Winds Nikki Donoughe

Global Winds- wind patterns that blow in a fairly constant, steady direction across our earth.

Global winds are composed of three different wind patterns: trade winds, polar easterlies and westerlies.

Global convention currents- Convection currents on a large scale cause global winds; convection currents on a small scale cause local winds. convection currents in the ocean are convection cells that contain warmer water.

The Coriolanus Effect- The Coriolis effect is the apparent curvature of global winds, ocean currents, and everything else that moves freely across the Earth's surface.

The Global Wind Belts are divided into three belts

Polar Easterlies: From 60-90 degrees latitude.

Prevailing Westerlies: From 30-60 degrees latitude (aka Westerlies).

Tropical Easterlies: From 0-30 degrees latitude (aka Trade Winds).

Doldrums-the belt around the Earth near the equator where sailing ships sometimes get stuck on windless waters.

Horse Latitudes- a belt of calm air and sea occurring in both the northern and southern hemispheres between the trade winds and the westerlies.

Trade Winds-trade winds are the prevailing pattern of easterly surface winds found in the tropics, within the lower portion of the Earth's atmosphere, in the lower section of the troposphere near the Earth's equator.

Prevailing Westerlies- The westerlies, anti-trades, or prevailing westerlies, are prevailing winds from the west toward the east in the middle latitudes between 30 and 60 degrees latitude

Polar Easterlies- 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.

Jet Streams-a narrow, variable band of very strong, predominantly westerly air currents encircling the globe several miles above the earth. There are typically two or three jet streams in each of the northern and southern hemispheres.


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