Shade
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225863629
2008-07-15T19:25:16Z
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[[Image:A dozen species growing in the shade.jpg|thumb|right|400px|A dozen different species of plants growing in the shade]]
'''Shade''' is the blocking of [[sunlight]] (in particular direct sunshine) by any object, and also the [[shadow]] created by that object. It may refer to blocking of sunlight by a roof, a [[tree]], an [[umbrella]], a [[window blind|window shade or blind]], [[curtains]], or other objects.
Shade is an important issue in [[temperate]] and [[tropical]] zones for providing cooling and shelter from the [[sun]]. Providing certain configurations of shading is an important [[passive solar]] technique. This may be done with overhangs, with [[shade tree]]s, or with [[vine]]s. Vines particularly suited for this purpose include [[Boston ivy]], [[Virginia creeper]], and [[morning glory]].
Shade offers relief to golfers and sportsmen of many types. Careful consideration must be taken when removing trees near tees and other clog points on a golf course routing. It has been shown that the shade from a natural tree can be several degrees cooler than that provided by artificial structures or umbrellas.
Shading using non-living materials blocks the sun, but also results in sunlight being absorbed and re-radiated as heat, or in sunlight being reflected as [[Light pollution#Glare|glare]]. Green plants, on the other hand, not only absorb a significant portion of the sunlight to invest as energy in [[photosynthesis]] to produce [[carbohydrate|sugar]], but also actively transpire, producing an additional cooling effect.
In gardening terms, there are various types of shade:
*Full sun - more than five hours of direct sun per day.
*Part shade - two to five hours of direct sun, or all-day dappled sun (sunlight shining through open trees).
*Full shade - less than two hours of direct sun per day.
[[Category:Light]]
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[[fr:Ombre (lumière)]]
[[simple:Shade]]