Amazon Deforestation as an Example of Positive Feedback
In the Amazon rainforest, deforestation exemplifies a positive feedback loop. The initial clearing of forests for agriculture reduces local rainfall, which creates drier conditions and increases the forest's susceptibility to fires. These fires cause further deforestation, perpetuating a self-reinforcing 'vicious cycle' of forest loss and conversion to dry grassland. Beyond a certain tipping point, this process can become self-sustaining, continuing even if the initial agricultural expansion stops.
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Introduction to Macroeconomics Course
Ch.8 Economic dynamics: Financial and environmental crises - The Economy 2.0 Macroeconomics @ CORE Econ
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Amazon Deforestation as an Example of Positive Feedback
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Amazon Deforestation as an Example of Positive Feedback
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Air Conditioning Use as a Climate Change Feedback Loop
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Figure 8.26: Climate Change Feedback Mechanisms
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Learn After
A large area of tropical rainforest is cleared for agricultural use. Scientists observe that over the following years, rainfall in the adjacent, uncleared forest area decreases. This leads to drier vegetation, which increases the frequency and intensity of forest fires, resulting in more of the forest being lost. Which of the following statements best analyzes this situation as a self-reinforcing cycle?
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In a region experiencing a self-reinforcing cycle of forest loss due to reduced rainfall and increased fires, completely halting the initial agricultural clearing that started the process is always sufficient to stop further forest decline.
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A large-scale agricultural project clears a significant portion of a tropical rainforest. Over time, scientists observe that even in areas far from the initial clearing, the forest is becoming drier and more prone to fires, leading to further, unplanned forest loss. Based on the principles of a self-reinforcing environmental cycle, what is the most likely long-term outcome for this ecosystem if no major interventions are made?