Swiss Mountains

The Alpine region of Switzerland, conventionally referred to as the Swiss Alps (german: Schweizer Alpen, french: Alpes suisses, it, Alpi svizzere, rm, Alps svizras), represents a major natural feature of the country and is, along with the Swiss Plateau and the Swiss portion of the Jura Mountains, one of its three main physiographic regions. The Swiss Alps extend over both the Western Alps and the Eastern Alps, encompassing an area sometimes called Central Alps. While the northern ranges from the Bernese Alps to the Appenzell Alps are entirely in Switzerland, the southern ranges from the Mont Blanc massif to the Bernina massif are shared with other countries such as France, Italy, Austria and Liechtenstein.

The Swiss Alps comprise almost all the highest mountains of the Alps, such as Dufourspitze (4,634 m), the Dom (4,545 m), the Liskamm (4,527 m), the Weisshorn (4,506 m) and the Matterhorn (4,478 m). The other following major summits can be found in this list of mountains of Switzerland.

Since the Middle Ages, transit across the Alps played an important role in history. The region north of St Gotthard Pass became the nucleus of the Swiss Confederacy in the early 14th century.

Geography

The Alps cover 60% of Switzerland's total surface area, making it one of the most ''alpine'' countries. Despite the fact that Switzerland covers only 14% of the Alps total area, 48 out of 82 alpine four-thousanders are located in the Swiss Alps and practically all of the remaining 34 are within of the country's border.

The glaciers of the Swiss Alps cover an area of — 3% of the Swiss territory, representing 44% of the total glaciated area in the Alps i.e. .

The Swiss Alps are situated south of the Swiss Plateau and north of the national border. The limit between the Alps and the plateau runs from Vevey on the shores of Lake Geneva to Rorschach on the shores of Lake Constance, passing close to the cities of Thun and Lucerne. The not well defined regions in Switzerland that lie on the margin of the Alps, especially those on the north side, are called the ''Swiss Prealps'' (''Préalpes'' in French, ''Voralpen'' in German, ''Prealpi'' in Italian). The Swiss Prealps are mainly made of limestone and they generally do not exceed .

The Alpine cantons (from highest to lowest) are Valais, Bern, Graubünden, Uri, Glarus, Ticino, St. Gallen, Vaud, Obwalden, Nidwalden, Schwyz, Appenzell Innerrhoden, Appenzell Ausserrhoden, Fribourg, Lucerne and Zug. The countries with which Switzerland shares mountain ranges of the Alps are (from west to east): France, Italy, Austria and Liechtenstein.

Ranges

The Alps are usually divided into two main parts, the Western Alps and Eastern Alps, whose division is along the Rhine from Lake Constance to the Splügen Pass. The western ranges occupy the greatest part of Switzerland while the more numerous eastern ranges are much smaller and are all situated in the canton of Graubünden. The latter is part of the Central Eastern Alps, except the Ortler Alps which belong to the Southern Limestone Alps. The Pennine, Bernese and Bernina Range are the highest ranges of the country, they contain respectively 38, 9 and 1 summit over 4000 meters. The lowest range is the Appenzell Alps culminating at 2,500 meters.

Western Alps

Eastern Alps

Hydrography

Rivers

The north side of the Swiss Alps is drained by the Rhône, Rhine and Inn (which is part of the Danube basin) while the south side is mainly drained by the Ticino (Po basin). The rivers on the north empty into the Mediterranean, North and Black Sea, on the south the Po empty in the Adriatic Sea. The major triple watersheds in the Alps are located within the country, they are: Piz Lunghin, Witenwasserenstock and Monte Forcola. Between the Witenwasserenstock and Piz Lunghin runs the European Watershed separating the basin of the Atlantic (the North Sea) and the Mediterranean Sea (Adriatic and the Black Sea). The European watershed lies only partially on the main chain. Switzerland possesses 6% of Europe's freshwater, and is sometimes referred to as the "water tower of Europe".

Lakes

Since the highest dams are located in Alpine regions, many large mountain lakes are artificial and are used as hydroelectric reservoirs. Some large artificial lakes can be found above 2,300 m, but natural lakes larger than 1 km² are generally below 1,000 m (with the exceptions of lakes in the Engadin such as Lake Sils, and Oeschinen in the Bernese Oberland). The melting of low-altitude glaciers can generate new lakes, such as the 0.25 km² large Triftsee which formed between 2002 and 2003.

