circumpolar westerlies

circumpolar westerlies

[¦sər·kəm′pō·lər ′wes·tər‚lēz]
(meteorology)
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Knowledge of these circumpolar westerlies in the stratosphere can be traced to the late 1940s (e.
The strong circumpolar westerlies that define the stratospheric polar vortex maximize at around 60[degrees] latitude, from just above the tropopause (-100 hPa) into the mesosphere (above 1 hPa; see Fig.
That temperature gradient is the driving force for strong, steady winds that blow from the west over the seas off Antarctica's coast at latitudes of about 50[degrees]S--the circumpolar westerlies.
Warming of the lower stratosphere would slow the circumpolar westerlies but strengthen winds at lower latitudes, a combination that would significantly shift weather patterns.
Recent abnormally warm weather in Asia and Europe is due to circumpolar westerlies which have prevented cold air above the arctic circle from moving southward, Japan's Meteorological Agency said Wednesday.
Circumpolar westerlies usually snake above the Eurasia continent allowing cold air to move southward, the agency said, adding that this winter they are blowing from west to east, blocking the cold air, resulting in the high-temperature phenomenon seen once every 30 years.