IB Geography Topic 2.1.4 Synthesis and Evaluation Revision Notes (SL/HL)

IB Geography Topic 2.1.4 Synthesis and Evaluation Revision Notes (SL/HL) | RevisionDojo

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Complexity of Climate Systems

Imagine trying to predict the path of a leaf in a swirling wind.
The leaf's movement depends on countless factors: wind speed, direction, obstacles, and even the leaf's shape.

Note

Climate systems are similarly complex, influenced by interconnected processes and feedback loops.

Feedback Loops: Amplifying or Dampening Change

Feedback loops are processes that either enhance or reduce changes in a system.

Positive Feedback Loops

Amplify changes, pushing the system further from its original state.
Example: Melting Ice and Albedo
1. Ice reflects sunlight due to its high albedo (reflectivity).
  1. When ice melts, darker ocean water is exposed, absorbing more heat.
  2. This causes more ice to melt, further reducing albedo and increasing warming.

Example

Arctic sea ice is melting at an alarming rate, reducing the Earth's ability to reflect solar radiation and accelerating global warming.

Negative Feedback Loops

Counteract changes, stabilizing the system.
Example: Increased Plant Growth
1. Higher $CO_2$ levels can stimulate plant growth.
  1. Plants absorb $CO_2$ during photosynthesis, reducing atmospheric $CO_2$.
  2. This process helps moderate warming by removing some greenhouse gases.

Example

Tropical rainforests act as carbon sinks, absorbing about 25% of human-generated $CO_2$ emissions.

Interdependencies in Climate Systems

Climate systems are interdependent, meaning changes in one component affect others.

Ocean-Atmosphere Interactions
1. Oceans store and redistribute heat through currents like the Gulf Stream.
2. Changes in ocean temperatures can alter weather patterns, such as monsoons or hurricanes.
Biosphere-Atmosphere Links

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IB Geography 2.1.4 Synthesis and Evaluation Notes

Complexity of Climate Systems

Feedback Loops: Amplifying or Dampening Change

Positive Feedback Loops

Negative Feedback Loops

Interdependencies in Climate Systems

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Complexity of Climate Systems

Feedback Loops: Amplifying or Dampening Change

Positive Feedback Loops

Negative Feedback Loops

Interdependencies in Climate Systems

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1 Changing Population3 subtopics

2 Global Climate - Vulnerability and Resilience3 subtopics

3 Global Resource Consumption and Security3 subtopics

4 Power, Places and Networks (HL only)3 subtopics

5 Human Development and Diversity (HL only)3 subtopics

6 Global Risks and Resilience (HL only)3 subtopics

Option A Freshwater - Drainage Basins4 subtopics

Option B Oceans and Coastal Margins4 subtopics

Option C Extreme Environments4 subtopics

Option D Geophysical Hazards4 subtopics

Option E Leisure, Tourism and Sport4 subtopics

Option F The Geography of Food and Health4 subtopics

Option G Urban Environments5 subtopics

IB Geography 2.1.4 Synthesis and Evaluation Notes

1 Changing Population3 subtopics

2 Global Climate - Vulnerability and Resilience3 subtopics

3 Global Resource Consumption and Security3 subtopics

4 Power, Places and Networks (HL only)3 subtopics

5 Human Development and Diversity (HL only)3 subtopics

6 Global Risks and Resilience (HL only)3 subtopics

Option A Freshwater - Drainage Basins4 subtopics

Option B Oceans and Coastal Margins4 subtopics

Option C Extreme Environments4 subtopics

Option D Geophysical Hazards4 subtopics

Option E Leisure, Tourism and Sport4 subtopics

Option F The Geography of Food and Health4 subtopics

Option G Urban Environments5 subtopics

Complexity of Climate Systems

Feedback Loops: Amplifying or Dampening Change

Positive Feedback Loops

Negative Feedback Loops

Interdependencies in Climate Systems

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

Complexity of Climate Systems

Feedback Loops: Amplifying or Dampening Change

Positive Feedback Loops

Negative Feedback Loops

Interdependencies in Climate Systems

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account