Sortable silt cycles in Svalbard slope sediments 74-0 ka
ABSTRACT The grain size of sortable silt (SS, 10–63 μm) was studied in sediment core JM04‐025PC from a sediment drift on the lower part of the western Svalbard slope. The study aims to reconstruct the bottom current activity and intermediate water circulation in the Greenland Sea. The SS record cove...
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| Veröffentlicht in: | Journal of quaternary science 2015-11, Vol.30 (8), p.743-753 |
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| container_title | Journal of quaternary science |
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| creator | Jessen, Simon P. Rasmussen, Tine L. |
| description | ABSTRACT
The grain size of sortable silt (SS, 10–63 μm) was studied in sediment core JM04‐025PC from a sediment drift on the lower part of the western Svalbard slope. The study aims to reconstruct the bottom current activity and intermediate water circulation in the Greenland Sea. The SS record covers the last 74 ka and shows consistent millennial‐scale oscillations in grain size. The youngest part of the record ( |
| doi_str_mv | 10.1002/jqs.2807 |
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The grain size of sortable silt (SS, 10–63 μm) was studied in sediment core JM04‐025PC from a sediment drift on the lower part of the western Svalbard slope. The study aims to reconstruct the bottom current activity and intermediate water circulation in the Greenland Sea. The SS record covers the last 74 ka and shows consistent millennial‐scale oscillations in grain size. The youngest part of the record (<25 ka) is well correlated with the few available previously published reconstructions of grain size from the North Atlantic Ocean and the Nordic seas. Fining of SS occurs during four well‐known regional cold climatic intervals, the 8.2‐ka cold spell, the Younger Dryas and North Atlantic Heinrich Events H1 and H2, as well as during a local meltwater event at 14.4–14.7 ka, possibly coinciding with the Older Dryas. Also before 25 ka, grain size oscillated in pace with the Northern Hemisphere climate with finer grain sizes during cold periods and coarser grain sizes during warm periods. The fining of SS indicates reduced bottom current strength and reduced water exchange between the Greenland Sea and the Arctic Ocean during regional climate cooling events, and probably also reduced deep ocean convection in the Greenland Sea gyre.</description><identifier>ISSN: 0267-8179</identifier><identifier>EISSN: 1099-1417</identifier><identifier>DOI: 10.1002/jqs.2807</identifier><language>eng</language><publisher>Chichester: Blackwell Publishing Ltd</publisher><subject>bottom current strength ; Climate ; Dansgard/Oeschger climate variability ; Finings ; Fram Strait ; Grain size ; Greenland Sea ; Regional ; Sea currents ; Sediments ; Silts ; Slopes ; sortable silt</subject><ispartof>Journal of quaternary science, 2015-11, Vol.30 (8), p.743-753</ispartof><rights>Copyright © 2015 John Wiley & Sons, Ltd.</rights><rights>2015 John Wiley & Sons, Ltd.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a4577-22657604a1b6bf46332a92490d33d3fb9eaca60a40ca2299f2659c3f87f2e1113</citedby><cites>FETCH-LOGICAL-a4577-22657604a1b6bf46332a92490d33d3fb9eaca60a40ca2299f2659c3f87f2e1113</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fjqs.2807$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fjqs.2807$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,777,781,1412,27905,27906,45555,45556</link.rule.ids></links><search><creatorcontrib>Jessen, Simon P.</creatorcontrib><creatorcontrib>Rasmussen, Tine L.</creatorcontrib><title>Sortable silt cycles in Svalbard slope sediments 74-0 ka</title><title>Journal of quaternary science</title><addtitle>J. Quaternary Sci</addtitle><description>ABSTRACT
The grain size of sortable silt (SS, 10–63 μm) was studied in sediment core JM04‐025PC from a sediment drift on the lower part of the western Svalbard slope. The study aims to reconstruct the bottom current activity and intermediate water circulation in the Greenland Sea. The SS record covers the last 74 ka and shows consistent millennial‐scale oscillations in grain size. The youngest part of the record (<25 ka) is well correlated with the few available previously published reconstructions of grain size from the North Atlantic Ocean and the Nordic seas. Fining of SS occurs during four well‐known regional cold climatic intervals, the 8.2‐ka cold spell, the Younger Dryas and North Atlantic Heinrich Events H1 and H2, as well as during a local meltwater event at 14.4–14.7 ka, possibly coinciding with the Older Dryas. Also before 25 ka, grain size oscillated in pace with the Northern Hemisphere climate with finer grain sizes during cold periods and coarser grain sizes during warm periods. The fining of SS indicates reduced bottom current strength and reduced water exchange between the Greenland Sea and the Arctic Ocean during regional climate cooling events, and probably also reduced deep ocean convection in the Greenland Sea gyre.