ESS Mini Summative

feedbacks topic 1

Negative Feedback

feedback loop that counteracts any deviation from an equilibrium

Positive Feedback

feedback loop that amplifies change away from an equilibrium

Example of negative feedback 1

More CO2 in atmosphere leads to increased temperatures, leading to more evaporation of water, leading to water forming into clouds, leading to more cloud cover, leading to an increase in albedo, leading to more light being reflected, leading to reduced temperatures

Example of negative feedback 2

An increase in predator population leads to an increase consumption of prey species, leading to reduced numbers of prey leading to smaller number of prey, leading to predator numbers decreasing, leading to prey numbers recovering

Example of positive feedback 1

global warming leads to a shrinking of ice sheets, leading to a decrease in albedo, leading to an incense in IR absorption, leading to an increase in global temperatures

Example of positive feedback 2

An increase in human population, leads to more births, leading to an increase in size of population