‘Little Ice Age’ glacier fluctuations, Gran Campo Nevado, southernmost Chile
Identifieur interne : 001703 ( Main/Exploration ); précédent : 001702; suivant : 001704‘Little Ice Age’ glacier fluctuations, Gran Campo Nevado, southernmost Chile
Auteurs : Johannes Koch [Canada] ; Rolf Kilian [Allemagne]Source :
- The Holocene [ 0959-6836 ] ; 2005-01.
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- Pascal (Inist)
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English descriptors
- KwdEn :
Abstract
Moraine systems of Glaciar Lengua (unofficial name) and neighbouring glaciers of Gran Campo Nevado (53°S) in the southernmost Andes were mapped and dated by dendrochronological means. They were formed around AD 1628, 1872/1875, 1886, 1902, 1912 and 1941 with the advance in the 1870s being calendar dated. Recessional moraines within each moraine system correspond to brief standstills or minor readvances. A significantly older moraine could not be directly dated by dendrochronological methods as the forest on it was assumed to be second-generation or older. From soil-formation rates, it is assumed that this moraine was formed at some time between AD 1280 and 1460, a time in which many other glaciers in Patagonia formed moraines. Overall, fluctuations of Glaciar Lengua show a strong synchronicity to other glaciers in the Patagonian Andes between 41°S and 55°S. This study suggests that Glaciar Lengua and possibly all glaciers of Gran Campo Nevado reached their Holocene maximum during the‘Little Ice Age.’
Url:
DOI: 10.1191/0959683605hl780rp
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="en">Moraine systems of Glaciar Lengua (unofficial name) and neighbouring glaciers of Gran Campo Nevado (53°S) in the southernmost Andes were mapped and dated by dendrochronological means. They were formed around AD 1628, 1872/1875, 1886, 1902, 1912 and 1941 with the advance in the 1870s being calendar dated. Recessional moraines within each moraine system correspond to brief standstills or minor readvances. A significantly older moraine could not be directly dated by dendrochronological methods as the forest on it was assumed to be second-generation or older. From soil-formation rates, it is assumed that this moraine was formed at some time between AD 1280 and 1460, a time in which many other glaciers in Patagonia formed moraines. Overall, fluctuations of Glaciar Lengua show a strong synchronicity to other glaciers in the Patagonian Andes between 41°S and 55°S. This study suggests that Glaciar Lengua and possibly all glaciers of Gran Campo Nevado reached their Holocene maximum during the‘Little Ice Age.’</div>
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