The bottom of the valley at area M on the topographic map experiences frost during the early hours of the morning during winter - NSC Geography - Question 3 - 2018 - Paper 2
Question 3
The bottom of the valley at area M on the topographic map experiences frost during the early hours of the morning during winter.
3.1.1 Name the local/tertiary wind ... show full transcript
Worked Solution & Example Answer:The bottom of the valley at area M on the topographic map experiences frost during the early hours of the morning during winter - NSC Geography - Question 3 - 2018 - Paper 2
Step 1
Name the local/tertiary wind that is responsible for the formation of frost.
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Answer
The local wind responsible for the formation of frost at area M is the Katabatic wind.
Step 2
Explain how the wind named in QUESTION 3.1.1 causes frost.
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Answer
The Katabatic wind causes frost by cooling the air near the valley slopes. As the cooler air descends, it becomes dense and heavy. This dense cold air settles in the valley and can drop temperatures to below freezing at ground level, resulting in frost formation.