Radiolarian relative abundance and opal and radiolarian accumulation rate from IODP Site 306-U1314
A high-resolution record of radiolarian assemblages from Site U1314 was studied to reconstruct hydrographic and climatic changes in the North Atlantic Ocean during the Mid-Pleistocene Transition period (1069–779 ka). Besides the faunal record, absolute accumulation of radiolarians and total biogenic...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.891191 2023-05-15T15:03:53+02:00 Radiolarian relative abundance and opal and radiolarian accumulation rate from IODP Site 306-U1314 Hernández-Almeida, Iván Bjorklund, Kjell R Sierro, Francisco Javier Filippelli, Gabriel M Cacho, Isabel 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 * MINIMUM ELEVATION: -2800.0 m * MAXIMUM ELEVATION: -2800.0 m 2018-06-18 text/tab-separated-values, 7243 data points https://doi.pangaea.de/10.1594/PANGAEA.891191 https://doi.org/10.1594/PANGAEA.891191 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.891191 https://doi.org/10.1594/PANGAEA.891191 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Hernández-Almeida, Iván; Bjorklund, Kjell R; Sierro, Francisco Javier; Filippelli, Gabriel M; Cacho, Isabel; Flores, José-Abel (2013): A high resolution opal and radiolarian record from the subpolar North Atlantic during the Mid-Pleistocene Transition (1069–779ka): Palaeoceanographic implications. Palaeogeography, Palaeoclimatology, Palaeoecology, 391, 49-70, https://doi.org/10.1016/j.palaeo.2011.05.049 306-U1314 Accumulation rate opal radiolarians Actinomma boreale Actinomma leptodermum Actinomma medianum AGE Botryostrobus auritus/australis COMPCORE Composite Core Cornutella profunda Cycladophora davisiana Druppatractus variabilis Exp306 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution Larcopyle buetschlii Larcopyle weddellium Larcospira minor Lithocampe platycephala Lithomelissa setosa Lithomelissa thoracites Lithomitra lineata North Atlantic North Atlantic Climate 2 Phorticium pylonium Porodiscus sp. Pseudodictyophimus gracilipes Spongodiscus spp. Spongopyle osculosa Spongotrochus glacialis Stichocorys seriata Stylochlamydium venustrum Stylodictya validispina Dataset 2018 ftpangaea https://doi.org/10.1594/PANGAEA.891191 https://doi.org/10.1016/j.palaeo.2011.05.049 2023-01-20T09:11:11Z A high-resolution record of radiolarian assemblages from Site U1314 was studied to reconstruct hydrographic and climatic changes in the North Atlantic Ocean during the Mid-Pleistocene Transition period (1069–779 ka). Besides the faunal record, absolute accumulation of radiolarians and total biogenic opal are used to determine changes in surface water productivity. Results show that the North Atlantic Arctic Front shifted back and forth repeatedly at a glacial/interglacial timescale, bringing the site under the influence of both cold Arctic (glacial), and much warmer Atlantic (interglacial) waters. During glacial intervals and “ice-rafted debris” (IRD) events, the deep-dwelling taxon Cycladophora davisiana was the greatest contributor of the radiolarian assemblage, suggesting cold surface conditions, melt-water discharge and changes in deep and intermediate circulation. Interglacial intervals were characterized by abundant shallow-dwelling taxa like Pseudodyctiophimus gracilipes and Lithomelissa setosa, increased opal accumulation, and higher radiolarian diversities, indicating a northward flow of warm Atlantic surface waters to the Site U1314 area. A marked change in the structure of the radiolarian assemblage occurred after MIS 22 (~ 860 ka), with large taxa differences between warm and cold periods, probably in response to changing ocean conditions due to the higher amplitude of glacial/interglacial changes as the dominant periodicity of high-latitude climate oscillations shifted from 41-kyr to 100-kyr. Thus, we conclude that the radiolarian assemblage from the North Atlantic have changed drastically along with variations in ocean circulation in response to orbital and millennial-scale climatic variations that occurred in the Early and Mid-Pleistocene. