Modern dirty sea ice characteristics and sources : The role of anchor ice
Extensive dirty ice patches with up to 7 kg m−2 sediment concentrations in layers of up to 10 cm thickness were encountered in 2005 and 2007 in numerous areas across the central Arctic. The Fe grain fingerprint determination of sources for these sampled dirty ice floes indicated both Russian and Can...
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Institutionen för geologiska vetenskaper
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ftstockholmuniv:oai:DiVA.org:su-67080 2023-05-15T14:43:22+02:00 Modern dirty sea ice characteristics and sources : The role of anchor ice Darby A., Dennis Myers, Wesley B. Jakobsson, Martin Rigor, Ignatius 2011 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-67080 https://doi.org/10.1029/2010JC006675 eng eng Institutionen för geologiska vetenskaper Old Dominion University University of Washington Journal of Geophysical Research, 0148-0227, 2011, 116:C09008, http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-67080 doi:10.1029/2010JC006675 ISI:000295132300002 info:eu-repo/semantics/openAccess sea ice Arctic Ocean sediment Geosciences Multidisciplinary Multidisciplinär geovetenskap Article in journal info:eu-repo/semantics/article text 2011 ftstockholmuniv https://doi.org/10.1029/2010JC006675 2023-02-23T21:42:04Z Extensive dirty ice patches with up to 7 kg m−2 sediment concentrations in layers of up to 10 cm thickness were encountered in 2005 and 2007 in numerous areas across the central Arctic. The Fe grain fingerprint determination of sources for these sampled dirty ice floes indicated both Russian and Canadian sources, with the latter dominating. The presence of benthic shells and sea weeds along with thick layers (2–10 cm) of sediment covering 5–10 m2 indicates an anchor ice entrainment origin as opposed to suspension freezing for some of these floes. The anchor ice origin might explain the dominance of Canadian sources where only narrow flaw leads occur that would not favor suspension freezing as an entrainment process. Expandable clays, commonly used as an indicator of a Kara Sea origin for dirty sea ice, are present in moderately high percentages (>20%) in many circum-Arctic source areas, including the Arctic coasts of North America. Some differences between the Russian and the North American coastal areas are found in clay mineral abundance, primarily the much higher abundance of chlorite in North America and the northern Barents Sea as opposed to the rest of the Russian Arctic. However, sea ice clay mineralogy matched many source areas, making it difficult to use as a provenance tool by itself. The bulk mineralogy (clay and non-clay) does not match specific sources possibly due to reworking of the sediment in dirty floes through summer melting or the failure to characterize all possible source areas. VR: THE ARCTIC OCEAN PLEISTOCENE EVOLUTION OF SEA ICE, ICE SHEETS AND OCEAN CIRCULATION Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea Kara Sea Sea ice Stockholm University: Publications (DiVA) Arctic Arctic Ocean Barents Sea Kara Sea Journal of Geophysical Research 116 C9 |
institution |
Open Polar |
collection |
Stockholm University: Publications (DiVA) |
op_collection_id |
ftstockholmuniv |
language |
English |
topic |
sea ice Arctic Ocean sediment Geosciences Multidisciplinary Multidisciplinär geovetenskap |
spellingShingle |
sea ice Arctic Ocean sediment Geosciences Multidisciplinary Multidisciplinär geovetenskap Darby A., Dennis Myers, Wesley B. Jakobsson, Martin Rigor, Ignatius Modern dirty sea ice characteristics and sources : The role of anchor ice |
topic_facet |
sea ice Arctic Ocean sediment Geosciences Multidisciplinary Multidisciplinär geovetenskap |
description |
Extensive dirty ice patches with up to 7 kg m−2 sediment concentrations in layers of up to 10 cm thickness were encountered in 2005 and 2007 in numerous areas across the central Arctic. The Fe grain fingerprint determination of sources for these sampled dirty ice floes indicated both Russian and Canadian sources, with the latter dominating. The presence of benthic shells and sea weeds along with thick layers (2–10 cm) of sediment covering 5–10 m2 indicates an anchor ice entrainment origin as opposed to suspension freezing for some of these floes. The anchor ice origin might explain the dominance of Canadian sources where only narrow flaw leads occur that would not favor suspension freezing as an entrainment process. Expandable clays, commonly used as an indicator of a Kara Sea origin for dirty sea ice, are present in moderately high percentages (>20%) in many circum-Arctic source areas, including the Arctic coasts of North America. Some differences between the Russian and the North American coastal areas are found in clay mineral abundance, primarily the much higher abundance of chlorite in North America and the northern Barents Sea as opposed to the rest of the Russian Arctic. However, sea ice clay mineralogy matched many source areas, making it difficult to use as a provenance tool by itself. The bulk mineralogy (clay and non-clay) does not match specific sources possibly due to reworking of the sediment in dirty floes through summer melting or the failure to characterize all possible source areas. VR: THE ARCTIC OCEAN PLEISTOCENE EVOLUTION OF SEA ICE, ICE SHEETS AND OCEAN CIRCULATION |
format |
Article in Journal/Newspaper |
author |
Darby A., Dennis Myers, Wesley B. Jakobsson, Martin Rigor, Ignatius |
author_facet |
Darby A., Dennis Myers, Wesley B. Jakobsson, Martin Rigor, Ignatius |
author_sort |
Darby A., Dennis |
title |
Modern dirty sea ice characteristics and sources : The role of anchor ice |
title_short |
Modern dirty sea ice characteristics and sources : The role of anchor ice |
title_full |
Modern dirty sea ice characteristics and sources : The role of anchor ice |
title_fullStr |
Modern dirty sea ice characteristics and sources : The role of anchor ice |
title_full_unstemmed |
Modern dirty sea ice characteristics and sources : The role of anchor ice |
title_sort |
modern dirty sea ice characteristics and sources : the role of anchor ice |
publisher |
Institutionen för geologiska vetenskaper |
publishDate |
2011 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-67080 https://doi.org/10.1029/2010JC006675 |
geographic |
Arctic Arctic Ocean Barents Sea Kara Sea |
geographic_facet |
Arctic Arctic Ocean Barents Sea Kara Sea |
genre |
Arctic Arctic Ocean Barents Sea Kara Sea Sea ice |
genre_facet |
Arctic Arctic Ocean Barents Sea Kara Sea Sea ice |
op_relation |
Journal of Geophysical Research, 0148-0227, 2011, 116:C09008, http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-67080 doi:10.1029/2010JC006675 ISI:000295132300002 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2010JC006675 |
container_title |
Journal of Geophysical Research |
container_volume |
116 |
container_issue |
C9 |
_version_ |
1766315030627745792 |