Prevailing winds - Wikipedia
The Coriolis effect causes the trade winds to blow toward the west. the winds from the north and the winds from the south meet at the equator 60º latitude is known as prevailing westerlies because the wind comes from the. Prevailing winds are winds that blow predominantly from an individual direction over a In general, easterly flow occurs at low and medium latitudes globally. In the mid-latitudes, westerly winds are the rule and their strength is largely. Westerlies The westerlies (blue) and trade winds (yellow) The westerlies, type of cyclone generally occurs outside of the tropics, in the middle latitudes of the planet .. Columbus proposed to reach the East Indies (South and Southeast Asia) by .. in the British colony of Victoria as the third of eight children to Irish parents.
The westerlies are particularly strong, especially in the Southern Hemisphere, in areas where land is absent, because land amplifies the flow pattern, making the current more north-south oriented, slowing the westerlies.
The strongest westerly winds in the middle latitudes can come in the roaring fortiesbetween 40 and 50 degrees latitude. The westerlies play an important role in carrying the warm, equatorial waters and winds to the western coasts of continents, especially in the southern hemisphere because of its vast oceanic expanse.
What are the prevailing westerlies?
Behavior If the Earth were a non-rotating planetsolar heating would cause winds across the mid-latitudes to blow in a poleward direction, away from the subtropical ridge. However, the Coriolis effect caused by the rotation of Earth causes winds to steer to the right of what would otherwise be expected across the Northern Hemisphere, and left of what would be expected in the Southern Hemisphere.
This occurs when the Arctic oscillation is positive, and during winter low pressure near the poles is stronger than it would be during the summer. When it is negative and pressures are higher over the poles, the flow is more meridional, blowing from the direction of the pole towards the equatorwhich brings cold air into the mid-latitudes.
Westerlies | Revolvy
As the cyclone reaches its maximum intensity in winterthe westerlies increase in strength. As the cyclone reaches its weakest intensity in summerthe Westerlies weaken.
In the Southern hemisphere, because of the stormy and cloudy conditions, it is usual to refer to the westerlies as the roaring forties, furious fifties, or shrieking sixties according to the varying degrees of latitude.
The currents in the Northern Hemisphere are weaker than those in the Southern Hemisphere due to the differences in strength between the westerlies of each hemisphere. Ships crossing both oceans have taken advantage of the ocean currents for centuries.
Global Winds: Trade Winds, Westerlies and Polar Easterlies
The ACC is the dominant circulation feature of the Southern Ocean and, at approximately Sverdrupsthe largest ocean current. The warm air is less dense and so it rises. This rising air over the land lowers the sea level pressure by about 0. The cooler air above the sea, now with higher sea level pressure, flows towards the land into the lower pressure, creating a cooler breeze near the coast.
The strength of the sea breeze is directly proportional to the temperature difference between the land mass and the sea. At night, the land cools off more quickly than the ocean due to differences in their specific heat values, which forces the daytime sea breeze to dissipate. If the temperature onshore cools below the temperature offshore, the pressure over the water will be lower than that of the land, establishing a land breeze, as long as an onshore wind is not strong enough to oppose it.
The wind flows towards a mountain and produces a first oscillation A.
A second wave occurs further away and higher. The lenticular clouds form at the peak of the waves B. Over elevated surfaces, heating of the ground exceeds the heating of the surrounding air at the same altitude above sea level, creating an associated thermal low over the terrain and enhancing any lows which would have otherwise existed,   and changing the wind circulation of the region. In areas where there is rugged topography that significantly interrupts the environmental wind flow, the wind can change direction and accelerate parallel to the wind obstruction.
Jagged terrain combines to produce unpredictable flow patterns and turbulence, such as rotors. Strong updraftsdowndrafts and eddies develop as the air flows over hills and down valleys. Wind direction changes due to the contour of the land.
If there is a pass in the mountain range, winds will rush through the pass with considerable speed due to the Bernoulli principle that describes an inverse relationship between speed and pressure. The airflow can remain turbulent and erratic for some distance downwind into the flatter countryside.
These conditions are dangerous to ascending and descending airplanes.