Planktonic foraminifera of IODP Site 306-U1314
Surface water conditions at the Integrated Ocean Drilling Program (IODP) Site U1314 (Southern Gardar Drift, 56° 21.8' N, 27° 53.3' W, 2820 m depth) were inferred using planktic foraminifer assemblages between Marine Isotope Stage (MIS) 19 and 11 (ca. 800-400 ka). Factor analysis of the pla...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.775846 2024-06-23T07:48:35+00:00 Planktonic foraminifera of IODP Site 306-U1314 Alonso-Garcia, Montserrat Sierro, Francisco Javier Flores, José-Abel LATITUDE: 56.364000 * LONGITUDE: -27.888000 * DATE/TIME START: 2005-04-07T00:00:00 * DATE/TIME END: 2005-04-10T00:00:00 2011 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.775846 https://doi.org/10.1594/PANGAEA.775846 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.775846 https://doi.org/10.1594/PANGAEA.775846 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Alonso-Garcia, Montserrat; Sierro, Francisco Javier; Flores, José-Abel (2011): Arctic front shifts in the subpolar North Atlantic during the Mid-Pleistocene (800–400 ka) and their implications for ocean circulation. Palaeogeography, Palaeoclimatology, Palaeoecology, 311(3-4), 268-280, https://doi.org/10.1016/j.palaeo.2011.09.004 306-U1314 COMPCORE Composite Core Exp306 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution North Atlantic North Atlantic Climate 2 Dataset 2011 ftpangaea https://doi.org/10.1594/PANGAEA.77584610.1016/j.palaeo.2011.09.004 2024-06-12T14:17:12Z Surface water conditions at the Integrated Ocean Drilling Program (IODP) Site U1314 (Southern Gardar Drift, 56° 21.8' N, 27° 53.3' W, 2820 m depth) were inferred using planktic foraminifer assemblages between Marine Isotope Stage (MIS) 19 and 11 (ca. 800-400 ka). Factor analysis of the planktic foraminifer assemblages suggests that the assemblage was controlled by three factors. The first factor (which explained 49% of the variance) is dominated by transitional and subpolar species and points to warm and salty surface water conditions (Atlantic water). The second factor (37%) is dominated by Neogloboquadrina pachyderma sin and has been associated with the presence of cold and low saline surface waters (Arctic water). Finally, the third factor (9%), linked to a significant presence of Turborotalita quinqueloba, reflects the closeness of the Arctic front (the boundary between Atlantic and Arctic water). The position of the Arctic and Polar fronts has been estimated across the glacial-interglacial cycles studied according to planktic foraminifer abundances from Site U1314 (and their factor analysis) combined with a synthesis of planktic foraminifer and diatom data from other North Atlantic sites. Regarding at the migrations of the Arctic front and the surface water masses distribution across each climatic cycle we determined five phases of development. Furthermore, deep ocean circulation changes observed in glacial-interglacial cycles have been associated with each phase. The high abundance of transitional-subpolar foraminifers (above 65% at Site U1314) during the early interglacial phase indicated that the Arctic front position and surface water masses distribution were similar to present conditions. During the late interglacial phase, N. pachyderma sin and T. quinqueloba slightly increased indicating that winter sea ice slightly expanded southwestwards whereas the ice volume remained stable or was still decreasing. N. pachyderma sin increased rapidly (above 65% at Site U1314) at the first phase of glacial periods ... Dataset Arctic Arctic Foraminifera* Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Arctic ENVELOPE(-27.888000,-27.888000,56.364000,56.364000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
306-U1314 COMPCORE Composite Core Exp306 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution North Atlantic North Atlantic Climate 2 |
spellingShingle |
306-U1314 COMPCORE Composite Core Exp306 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution North Atlantic North Atlantic Climate 2 Alonso-Garcia, Montserrat Sierro, Francisco Javier Flores, José-Abel Planktonic foraminifera of IODP Site 306-U1314 |
