Feedback Loops

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10 Terms

1
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negative feedback

decreases the amount of change by reducing some of the inputs, returning the system to stability.

2
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Positive feedback

less common. It increases the amount of change. This leads to an imbalance

3
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deforestation impact on albedo

Loss of dense forest would lead to an increase in albedo as darker forest is converted to lighter pasture and arable land.(negative) Urbanization with its concrete structures would decrease albedo as they absorb solar energy. (positive)

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High albedo means positive or negative

negative

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Low albedo means positive or negative

positive

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low albedo surfaces example

ocean forest

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high albedo surfaces examples

ice clouds desert

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ice-albedo feedback loop

Global temperatures rise, causing snow and ice to melt.

As ice melts, darker surfaces (like ocean water or land) are exposed.

These darker surfaces have a lower albedo, absorbing more solar radiation.

Increased absorption leads to further warming, which in turn causes more ice to melt, reinforcing the initial warming.

positive feedback loop.

9
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Methane gas release and feedback loops

Rotting vegetation trapped under permafrost in the tundra releases methane that is unable to escape because of the ice covering

Increased thawing of permafrost will lead to an increase in methane levels as the gas escapes, adding to global warming gases in the atmosphere and thereby increasing mean global temperature

10
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Solar radiation variations, including global dimming due to volcanic eruptions

tbf