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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.
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]
The cold prevailing northwesterly wind from Greece continuously blows over the northern coast without the interposition of an eventual mountain range and thus, greatly moderates temperatures throughout the year. Because of the effect, average low temperatures vary from 15 °C (59 °F) in wintertime to 27–35 °C (80.6–95.0 °F) in summertime ...
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]
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 ...
Egypt has signed and ratified the Paris Agreement, as well as submitted a nationally determined contribution (NDC) which sets priority areas as sustainability of agriculture, water resources, the environment, energy, and land management. [4] Egypt is located on the northeast of the continent of Africa.
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 ...
Egypt's fresh water is mainly derived from underground water. Underground water results in 95% of Egyptian's desert land. Egypt is also dependent on rainwater but it is a scarce and limiting source for agricultural development. In addition, Egypt refuses agricultural drainage water in correlation with Nile water for irrigation. [2]