Little Ice Age subsidence and post Little Ice Age uplift at Juneau, Alaska, inferred from dendrochronology and geomorphology
Abstract Application of dendrochronology and geomorphology to a recently emerged coastal area near Juneau, Alaska, has documented a Little Ice Age (LIA) sea-level transgression to 6.2 m above current sea level. The rise in relative sea level is attributed to regional subsidence and appears to have s...
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Cambridge University Press (CUP)
2003
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crcambridgeupr:10.1016/s0033-5894(03)00032-2 2024-09-15T18:07:33+00:00 Little Ice Age subsidence and post Little Ice Age uplift at Juneau, Alaska, inferred from dendrochronology and geomorphology Motyka, Roman J. 2003 http://dx.doi.org/10.1016/s0033-5894(03)00032-2 http://api.elsevier.com/content/article/PII:S0033589403000322?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589403000322?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400011996 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 59, issue 3, page 300-309 ISSN 0033-5894 1096-0287 journal-article 2003 crcambridgeupr https://doi.org/10.1016/s0033-5894(03)00032-2 2024-07-24T04:03:41Z Abstract Application of dendrochronology and geomorphology to a recently emerged coastal area near Juneau, Alaska, has documented a Little Ice Age (LIA) sea-level transgression to 6.2 m above current sea level. The rise in relative sea level is attributed to regional subsidence and appears to have stabilized by the mid 16th century, based on a sea-cliff eroded into late-Pleistocene glaciomarine sediments. Land began emerging between A.D. 1770 and 1790, coincident with retreat of regional glaciers from their LIA maximums. This emergence has continued since then, paralleling regional glacier retreat. Total Juneau uplift since the late 18th century is estimated to be 3.2 m. The rate of downward colonization of newly emergent coastline by Sitka spruce during the 20th century closely parallels the rate of sea-level fall documented by analysis of local tide-gauge records (1.3 cm/yr). Regional and Glacier Bay LIA loading and unloading are inferred to be the primary mechanisms driving subsidence and uplift in the Juneau area. Climate change rather then regional tectonics has forced relative sea-level change over the last several hundred years. Article in Journal/Newspaper glacier glaciers Alaska Cambridge University Press Quaternary Research 59 3 300 309 |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Application of dendrochronology and geomorphology to a recently emerged coastal area near Juneau, Alaska, has documented a Little Ice Age (LIA) sea-level transgression to 6.2 m above current sea level. The rise in relative sea level is attributed to regional subsidence and appears to have stabilized by the mid 16th century, based on a sea-cliff eroded into late-Pleistocene glaciomarine sediments. Land began emerging between A.D. 1770 and 1790, coincident with retreat of regional glaciers from their LIA maximums. This emergence has continued since then, paralleling regional glacier retreat. Total Juneau uplift since the late 18th century is estimated to be 3.2 m. The rate of downward colonization of newly emergent coastline by Sitka spruce during the 20th century closely parallels the rate of sea-level fall documented by analysis of local tide-gauge records (1.3 cm/yr). Regional and Glacier Bay LIA loading and unloading are inferred to be the primary mechanisms driving subsidence and uplift in the Juneau area. Climate change rather then regional tectonics has forced relative sea-level change over the last several hundred years. |
format |
Article in Journal/Newspaper |
author |
Motyka, Roman J. |
spellingShingle |
Motyka, Roman J. Little Ice Age subsidence and post Little Ice Age uplift at Juneau, Alaska, inferred from dendrochronology and geomorphology |
author_facet |
Motyka, Roman J. |
author_sort |
Motyka, Roman J. |
title |
Little Ice Age subsidence and post Little Ice Age uplift at Juneau, Alaska, inferred from dendrochronology and geomorphology |
title_short |
Little Ice Age subsidence and post Little Ice Age uplift at Juneau, Alaska, inferred from dendrochronology and geomorphology |
title_full |
Little Ice Age subsidence and post Little Ice Age uplift at Juneau, Alaska, inferred from dendrochronology and geomorphology |
title_fullStr |
Little Ice Age subsidence and post Little Ice Age uplift at Juneau, Alaska, inferred from dendrochronology and geomorphology |
title_full_unstemmed |
Little Ice Age subsidence and post Little Ice Age uplift at Juneau, Alaska, inferred from dendrochronology and geomorphology |
title_sort |
little ice age subsidence and post little ice age uplift at juneau, alaska, inferred from dendrochronology and geomorphology |
publisher |
Cambridge University Press (CUP) |
publishDate |
2003 |
url |
http://dx.doi.org/10.1016/s0033-5894(03)00032-2 http://api.elsevier.com/content/article/PII:S0033589403000322?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589403000322?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400011996 |
genre |
glacier glaciers Alaska |
genre_facet |
glacier glaciers Alaska |
op_source |
Quaternary Research volume 59, issue 3, page 300-309 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/s0033-5894(03)00032-2 |
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Quaternary Research |
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59 |
container_issue |
3 |
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300 |
op_container_end_page |
309 |
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1810444934856048640 |