topic_facet |
306-U1314 COMPCORE Composite Core Exp306 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution North Atlantic North Atlantic Climate 2 |
description |
Surface water conditions at the Integrated Ocean Drilling Program (IODP) Site U1314 (Southern Gardar Drift, 56° 21.8' N, 27° 53.3' W, 2820 m depth) were inferred using planktic foraminifer assemblages between Marine Isotope Stage (MIS) 19 and 11 (ca. 800-400 ka). Factor analysis of the planktic foraminifer assemblages suggests that the assemblage was controlled by three factors. The first factor (which explained 49% of the variance) is dominated by transitional and subpolar species and points to warm and salty surface water conditions (Atlantic water). The second factor (37%) is dominated by Neogloboquadrina pachyderma sin and has been associated with the presence of cold and low saline surface waters (Arctic water). Finally, the third factor (9%), linked to a significant presence of Turborotalita quinqueloba, reflects the closeness of the Arctic front (the boundary between Atlantic and Arctic water). The position of the Arctic and Polar fronts has been estimated across the glacial-interglacial cycles studied according to planktic foraminifer abundances from Site U1314 (and their factor analysis) combined with a synthesis of planktic foraminifer and diatom data from other North Atlantic sites. Regarding at the migrations of the Arctic front and the surface water masses distribution across each climatic cycle we determined five phases of development. Furthermore, deep ocean circulation changes observed in glacial-interglacial cycles have been associated with each phase. The high abundance of transitional-subpolar foraminifers (above 65% at Site U1314) during the early interglacial phase indicated that the Arctic front position and surface water masses distribution were similar to present conditions. During the late interglacial phase, N. pachyderma sin and T. quinqueloba slightly increased indicating that winter sea ice slightly expanded southwestwards whereas the ice volume remained stable or was still decreasing. N. pachyderma sin increased rapidly (above 65% at Site U1314) at the first phase of glacial periods ... |
format |
Dataset |
author |
Alonso-Garcia, Montserrat Sierro, Francisco Javier Flores, José-Abel |
author_facet |
Alonso-Garcia, Montserrat Sierro, Francisco Javier Flores, José-Abel |
author_sort |
Alonso-Garcia, Montserrat |
title |
Planktonic foraminifera of IODP Site 306-U1314 |
title_short |
Planktonic foraminifera of IODP Site 306-U1314 |
title_full |
Planktonic foraminifera of IODP Site 306-U1314 |
title_fullStr |
Planktonic foraminifera of IODP Site 306-U1314 |
title_full_unstemmed |
Planktonic foraminifera of IODP Site 306-U1314 |
title_sort |
planktonic foraminifera of iodp site 306-u1314 |
publisher |
PANGAEA |
publishDate |
2011 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.775846 https://doi.org/10.1594/PANGAEA.775846 |
op_coverage |
LATITUDE: 56.364000 * LONGITUDE: -27.888000 * DATE/TIME START: 2005-04-07T00:00:00 * DATE/TIME END: 2005-04-10T00:00:00 |
long_lat |
ENVELOPE(-27.888000,-27.888000,56.364000,56.364000) |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Foraminifera* Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera Sea ice |
genre_facet |
Arctic Arctic Foraminifera* Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera Sea ice |
op_source |
Supplement to: Alonso-Garcia, Montserrat; Sierro, Francisco Javier; Flores, José-Abel (2011): Arctic front shifts in the subpolar North Atlantic during the Mid-Pleistocene (800–400 ka) and their implications for ocean circulation. Palaeogeography, Palaeoclimatology, Palaeoecology, 311(3-4), 268-280, https://doi.org/10.1016/j.palaeo.2011.09.004 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.775846 https://doi.org/10.1594/PANGAEA.775846 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.77584610.1016/j.palaeo.2011.09.004 |
_version_ |
1802638949214060544 |