Dendrochronology and Late Holocene History of Bering Piedmont Glacier, Alaska
Fluctuations of the piedmont lobe of Bering Glacier and its sublobe Steller Glacier over the past two millennia are reconstructed using 34 radiocarbon dates and tree-ring data from 16 sites across the glaciers' forelands. The general sequence of glacial activity is consistent with well-dated fl...
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Cambridge University Press (CUP)
1999
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crcambridgeupr:10.1006/qres.1999.2054 2024-09-15T18:07:33+00:00 Dendrochronology and Late Holocene History of Bering Piedmont Glacier, Alaska Wiles, Gregory C. Post, Austin Muller, Ernest H. Molnia, Bruce F. 1999 http://dx.doi.org/10.1006/qres.1999.2054 http://api.elsevier.com/content/article/PII:S0033589499920549?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589499920549?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400025771 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 52, issue 2, page 185-195 ISSN 0033-5894 1096-0287 journal-article 1999 crcambridgeupr https://doi.org/10.1006/qres.1999.2054 2024-07-24T04:01:47Z Fluctuations of the piedmont lobe of Bering Glacier and its sublobe Steller Glacier over the past two millennia are reconstructed using 34 radiocarbon dates and tree-ring data from 16 sites across the glaciers' forelands. The general sequence of glacial activity is consistent with well-dated fluctuations of tidewater and land-terminating glaciers elsewhere along the Gulf of Alaska. Extensive forested areas along 25 km of the Bering ice margin were inundated by glacio-lacustrine and glacio-fluvial sediments during a probable ice advance shortly before 500 cal yr A.D. Regrowth of forests followed the retreating ice as early as the 7th century A.D., with frequent interruptions of tree growth due to outwash aggradation. Forests overrun by ice and buried in outwash indicate readvance about 1080 cal yr A.D. Retreat followed, with ice-free conditions maintained along the distal portions of the forefield until the early 17th century after which the ice advanced to within a few kilometers of its outer Neoglacial moraine. Ice reached this position after the mid-17th century and prior to 200 yr ago. Since the early 20th century, glacial retreat has been punctuated by periodic surges. The record from forests overrun by the nonsurging Steller Lobe shows that this western ice margin was advancing by 1250 A.D., reaching near its outer moraine after 1420 cal yr A.D. Since the late 19th century, the lobe has dominantly retreated. Article in Journal/Newspaper glacier glaciers Tidewater Alaska Cambridge University Press Quaternary Research 52 2 185 195 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Fluctuations of the piedmont lobe of Bering Glacier and its sublobe Steller Glacier over the past two millennia are reconstructed using 34 radiocarbon dates and tree-ring data from 16 sites across the glaciers' forelands. The general sequence of glacial activity is consistent with well-dated fluctuations of tidewater and land-terminating glaciers elsewhere along the Gulf of Alaska. Extensive forested areas along 25 km of the Bering ice margin were inundated by glacio-lacustrine and glacio-fluvial sediments during a probable ice advance shortly before 500 cal yr A.D. Regrowth of forests followed the retreating ice as early as the 7th century A.D., with frequent interruptions of tree growth due to outwash aggradation. Forests overrun by ice and buried in outwash indicate readvance about 1080 cal yr A.D. Retreat followed, with ice-free conditions maintained along the distal portions of the forefield until the early 17th century after which the ice advanced to within a few kilometers of its outer Neoglacial moraine. Ice reached this position after the mid-17th century and prior to 200 yr ago. Since the early 20th century, glacial retreat has been punctuated by periodic surges. The record from forests overrun by the nonsurging Steller Lobe shows that this western ice margin was advancing by 1250 A.D., reaching near its outer moraine after 1420 cal yr A.D. Since the late 19th century, the lobe has dominantly retreated. |
format |
Article in Journal/Newspaper |
author |
Wiles, Gregory C. Post, Austin Muller, Ernest H. Molnia, Bruce F. |
spellingShingle |
Wiles, Gregory C. Post, Austin Muller, Ernest H. Molnia, Bruce F. Dendrochronology and Late Holocene History of Bering Piedmont Glacier, Alaska |
author_facet |
Wiles, Gregory C. Post, Austin Muller, Ernest H. Molnia, Bruce F. |
author_sort |
Wiles, Gregory C. |
title |
Dendrochronology and Late Holocene History of Bering Piedmont Glacier, Alaska |
title_short |
Dendrochronology and Late Holocene History of Bering Piedmont Glacier, Alaska |
title_full |
Dendrochronology and Late Holocene History of Bering Piedmont Glacier, Alaska |
title_fullStr |
Dendrochronology and Late Holocene History of Bering Piedmont Glacier, Alaska |
title_full_unstemmed |
Dendrochronology and Late Holocene History of Bering Piedmont Glacier, Alaska |
title_sort |
dendrochronology and late holocene history of bering piedmont glacier, alaska |
publisher |
Cambridge University Press (CUP) |
publishDate |
1999 |
url |
http://dx.doi.org/10.1006/qres.1999.2054 http://api.elsevier.com/content/article/PII:S0033589499920549?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589499920549?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400025771 |
genre |
glacier glaciers Tidewater Alaska |
genre_facet |
glacier glaciers Tidewater Alaska |
op_source |
Quaternary Research volume 52, issue 2, page 185-195 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1006/qres.1999.2054 |
container_title |
Quaternary Research |
container_volume |
52 |
container_issue |
2 |
container_start_page |
185 |
op_container_end_page |
195 |
_version_ |
1810444929488388096 |