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Wind and moist air are drawn by the prevailing winds towards the top of the mountains, condensing and precipitating before it crosses the top. In an effect opposite that of orographic lift, the air, without much moisture left, advances behind the mountains, creating a drier side called the "rain shadow". [citation needed]
It forms above the mountain range, usually at the beginning of a chinook wind as a result of orographic lifting over the range. It appears when seen from downwind to form an arch over the mountain range. A layer of clear air separates it from the mountain. [3] A view of the Front Range of the Rockies capped by a föhn wall.
An orographic map of Eastern Siberia from 1875 by Peter Kropotkin. 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]
Effect of a rain shadow The Tibetan Plateau (center), perhaps the best example of a rain shadow. Rainfalls from the southern South Asian monsoon do not make it far past the Himalayas (seen by the snow line at the bottom), leading to an arid climate on the leeward (north) side of the mountain range and the desertification of the Tarim Basin (top).
In general, Egypt is a very dry country. The Western Desert receives only occasional rainfall, the winters being mild and the summers very hot. The Eastern Desert receives some precipitation in the south in the form of orographic rainfall from winds that have crossed the Red Sea; this may cause torrential flows in the wadis. The winters here ...
Mokattam (upper area), above the City of the Dead—Cairo necropolis, in a 1904 aerial view by Eduard Spelterini from a hot air balloon. The area on election day, 2011. The Mokattam (Egyptian Arabic: المقطم [elmoˈʔɑtˤ.tˤɑm], also spelled Muqattam), also known as the Mukattam Mountain or Hills, is the name of an Eastern Desert plateau as well as the district built over it in the ...
After a video of a shark attack in Egypt went viral Tara Cobham investigates recent incidents across the world. ... Egypt’s Red Sea resorts, including Hurghada and Sharm El-Sheikh, boast some of ...
When the flow of dry air continuously blows over vast desert regions, it picks up fine sand and dust particles and finally results in a dusty wind which is generally felt in the periphery of the desert. When this wind blows over Egypt, it causes high temperatures to soar temporarily at dangerous levels, usually over 49–50 °C (120–122 °F ...