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Where are the mountains?Posted: 17 Nov 2003
Anyone who looks at or walks up a mountain knows what it is, but only recently has it been possible to come up with a precise figure for the proportion of the Earth's land surface covered by mountains: 24 per cent.
This was made possible by using a global database which records the average altitude of every square kilometre of the Earth's land surface, and defining rules relating to altitude, slope and local relief. The distribution of mountains in different elevation classes in different parts of the world is shown in the chart provided by the World Conservation Monitoring Centre's Mountain Programme.
Maps of the mountains in different parts of the world may be obtained by clicking here.
The highest mountain on our planet, measured from its base 4,931 m below the sea surface, is Mauna Loa, Hawaii's tallest mountain, which rises to 4,169 m above sea level.
Mauna Kea, Hawaii
� L.S. Hamilton
However, it is more usual to measure mountains from sea level. Climbing the highest mountain above sea level on every continent - the "Seven Summits" - has become a challenge for many keen mountaineers. The highest mountains are:
Another mountaineering challenge is to climb all the peaks over 8,000 m, which are all in Asia's Hindu Kush-Himalaya, which contains 66 peaks above 7,000 m.
- Of the world's current roster of 185 countries, only 46 have no mountains or high plateaux - and most of those are small island nations.
- The longest north-south mountain system in the world is formed by the cordilleras of the New World, forming a major barrier stretching from the Antarctic far into the Arctic. The South American Andes alone are 7,250 km in length.
- The Himalaya form an arc 3.4 million square kilometres in area and more than 2,500 km long, merging into the Hengduan to the east and the Karakorum and Hindu Kush to the west. In total, the ranges and plateaux of mainland Asia are nearly 8,000 km long.
- The Alps have an area of 240,000 square kilometres. They are 1,000 km long and from 130 to 250 km wide. They are the only mountain range defined by an international convention (the Alpine Convention)
- The Sierra Nevada, are the longest (640 km) and highest (Mt. Whitney, 4,418 m) unbroken range in the continental USA.
P.B. Stone (editor) (1992)
The State of the World's Mountains, Zed Books, London,
H. Gurung (1999) Mountains of Asia: A Regional Inventory, International Centre for Integrated Mountain Development, Katmandu.
Compiled by Dr Martin Price, Director of the Centre for Mountain Studies at Perth College, within Scotland's UHI Millennium Institute, 'creating the University of the Highlands and Islands', with co-operation from Development and Environment Info Service, a mandate of Swiss Agency of Development Co-operation (SDC).