A 100-year record of changes in water renewal rate in Sermilik Fjord and its influence on calving of Helheim Glacier, Southeast Greenland
Here we present a 100 year long proxy record for the renewal rate of the subsurface ocean waters in Sermilik Fjord at the edge of Helheim Glacier, based on investigations of two sediment cores (ER11-24 and ER11-25) obtained from the head of the fjord. By calculating the mean sortable silt ((SS) over...
Published in: | Continental Shelf Research |
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Main Authors: | , , , , , , , , , , |
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Language: | English |
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2014
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Online Access: | https://pure.au.dk/portal/da/publications/a-100year-record-of-changes-in-water-renewal-rate-in-sermilik-fjord-and-its-influence-on-calving-of-helheim-glacier-southeast-greenland(e71c6c16-7563-4d9e-bf1f-3d15afbb13a7).html https://doi.org/10.1016/j.csr.2014.05.017 |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/e71c6c16-7563-4d9e-bf1f-3d15afbb13a7 2023-12-31T10:06:22+01:00 A 100-year record of changes in water renewal rate in Sermilik Fjord and its influence on calving of Helheim Glacier, Southeast Greenland Andresen, Camilla S. Schmidt, S. Seidenkrantz, Marit-Solveig Straneo, F. Grycel, A. Hass, C Kjær, K.H. Nørgaard-Pedersen, N. Dyke, L.M. Olsen, Jesper Kuijpers, A. 2014 https://pure.au.dk/portal/da/publications/a-100year-record-of-changes-in-water-renewal-rate-in-sermilik-fjord-and-its-influence-on-calving-of-helheim-glacier-southeast-greenland(e71c6c16-7563-4d9e-bf1f-3d15afbb13a7).html https://doi.org/10.1016/j.csr.2014.05.017 eng eng https://pure.au.dk/portal/da/publications/a-100year-record-of-changes-in-water-renewal-rate-in-sermilik-fjord-and-its-influence-on-calving-of-helheim-glacier-southeast-greenland(e71c6c16-7563-4d9e-bf1f-3d15afbb13a7).html info:eu-repo/semantics/restrictedAccess Andresen , C S , Schmidt , S , Seidenkrantz , M-S , Straneo , F , Grycel , A , Hass , C , Kjær , K H , Nørgaard-Pedersen , N , Dyke , L M , Olsen , J & Kuijpers , A 2014 , ' A 100-year record of changes in water renewal rate in Sermilik Fjord and its influence on calving of Helheim Glacier, Southeast Greenland ' , Continental Shelf Research , vol. 85 , pp. 21-29 . https://doi.org/10.1016/j.csr.2014.05.017 SE Greenland Outlet glaciers Fjord circulation Glacial plume sedimentation Ice-ocean interactions North Atlantic oscillation EAST GREENLAND ICE-SHEET SEDIMENT DEPOSITION JAKOBSHAVN ISBRAE BARRIER WINDS VARIABILITY CIRCULATION CLIMATOLOGY article 2014 ftuniaarhuspubl https://doi.org/10.1016/j.csr.2014.05.017 2023-12-07T00:00:51Z Here we present a 100 year long proxy record for the renewal rate of the subsurface ocean waters in Sermilik Fjord at the edge of Helheim Glacier, based on investigations of two sediment cores (ER11-24 and ER11-25) obtained from the head of the fjord. By calculating the mean sortable silt ((SS) over bar) in current-sorted melt water plume sediments we find that episodes of increased water renewal rates lasting 3-5 years coincide with a positive North Atlantic Oscillation (NAO) index. This is not surprising as low pressure systems and northeasterly storms are observed more frequently along the east coast of Greenland during positive NAO years as a result of the northward shift in the North Atlantic storm track. Previous studies of sediment cores obtained from the mid-region of the fjord showed that Helheim Glacier destabilization coincides with a negative NAO index. Therefore we conclude that inter-annual variability in storm-induced flushing of Sermilik Fjord and thus the water renewal rate towards the glacier margin is not the controlling factor for inter-annual variability in Helheim Glacier destabilization. Such knowledge may have implications on predictive model studies of ice-ocean interactions and glacier behavior. (C) 2014 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper East Greenland glacier Greenland Ice Sheet Jakobshavn North Atlantic North Atlantic oscillation Sermilik Aarhus University: Research Continental Shelf Research 85 21 29 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
SE Greenland Outlet glaciers Fjord circulation Glacial plume sedimentation Ice-ocean interactions North Atlantic oscillation EAST GREENLAND ICE-SHEET SEDIMENT DEPOSITION JAKOBSHAVN ISBRAE BARRIER WINDS VARIABILITY CIRCULATION CLIMATOLOGY |
spellingShingle |
