| About Desert | |
About DesertGeography è defined as a territorial area of desert where rain almost never does not exceed 250 mm allanno and arid soil è.The desert can ò be considered an ecosystem or biome. è a desert ecosystem that receives little rain. They have a reputation for having little life, but that depends on the type of desert; There is abundant life in many, the vegetation is adapted to the low humidity and fauna usually hide during the day to humidity to preserve. Listituzione of social groups in deserts è complicated and requires a major adaptation to extreme circumstances that prevail in their. Deserts are ù wide area IP of the surface of land: with pi ù 50 million square kilometers, occupying nearly a third of this. Of this total, 53 per cent correspond to warm deserts and 47% to cold deserts. The processes of erosion are important factors in the formation of the landscape of the desert. According to the type and degree of erosion caused by wind and solar radiation, the deserts are different types of soils: sandy desert è What are composed mainly of sand, which by action of the winds made the dunes, stony or Rocky è desert, one of which land is composed of rocks or pebbles (this type of deserts is often referred to with the Arabic word hamada). Deserts may contain valuable mineral deposits that were formed or arid manufacturing environment, have been exposed through erosion. In the low-lying areas pu ò form salt lakes. due to the siccit à of the desert, are ideal places for the preservation of fossils and human artifacts. It also defines wilderness as left, not inhabited by humans and not just from all living lessere. According to this definition, are also located in deserts those long cold dellArtide ù pi or the tundra. Most classifications è a combination of the number of days of rain allanno, annual precipitation default.Hoo à, temperature, dellumidit à and other factors. In 1953, Peveril Meigs divided desert regions of the Earth into three categories, according to the total amount of rain received. From this, now widely accepted system, extremely arid lands are those that have at least 12 consecutive months without rainfall, arid lands have pi ù of less than 250 mm of annual rainfall, and semiarid lands have a mean annual rainfall between 250 and 500 mm. The arid and extremely arid lands are deserts and semiarid land, covered with herbs, generally è called steppe. However, the siccit à from è does not provide an exact description of what a wilderness è. For example, the à city of Phoenix, Arizona receives less than 250 millimetres of rain allanno and è classified as desert course. However, some icy regions of Alaska or Antarctica also receive less than 250 millimetres of rain allanno, but the common perception do not è desert (deserts è actually cold or snowy deserts: their pi ù high life are very hard) (but the evapotranspiration and the possibility of finding fresh water à è significantly higher than in the classical notion that What è a desert). To pi ù specifically define a desert, it è hot or cold, one of the parameters that are used è the average yearly precipitation: less than 500 mm\/year represent a semi-arid area where there è much effort dellacqua (although pu ò mitigate if temperatures are low ()less than 15 . Another definition of ecological è a desert zone that è is equal to or less than 100 mm\/year of rain and without compensation of any other natural source of fresh water. Differences in verification tests reside in the phenomenon called evapotranspiration. Evapotranspiration è the combination of loss of water evaporation from the soil, atmospheric water along with the loss of water in the form of steam with the life processes of plants. The potential evapotranspiration, è, then à the amount of water that evaporates in a data region. The city of Tucson, Arizona à, receives about 300 mm annual rainfall, however, about 2,500 mm of water can evaporate in the period of one year. What è means that almost 8 times more water could evaporate ù in this region which falls normally. Evapotranspiration rates witness wildlife areas are considerably more ù; then, still receiving minimal precipitation, these regions far from the basic definition of a desert: a place where levaporazione exceeds the total amount of precipitation of rain. Consequently, there are different forms of desert areas. Cold deserts can be covered with snow; These seats do not receive lots of rain that falls as snow compact remains frozen. Desert boots, Cheap diamond ring, Desert boots, meteo 7 jours, http://vreme.edublogs.org | |