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Using Figure 8 and your own knowledge, assess the relative importance of factors leading to the development of this landscape - AQA - A-Level Geography - Question 4 - 2021 - Paper 1
Question 4
Using Figure 8 and your own knowledge, assess the relative importance of factors leading to the development of this landscape. Note: There are thousands of small, m... show full transcript
Worked Solution & Example Answer:Using Figure 8 and your own knowledge, assess the relative importance of factors leading to the development of this landscape - AQA - A-Level Geography - Question 4 - 2021 - Paper 1
Step 1
Assess the role of thermokarst in landscape development
Answer
The image depicts a periglacial landscape characterized by the presence of thermokarst features, which are formed when the permafrost melts. This process results in the formation of ice-wedge polygons and various sized lakes due to the subsidence of the ground. Thermokarst leads to distinctive landforms, creating a unique topography that promotes diverse ecological conditions.
Step 2
Evaluate the impact of local relief and geomorphology
Answer
Local relief plays a significant role in determining how quickly the ice thaws. Areas with gentle slopes may promote accumulation and stagnation of meltwater, leading to increased lake formation. In contrast, steeper areas may facilitate drainage, affecting the distribution of water bodies. The geological features, such as type of soil and rock beneath the surface, also influence heat retention and permafrost thickness, further affecting the rate of melting.
Step 3
Discuss climatic influences on ice melt
Answer
The image depicts an early summer landscape, indicating that seasonal temperature variations significantly impact the thawing process. Warmer temperatures accelerate ice melt, while fluctuations in precipitation can affect moisture availability in the area. Additionally, climate change leads to longer thaw periods, which can drastically alter the landscape over time and influence the characteristics observed in the photograph.
Step 4
Consider human influences and their role in landscape alteration
Answer
Although the image primarily reflects natural processes, human activities in nearby areas could indirectly impact the periglacial landscape. For example, land use changes, such as agriculture or urban development, could affect drainage patterns and local climate conditions. Such changes might contribute to accelerated melting of permafrost through increased heat and alteration of natural water cycles.