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Explain the role of cryospheric change in the water cycle. - AQA - A-Level Geography - Question 1 - 2018 - Paper 1

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Explain the role of cryospheric change in the water cycle.

Worked Solution & Example Answer:Explain the role of cryospheric change in the water cycle. - AQA - A-Level Geography - Question 1 - 2018 - Paper 1

Step 1

Cryospheric change has a regulatory role in sea levels.

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Answer

The cryosphere is a major store of water, and when it undergoes change, it directly influences sea levels. For example, during a period of warming, the melting of ice contributes to rising sea levels, affecting coastal ecosystems and human settlements.

Step 2

Seasonal effects of the cryosphere on the water cycle.

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Answer

In a period of cooling (glacial period), the cryosphere will grow in size. This significantly slows down the water cycle, as the ice restricts the return of the water to the sea and ocean.

Step 3

The role of melting ice in the water cycle.

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Answer

During warming periods, the cryosphere enhances the water cycle by adding water to it, as melting ice contributes additional water that eventually flows back to the sea.

Step 4

Thermal expansion and changes in permafrost.

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Answer

The increase in the size of ocean store causes sea levels to rise through thermal expansion, which is also associated with increased volumes of water from melting glaciers and ice sheets. Additionally, consideration of changes in permafrost can contribute to the dynamics of the water cycle.

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