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negative feedback
decreases the amount of change by reducing some of the inputs, returning the system to stability.
Positive feedback
less common. It increases the amount of change. This leads to an imbalance
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)
High albedo means positive or negative
negative
Low albedo means positive or negative
positive
low albedo surfaces example
ocean forest
high albedo surfaces examples
ice clouds desert
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.
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
Solar radiation variations, including global dimming due to volcanic eruptions
tbf