Positive Feedback Loop

A positive feedback loop is a process in which an initial change in a system triggers a response that amplifies or enhances that change, leading to an exponential increase in the effect. This loop continues until an external factor intervenes to stop the amplification.

Examples:

  • Climate Change: As global temperatures rise, polar ice melts, reducing the Earth’s albedo (reflectivity). This leads to more solar absorption, which further increases temperatures and causes more ice to melt.
  • Childbirth: During labor, the reLease of oxytocin increases contractions, which in turn stimulates more oxytocin reLease, intensifying the contractions until delivery occurs.
  • Economic Growth: Increased consumer spending leads to higher business Revenues, which can result in more hiring and investment, further boosting consumer spending.

Cases:

  • Financial Markets: Positive feedback can occur in Stock markets where rising Stock prices encourage more buying, further driving up prices.
  • Population Dynamics: In certain species, an increase in population can lead to more births, resulting in an even larger population increase over time.