A method to reduce the influence of ice-rafted debris on a grain size record from northern Fram Strait, Arctic Ocean
The granulometric composition of terrigenous deep-sea sediments provides information on current speed if certain frame conditions are fulfilled. These include that current transport is the only transport process. At high latitudes this type of investigation is impaired due to the influence of ice-ra...
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Language: | English |
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Norwegian Polar Institute
2002
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Online Access: | https://polarresearch.net/index.php/polar/article/view/2147 https://doi.org/10.3402/polar.v21i2.6491 |
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ftjpolarres:oai:journals.openacademia.net:article/2147 2023-05-15T14:57:19+02:00 A method to reduce the influence of ice-rafted debris on a grain size record from northern Fram Strait, Arctic Ocean Hass, H. Christian 2002-01-12 application/pdf https://polarresearch.net/index.php/polar/article/view/2147 https://doi.org/10.3402/polar.v21i2.6491 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2147/5398 https://polarresearch.net/index.php/polar/article/view/2147 doi:10.3402/polar.v21i2.6491 Copyright (c) 2018 Polar Research Polar Research; Vol. 21 No. 2 (2002): Special issue: Proceedings of the Changes in Climate and Environment at High Latitudes Conference; 299-306 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2002 ftjpolarres https://doi.org/10.3402/polar.v21i2.6491 2021-11-11T19:12:09Z The granulometric composition of terrigenous deep-sea sediments provides information on current speed if certain frame conditions are fulfilled. These include that current transport is the only transport process. At high latitudes this type of investigation is impaired due to the influence of ice-rafted debris (IRD) which contaminates the current-sorted grain size fractions. This study presents a new method that addresses this problem by setting the ice-rafted sand in relation to the silt of both current- and ice-transported origin. Deviations from the resulting regression function are then used to determine the behaviour of the silt mean grain size as a function of current speed largely independent from IRD bias. The study is based on sediments from the Yermak Plateau, Arctic Ocean, a region influenced by IRD brought with the south-headed Transpolar Drift and by north-directed bottom currents. The IRD correction results in displaying changes of current speed at much higher clarity; climate forcing of the currents becomes more evident. For example, the 8200 year cold event shows up as a major event in the corrected record whereas it is hardly visible in the original record. Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait Polar Research Yermak plateau Polar Research (E-Journal) Arctic Arctic Ocean Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) Polar Research 21 2 299 306 |
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Open Polar |
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Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
description |
The granulometric composition of terrigenous deep-sea sediments provides information on current speed if certain frame conditions are fulfilled. These include that current transport is the only transport process. At high latitudes this type of investigation is impaired due to the influence of ice-rafted debris (IRD) which contaminates the current-sorted grain size fractions. This study presents a new method that addresses this problem by setting the ice-rafted sand in relation to the silt of both current- and ice-transported origin. Deviations from the resulting regression function are then used to determine the behaviour of the silt mean grain size as a function of current speed largely independent from IRD bias. The study is based on sediments from the Yermak Plateau, Arctic Ocean, a region influenced by IRD brought with the south-headed Transpolar Drift and by north-directed bottom currents. The IRD correction results in displaying changes of current speed at much higher clarity; climate forcing of the currents becomes more evident. For example, the 8200 year cold event shows up as a major event in the corrected record whereas it is hardly visible in the original record. |
format |
Article in Journal/Newspaper |
author |
Hass, H. Christian |
spellingShingle |
Hass, H. Christian A method to reduce the influence of ice-rafted debris on a grain size record from northern Fram Strait, Arctic Ocean |
author_facet |
Hass, H. Christian |
author_sort |
Hass, H. Christian |
title |
A method to reduce the influence of ice-rafted debris on a grain size record from northern Fram Strait, Arctic Ocean |
title_short |
A method to reduce the influence of ice-rafted debris on a grain size record from northern Fram Strait, Arctic Ocean |
title_full |
A method to reduce the influence of ice-rafted debris on a grain size record from northern Fram Strait, Arctic Ocean |
title_fullStr |
A method to reduce the influence of ice-rafted debris on a grain size record from northern Fram Strait, Arctic Ocean |
title_full_unstemmed |
A method to reduce the influence of ice-rafted debris on a grain size record from northern Fram Strait, Arctic Ocean |
title_sort |
method to reduce the influence of ice-rafted debris on a grain size record from northern fram strait, arctic ocean |
publisher |
Norwegian Polar Institute |
publishDate |
2002 |
url |
https://polarresearch.net/index.php/polar/article/view/2147 https://doi.org/10.3402/polar.v21i2.6491 |
long_lat |
ENVELOPE(5.000,5.000,81.250,81.250) |
geographic |
Arctic Arctic Ocean Yermak Plateau |
geographic_facet |
Arctic Arctic Ocean Yermak Plateau |
genre |
Arctic Arctic Ocean Fram Strait Polar Research Yermak plateau |
genre_facet |
Arctic Arctic Ocean Fram Strait Polar Research Yermak plateau |
op_source |
Polar Research; Vol. 21 No. 2 (2002): Special issue: Proceedings of the Changes in Climate and Environment at High Latitudes Conference; 299-306 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2147/5398 https://polarresearch.net/index.php/polar/article/view/2147 doi:10.3402/polar.v21i2.6491 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v21i2.6491 |
container_title |
Polar Research |
container_volume |
21 |
container_issue |
2 |
container_start_page |
299 |
op_container_end_page |
306 |
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1766329394564956160 |