- Taku Glacier
Infobox_Glacier | glacier_name = Taku Glacier
caption = Taku Glacier
type = Tidewater glacier
location =City and Borough of Juneau, Alaska , USA
coordinates = coord|58|26|57|N|134|04|42|W|type:glacier
area = 261 square miles (428 square kilometers)
length = 57 miles (92 km)
thickness =
terminus =Taku River
status = AdvancingTaku Glacier is a
tidewater glacier located inTaku Inlet in theU.S. state ofAlaska , just southeast of the city of Juneau.The glacier was originally named Schultze Glacier in
1883 and the Foster Glacier in1890 , but "Taku", the name the localTlingit natives had for the glacier, eventually stuck. It is nestled in theCoast Mountains and originates in theJuneau Icefield . It is the largest glacier in the icefield and one of the southernmost tidewater glaciers of the northern hemisphere.The glacier, which converges with the
Taku River at Taku Inlet, has a history of advancing until it blocks the river, creating a lake, followed by a dramatic break of theice dam . The most recent of these advances occurred in 1750. The glacier has advanced 7.5 kilometers since 1890, and is 1.5 kilometers from Taku Point. It is the only advancing glacier of the 20 major glaciers of the Juneau Icefield [Nichols College : [http://www.nichols.edu/departments/Glacier/juneau%20icefield.htm "Terminus behavior of Juneau Icefield glaciers, 1948-2005.] ] . If the advance continues it would block the river again—this may happen again-but at the moment is unlikely. Since 1946, the glacier has been observed annually by the Juneau Icefield Research Program, which has documented its rate of advance since 1988 at 17 meters a year. The advance is due to a positive mass balance; that is, more snow accumulation than snow and ice melt. Until 1948 the glacier had a calving front; since then the terminus has been groundedDue to the positive mass balance and the fact that it was no longer losing mass to
iceberg s, Taku Glacier has become insensitive to the warming that has impacted all other glaciers of the icefield. This has driven its advance. The recent negative mass balance 1989-2005 is not large enough to stop the advance yet, but is the first sign that the glacier's advance may not make it to Taku Point.Taku Glacier is the namesake of the
Alaska Marine Highway System ferry M/V "Taku".ee also
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List of glaciers References
External links
* [http://www.nichols.edu/departments/Glacier/juneau%20icefield.htm Terminus Behvaior of Juneau Icefield Glaciers 1948-2005]
* [http://www.nichols.edu/departments/Glacier/tasku.html Mass balance of the Taku Glacier 1946-2005]
* [http://www.jirp.org Juneau Icefield Research Program]
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* [http://glacierbliss.com/ Pictures from the Juneau Icefield, including some from the Taku Glacier]
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