or optimal conditions for the system, and the system tends to return to this set point despite temporary disturbances or fluctuations.
One example of set point in Earth science is the concept of temperature set point in the climate system. Earth's climate tends to maintain a relatively stable average temperature over long periods of time, despite short-term fluctuations. This average temperature represents the set point for the climate system.