Anabatic Winds are upslope winds driven by warmer surface temperatures on a mountain slope than the surrounding air column. Katabatic. Katabatic wind · Local wind system. Anabatic wind, also called upslope wind, local air current that blows up a hill or mountain slope facing the Sun. During the . Katabatic wind (from the Greek: katabaino – to go down) is the generic term for downslope winds These winds are known as valley wind or anabatic wind.
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At scales ranging from the slopes of individual hills and mountains to the slopes of mountain ranges and massifs, anabatic flows represent the daytime component of mountain—plains wind systems.
Anabatic wind |
Internet URLs are the best. Personal tools Log in. These winds typically occur during the daytime in calm sunny weather. When the lower elevations are hot desert annd the temperature differences can be quite substantial on the order of 60 to 70 degrees F.
Discovery of the Jet Stream. North Atlantic Drift Gulf Stream.
These can then produce rain or even thunderstorms. Most katabatic winds except the Foehn are more or less the result of air in contact with upper level ground is cooled by radiation, increases in density, and flows downhill and along windz valley bottom. Air at a similar altitude over an adjacent valley or plain does not get warmed so much because of the greater distance to the ground below it. Anabatic wind Written By: However, katabatic winds might also reach gale force as an outblowing wind over ice-covered surfaces in Antarctica and Greenland, where the wind may be extremely strong anabtic gusty near the coasts and less severe in mountain regions.
Katabatic and Anabatic Winds
As the air warms, its katahatic increases, and hence density and pressure decreases. An anabatic windfrom the Greek anabatosverbal of anabainein meaning moving upward, is a warm wind which blows up a steep slope or mountain side, driven by heating of the slope through insolation.
The mechanism of the anabatic wind can be described as follows.
Slopes occur on many scales, and consequently anabatic flows also occur on many scales. The effect may be enhanced if the lower lying ground is shaded by the mountain and so receives less heat.
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Anabatic winds can be detrimental to the maximum downhill speed of cyclists. Discover some of the most interesting and trending topics of Average rainfall over England and Wales.
We welcome suggested improvements to any of our articles. Jet stream cirrus from space. This page was last edited on 5 Novemberat Katabatic flows slumping down from uplands or mountains may be funneled and strengthened by the landscape and are then known as mountain gap wind such as the Santa Anamountain breeze or drainage wind.
Drifting snow – blowing snow. Monsoon winds are similarly latabatic, but on a continental scale and seasonal cycle. Please note that our editors may make some formatting changes or correct spelling or grammatical errors, and may also contact you if any clarifications are needed. Katabatic wind from the Greek: The greater the temperature difference the stronger the wind.
Anabatic wind – AMS Glossary
Predominantly a day time phenomenon, anabatic wind may flow further than the orographic tops, cooling as it rises vertically convectiondry-adiabatically.
More air rises from below to replace it, producing a wind. Speeds in the mountain—valley anabatic flow layer are often 3—5 m s Key to winde weather symbols.
We call these wind modifiers and will talk about them in future blogs. Your contribution may be further edited by our staff, and its publication katabattic subject to our final approval.