katabatic wind

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katabatic wind

[¦kad·ə¦bad·ik ′wind]
(meteorology)

Katabatic Wind

 

a flow of cold air down relatively gentle slopes of mountain ranges, caused by the force of gravity (in contrast to the bora, which blows down steep slopes). Such winds are observed primarily at night when the ground layer of air cools. They include glacier winds, which are more intense in the summer when the air above glaciers is especially cool relative to the air above the surrounding area at the same elevation. The most severe katabatic winds occur in Antarctica, where air flows from the high continental ice cap to the shores; these winds reach high velocities near the shores but do not extend farther than 8–10 km into the ocean. The direction of katabatic winds at the antarctic shore is most frequently southeast; this is a result of the meridional component of the wind and the eastward movement of air around a continent in the course of general atmospheric circulation.

katabatic wind

katabatic wind
The cold wind that flows down the slopes of the mountains and spreads at the base of the mountains.
References in periodicals archive ?
This site was chosen because of the particularly strong katabatic winds present there, as well as its wide expanse of open water surrounded by sea ice.
According to the observed katabatic winds and the evolution of the gradient Richardson number at z=3m and z=20m depicted in Fig.
Many of the nights were affected by easterly katabatic winds which increased the wind shear and eroded the surface inversion, soon after the sunset.
During the most stable nights (23, 25 and 30 June), the influence of the katabatic winds is less significant, higher values of the gradient Richardson number are achieved and minimum values of the turbulent parameters ([K.
I'm not sure what we're playing, but I like fast and jumpy music," says 12-year-old Clementine Goodings ( a bassoonist with Katabatic Winds who has ambitions to be a heart surgeon.
Katabatic Winds is a one-player-a-part (two in the clarinet section) ensemble bringing together 35 of the region's young wind, brass and percussion players.
In section 2, a description of the island and the region where the katabatic wind takes place is made.
The line chosen to study the wind dynamics of the katabatic wind is between the Randa peak and the airport, which is found at the center of the basin (Fig.
Furthermore, the relation between downslope windspeed and the slope suggests that the katabatic wind is modified by changes of the angle and by the interaction with the mountain wave, propagating the perturbations upwards and modulating the flow in the first thousand of meters above the ground.
k])) greater than one, as in present case, where Fr>l along the slope (not shown) and the katabatic wind can be considered a shooting flow in terms of the hydraulic theory.
k] along the slope for points where the buoyancy term is dominant (from the point located close to km 11, which is considered the origin of the katabatic wind, to km 4 in Fig.
The katabatic wind studied here has been analyzed taking into account the topographical characteristics of the island, which has a complex flow pattern in the nighttime.