What is Foehn condition?
What is the foehn effect? In simple terms, this is a change from wet and cold conditions one side of a mountain, to warmer and drier conditions on the other (leeward) side.
What is the definition of foehn in geography?
foehn, German Föhn, warm and dry, gusty wind that periodically descends the leeward slopes of nearly all mountains and mountain ranges. The name was first applied to a wind of this kind that occurs in the Alps, where the phenomenon was first studied.
What are examples of foehn winds?
Near the mountains of the western United States, foehn winds have been frequently documented, including the chinook winds near the Rocky Mountains (Oard 1993; Nkemdirim 1986), the Santa Ana winds near the mountains of southern California (Raphael 2003; Burroughs 1987), and the sundowner winds near the Santa Ynez …
What causes Foehn wind?
Foehn winds are caused by the subsidence of moist air after passing a high mountain. As the temperature decreases with height, the moist air will become saturated and condense to form clouds and rain when it rises to a certain height. The amount of water vapour that remains in the air therefore decreases.
What are foehn and Chinook Winds?
The wind off of the Rocky Mountains in North America is a foehn wind that is called a Chinook wind. The wind is a warm, dry wind that blows down the eastern slope of most mountains. Foehn winds are formed from warmer and drier air that flows from aloft or above.
Where does the word foehn come from?
The name Foehn (German: Föhn, pronounced [ˈføːn]) arose in the Alpine region. Originating from Latin (ventus) favonius, a mild west wind of which Favonius was the Roman personification and probably transmitted by Romansh: favuogn or just fuogn, the term was adopted as Old High German: phōnno.
Which type of local wind is foehn?
Foehn is a local wind of Switzerland. A föhn or foehn is a type of dry, warm, down-slope wind that occurs in the lee of a mountain range. Central Europe enjoys a warmer climate due to the Föhn, as moist winds off the Mediterranean Sea blow over the Alps.
What is Foehn and Chinook?
The wind off of the Rocky Mountains in North America is a foehn wind that is called a Chinook wind. The wind is a warm, dry wind that blows down the eastern slope of most mountains. Foehn winds are formed from warmer and drier air that flows from aloft or above. This wind has the same force of some hurricane winds.
Which is an example of the foehn effect?
A warm dry wind that blows down the lee side of a mountain. In order to describe the Foehn Effect and its resultant wind, an example like the one presented below is generally used. Values for temperature and mountain range elevations may vary.
What does the foehn effect do to the air?
Foehn effect. The foehn effect causes warming and drying of air on the lee side of cross mountain wind. In simple terms, this is a change from wet and cold conditions one side of a mountain, to warmer and drier conditions on the other (leeward) side.
What does the word foehn mean in German?
Foehn (or Föhn in German) refers to a warm southerly wind coming over the Alps. However, the word is now used to describe similar meteorological effects on mountains all over the world.
What does the foehn effect do to a mountain?
What is the foehn effect? In simple terms, this is a change from wet and cold conditions one side of a mountain, to warmer and drier conditions on the other (leeward) side.