SE Greenland Outlet glaciers Fjord circulation Glacial plume sedimentation Ice-ocean interactions North Atlantic oscillation EAST GREENLAND ICE-SHEET SEDIMENT DEPOSITION JAKOBSHAVN ISBRAE BARRIER WINDS VARIABILITY CIRCULATION CLIMATOLOGY Andresen, Camilla S. Schmidt, S. Seidenkrantz, Marit-Solveig Straneo, F. Grycel, A. Hass, C Kjær, K.H. Nørgaard-Pedersen, N. Dyke, L.M. Olsen, Jesper Kuijpers, A. A 100-year record of changes in water renewal rate in Sermilik Fjord and its influence on calving of Helheim Glacier, Southeast Greenland |
topic_facet |
SE Greenland Outlet glaciers Fjord circulation Glacial plume sedimentation Ice-ocean interactions North Atlantic oscillation EAST GREENLAND ICE-SHEET SEDIMENT DEPOSITION JAKOBSHAVN ISBRAE BARRIER WINDS VARIABILITY CIRCULATION CLIMATOLOGY |
description |
Here we present a 100 year long proxy record for the renewal rate of the subsurface ocean waters in Sermilik Fjord at the edge of Helheim Glacier, based on investigations of two sediment cores (ER11-24 and ER11-25) obtained from the head of the fjord. By calculating the mean sortable silt ((SS) over bar) in current-sorted melt water plume sediments we find that episodes of increased water renewal rates lasting 3-5 years coincide with a positive North Atlantic Oscillation (NAO) index. This is not surprising as low pressure systems and northeasterly storms are observed more frequently along the east coast of Greenland during positive NAO years as a result of the northward shift in the North Atlantic storm track. Previous studies of sediment cores obtained from the mid-region of the fjord showed that Helheim Glacier destabilization coincides with a negative NAO index. Therefore we conclude that inter-annual variability in storm-induced flushing of Sermilik Fjord and thus the water renewal rate towards the glacier margin is not the controlling factor for inter-annual variability in Helheim Glacier destabilization. Such knowledge may have implications on predictive model studies of ice-ocean interactions and glacier behavior. (C) 2014 Elsevier Ltd. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Andresen, Camilla S. Schmidt, S. Seidenkrantz, Marit-Solveig Straneo, F. Grycel, A. Hass, C Kjær, K.H. Nørgaard-Pedersen, N. Dyke, L.M. Olsen, Jesper Kuijpers, A. |
author_facet |
Andresen, Camilla S. Schmidt, S. Seidenkrantz, Marit-Solveig Straneo, F. Grycel, A. Hass, C Kjær, K.H. Nørgaard-Pedersen, N. Dyke, L.M. Olsen, Jesper Kuijpers, A. |
author_sort |
Andresen, Camilla S. |
title |
A 100-year record of changes in water renewal rate in Sermilik Fjord and its influence on calving of Helheim Glacier, Southeast Greenland |
title_short |
A 100-year record of changes in water renewal rate in Sermilik Fjord and its influence on calving of Helheim Glacier, Southeast Greenland |
title_full |
A 100-year record of changes in water renewal rate in Sermilik Fjord and its influence on calving of Helheim Glacier, Southeast Greenland |
title_fullStr |
A 100-year record of changes in water renewal rate in Sermilik Fjord and its influence on calving of Helheim Glacier, Southeast Greenland |
title_full_unstemmed |
A 100-year record of changes in water renewal rate in Sermilik Fjord and its influence on calving of Helheim Glacier, Southeast Greenland |
title_sort |
100-year record of changes in water renewal rate in sermilik fjord and its influence on calving of helheim glacier, southeast greenland |
publishDate |
2014 |
url |
https://pure.au.dk/portal/da/publications/a-100year-record-of-changes-in-water-renewal-rate-in-sermilik-fjord-and-its-influence-on-calving-of-helheim-glacier-southeast-greenland(e71c6c16-7563-4d9e-bf1f-3d15afbb13a7).html https://doi.org/10.1016/j.csr.2014.05.017 |
genre |
East Greenland glacier Greenland Ice Sheet Jakobshavn North Atlantic North Atlantic oscillation Sermilik |
genre_facet |
East Greenland glacier Greenland Ice Sheet Jakobshavn North Atlantic North Atlantic oscillation Sermilik |
op_source |
Andresen , C S , Schmidt , S , Seidenkrantz , M-S , Straneo , F , Grycel , A , Hass , C , Kjær , K H , Nørgaard-Pedersen , N , Dyke , L M , Olsen , J & Kuijpers , A 2014 , ' A 100-year record of changes in water renewal rate in Sermilik Fjord and its influence on calving of Helheim Glacier, Southeast Greenland ' , Continental Shelf Research , vol. 85 , pp. 21-29 . https://doi.org/10.1016/j.csr.2014.05.017 |
op_relation |
https://pure.au.dk/portal/da/publications/a-100year-record-of-changes-in-water-renewal-rate-in-sermilik-fjord-and-its-influence-on-calving-of-helheim-glacier-southeast-greenland(e71c6c16-7563-4d9e-bf1f-3d15afbb13a7).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.csr.2014.05.017 |
container_title |
Continental Shelf Research |
container_volume |
85 |
container_start_page |
21 |
op_container_end_page |
29 |
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1786838374668042240 |