The glacial geomorphology of the western cordilleran ice sheet and Ahklun ice cap, Southern Alaska
During the late Wisconsinan, Southern Alaska was covered by two large ice masses; the western arm of the Cordilleran Ice Sheet and the Ahklun Mountains Ice Cap. Compared to the other ice sheets that existed during this period (e.g. the British-Irish, Laurentide and Fennoscandian ice sheets), little...
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ftdatacite:10.6084/m9.figshare.3968979 2023-05-15T16:13:01+02:00 The glacial geomorphology of the western cordilleran ice sheet and Ahklun ice cap, Southern Alaska Ely, Jeremy C. Gribble, Emily A. Clark, Chris D. 2016 https://dx.doi.org/10.6084/m9.figshare.3968979 https://tandf.figshare.com/articles/journal_contribution/The_glacial_geomorphology_of_the_western_cordilleran_ice_sheet_and_Ahklun_ice_cap_Southern_Alaska/3968979 unknown Taylor & Francis https://dx.doi.org/10.1080/17445647.2016.1234981 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Medicine Neuroscience 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 20199 Astronomical and Space Sciences not elsewhere classified FOS Physical sciences Sociology FOS Sociology 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences Plant Biology Text article-journal Journal contribution ScholarlyArticle 2016 ftdatacite https://doi.org/10.6084/m9.figshare.3968979 https://doi.org/10.1080/17445647.2016.1234981 2021-11-05T12:55:41Z During the late Wisconsinan, Southern Alaska was covered by two large ice masses; the western arm of the Cordilleran Ice Sheet and the Ahklun Mountains Ice Cap. Compared to the other ice sheets that existed during this period (e.g. the British-Irish, Laurentide and Fennoscandian ice sheets), little is known about the geomorphology they left behind. This limits our understanding of their flow pattern and retreat. Here we present systematic mapping of the glacial geomorphology of the two ice masses which existed in Southern Alaska. Due to spatially variable data availability, mapping was conducted using digital elevation models and satellite images of varying resolutions. Offshore, we map the glacial geomorphology using available bathymetric data. For the first time, we document >5000 subglacial lineations, recording ice flow direction. The distribution of moraines is presented, as well as features related to glacial meltwater drainage patterns (eskers and meltwater channels). Prominent troughs were also mapped on Alaska's continental shelf. This map provides the data required for a glacial inversion of these palaeo-ice masses. Text Fennoscandian Ice Sheet Alaska DataCite Metadata Store (German National Library of Science and Technology) Western Arm ENVELOPE(-55.948,-55.948,49.683,49.683) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Medicine Neuroscience 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 20199 Astronomical and Space Sciences not elsewhere classified FOS Physical sciences Sociology FOS Sociology 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences Plant Biology |
spellingShingle |
Medicine Neuroscience 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 20199 Astronomical and Space Sciences not elsewhere classified FOS Physical sciences Sociology FOS Sociology 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences Plant Biology Ely, Jeremy C. Gribble, Emily A. Clark, Chris D. The glacial geomorphology of the western cordilleran ice sheet and Ahklun ice cap, Southern Alaska |
topic_facet |
Medicine Neuroscience 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology FOS Biological sciences 20199 Astronomical and Space Sciences not elsewhere classified FOS Physical sciences Sociology FOS Sociology 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences Plant Biology |
description |
During the late Wisconsinan, Southern Alaska was covered by two large ice masses; the western arm of the Cordilleran Ice Sheet and the Ahklun Mountains Ice Cap. Compared to the other ice sheets that existed during this period (e.g. the British-Irish, Laurentide and Fennoscandian ice sheets), little is known about the geomorphology they left behind. This limits our understanding of their flow pattern and retreat. Here we present systematic mapping of the glacial geomorphology of the two ice masses which existed in Southern Alaska. Due to spatially variable data availability, mapping was conducted using digital elevation models and satellite images of varying resolutions. Offshore, we map the glacial geomorphology using available bathymetric data. For the first time, we document >5000 subglacial lineations, recording ice flow direction. The distribution of moraines is presented, as well as features related to glacial meltwater drainage patterns (eskers and meltwater channels). Prominent troughs were also mapped on Alaska's continental shelf. This map provides the data required for a glacial inversion of these palaeo-ice masses. |
format |
Text |
author |
Ely, Jeremy C. Gribble, Emily A. Clark, Chris D. |
author_facet |
Ely, Jeremy C. Gribble, Emily A. Clark, Chris D. |
author_sort |
Ely, Jeremy C. |
title |
The glacial geomorphology of the western cordilleran ice sheet and Ahklun ice cap, Southern Alaska |
title_short |
The glacial geomorphology of the western cordilleran ice sheet and Ahklun ice cap, Southern Alaska |
title_full |
The glacial geomorphology of the western cordilleran ice sheet and Ahklun ice cap, Southern Alaska |
title_fullStr |
The glacial geomorphology of the western cordilleran ice sheet and Ahklun ice cap, Southern Alaska |
title_full_unstemmed |
The glacial geomorphology of the western cordilleran ice sheet and Ahklun ice cap, Southern Alaska |
title_sort |
glacial geomorphology of the western cordilleran ice sheet and ahklun ice cap, southern alaska |
publisher |
Taylor & Francis |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.3968979 https://tandf.figshare.com/articles/journal_contribution/The_glacial_geomorphology_of_the_western_cordilleran_ice_sheet_and_Ahklun_ice_cap_Southern_Alaska/3968979 |
long_lat |
ENVELOPE(-55.948,-55.948,49.683,49.683) |
geographic |
Western Arm |
geographic_facet |
Western Arm |
genre |
Fennoscandian Ice Sheet Alaska |
genre_facet |
Fennoscandian Ice Sheet Alaska |
op_relation |
https://dx.doi.org/10.1080/17445647.2016.1234981 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.3968979 https://doi.org/10.1080/17445647.2016.1234981 |
_version_ |
1765998621665263616 |