Hydroelectricity Impacts due to Glacial Melting

Switzerland has been using this concerning transition in climate as a positive opportunity to develop new innovations and to change the ways that energy is being produced in the country. Switzerland depends on the use of hydroelectricity to power nearby communities, but as glaciers melt and stop refreezing, the melting that creates the energy ceases to exist. Researchers have been evaluating how the topography will change as the glaciers begin to decrease and they are looking more deeply into potential construction costs, energy production, and future problems they might encounter with these new developments. Switzerland is one of many countries that need to begin to think about the future of energy production in response to climate change. Switzerland is paving the way for a new wave of innovation and creative problem solving that the rest of the world will eventually need to follow.

Land elevation

The following table gives the surface area above 2000 m and 3000 m and the respective percentage on the total area of each canton whose high point is above 2000 metres.

Monitoring glacial changes over time

PERMOS (The Swiss Permafrost Monitoring Network) is an operational monitoring service, and its main goal is to create long-term scientific documentation of the permafrost changes in the Swiss Alps. To accurately represent the current conditions of the Alps, the network records permafrost temperatures and thermal changes in boreholes, the bottom temperature of the snow cover, ground surface temperature, and the development of snow cover. The network additionally takes air photos periodically from selected areas. These monitoring strategies continue to develop as new research and data are recorded over time. The glaciers in the Swiss Alps have lost around half their volume during the last 90–120 years.

Geology

The composition of the great tectonic units reflects the history of the formation of the Alps. The rocks from the Helvetic zone on the north and the Austroalpine nappes – Southern Alps on the south come originally from the European and African continent respectively. The rocks of the Penninic nappes belong to the former area of the Briançonnais microcontinent and the Tethys Ocean. The closure of the latter by subduction under the African plate ( Piemont Ocean first and Valais Ocean later) preceded the collision between the two plates and the so-called alpine orogeny. The major thrust fault of the Tectonic Arena Sardona in the eastern Glarus Alps gives a visible illustration of mountain-building processes and was therefore declared a UNESCO World Heritage. Another fine example gives the Alpstein area with several visible upfolds of Helvetic zone material.

With some exceptions, the Alps north of Rhône and Rhine are part of the Helvetic Zone and those on the south side are part of the Penninic nappes. The Austroalpine zone concerns almost only the Eastern Alps, with the notable exception of the Matterhorn.

The last glaciations greatly transformed Switzerland's landscape. Many valleys of the Swiss Alps are U-shaped due to glacial erosion. During the maximum extension of the Würm glaciation (18,000 years ago) the glaciers completely covered the Swiss Plateau, before retreating and leaving remnants only in high mountain areas. In modern times the Aletsch Glacier in the western Bernese Alps is the largest and longest in the Alps, reaching a maximum depth of 900 meters at Konkordiaplatz. Along with the Fiescher and Aar Glaciers, the region became a UNESCO World Heritage Site in 2001. An effect of the retreat of the Rhine Glacier some 10,000 years ago was the Flims Rockslide, the biggest still visible landslide worldwide.

Environment and climate

To protect endangered species some sites have been brought under protection. The Swiss National Park in Graubünden was established in 1914 as the first alpine national park. The Entlebuch area was designated a biosphere reserve in 2001. The largest protected area in the country is the Parc Ela, opened in 2006, which covers an area of 600 square kilometres. The Jungfrau-Aletsch Protected Area is the first World Heritage Site in the Alps.

Climate zones

As the temperature decreases with altitude (0.56 °C per 100 meters on yearly average), three different altitudinal zones, each having distinct climate, are found in the Swiss Alps:

*Subalpine zone


The Subalpine zone is the region that lies below the tree line. It is the most important region as it is the largest of the three and contains almost all human settlements as well as the productive areas. The forests are mainly composed of conifers above 1,200–1,400 meters, the deciduous tree forest is confined to lower elevations. The upper limit of the Subalpine zone is located at about 1,800 meters on the north side of the Alps and about 2,000 meters on the south side. It can, however, differ in some regions such as the Appenzell Alps (1,600 meters) or the Engadin valley (2,300 meters).

*Alpine zone
The Alpine zone is situated above the tree line and is clear of trees because of low average temperatures. It contains mostly grass and small plants along with mountain flowers. Below the permafrost limit (at about 2,600 meters), the alpine meadows are often used as pastures. Some villages can still be found on the lowest altitudes such as Riederalp