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The north facing slopes receive more snow often because of prevailing winds and are shaded from direct sunlight during the winter, consequently they have more water available to support trees and forests, while the south facing slopes which receive more insolation are much hotter and dryer and support only smaller more desert adapted woody ...
In the Northern Hemisphere the snow line on the north-facing slopes is at a lower elevation, as the north-facing slopes receive less sunlight (solar irradiance) than south-facing slopes. [3] The converse will occur in the Southern Hemisphere.
Treelines on north-facing slopes in the northern hemisphere are lower than on south-facing slopes, because the increased shade on north-facing slopes means the snowpack takes longer to melt. This shortens the growing season for trees. [16]: 109 In the southern hemisphere, the south-facing slopes have the shorter growing season.
Tankerton Slopes is a 2.3-hectare (5.7-acre) biological Site of Special Scientific Interest in Whitstable in Kent. [1] [2] It is part of the Tankerton Slopes and Swalecliffe Special Area of Conservation [3] This north facing slope has a population of tall herbs, including the largest population in Britain of hog’s fennel, a nationally rare ...
Slopes are rolling to very steep. Elevation varies from 1,600 to 4,400 feet (490 to 1,340 m). The hills and uplands are covered with Idaho fescue, bluebunch wheatgrass, and Sandberg bluegrass. Near the Blue Mountains, some north-facing slopes have Douglas-fir and ponderosa pine, with snowberry, pinegrass, and ninebark.
Most of the precipitation falls as winter snow. The area experiences several feet of snow each year with snowfields lasting till early June on the north facing slopes. In heavy snowfall years snowfields can last till late July or later. Temperatures fall to near freezing most days but can drop well into the single digits in the coldest months.
Montane vegetation belt, 900- 1,000 m to 1,600 m (northern slopes) and 1,300 to 1,800 m (southern slopes); forests of Pinus nigra ssp. laricio, Fagus sylvatica and Abies alba. Quercus ilex, Quercus pubescens, Pinus pinaster, Castanea sativa and Erica arborea not present anymore.
The south-facing slopes are mostly covered in Chaparral shrubland, grasslands, and oak savanna. The north-facing slopes are home to magnificent oak woodlands and conifer (fir) woodlands, some of which have been protected in the Santa Clarita Woodlands Park and other large open space preserves.