Quaternary interaction of cryospheric and oceanographic processes along the central‐east Greenland margin
The east Greenland margin has been influenced by oceanographic and cryospheric processes since the late Miocene, when the southwards flow of the East Greenland Current ( EGC ) initiated and ice sheets first advanced across the margin. However, the relative importance of these processes, and their in...
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crwiley:10.1111/bor.12340 2024-06-02T08:05:54+00:00 Quaternary interaction of cryospheric and oceanographic processes along the central‐east Greenland margin Pérez, Lara F. Nielsen, Tove Rasmussen, Tine L. Winsborrow, Monica Research Executive Agency Norges Forskningsråd 2018 http://dx.doi.org/10.1111/bor.12340 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fbor.12340 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12340 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 48, issue 1, page 72-91 ISSN 0300-9483 1502-3885 journal-article 2018 crwiley https://doi.org/10.1111/bor.12340 2024-05-03T11:48:11Z The east Greenland margin has been influenced by oceanographic and cryospheric processes since the late Miocene, when the southwards flow of the East Greenland Current ( EGC ) initiated and ice sheets first advanced across the margin. However, the relative importance of these processes, and their influence on the sedimentation of the margin through time remains poorly understood. High‐resolution single‐channel seismic, chirp sub‐bottom profiles and swath bathymetry data were acquired along the middle/lower slope and proximal basinal area off Liverpool Land, central‐east Greenland margin. In this study, seismic‐stratigraphical and morphological analyses allowed us to distinguish between the major sedimentary processes that influenced this margin during the Quaternary. The stratigraphical architecture reveals mass transport deposits ( MTD s) related to glacially influenced down‐slope sedimentation. These are intercalated with buried contourite systems associated with bottom‐current controlled along‐slope sedimentation. The distribution of the MTD s suggests the influence of two distinct ice‐stream systems. Initial phases of down‐slope deposition during the early‐middle Quaternary appears to be related to distal deposition fed by an ice stream from the Scoresby Sund area in the south. Shallow sedimentary processes, together with morphological analysis of the sea floor, show that the most recent activity of down‐slope processes during the latest Quaternary has occurred in the north, linked to an ice stream from the Kong Oscar Fjord area. These observations document a temporal shift in the relative dominance of the Scoresby Sund and Kong Oscar Fjord ice‐stream systems. The glacial influence on the margin has been interrupted by periods of stronger activity of along‐slope bottom‐current flow, demonstrating that the EGC periodically controlled sedimentation on the continental margin. Article in Journal/Newspaper East Greenland east greenland current Greenland Kong Oscar fjord Scoresby Sund Wiley Online Library Greenland Sund ENVELOPE(13.644,13.644,66.207,66.207) Scoresby ENVELOPE(162.750,162.750,-66.567,-66.567) Scoresby Sund ENVELOPE(-24.387,-24.387,70.476,70.476) Liverpool Land ENVELOPE(-22.200,-22.200,70.917,70.917) Kong Oscar Fjord ENVELOPE(-23.935,-23.935,72.361,72.361) Boreas 48 1 72 91 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
The east Greenland margin has been influenced by oceanographic and cryospheric processes since the late Miocene, when the southwards flow of the East Greenland Current ( EGC ) initiated and ice sheets first advanced across the margin. However, the relative importance of these processes, and their influence on the sedimentation of the margin through time remains poorly understood. High‐resolution single‐channel seismic, chirp sub‐bottom profiles and swath bathymetry data were acquired along the middle/lower slope and proximal basinal area off Liverpool Land, central‐east Greenland margin. In this study, seismic‐stratigraphical and morphological analyses allowed us to distinguish between the major sedimentary processes that influenced this margin during the Quaternary. The stratigraphical architecture reveals mass transport deposits ( MTD s) related to glacially influenced down‐slope sedimentation. These are intercalated with buried contourite systems associated with bottom‐current controlled along‐slope sedimentation. The distribution of the MTD s suggests the influence of two distinct ice‐stream systems. Initial phases of down‐slope deposition during the early‐middle Quaternary appears to be related to distal deposition fed by an ice stream from the Scoresby Sund area in the south. Shallow sedimentary processes, together with morphological analysis of the sea floor, show that the most recent activity of down‐slope processes during the latest Quaternary has occurred in the north, linked to an ice stream from the Kong Oscar Fjord area. These observations document a temporal shift in the relative dominance of the Scoresby Sund and Kong Oscar Fjord ice‐stream systems. The glacial influence on the margin has been interrupted by periods of stronger activity of along‐slope bottom‐current flow, demonstrating that the EGC periodically controlled sedimentation on the continental margin. |
author2 |
Research Executive Agency Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Pérez, Lara F. Nielsen, Tove Rasmussen, Tine L. Winsborrow, Monica |
spellingShingle |
Pérez, Lara F. Nielsen, Tove Rasmussen, Tine L. Winsborrow, Monica Quaternary interaction of cryospheric and oceanographic processes along the central‐east Greenland margin |
author_facet |
Pérez, Lara F. Nielsen, Tove Rasmussen, Tine L. Winsborrow, Monica |
author_sort |
Pérez, Lara F. |
title |
Quaternary interaction of cryospheric and oceanographic processes along the central‐east Greenland margin |
title_short |
Quaternary interaction of cryospheric and oceanographic processes along the central‐east Greenland margin |
title_full |
Quaternary interaction of cryospheric and oceanographic processes along the central‐east Greenland margin |
title_fullStr |
Quaternary interaction of cryospheric and oceanographic processes along the central‐east Greenland margin |
title_full_unstemmed |
Quaternary interaction of cryospheric and oceanographic processes along the central‐east Greenland margin |
title_sort |
quaternary interaction of cryospheric and oceanographic processes along the central‐east greenland margin |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1111/bor.12340 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fbor.12340 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12340 |
long_lat |
ENVELOPE(13.644,13.644,66.207,66.207) ENVELOPE(162.750,162.750,-66.567,-66.567) ENVELOPE(-24.387,-24.387,70.476,70.476) ENVELOPE(-22.200,-22.200,70.917,70.917) ENVELOPE(-23.935,-23.935,72.361,72.361) |
geographic |
Greenland Sund Scoresby Scoresby Sund Liverpool Land Kong Oscar Fjord |
geographic_facet |
Greenland Sund Scoresby Scoresby Sund Liverpool Land Kong Oscar Fjord |
genre |
East Greenland east greenland current Greenland Kong Oscar fjord Scoresby Sund |
genre_facet |
East Greenland east greenland current Greenland Kong Oscar fjord Scoresby Sund |
op_source |
Boreas volume 48, issue 1, page 72-91 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/bor.12340 |
container_title |
Boreas |
container_volume |
48 |
container_issue |
1 |
container_start_page |
72 |
op_container_end_page |
91 |
_version_ |
1800750792623259648 |