Alps
The Alps do not form an impassable barrier; they have been traversed for war and commerce, and later by pilgrims, students and tourists. Crossing places by road, train or foot are called passes. These are depressions in the mountains to which a valley leads from the plains and hilly pre-mountainous zones.
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Climate
The Alps are a classic example of what happens when a temperate area at lower altitude gives way to higher elevation terrain. Elevations around the world which have cold climates similar to those found in polar areas have been called alpine. A rise from sea level into the upper regions of the atmosphere causes the temperature to decrease. The effect of mountain chains on prevailing winds is to carry warm air belonging to the lower region into an upper zone, where it expands in volume at the cost of a proportionate loss of heat, often accompanied by the precipitation of moisture in the form of snow or rain.
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Geology
The Alps arose as a result of the pressure exerted on sediments of the Tethys Ocean basin as its Mesozoic and early Cenozoic strata were pushed against the stable Eurasian landmass by the northward-moving African landmass. Most of this occurred during the Oligocene and Miocene epochs. The pressure formed great recumbent folds, or nappes, that rose out of what had become the Tethys Sea and pushed northward, often breaking and sliding one over the other to form gigantic thrust faults. Crystalline rocks, which are exposed in the higher central regions, are the rocks forming Mont Blanc, the Matterhorn, and high peaks in the Pennine Alps and Hohe Tauern.
The landscape seen today is mostly formed by glaciation during the past two million years. At least five ice ages have done much to change the region, scooping out the lakes and rounding off the limestone hills along the northern border. Glaciers have been retreating during the past 10,000 years, leaving large granite erratics scattered in the forests in the region. As the last ice age ended, it is believed that the climate changed so rapidly that the glaciers retreated back into the mountains in a span of about 200 to 300 years.
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Population
The biggest city situated in the Alps, is Grenoble, France (metropolitan area about 500,000 inhabitants). French people call the city "The Capital City of Alps".
The second biggest city of the alpine arch, is Innsbruck, Austria.
In 2001, the total population of all the alpine area was about 12,295,000.
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Political and cultural history
Little is known of the early dwellers in the Alps, save from the scanty accounts preserved by Roman and Greek historians and geographers. A few details have come down to us of the conquest of many of the Alpine tribes by Augustus.
During the Second Punic War in 218 BC, The Carthaginian general Hannibal successfully crossed the alps along with an army numbering 38,000 infantry, 8,000 cavalry, and 37 war elephants.[1]. This was one of the most celebrated achievements of any military force in ancient warfare[citation needed].
Much of the Alpine region was gradually settled by Germanic tribes (Langobards, Alemanni, Bavarii) from the 6th to the 13th centuries, the latest expansion corresponding to the Walser migrations.
It is not until the final breakup of the Carolingian Empire in the 10th and 11th centuries that it becomes possible to trace out the local history of the Alps.
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Exploration
The higher regions of the Alps were long left to the exclusive attention of the people of the adjoining valleys, even when Alpine travellers (as distinguished from Alpine climbers) began to visit these valleys. The two men who first explored the regions of ice and snow were H.B. de Saussure (1740-1799) in the Pennine Alps, and the Benedictine monk of Disentis, Placidus a Spescha (1752-1833), most of whose ascents were made before 1806, in the valleys at the sources of the Rhine.
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Travel and Tourism
The Alps are popular both in summer and in winter as a destination for sightseeing and sports. Winter sports (alpine and Nordic skiing, tobogganing, snowshoeing, ski tours) can be practised in most regions from December to April, while in summer the Alps are popular with hikers, mountain bikers, paragliders, mountaineers, while many lakes attract swimmers, sailors and surfers. The lower regions and larger towns of the Alps are well accessed by motorways and main roads, but higher passes and by-roads can be treacherous even in summer. Many passes are closed in winter. A multitude of airports around the Alps (and some within), as well as long-distance rail links from all neighbouring countries, afford large numbers of travellers easy access from abroad.
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Flora
A natural vegetation limit with altitude is given by the presence of the chief deciduous trees—oak, beech, ash and sycamore maple. These do not reach exactly to the same elevation, nor are they often found growing together; but their upper limit corresponds accurately enough to the change from a temperate to a colder climate that is further proved by a change in the wild herbaceous vegetation. This limit usually lies about 1,200 metres (3,940 ft) above the sea on the north side of the Alps, but on the southern slopes it often rises to 1,500 metres (4,920 ft), sometimes even to 1,700 metres (5,580 ft).
This region is not always marked by the presence of the characteristic trees. Human interference has nearly exterminated them in many areas, and, except for the beech forests of the Austrian Alps, forests of deciduous trees are rarely found. In many districts where such woods once existed, they have been replaced by the Scots pine and Norway spruce, which are less sensitive to the ravages of goats who are the worst enemies of such trees.
Above the forestry, there is often a band of short pine trees (Pinus mugo), which is in turn superseded by dwarf shrubs, typically Rhododendron ferrugineum (on acid soils) or Rhododendron hirsutum (on basic soils). Above this is the alpine meadow, and even higher, the vegetation becomes more and more sparse. At these higher altitudes, the plants tend to form isolated cushions. In the Alps, several species of flowering plants have been recorded above 4,000 metres (13,120 ft), including Ranunculus glacialis, Androsace alpina and Saxifraga biflora.
_Pinus_mugo_mugo.jpg/90px-Kosodrzewina_(Sosna_górska)_Pinus_mugo_mugo.jpg) mountain pine |
 rusty-leaved Alpenrose |
 Edelweiss |
 stemless gentian |
 Alpine dwarf orchid |
 Alpine pasque-flower |
 Alpine rock-jasmine (Androsace alpina) |
 glacier buttercup |
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Fauna
Species common to the Alps. These are most numerous in the 15% of the Alps that are protected in parks and reserves.[citation needed]
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The Alps in popular culture
- There is a roller coaster in Busch Gardens Europe (Virginia, USA) called the Alpengeist.
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See also
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External links
- Satellite photo of the Alps, taken on August 31, 2005 by MODIS aboard Terra
- (Italian) Images from the Alps Many images from Alps, landscape, flowers and wildlife.
- 360° Panoramic Views in Alps
- A online picture collection of the Alps More than 2000 pictures of climbing, backcountry skiing, hiking, landscape
- Photos - Italian Alps - Santa Catarina
- (English) Photos of alpin swiss landscapes and wildlife (Valais)
- Discover wildlife of the Alps with 60 representative photos
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References
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