</description><subject>bottom current strength</subject><subject>Climate</subject><subject>Dansgard/Oeschger climate variability</subject><subject>Finings</subject><subject>Fram Strait</subject><subject>Grain size</subject><subject>Greenland Sea</subject><subject>Regional</subject><subject>Sea currents</subject><subject>Sediments</subject><subject>Silts</subject><subject>Slopes</subject><subject>sortable silt</subject><issn>0267-8179</issn><issn>1099-1417</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNp10M1Kw0AUBeBBFKxV8BECbtyk3vnPLKXYVtsqUsXlMEkmkHaatDNptW9vSkVRcHUX5-NwOQhdYuhhAHIzX4ceSUAeoQ4GpWLMsDxGHSBCxgmW6hSdhTAHaDMBHZTMat-Y1NkolK6Jsl3mbIjKKpptjUuNz6Pg6lWb2rxc2qoJkWQxRAtzjk4K44K9-Lpd9Dq4e-mP4snT8L5_O4kN41LGhAguBTCDU5EWTFBKjCJMQU5pTotUWZMZAYZBZghRqmi9ymiRyIJYjDHtoutD78rX640NjV6WIbPOmcrWm6BxAsASrkC29OoPndcbX7XfaSy55FwoIX4KM1-H4G2hV75cGr_TGPR-Qt1OqPcTtjQ-0PfS2d2_Tj88z377MjT249sbv9BCUsn12-NQj5PReMgHUz2ln-XtfgA</recordid><startdate>201511</startdate><enddate>201511</enddate><creator>Jessen, Simon P.</creator><creator>Rasmussen, Tine L.</creator><general>Blackwell Publishing Ltd</general><general>Wiley Subscription Services, Inc</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>7TG</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>KL.</scope><scope>KR7</scope><scope>SOI</scope></search><sort><creationdate>201511</creationdate><title>Sortable silt cycles in Svalbard slope sediments 74-0 ka</title><author>Jessen, Simon P. ; Rasmussen, Tine L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4577-22657604a1b6bf46332a92490d33d3fb9eaca60a40ca2299f2659c3f87f2e1113</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>bottom current strength</topic><topic>Climate</topic><topic>Dansgard/Oeschger climate variability</topic><topic>Finings</topic><topic>Fram Strait</topic><topic>Grain size</topic><topic>Greenland Sea</topic><topic>Regional</topic><topic>Sea currents</topic><topic>Sediments</topic><topic>Silts</topic><topic>Slopes</topic><topic>sortable silt</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jessen, Simon P.</creatorcontrib><creatorcontrib>Rasmussen, Tine L.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Environment Abstracts</collection><jtitle>Journal of quaternary science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jessen, Simon P.</au><au>Rasmussen, Tine L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Sortable silt cycles in Svalbard slope sediments 74-0 ka</atitle><jtitle>Journal of quaternary science</jtitle><addtitle>J. Quaternary Sci</addtitle><date>2015-11</date><risdate>2015</risdate><volume>30</volume><issue>8</issue><spage>743</spage><epage>753</epage><pages>743-753</pages><issn>0267-8179</issn><eissn>1099-1417</eissn><abstract>ABSTRACT
The grain size of sortable silt (SS, 10–63 μm) was studied in sediment core JM04‐025PC from a sediment drift on the lower part of the western Svalbard slope. The study aims to reconstruct the bottom current activity and intermediate water circulation in the Greenland Sea. The SS record covers the last 74 ka and shows consistent millennial‐scale oscillations in grain size. The youngest part of the record (<25 ka) is well correlated with the few available previously published reconstructions of grain size from the North Atlantic Ocean and the Nordic seas. Fining of SS occurs during four well‐known regional cold climatic intervals, the 8.2‐ka cold spell, the Younger Dryas and North Atlantic Heinrich Events H1 and H2, as well as during a local meltwater event at 14.4–14.7 ka, possibly coinciding with the Older Dryas. Also before 25 ka, grain size oscillated in pace with the Northern Hemisphere climate with finer grain sizes during cold periods and coarser grain sizes during warm periods. The fining of SS indicates reduced bottom current strength and reduced water exchange between the Greenland Sea and the Arctic Ocean during regional climate cooling events, and probably also reduced deep ocean convection in the Greenland Sea gyre.</abstract><cop>Chichester</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1002/jqs.2807</doi><tpages>11</tpages></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | bottom current strength Climate Dansgard/Oeschger climate variability Finings Fram Strait Grain size Greenland Sea Regional Sea currents Sediments Silts Slopes sortable silt |
| title | Sortable silt cycles in Svalbard slope sediments 74-0 ka |
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