Water blister geomorphology and subglacial drainage sediments: an example from the bed of the Fennoscandian Ice Sheet in SW Finland
This study presents the first light detection and ranging (LiDAR)-based morphometric description of a water blister from a past ice-sheet bed caused by rapid supraglacial drainage. The blister formed during the rapid early Holocene deglaciation of the Fennoscandian Ice Sheet (FIS). It is located in...
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ftdoajarticles:oai:doaj.org/article:f97a345d6e3d49fcbd18a9bcd617b5fe 2023-07-16T03:58:24+02:00 Water blister geomorphology and subglacial drainage sediments: an example from the bed of the Fennoscandian Ice Sheet in SW Finland Joni Mäkinen Christine F. Dow Elina Ahokangas Antti Ojala Kari Kajuutti Juulia Kautto Jukka-Pekka Palmu https://doi.org/10.1017/jog.2023.37 https://doaj.org/article/f97a345d6e3d49fcbd18a9bcd617b5fe EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143023000370/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2023.37 0022-1430 1727-5652 https://doaj.org/article/f97a345d6e3d49fcbd18a9bcd617b5fe Journal of Glaciology, Pp 1-17 glacial geomorphology glacier hydrology remote sensing subglacial processes subglacial sediments Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article ftdoajarticles https://doi.org/10.1017/jog.2023.37 2023-06-25T00:36:01Z This study presents the first light detection and ranging (LiDAR)-based morphometric description of a water blister from a past ice-sheet bed caused by rapid supraglacial drainage. The blister formed during the rapid early Holocene deglaciation of the Fennoscandian Ice Sheet (FIS). It is located in southwest Finland within a subglacial meltwater route interpreted to represent the transition from a distributed to a channelized drainage system. A LiDAR digital elevation model was supplemented with sedimentological and ground-penetrating radar data on blister outflow channels and sedimentology of downflow polymorphous mounds and ridges (PMRs). Unlike the water blisters recorded from the rapid drainage of supraglacial lakes on the Greenland Ice Sheet, the smaller blister size here was either due to crevasse or moulin drainage, or was a supraglacial lake drainage that tapped into a pre-existing, relatively efficient drainage system and related semi-sorted sediments, promoting rapid drainage and reworking of PMRs along the meltwater route. The preservation potential or exposure probability of blister marks is presumably low but they can provide important information about evolution of subglacial drainage systems that is of value to modern interpretations of glacial hydrology. Article in Journal/Newspaper Fennoscandian glacier Greenland Ice Sheet Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Greenland Journal of Glaciology 1 17 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
glacial geomorphology glacier hydrology remote sensing subglacial processes subglacial sediments Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
glacial geomorphology glacier hydrology remote sensing subglacial processes subglacial sediments Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Joni Mäkinen Christine F. Dow Elina Ahokangas Antti Ojala Kari Kajuutti Juulia Kautto Jukka-Pekka Palmu Water blister geomorphology and subglacial drainage sediments: an example from the bed of the Fennoscandian Ice Sheet in SW Finland |
topic_facet |
glacial geomorphology glacier hydrology remote sensing subglacial processes subglacial sediments Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
This study presents the first light detection and ranging (LiDAR)-based morphometric description of a water blister from a past ice-sheet bed caused by rapid supraglacial drainage. The blister formed during the rapid early Holocene deglaciation of the Fennoscandian Ice Sheet (FIS). It is located in southwest Finland within a subglacial meltwater route interpreted to represent the transition from a distributed to a channelized drainage system. A LiDAR digital elevation model was supplemented with sedimentological and ground-penetrating radar data on blister outflow channels and sedimentology of downflow polymorphous mounds and ridges (PMRs). Unlike the water blisters recorded from the rapid drainage of supraglacial lakes on the Greenland Ice Sheet, the smaller blister size here was either due to crevasse or moulin drainage, or was a supraglacial lake drainage that tapped into a pre-existing, relatively efficient drainage system and related semi-sorted sediments, promoting rapid drainage and reworking of PMRs along the meltwater route. The preservation potential or exposure probability of blister marks is presumably low but they can provide important information about evolution of subglacial drainage systems that is of value to modern interpretations of glacial hydrology. |
format |
Article in Journal/Newspaper |
author |
Joni Mäkinen Christine F. Dow Elina Ahokangas Antti Ojala Kari Kajuutti Juulia Kautto Jukka-Pekka Palmu |
author_facet |
Joni Mäkinen Christine F. Dow Elina Ahokangas Antti Ojala Kari Kajuutti Juulia Kautto Jukka-Pekka Palmu |
author_sort |
Joni Mäkinen |
title |
Water blister geomorphology and subglacial drainage sediments: an example from the bed of the Fennoscandian Ice Sheet in SW Finland |
title_short |
Water blister geomorphology and subglacial drainage sediments: an example from the bed of the Fennoscandian Ice Sheet in SW Finland |
title_full |
Water blister geomorphology and subglacial drainage sediments: an example from the bed of the Fennoscandian Ice Sheet in SW Finland |
title_fullStr |
Water blister geomorphology and subglacial drainage sediments: an example from the bed of the Fennoscandian Ice Sheet in SW Finland |
title_full_unstemmed |
Water blister geomorphology and subglacial drainage sediments: an example from the bed of the Fennoscandian Ice Sheet in SW Finland |
title_sort |
water blister geomorphology and subglacial drainage sediments: an example from the bed of the fennoscandian ice sheet in sw finland |
publisher |
Cambridge University Press |
url |
https://doi.org/10.1017/jog.2023.37 https://doaj.org/article/f97a345d6e3d49fcbd18a9bcd617b5fe |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Fennoscandian glacier Greenland Ice Sheet Journal of Glaciology |
genre_facet |
Fennoscandian glacier Greenland Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology, Pp 1-17 |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143023000370/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2023.37 0022-1430 1727-5652 https://doaj.org/article/f97a345d6e3d49fcbd18a9bcd617b5fe |
op_doi |
https://doi.org/10.1017/jog.2023.37 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
17 |
_version_ |
1771545482594615296 |