A sub-millennial sediment record of ice-stream retreat and meltwater storage in the Baltic Ice Lake during the Bølling-Allerød interstadial
The rapid retreat of the Baltic Ice Stream and the development of the Baltic Ice Lake is assessed using data from sediment cores retrieved from three sub-basins in the southern Baltic Sea. Hydraulic piston coring by the International Ocean Discovery Program (IODP) recovered for the first time intact...
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ftmontclairstuni:oai:digitalcommons.montclair.edu:earth-environ-studies-facpubs-1028 2023-07-23T04:20:43+02:00 A sub-millennial sediment record of ice-stream retreat and meltwater storage in the Baltic Ice Lake during the Bølling-Allerød interstadial Kelly, April Lynn Passchier, Sandra 2018-10-15T07:00:00Z application/pdf https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/29 https://digitalcommons.montclair.edu/context/earth-environ-studies-facpubs/article/1028/viewcontent/KellyPasschier_QSR_preprint.pdf unknown Montclair State University Digital Commons https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/29 https://digitalcommons.montclair.edu/context/earth-environ-studies-facpubs/article/1028/viewcontent/KellyPasschier_QSR_preprint.pdf Department of Earth and Environmental Studies Faculty Scholarship and Creative Works Pleistocene Glaciation Scandinavia Baltic Sedimentology-marine cores XRF Earth Sciences Glaciology Sedimentology text 2018 ftmontclairstuni 2023-07-03T21:42:04Z The rapid retreat of the Baltic Ice Stream and the development of the Baltic Ice Lake is assessed using data from sediment cores retrieved from three sub-basins in the southern Baltic Sea. Hydraulic piston coring by the International Ocean Discovery Program (IODP) recovered for the first time intact glacial lake sequences overlying diamictons and other ice-contact deposits at Sites M0063, M0064 and M0065. Based on the particle size and bulk sediment chemical composition the glacial lake sediments were subdivided into a proximal and a distal varve sequence. The origin of a dark, lithologically distinct horizon between the proximal and distal varves is attributed to a lake drainage event following the opening of a spillway in central Sweden. Available age constraints suggest that the Baltic Ice Lake developed during the Bølling-Allerød interstadial and reached its maximum size at ~13 ka. Ice retreat was forced by surface melt, and amplified by calving in the upstream deepening lake environment. Furthermore, rapid ice retreat and glacio-isostatic processes allowed for the storage of substantial amounts of meltwater in the Baltic Ice Lake during the Allerød warm period. Subsequent lake drainage into the North Atlantic took place through a conduit at higher latitude than previous drainage pathways. The pronounced changes in meltwater storage and routing caused by the rapid retreat of the Baltic Ice Stream may have contributed to abrupt climate change through the effects of changing freshwater supply on Atlantic overturning circulation. Text North Atlantic Montclair State University Digital Commons Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) |
institution |
Open Polar |
collection |
Montclair State University Digital Commons |
op_collection_id |
ftmontclairstuni |
language |
unknown |
topic |
Pleistocene Glaciation Scandinavia Baltic Sedimentology-marine cores XRF Earth Sciences Glaciology Sedimentology |
spellingShingle |
Pleistocene Glaciation Scandinavia Baltic Sedimentology-marine cores XRF Earth Sciences Glaciology Sedimentology Kelly, April Lynn Passchier, Sandra A sub-millennial sediment record of ice-stream retreat and meltwater storage in the Baltic Ice Lake during the Bølling-Allerød interstadial |
topic_facet |
Pleistocene Glaciation Scandinavia Baltic Sedimentology-marine cores XRF Earth Sciences Glaciology Sedimentology |
description |
The rapid retreat of the Baltic Ice Stream and the development of the Baltic Ice Lake is assessed using data from sediment cores retrieved from three sub-basins in the southern Baltic Sea. Hydraulic piston coring by the International Ocean Discovery Program (IODP) recovered for the first time intact glacial lake sequences overlying diamictons and other ice-contact deposits at Sites M0063, M0064 and M0065. Based on the particle size and bulk sediment chemical composition the glacial lake sediments were subdivided into a proximal and a distal varve sequence. The origin of a dark, lithologically distinct horizon between the proximal and distal varves is attributed to a lake drainage event following the opening of a spillway in central Sweden. Available age constraints suggest that the Baltic Ice Lake developed during the Bølling-Allerød interstadial and reached its maximum size at ~13 ka. Ice retreat was forced by surface melt, and amplified by calving in the upstream deepening lake environment. Furthermore, rapid ice retreat and glacio-isostatic processes allowed for the storage of substantial amounts of meltwater in the Baltic Ice Lake during the Allerød warm period. Subsequent lake drainage into the North Atlantic took place through a conduit at higher latitude than previous drainage pathways. The pronounced changes in meltwater storage and routing caused by the rapid retreat of the Baltic Ice Stream may have contributed to abrupt climate change through the effects of changing freshwater supply on Atlantic overturning circulation. |
format |
Text |
author |
Kelly, April Lynn Passchier, Sandra |
author_facet |
Kelly, April Lynn Passchier, Sandra |
author_sort |
Kelly, April Lynn |
title |
A sub-millennial sediment record of ice-stream retreat and meltwater storage in the Baltic Ice Lake during the Bølling-Allerød interstadial |
title_short |
A sub-millennial sediment record of ice-stream retreat and meltwater storage in the Baltic Ice Lake during the Bølling-Allerød interstadial |
title_full |
A sub-millennial sediment record of ice-stream retreat and meltwater storage in the Baltic Ice Lake during the Bølling-Allerød interstadial |
title_fullStr |
A sub-millennial sediment record of ice-stream retreat and meltwater storage in the Baltic Ice Lake during the Bølling-Allerød interstadial |
title_full_unstemmed |
A sub-millennial sediment record of ice-stream retreat and meltwater storage in the Baltic Ice Lake during the Bølling-Allerød interstadial |
title_sort |
sub-millennial sediment record of ice-stream retreat and meltwater storage in the baltic ice lake during the bølling-allerød interstadial |
publisher |
Montclair State University Digital Commons |
publishDate |
2018 |
url |
https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/29 https://digitalcommons.montclair.edu/context/earth-environ-studies-facpubs/article/1028/viewcontent/KellyPasschier_QSR_preprint.pdf |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) |
geographic |
Glacial Lake |
geographic_facet |
Glacial Lake |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Department of Earth and Environmental Studies Faculty Scholarship and Creative Works |
op_relation |
https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/29 https://digitalcommons.montclair.edu/context/earth-environ-studies-facpubs/article/1028/viewcontent/KellyPasschier_QSR_preprint.pdf |
_version_ |
1772185402646462464 |