(meteorology) The rather shallow and diffuse body of easterly winds located poleward of the subpolar low-pressure belt; in the mean in the Northern Hemisphere, these easterlies exist to an appreciable extent only north of the Aleutian low and Icelandic low.
Polar easterlies
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(′pō·lər ′ēs·tər′lēz)
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The polar easterlies (also 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 low-pressure areas within the Westerlies at high latitudes.[1] Cold air subsides at the pole creating the high pressure, forcing a southerly (northward in the southern hemisphere) outflow of air towards the equator; that outflow is then deflected westward by the Coriolis effect. Unlike the westerlies in the middle latitudes, the polar easterlies are often weak and irregular. These prevailing winds blow from the east to the west.
The Hadley cells are also called trade winds and run easterly, named after George Hadley who first described them in 1753.
References
- ^ Glossary of Meteorology (2009).They are called Easterlies because the blow from the east [http://amsglossary.allenpress.com/glossary/search? .p=1&query=polar+easterlies&submit=Search Polar easterlies.] American Meteorological Society. Retrieved on 2009-04-15.
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