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As warm, moist air rises up the windward side of a mountain, the air temperature cools and loses its capacity to hold moisture. Thus, the greatest amount of rainfall is expected at mid-altitudes and can support deciduous forest development. Above a certain elevation the rising air becomes too dry and cold, and thus discourages tree growth. [9]
The terms windward and leeward are used in reference both to sides (and climates [7]) of individual islands and relative island locations in an archipelago. The windward side of an island is subject to the prevailing wind, and is thus the wetter (see orographic precipitation). The leeward side is the side distant from or physically in the lee ...
Föhn wind illustration (Left [West]: windward side, Right [East]: leeward side). The southeast Australian foehn is distinguished by three criteria; surface winds which blow from the mountains' direction, a sharp rise in air temperature in the leeward side of the mountains, and an accompanying diminution in atmospheric moisture. [2]
Orography is the study of the topographic relief of mountains, [1] and can more broadly include hills, and any part of a region's elevated terrain. [2] Orography (also known as oreography, orology, or oreology) falls within the broader discipline of geomorphology. [3] The term orography comes from the Greek: όρος, hill, γράφω, to write.
The valley of the Vardar River and south from Skopje to Athens is in the rain shadow of the Accursed Mountains and Pindus Mountains. On its windward side the Accursed Mountains has the highest rainfall in Europe at around 5,000 millimetres (200 in) with small glaciers even at mean annual temperatures well above 0 °C (32 °F), but the leeward ...
At night, the sides of the hills cool through radiation of the heat. The air along the hills becomes cooler and denser, blowing down into the valley, drawn by gravity. This is known a mountain breeze. If the slopes are covered with ice and snow, the mountain breeze will blow during the day, carrying the cold dense air into the warmer, barren ...
The Santa Anas are katabatic winds (Greek for "flowing downhill") arising in higher altitudes and blowing down towards sea level. [7] The National Weather Service defines Santa Ana winds as "a weather condition [in southern California] in which strong, hot, dust-bearing winds descend to the Pacific Coast around Los Angeles from inland desert regions".
The mountains and plateaus, which consist of limestones, sandstone, quartzite, schists and dolomite, have been created by faulting and folding processes. [5] The crests of the Great Dividing Range is defined by the watershed boundary between the drainage basins of river systems east (the coastal or rainward side) and west (the inland or leeward ...