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The Bolam Glacier is a glacier situated on the northern flank of Mount Shasta, in the U.S. state of California.[1][2] It is the second longest glacier in California behind the nearby Whitney Glacier, and the fourth largest and most voluminous after the neighboring Hotlum Glacier, Whitney Glacier, and Wintun Glacier. [3]. The Bolam Glacier flows from a cirque on the north side of Mount Shasta's main summit, with the moving ice starting below a large bergschrund which spans the glacier at 12,600 ft (3,840 m)[4]. Above that, permanent snow and ice extends towards the summit to about 13,500 ft (4,100 m)[4]. The glacier flows north down a steep slope and terminates near 9,800 ft (3,000 m)[4].
In 2002, scientists made the first detailed survey of Mount Shasta's glaciers in 50 years. They found that seven of the glaciers have grown over the period 1951-2002, with the Hotlum and Wintun nearly doubling, the Bolam increasing by half, and the Whitney and Konwakiton Glaciers growing by a third.[5] [6] [7]
[edit] Cited references
- ^ Existing Glaciers of Mount Shasta. College of the Siskiyous. Retrieved on 2007-01-23.
- ^ Glaciers of California. Glaciers of the American West. Glaciers Online. Retrieved on 2007-01-23.
- ^ Driedger, Carolyn L.; Kennard, Paul M. (1986). Ice volumes on Cascade volcanoes; Mount Rainier, Mount Hood, Three Sisters, and Mount Shasta. U.S. Geological Survey Professional Paper 1365. Retrieved on 2007-03-06.
- ^ a b c Google Earth elevation for GNIS coordinates.
- ^ Harris, Stephen L. (2005). Fire Mountains of the West: The Cascade and Mono Lake Volcanoes (3rd ed.). Mountain Press Publishing Company, p. 109. ISBN 0-87842-511-X.
- ^ Wong, Kathleen. California Glaciers. California Wild. California Academy of Sciences. Retrieved on 2007-01-23.
- ^ Whitney, David. "A growing glacier: Mount Shasta bucks global trend, and researchers cite warming phenomena", The Bee, September 4, 2006. Retrieved on 2007-01-23.
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