The Bora is a katabatic wind, which comes from the Greek word for “descending.” It is caused by cold, dense air sitting over high plateaus. Gravity pulls this heavy air down the mountain slopes toward the warmer coast. Because the air is falling due to its own weight, it can reach incredibly high, destructive speeds. ANSWER: (C) Katabatic Wind
Which type of wind is the “Bora” classified as? (A) Thermal Wind (B) Foehn Wind (C) Katabatic Wind (D) Monsoon Wind
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A katabatic wind like the Bora occurs when a large mass of air is chilled by a snow-covered plateau or mountain range at night. This air becomes much denser and heavier than the air in the valleys below. Gravity acts as the driver, pulling this heavy “pool” of cold air down the slopes. As it rushes downhill, it gains kinetic energy. Unlike the Foehn or Chinook, which are warm, the Bora remains cold because it starts at such a freezing temperature that even the heat of compression during its descent isn’t enough to make it warm.
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