Prevailing Winds - Effect On Precipitation

Effect On Precipitation

Orographic precipitation occurs on the windward side of mountains and is caused by the rising air motion of a large-scale flow of moist air across the mountain ridge, resulting in adiabatic cooling and condensation. In mountainous parts of the world subjected to consistent winds (for example, the trade winds), a more moist climate usually prevails on the windward side of a mountain than on the leeward or downwind side. Moisture is removed by orographic lift, leaving drier air (see katabatic wind) on the descending and generally warming, leeward side where a rain shadow is observed.

In South America, the Andes mountain range blocks Pacific moisture that arrives in that continent, resulting in a desertlike climate just downwind across western Argentina. The Sierra Nevada range creates the same effect in North America forming the Great Basin and Mojave Deserts.

Read more about this topic:  Prevailing Winds

Famous quotes containing the words effect on and/or effect:

    Living more lives than one, knowing people of all classes, all shades of opinion, monarchists, republicans, socialists, anarchists, has had a salutary effect on my mind. If every year of my life, every month of the year, I had lived with reformers and crusaders I should be, by this time, a fanatic. As it is I have had such varied things to do, I have had so many different contacts that I am not even very much of a crank.
    Rheta Childe Dorr (1866–1948)

    Thinking is seeing.... Every human science is based on deduction, which is a slow process of seeing by which we work up from the effect to the cause; or, in a wider sense, all poetry like every work of art proceeds from a swift vision of things.
    HonorĂ© De Balzac (1799–1850)