In simple terms
A friendly intro before the formal notes — no formulas yet.
Weathering the Climate Storm
Not everyone experiences a storm in the same way. This topic explains why some communities are hit harder by climate change and have fewer resources to recover, a concept called vulnerability.
Imagine two people get the same flu virus. One is a fit, healthy adult who feels ill for a few days but recovers quickly. The other is an elderly person with a pre-existing lung condition who becomes seriously ill and needs hospitalisation. The virus is the climate hazard (like a flood or drought). The first person is resilient, while the second is vulnerable due to their sensitivity and lower capacity to cope.
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First, identify a specific climate change hazard, such as more intense tropical cyclones or rising sea levels.
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Next, assess the exposure and sensitivity of a population. For example, a densely populated, low-lying coastal city is highly exposed and sensitive to sea-level rise.
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Then, analyse the population's adaptive capacity – their wealth, technology, education, and governance systems available to help them cope.
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Finally, synthesize these factors to evaluate the overall vulnerability and consider strategies, like building sea walls or diversifying livelihoods, to build resilience.
Explore the concept
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Key formulas
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$Vulnerability \propto \frac{Exposure + Sensitivity}{Adaptive , Capacity}$
Full topic notes
Formal explanation with the rigour you need for the exam.
Deconstructing Vulnerability
The Intergovernmental Panel on Climate Change (IPCC) provides a robust framework for understanding vulnerability. It is not simply about being poor or living in a hot country. Instead, it is a composite measure of three distinct components: exposure, sensitivity, and adaptive capacity. A high level of vulnerability arises from high exposure and sensitivity, combined with a low adaptive capacity.
Conceptual Formula: $Vulnerability \propto \frac{Exposure + Sensitivity}{Adaptive , Capacity}$
Exposure: Is the location or group in the path of the hazard? E.g., A coastal community is exposed to sea-level rise and storm surges.
Sensitivity: How much would the hazard affect them? E.g., A community dependent on coral reef tourism is highly sensitive to ocean acidification and warming.
Adaptive Capacity: What is their ability to adjust and cope? E.g., A wealthy, well-governed nation can afford to build advanced sea defences and has insurance schemes, indicating high adaptive capacity.
Global Hotspots of Vulnerability
Vulnerability to climate change varies significantly at all scales, from global to local. Certain regions and demographic groups consistently emerge as 'hotspots'. These often include low-lying coastal zones, semi-arid regions dependent on agriculture, and communities living on marginal land. Within any population, the elderly, children, women, and indigenous peoples often face heightened vulnerability due to social, economic, and cultural factors.
Building Resilience: Adaptation and Mitigation Strategies
In response to climate change, societies have two main levers: mitigation and adaptation. Mitigation tackles the causes of climate change by reducing greenhouse gas emissions, while adaptation manages the consequences. Building resilience is the ultimate goal, creating systems that can absorb shocks and reorganise while retaining their essential functions. Effective resilience strategies often involve a portfolio of approaches, from large-scale engineering projects to community-based social changes.
Hard Adaptation Strategies: These are typically technological or engineering-based solutions. Examples include building sea walls, dams, and irrigation systems.
Soft Adaptation Strategies: These are policy, legislative, social, or community-based solutions. Examples include livelihood diversification, establishing early warning systems, and creating conservation areas like mangrove forests to act as natural buffers.
Mitigation Strategies: These focus on reducing GHG sources or enhancing sinks. Examples include transitioning to renewable energy (solar, wind), afforestation projects, and promoting public transport.
For Paper 2 Section C questions, you must use detailed, located examples. Instead of saying 'LICs build sea walls', state 'Bangladesh, with support from the World Bank, has constructed over 5,000 km of coastal embankments to protect against storm surges and flooding, though maintenance remains a challenge'. This level of detail, linking place, strategy, and evaluation, is crucial for accessing the higher markbands.
Worked examples
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Using a specific, named example, explain why a community in a Small Island Developing State (SIDS) is highly vulnerable to climate change. [4 marks]
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High Exposure: Kiribati is a nation of low-lying coral atolls, with most land less than 2 metres above sea level. This makes it extremely exposed to sea-level rise and saltwater intrusion into freshwater lenses. [1]
Examine the strategies used by one named high-income country (HIC) to build resilience to the impacts of climate change. [6 marks]
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A strong answer would focus on a country like the Netherlands and its multi-faceted approach to water management.
How it all connects
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Glossary
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Quick check
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Revision flashcards
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Vulnerability (to climate change)
The propensity or predisposition to be adversely affected by climate change. It encompasses exposure, sensitivity, and a lack of adaptive capacity.
Key takeaways
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Exposure: Is the location or group in the path of the hazard? E.g., A coastal community is exposed to sea-level rise and storm surges.
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Sensitivity: How much would the hazard affect them? E.g., A community dependent on coral reef tourism is highly sensitive to ocean acidification and warming.
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Adaptive Capacity: What is their ability to adjust and cope? E.g., A wealthy, well-governed nation can afford to build advanced sea defences and has insurance schemes, indicating high adaptive capacity.
Practice — then mark it
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Test Your Knowledge on Vulnerability and Resilience
Test Your Knowledge on Vulnerability and Resilience
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Checkpoint
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