In an environmental system at a stable, high-resource equilibrium, a single, temporary negative shock (e.g., an unusually warm year reducing ice) will cause the system to settle into a new, permanently lower equilibrium state.
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Figure 8.29: Stabilization of Sea Ice After a Shock
Comparison of Modeled Rebound and Pre-1970s Ice Stability
Effect of Large Shocks on a Stable Equilibrium
Consider a climate system that is settled in a stable, high-ice equilibrium. A single, unusually warm year causes a temporary reduction in the total sea ice extent, after which environmental conditions return to their normal long-term average. Based on the principles governing a stable environmental equilibrium, what is the most likely trajectory for the sea ice extent in the subsequent years?
Analyzing Sea Ice Recovery Data
Mechanism of Equilibrium Recovery
An environmental system is in a stable, high-ice equilibrium. A temporary, external event causes a one-time reduction in the ice extent. Arrange the following events to describe the system's self-correction process back towards its original state.
Evaluating Claims About Environmental Stability
In an environmental system at a stable, high-resource equilibrium, a single, temporary negative shock (e.g., an unusually warm year reducing ice) will cause the system to settle into a new, permanently lower equilibrium state.
Interpreting a Climate Model's Response to a Shock
Match each term related to an environmental system's response to a temporary disturbance with its correct description.
In a graphical model of a stable environmental equilibrium, when a temporary shock reduces the resource level below the equilibrium point, the system self-corrects. For this to occur, the curve representing the system's dynamics must lie ____ the 45-degree line in the region between the new, lower resource level and the original equilibrium point.
In a model of an environmental system, the amount of a resource (like sea ice) in one year determines the amount in the next year. The system is currently in a stable, high-resource equilibrium. Following a temporary shock that reduces the resource level, the system begins to self-correct and return to its original state. Which of the following statements best explains the underlying mechanism for this recovery?