IB DP Geography Core: Global Climate – Vulnerability and Resilience – Revision Notes

The full syllabus guide confirms the SL/HL core (Geographic perspectives: global change) is identical in content and hours for every student, examined in Paper 2. These notes cover Global climate: vulnerability and resilience, alongside the Population distribution revision notes already on the site.

Why this core theme is universal (unlike the options)

Because the seven geographic-themes options are teacher-selected, revision material on an unstudied option is wasted. The core is different: every DP Geography student, regardless of school, studies Global climate as part of the shared 70-hour core, examined in Paper 2 for everyone. This makes it one of the highest-value topics to revise thoroughly, since it applies to every student without exception.

The three sub-topics

The IB Geography guide (first assessment 2019) divides this unit into three sub-topics:

1. Causes of global climate change – how natural and human processes affect the global energy balance: the natural greenhouse effect and energy balance (incoming shortwave, outgoing longwave radiation), and changes in the energy balance and the role of feedback loops, from factors including solar radiation variations (including global dimming due to volcanic eruptions) and terrestrial albedo changes. In brief: greenhouse gases absorb and re-emit some outgoing longwave radiation, warming the lower atmosphere, and human emissions enhance this; volcanic aerosols reflect sunlight and cause temporary cooling; melting ice lowers albedo, increasing absorption and warming (a positive feedback loop).
2. Consequences of global climate change – the effects of climate change; commonly studied effects include sea-level rise, changing rainfall patterns, more frequent or intense extreme weather, and impacts on ecosystems, farming, water supply and health.
3. Responding to global climate change – possibilities for responding and power over decision-making, including disparities in exposure to climate change risk and vulnerability (location, wealth, social differences such as age, gender and education, risk perception), detailed examples of two or more societies with contrasting vulnerability, government-led adaptation and mitigation strategies (global geopolitical efforts; carbon emissions offsetting and trading; technology, including geo-engineering), and civil society and corporate strategies, with a case study of one country’s response focusing on the actions of non-governmental stakeholders.

Core vocabulary

• Vulnerability – the degree to which a place, community or system is susceptible to harm from a climate hazard. These notes analyse it using exposure, sensitivity and adaptive capacity, a framework widely used in climate-change research; the IB guide itself does not use the terms sensitivity or adaptive capacity.
• Resilience – the capacity of a place or community to absorb, recover from, and adapt to climate-related disturbance.
• Adaptation – deliberate changes made in response to actual or expected climate impacts (for example, flood defences, drought-resistant crops).
• Mitigation – action taken to reduce the causes of climate change itself, distinct from adaptation’s focus on managing its effects.

Keep adaptation and mitigation clearly separate — a common error is using the two terms interchangeably, when they are distinct types of response.

Worked example: comparing vulnerability across two places

A question asks why two places facing a similar climate hazard (e.g. flooding) might experience very different outcomes.

Exposure:          both places face a similar physical hazard
                    (rising flood risk)
Sensitivity:        Place A has more people living in low-lying,
                    poorly built housing; Place B has stronger
                    building codes and better drainage infrastructure
Adaptive capacity:  Place A has fewer economic resources and weaker
                    institutions to respond; Place B has greater
                    financial and institutional capacity to invest in
                    defences and recovery
Conclusion:         vulnerability is not just about the SIZE of the
                    hazard but the combination of exposure, sensitivity
                    and adaptive capacity -- two places facing an
                    identical hazard can have very different outcomes

Breaking vulnerability down in this way (this resource’s framework, not the guide’s terms) and linking each part to the guide’s named factors, such as wealth or location, gives a more analytical answer than just describing that “one place is more vulnerable”.

Named, specific case studies

As with every DP Geography theme, generic description scores lower than named, specific case studies with real dates, locations and figures. Build a small bank of specific vulnerability/resilience examples (a named flood event, drought, or heatwave with its human and policy response) that can be reused flexibly across different Paper 2 core questions.

Connecting to the geographic-themes options

Because the core is examined separately from the options, avoid the temptation to blend Global climate content into an option answer (or vice versa) without being explicit about which paper’s content you are using. That said, genuine thematic overlap exists — Extreme environments and Geophysical hazards both touch on climate-related vulnerability — so if your class studied either option, practise clearly distinguishing an option-specific point from a core Global climate point, since Paper 1 and Paper 2 are marked against different prescribed content even where the underlying geography is related.

HL extension connections

At HL, Global risks and resilience (part of the HL-only extension examined in Paper 3) builds directly on the core’s vulnerability and resilience vocabulary, applying it to interconnected global systems more broadly rather than climate specifically. HL students who have a secure grip on this core theme’s vocabulary will find the extension’s own vulnerability-and-resilience content considerably more accessible, since the underlying concepts transfer directly even though the scale and scope of the content differ.

Exam traps

• Confusing adaptation (managing a hazard’s effects) with mitigation (reducing the hazard’s causes).
• Describing vulnerability in general terms without breaking it down into the factors that make one place or group more vulnerable (location, wealth, social differences, risk perception).
• Presenting exposure, sensitivity and adaptive capacity as IB-specified terms rather than an analytical framework.
• Revising only responses and neglecting the causes (energy balance, greenhouse effect, feedback loops) and consequences sub-topics.
• Using vague, unnamed examples (“a developing country”) instead of a specific, named place and event.
• Assuming this theme is optional — it is compulsory core content examined in Paper 2 for every student.

Linking to the fieldwork report

This unit is not a good basis for the fieldwork report. The IB guide lists “Unit 2: Global climate vulnerability and resilience” among the topics “unlikely to be suitable for fieldwork investigation”, and states that global issues are unsuitable for study unless they can be adapted to the local scale. Choose a topic that allows a genuinely testable question with primary data collected locally, and check your choice with your teacher.

Self-test

1. Name the three sub-topics of Global climate: vulnerability and resilience.
2. Distinguish adaptation from mitigation.
3. Why is Global Climate a higher-value revision priority than any single geographic-themes option?
4. What kind of evidence does a strong Paper 2 core answer use to support its argument?
5. Which paper examines the SL/HL core content?

Keeping this theme’s vocabulary and case-study bank genuinely separate from option-specific material, while still noting where the two legitimately connect, is the balance this core theme’s revision requires.

Answers: 1. Causes of global climate change; consequences of global climate change; responding to global climate change. 2. Adaptation manages the effects of climate change already occurring (e.g. flood defences); mitigation acts to reduce the underlying causes of climate change itself. 3. Because it is compulsory core content for every DP Geography student, unlike the options, which are teacher-selected and therefore vary between classes. 4. Named, specific case studies with real dates, locations and figures, rather than generic description. 5. Paper 2.