(Table 2) AMS radiocarbon dates from sediment cores obtained during James Clark Ross cruise JR142, Kvitøya Trough
High-resolution geophysical and sediment core data are used to investigate the pattern and dynamics of former ice flow in Kvitøya Trough, northwestern Barents Sea. A new swath-bathymetric dataset identifies three types of submarine landform in the study area (streamlined landforms, meltwater channel...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.811288 2023-05-15T15:39:11+02:00 (Table 2) AMS radiocarbon dates from sediment cores obtained during James Clark Ross cruise JR142, Kvitøya Trough Hogan, Kelly A Dowdeswell, Julian A Noormets, R Evans, Jeffrey Ó Cofaigh, Colm Jakobsson, Martin MEDIAN LATITUDE: 80.783945 * MEDIAN LONGITUDE: 29.287995 * SOUTH-BOUND LATITUDE: 80.485990 * WEST-BOUND LONGITUDE: 28.927100 * NORTH-BOUND LATITUDE: 81.081900 * EAST-BOUND LONGITUDE: 29.648890 * DATE/TIME START: 2006-08-01T00:00:00 * DATE/TIME END: 2006-08-01T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.99 m * MAXIMUM DEPTH, sediment/rock: 1.98 m 2010-05-06 text/tab-separated-values, 12 data points https://doi.pangaea.de/10.1594/PANGAEA.811288 https://doi.org/10.1594/PANGAEA.811288 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.811288 https://doi.org/10.1594/PANGAEA.811288 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Hogan, Kelly A; Dowdeswell, Julian A; Noormets, R; Evans, Jeffrey; Ó Cofaigh, Colm; Jakobsson, Martin (2010): Submarine landforms and ice-sheet flow in the Kvitøya Trough, northwestern Barents Sea. Quaternary Science Reviews, 29(25-26), 3545-3562, https://doi.org/10.1016/j.quascirev.2010.08.015 Age 14C AMS dated dated material dated standard deviation Core DEPTH sediment/rock Event label GC Gravity corer International Polar Year (2007-2008) IPY James Clark Ross JR142 JR142-GC10 JR142-GC11 JR20060728 Latitude of event Longitude of event Svalbard Shelf Dataset 2010 ftpangaea https://doi.org/10.1594/PANGAEA.811288 https://doi.org/10.1016/j.quascirev.2010.08.015 2023-01-20T09:01:04Z High-resolution geophysical and sediment core data are used to investigate the pattern and dynamics of former ice flow in Kvitøya Trough, northwestern Barents Sea. A new swath-bathymetric dataset identifies three types of submarine landform in the study area (streamlined landforms, meltwater channels and cavities, iceberg scours). Subglacially produced streamlined landforms provide a record of ice flow through Kvitøya Trough during the last glaciation. Flow directions are inferred from the orientations of streamlined landforms (drumlins, crag-and-tail features). Ice flowed northward for at least 135 km from an ice divide at the southern end of Kvitøya Trough. A large channel-cavity system incised into bedrock in the southern trough indicates that subglacial meltwater was present at the former ice-sheet base. Modest landform elongation ratios and a lack of mega-scale glacial lineations suggest that, although ice in Kvitøya Trough was melting at the bed and flowed faster than the likely thin and cold-based ice on adjacent banks, a major ice stream probably did not occupy the trough. Retreat was relatively rapid after 14-13.5 14C kyr B.P. and probably progressed via ice sheet-bed decoupling in response to rising sea level. There is little evidence for still stands during ice retreat or of ice-proximal deglacial sediments. Relict iceberg scours in present-day water depths of more than 350 m in the northern trough indicate that calving was an important mass loss mechanism during retreat. Dataset Barents Sea Ice Sheet International Polar Year IPY Kvitøya Svalbard PANGAEA - Data Publisher for Earth & Environmental Science Svalbard Barents Sea ENVELOPE(28.927100,29.648890,81.081900,80.485990) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Age 14C AMS dated dated material dated standard deviation Core DEPTH sediment/rock Event label GC Gravity corer International Polar Year (2007-2008) IPY James Clark Ross JR142 JR142-GC10 JR142-GC11 JR20060728 Latitude of event Longitude of event Svalbard Shelf |
spellingShingle |
Age 14C AMS dated dated material dated standard deviation Core DEPTH sediment/rock Event label GC Gravity corer International Polar Year (2007-2008) IPY James Clark Ross JR142 JR142-GC10 JR142-GC11 JR20060728 Latitude of event Longitude of event Svalbard Shelf Hogan, Kelly A Dowdeswell, Julian A Noormets, R Evans, Jeffrey Ó Cofaigh, Colm Jakobsson, Martin (Table 2) AMS radiocarbon dates from sediment cores obtained during James Clark Ross cruise JR142, Kvitøya Trough |
