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The westerlies (blue arrows) and trade winds (yellow and brown arrows) 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 ...
The westerlies, anti-trades, [2] or prevailing westerlies, are prevailing winds from the west toward the east in the middle latitudes between 30 and 60 degrees latitude. They originate from the high-pressure areas in the horse latitudes (about 30 degrees) and trend towards the poles and steer extratropical cyclones in this general manner. [ 3 ]
The westerlies play an important role in carrying the warm, equatorial waters and winds to the western coasts of continents, [13] [14] especially in the southern hemisphere because of its vast oceanic expanse. The westerlies explain why coastal Western North America tends to be wet, especially from Northern Washington to Alaska, during the winter.
The European Monsoon (more commonly known as the return of the westerlies) is the result of a resurgence of westerly winds from the Atlantic, where they become loaded with wind and rain. [60] These westerly winds are a common phenomenon during the European winter, but they ease as spring approaches in late March and through April and May.
The quasi-biennial oscillation (QBO) is a quasiperiodic oscillation of the equatorial zonal wind between easterlies and westerlies in the tropical stratosphere with a mean period of 28 to 29 months. The alternating wind regimes develop at the top of the lower stratosphere and propagate downwards at about 1 km (0.6 mi) per month until they are ...
A western disturbance is an extratropical storm originating in the Mediterranean region that brings sudden winter rain to the northwestern parts of the Indian subcontinent, [1] [2] which extends as east as up to northern parts of Bangladesh and South eastern Nepal. [3] It is a non-monsoonal precipitation pattern driven by the westerlies.
Note that the boundary between the westerlies and the trade winds moves north in summer and south in winter. Portuguese route to India, outbound in red, return route in blue. Northwest Africa: Those sailing from Europe leave the Strait of Gibraltar and soon hit the Canary Current, which pushes them southwest down the African coast.
Winter Holiday is the fourth novel of Arthur Ransome's Swallows and Amazons series of children's books. It was published in 1933. In this story, the third set of major characters in the series, the Ds — Dick and Dorothea Callum—are introduced. The series' usual emphasis on boats and sailing is largely absent, as the story is set in the winter.