North Atlantic surface ocean 14C variability between 30 – 40 kyr. BP
The Faroe-Shetland channel is situated in the main path of the inflow of warm North Atlantic surface water to the Nordic seas and further provides an escape route for the cold Norwegian Sea Deep Water. AMS 14C dates of planktonic foraminifera covering Marine Isotope Stage 3 from two cores in the Far...
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ftqueensubelpubl:oai:pure.qub.ac.uk/portal:publications/43d4ca7d-06b3-4baa-90d9-4c5b6ca96de5 2023-05-15T16:29:46+02:00 North Atlantic surface ocean 14C variability between 30 – 40 kyr. BP Olsen, Jesper Inceoglu, Fadil Singarayer, Joy Rasmussen, Tine Reimer, Paula 2014-08-21 https://pure.qub.ac.uk/en/publications/43d4ca7d-06b3-4baa-90d9-4c5b6ca96de5 http://www.qub.ac.uk/sites/14C/ConferenceProgramme/ eng eng info:eu-repo/semantics/restrictedAccess Olsen , J , Inceoglu , F , Singarayer , J , Rasmussen , T & Reimer , P 2014 , ' North Atlantic surface ocean 14C variability between 30 – 40 kyr. BP ' , Paper presented at Radiocarbon in the Environment 2014 , Belfast , United Kingdom , 18/08/2014 - 22/08/2014 . < http://www.qub.ac.uk/sites/14C/ConferenceProgramme/ > radiocarbon Ocean dynamics /dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water conferenceObject 2014 ftqueensubelpubl 2023-01-12T23:19:35Z The Faroe-Shetland channel is situated in the main path of the inflow of warm North Atlantic surface water to the Nordic seas and further provides an escape route for the cold Norwegian Sea Deep Water. AMS 14C dates of planktonic foraminifera covering Marine Isotope Stage 3 from two cores in the Faroe-Shetland channel will be used to trace past variability of the Atlantic Meridional Overturning Circulation (AMOC). The reservoir age R shows considerable variability ranging between 50 to 2750 14C years. In particular high R values are observed during Heinrich event 4 (H4) with values around 1550 14C years and during the Laschamp magnetic excursion with R values as high as 2700 14C years. The period between Greenland interstadial 8 (GI8) and GI5 show highly variable R values with interstadial R values around 500 – 650 14C years, i.e. slightly higher than ‘normal’, whereas stadials show either significantly higher or lower R values. From GI5 towards the Last Glacial Maximum R values are generally around 1000 14C years or higher. Using magnetic susceptibility, IRD and δ13C and δ18O values measured on the planktic foraminifera species Neogloboquadrina pachyderma, we compare the observed R variability with reconstructed changes in the Atlantic Meridional Overturning Circulation (AMOC). Furthermore a climate model of intermediate complexity (GENIE) including 14C is used as conceptual tool for identifying oceanographic configuration explaining the observed R variability. Conference Object Greenland Neogloboquadrina pachyderma Nordic Seas North Atlantic Norwegian Sea Planktonic foraminifera Queen's University Belfast Research Portal Greenland Norwegian Sea |
institution |
Open Polar |
collection |
Queen's University Belfast Research Portal |
op_collection_id |
ftqueensubelpubl |
language |
English |
topic |
radiocarbon Ocean dynamics /dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water |
spellingShingle |
radiocarbon Ocean dynamics /dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water Olsen, Jesper Inceoglu, Fadil Singarayer, Joy Rasmussen, Tine Reimer, Paula North Atlantic surface ocean 14C variability between 30 – 40 kyr. BP |
topic_facet |
radiocarbon Ocean dynamics /dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water |
description |
The Faroe-Shetland channel is situated in the main path of the inflow of warm North Atlantic surface water to the Nordic seas and further provides an escape route for the cold Norwegian Sea Deep Water. AMS 14C dates of planktonic foraminifera covering Marine Isotope Stage 3 from two cores in the Faroe-Shetland channel will be used to trace past variability of the Atlantic Meridional Overturning Circulation (AMOC). The reservoir age R shows considerable variability ranging between 50 to 2750 14C years. In particular high R values are observed during Heinrich event 4 (H4) with values around 1550 14C years and during the Laschamp magnetic excursion with R values as high as 2700 14C years. The period between Greenland interstadial 8 (GI8) and GI5 show highly variable R values with interstadial R values around 500 – 650 14C years, i.e. slightly higher than ‘normal’, whereas stadials show either significantly higher or lower R values. From GI5 towards the Last Glacial Maximum R values are generally around 1000 14C years or higher. Using magnetic susceptibility, IRD and δ13C and δ18O values measured on the planktic foraminifera species Neogloboquadrina pachyderma, we compare the observed R variability with reconstructed changes in the Atlantic Meridional Overturning Circulation (AMOC). Furthermore a climate model of intermediate complexity (GENIE) including 14C is used as conceptual tool for identifying oceanographic configuration explaining the observed R variability. |
format |
Conference Object |
author |
Olsen, Jesper Inceoglu, Fadil Singarayer, Joy Rasmussen, Tine Reimer, Paula |
author_facet |
Olsen, Jesper Inceoglu, Fadil Singarayer, Joy Rasmussen, Tine Reimer, Paula |
author_sort |
Olsen, Jesper |
title |
North Atlantic surface ocean 14C variability between 30 – 40 kyr. BP |
title_short |
North Atlantic surface ocean 14C variability between 30 – 40 kyr. BP |
title_full |
North Atlantic surface ocean 14C variability between 30 – 40 kyr. BP |
title_fullStr |
North Atlantic surface ocean 14C variability between 30 – 40 kyr. BP |
title_full_unstemmed |
North Atlantic surface ocean 14C variability between 30 – 40 kyr. BP |
title_sort |
north atlantic surface ocean 14c variability between 30 – 40 kyr. bp |
publishDate |
2014 |
url |
https://pure.qub.ac.uk/en/publications/43d4ca7d-06b3-4baa-90d9-4c5b6ca96de5 http://www.qub.ac.uk/sites/14C/ConferenceProgramme/ |
geographic |
Greenland Norwegian Sea |
geographic_facet |
Greenland Norwegian Sea |
genre |
Greenland Neogloboquadrina pachyderma Nordic Seas North Atlantic Norwegian Sea Planktonic foraminifera |
genre_facet |
Greenland Neogloboquadrina pachyderma Nordic Seas North Atlantic Norwegian Sea Planktonic foraminifera |
op_source |
Olsen , J , Inceoglu , F , Singarayer , J , Rasmussen , T & Reimer , P 2014 , ' North Atlantic surface ocean 14C variability between 30 – 40 kyr. BP ' , Paper presented at Radiocarbon in the Environment 2014 , Belfast , United Kingdom , 18/08/2014 - 22/08/2014 . < http://www.qub.ac.uk/sites/14C/ConferenceProgramme/ > |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766019476016332800 |