Thermokarst Lakes on the Arctic Coastal Plain of Alaska: Geomorphic Controls on Bathymetry
ABSTRACT Detailed bathymetric data were collected for 28 thermokarst lakes across the Arctic Coastal Plain (ACP) of northern Alaska from areas with distinctly different surficial sediments and topography. Lakes found in the low‐relief coastal area have developed in marine silts that are ice‐rich in...
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crwiley:10.1002/ppp.1744 2024-10-20T14:06:39+00:00 Thermokarst Lakes on the Arctic Coastal Plain of Alaska: Geomorphic Controls on Bathymetry Hinkel, Kenneth M. Sheng, Yongwei Lenters, John D. Lyons, Evan A. Beck, Richard A. Eisner, Wendy R. Wang, Jida 2012 http://dx.doi.org/10.1002/ppp.1744 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.1744 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.1744 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 23, issue 3, page 218-230 ISSN 1045-6740 1099-1530 journal-article 2012 crwiley https://doi.org/10.1002/ppp.1744 2024-09-23T04:37:34Z ABSTRACT Detailed bathymetric data were collected for 28 thermokarst lakes across the Arctic Coastal Plain (ACP) of northern Alaska from areas with distinctly different surficial sediments and topography. Lakes found in the low‐relief coastal area have developed in marine silts that are ice‐rich in the upper 6–10 m. The lakes tend to be shallow (~ 2 m), of uniform depth and lack prominent littoral shelves. Further inland on the ACP, lakes have formed in relatively ice‐poor aeolian sand deposits. In this hilly terrain, average lake depth is less (~ 1 m) despite deeper (3–5 m) central pools. This bathymetry reflects the influence of broad, shallow littoral shelves where sand, eroded from bluffs at the lake margin, is deposited concurrently with deep penetration of the talik beneath the basin centre. Lakes in the ACP‐Arctic Foothills transition zone to the south have developed in loess uplands. These yedoma deposits are extremely ice‐rich, and residual lakes found inside old lake basins (alases) are generally 2–4 m deep, reflecting continued talik development and ground subsidence following drainage of the original lake. However, where the expanding lake encroaches on the flanks of the upland at actively eroding bluffs, near‐shore pools develop that can be 6–9 m deep. It appears that thawing of ice‐rich permafrost during lake expansion causes ground subsidence and formation of deep pools above ablating ice wedges. These data suggest that thermokarst lake morphometry largely depends on the characteristics of the substrate beneath the lake and the availability of sediments eroded at the lake margin. Copyright © 2012 John Wiley & Sons, Ltd. Article in Journal/Newspaper Arctic Ice permafrost Permafrost and Periglacial Processes Thermokarst wedge* Alaska Wiley Online Library Arctic Talik ENVELOPE(146.601,146.601,59.667,59.667) Permafrost and Periglacial Processes 23 3 218 230 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
ABSTRACT Detailed bathymetric data were collected for 28 thermokarst lakes across the Arctic Coastal Plain (ACP) of northern Alaska from areas with distinctly different surficial sediments and topography. Lakes found in the low‐relief coastal area have developed in marine silts that are ice‐rich in the upper 6–10 m. The lakes tend to be shallow (~ 2 m), of uniform depth and lack prominent littoral shelves. Further inland on the ACP, lakes have formed in relatively ice‐poor aeolian sand deposits. In this hilly terrain, average lake depth is less (~ 1 m) despite deeper (3–5 m) central pools. This bathymetry reflects the influence of broad, shallow littoral shelves where sand, eroded from bluffs at the lake margin, is deposited concurrently with deep penetration of the talik beneath the basin centre. Lakes in the ACP‐Arctic Foothills transition zone to the south have developed in loess uplands. These yedoma deposits are extremely ice‐rich, and residual lakes found inside old lake basins (alases) are generally 2–4 m deep, reflecting continued talik development and ground subsidence following drainage of the original lake. However, where the expanding lake encroaches on the flanks of the upland at actively eroding bluffs, near‐shore pools develop that can be 6–9 m deep. It appears that thawing of ice‐rich permafrost during lake expansion causes ground subsidence and formation of deep pools above ablating ice wedges. These data suggest that thermokarst lake morphometry largely depends on the characteristics of the substrate beneath the lake and the availability of sediments eroded at the lake margin. Copyright © 2012 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Hinkel, Kenneth M. Sheng, Yongwei Lenters, John D. Lyons, Evan A. Beck, Richard A. Eisner, Wendy R. Wang, Jida |
spellingShingle |
Hinkel, Kenneth M. Sheng, Yongwei Lenters, John D. Lyons, Evan A. Beck, Richard A. Eisner, Wendy R. Wang, Jida Thermokarst Lakes on the Arctic Coastal Plain of Alaska: Geomorphic Controls on Bathymetry |
author_facet |
Hinkel, Kenneth M. Sheng, Yongwei Lenters, John D. Lyons, Evan A. Beck, Richard A. Eisner, Wendy R. Wang, Jida |
author_sort |
Hinkel, Kenneth M. |
title |
Thermokarst Lakes on the Arctic Coastal Plain of Alaska: Geomorphic Controls on Bathymetry |
title_short |
Thermokarst Lakes on the Arctic Coastal Plain of Alaska: Geomorphic Controls on Bathymetry |
title_full |
Thermokarst Lakes on the Arctic Coastal Plain of Alaska: Geomorphic Controls on Bathymetry |
title_fullStr |
Thermokarst Lakes on the Arctic Coastal Plain of Alaska: Geomorphic Controls on Bathymetry |
title_full_unstemmed |
Thermokarst Lakes on the Arctic Coastal Plain of Alaska: Geomorphic Controls on Bathymetry |
title_sort |
thermokarst lakes on the arctic coastal plain of alaska: geomorphic controls on bathymetry |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1002/ppp.1744 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.1744 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.1744 |
long_lat |
ENVELOPE(146.601,146.601,59.667,59.667) |
geographic |
Arctic Talik |
geographic_facet |
Arctic Talik |
genre |
Arctic Ice permafrost Permafrost and Periglacial Processes Thermokarst wedge* Alaska |
genre_facet |
Arctic Ice permafrost Permafrost and Periglacial Processes Thermokarst wedge* Alaska |
op_source |
Permafrost and Periglacial Processes volume 23, issue 3, page 218-230 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.1744 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
23 |
container_issue |
3 |
container_start_page |
218 |
op_container_end_page |
230 |
_version_ |
1813445376331481088 |