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In the study of Earth's atmosphere, polar easterlies are the dry, cold prevailing winds that blow around the high-pressure areas of the polar highs at the North and South Poles. [1] Cold air subsides at the poles creating high pressure zones, forcing an equatorward outflow of air; that outflow is then deflected westward by the Coriolis effect.
The polar easterlies (also known as Polar Hadley cells) are the dry, cold prevailing winds that blow from the high-pressure areas of the polar highs at the North and South Poles towards the low-pressure areas within the westerlies at high latitudes.
The trade winds or easterlies are permanent east-to-west prevailing winds that flow in the Earth's equatorial region. The trade winds blow mainly from the northeast in the Northern Hemisphere and from the southeast in the Southern Hemisphere , strengthening during the winter and when the Arctic oscillation is in its warm phase.
The easterly Trade Winds and the polar easterlies have nothing over which to prevail, as their parent circulation cells are strong enough and face few obstacles either in the form of massive terrain features or high pressure zones. The weaker Westerlies of the Ferrel cell, however, can be disrupted.
The sun set on the small Alaskan town of Utqiaġvik at 1:37 pm local time on November 18, and won’t be rising until January 22nd, as it entered polar night, according to the National Weather ...
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, England) Košava (strong and cold southeasterly season wind in Serbia) [13]
The northern hemisphere and the southern hemisphere each have a polar jet around their respective polar vortex at around 30,000 ft (5.7 mi; 9.1 km) above sea level and typically travelling at around 110 mph (180 km/h) although often considerably faster. [2] Closer to the equator and somewhat higher and somewhat weaker is a subtropical jet. [2]
The polar easterlies, ... On Uranus, northern hemisphere wind speeds reach as high as 240 meters per second (540 mph) near 50 degrees north latitude.