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A Foehn, or Föhn (UK: / f ɜː n /, US: / f eɪ n / fayn, [2] [3] US also / f ʌ n, f ɜːr n / fu(r)n [4] [5]), is a type of dry, relatively warm downslope wind in the lee of a mountain range. It is a rain shadow wind that results from the subsequent adiabatic warming of air that has dropped most of its moisture on windward slopes (see ...
A difference in air pressure causes an air displacement and generates the wind. The Coriolis force deflects the air movement to the right in the northern hemisphere and the left in the southern one, which makes the winds parallel to the isobars on an elevation in pressure card. [1] It is also referred as the geostrophic wind. [2]
Foehn winds usually occur when the westerly wind belt moves northwards. [7]The foehn effect on the coastal plains of southeastern Australia is mostly linked with the passage of a deep low pressure system or westerly cold fronts across the Great Australian Bight and southeastern Australia that cause strong winds to reorient virtually perpendicular to some parts of the Great Dividing Range ...
Euroclydon (a cyclonic tempestuous northeast wind in the Mediterranean) Föhn or foehn (a warm, dry, southerly wind off the northern side of the Alps and North Italy. The name gave rise to the fén-fēng (焚風 'burning wind') of Taiwan). Gregale (northeasterly from Greece) Halny (in northern Carpathians) Helm (north-easterly wind in Cumbria ...
The name föhn was originally used to refer to the south wind which blows during the winter months and brings thaw conditions to the northern side of the Alps. Because föhn later became a generic term that was extended to other mountain ranges around the world that experience similar phenomena, the name "Alpine föhn" ( Alpenföhn ) was coined ...
Diagram showing the Foehn effect creating the Zonda. The Zonda is a dry wind (often carrying dust) which comes from the polar maritime air, warmed by descent from the crest, which is approximately 6,000 m (20,000 ft) above sea level. It may exceed a velocity of 240 km/h (150 mph).
Halny is a foehn wind that blows in southern Poland and in Slovakia in the Tatra Mountains of the Carpathians. [1] The most turbulent halny blows in Podhale region of southern Poland, coming from the south, down the slopes of the Tatra Mountains; in Slovakia, on the other side of the mountains, it comes from the north.
The name "föhn" was originally used to refer to the south wind which blows during the winter months and brings thaw conditions to the northern side of the Alps. Because föhn later became a generic term that was extended to other mountain ranges around the world that experience similar phenomena, the name "Alpine föhn" ( Alpenföhn ) was coined.