topic_facet |
Age 14C AMS dated dated material dated standard deviation Core DEPTH sediment/rock Event label GC Gravity corer International Polar Year (2007-2008) IPY James Clark Ross JR142 JR142-GC10 JR142-GC11 JR20060728 Latitude of event Longitude of event Svalbard Shelf |
description |
High-resolution geophysical and sediment core data are used to investigate the pattern and dynamics of former ice flow in Kvitøya Trough, northwestern Barents Sea. A new swath-bathymetric dataset identifies three types of submarine landform in the study area (streamlined landforms, meltwater channels and cavities, iceberg scours). Subglacially produced streamlined landforms provide a record of ice flow through Kvitøya Trough during the last glaciation. Flow directions are inferred from the orientations of streamlined landforms (drumlins, crag-and-tail features). Ice flowed northward for at least 135 km from an ice divide at the southern end of Kvitøya Trough. A large channel-cavity system incised into bedrock in the southern trough indicates that subglacial meltwater was present at the former ice-sheet base. Modest landform elongation ratios and a lack of mega-scale glacial lineations suggest that, although ice in Kvitøya Trough was melting at the bed and flowed faster than the likely thin and cold-based ice on adjacent banks, a major ice stream probably did not occupy the trough. Retreat was relatively rapid after 14-13.5 14C kyr B.P. and probably progressed via ice sheet-bed decoupling in response to rising sea level. There is little evidence for still stands during ice retreat or of ice-proximal deglacial sediments. Relict iceberg scours in present-day water depths of more than 350 m in the northern trough indicate that calving was an important mass loss mechanism during retreat. |
format |
Dataset |
author |
Hogan, Kelly A Dowdeswell, Julian A Noormets, R Evans, Jeffrey Ó Cofaigh, Colm Jakobsson, Martin |
author_facet |
Hogan, Kelly A Dowdeswell, Julian A Noormets, R Evans, Jeffrey Ó Cofaigh, Colm Jakobsson, Martin |
author_sort |
Hogan, Kelly A |
title |
(Table 2) AMS radiocarbon dates from sediment cores obtained during James Clark Ross cruise JR142, Kvitøya Trough |
title_short |
(Table 2) AMS radiocarbon dates from sediment cores obtained during James Clark Ross cruise JR142, Kvitøya Trough |
title_full |
(Table 2) AMS radiocarbon dates from sediment cores obtained during James Clark Ross cruise JR142, Kvitøya Trough |
title_fullStr |
(Table 2) AMS radiocarbon dates from sediment cores obtained during James Clark Ross cruise JR142, Kvitøya Trough |
title_full_unstemmed |
(Table 2) AMS radiocarbon dates from sediment cores obtained during James Clark Ross cruise JR142, Kvitøya Trough |
title_sort |
(table 2) ams radiocarbon dates from sediment cores obtained during james clark ross cruise jr142, kvitøya trough |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.811288 https://doi.org/10.1594/PANGAEA.811288 |
op_coverage |
MEDIAN LATITUDE: 80.783945 * MEDIAN LONGITUDE: 29.287995 * SOUTH-BOUND LATITUDE: 80.485990 * WEST-BOUND LONGITUDE: 28.927100 * NORTH-BOUND LATITUDE: 81.081900 * EAST-BOUND LONGITUDE: 29.648890 * DATE/TIME START: 2006-08-01T00:00:00 * DATE/TIME END: 2006-08-01T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.99 m * MAXIMUM DEPTH, sediment/rock: 1.98 m |
long_lat |
ENVELOPE(28.927100,29.648890,81.081900,80.485990) |
geographic |
Svalbard Barents Sea |
geographic_facet |
Svalbard Barents Sea |
genre |
Barents Sea Ice Sheet International Polar Year IPY Kvitøya Svalbard |
genre_facet |
Barents Sea Ice Sheet International Polar Year IPY Kvitøya Svalbard |
op_source |
Supplement to: Hogan, Kelly A; Dowdeswell, Julian A; Noormets, R; Evans, Jeffrey; Ó Cofaigh, Colm; Jakobsson, Martin (2010): Submarine landforms and ice-sheet flow in the Kvitøya Trough, northwestern Barents Sea. Quaternary Science Reviews, 29(25-26), 3545-3562, https://doi.org/10.1016/j.quascirev.2010.08.015 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.811288 https://doi.org/10.1594/PANGAEA.811288 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.811288 https://doi.org/10.1016/j.quascirev.2010.08.015 |
_version_ |
1766370662681673728 |