Match these geoengeneering approaches with the part of the atmosphere the influence
1: SO2 injection into stratosphere
2: Land use management
3: Natural Weathering
4: White roofs in human settlements

Question

BlackTom AI · Accepted Answer

Here is the matching task restated and analyzed step by step to clarify how each geoengineering approach aligns with its atmospheric influence targets.

Option 1 (SO2 injection into stratosphere) needs to be paired with the effect it primarily aims to achieve. Sulfate aerosols formed from SO2 increase the scattering of sunlight, leading to a reduction in the amount of solar radiation reaching the Earth's surface. This aligns best with the target: Reduction of solar energy hitting ground. In other words, the purpose is to cool by reflecting more sunlight away before it warms the surface, making this match a reasonable one.

Option 2 (Land use management) involves managing terrestrial ecosystems and vegetation cover to influence carbon dynamics. A central outcome of many land-use strategies is enhanced carbon uptake and storage in plants and soils, i.e., Capturing of CO2 in plants. This is a direct fit because biophysical carbon sequestration in vegetation is a principal mechanism of land-use approaches for climate mitigation.

Option 3 (Natural Weathering) refers to the geochemical process where silicate rocks react with CO2 over long timescales, ultimately forming stable carbonates and removing CO2 from the atmosphere. The target that captures this mechanism is Turn silicates to carbonates to remove CO2. This is a canonical description of natural or enhanced weathering pathways as a CO2 sink.

Option 4 (White roofs in human settlements) are a classic example of solar radiation management at the surface: increasing the albedo of the built environment reduces how much solar energy is absorbed by surfaces and subsequently lowers local and regional temperatures. Therefore, the appropriate target is Increase albedo and reduce solar energy absorbed by surface. Although the same albedo effect can be conceptually linked to multiple strategies, this option specifically exemplifies the surface-reflection aspect.

Note on potential overlaps: Some targets can conceptually align with more than one intervention (for example, higher albedo can result from both SO2-induced aerosol scattering and white roofs). In this exercise, we map each option to the most direct, primary atmospheric influence described in typical geoengineering taxonomies to minimize ambiguity.

If you needed a one-to-one mapping list, it would read:
- 1 → Reduction of solar energy hitting ground
- 2 → Capturing of CO2 in plants
- 3 → Turn silicates to carbonates to remove CO2
- 4 → Increase albedo and reduce solar energy absorbed by surface

25S-A&O SCI-2-LEC-1 / 25S-A&O SCI-2-LEC-2 Lesson 5f. Global Climate Change: Remediation - Quiz

Match these geoengeneering approaches with the part of the atmosphere the influence 1: SO2 injection into stratosphere 2: Land use management 3: Natural Weathering 4: White roofs in human settlements

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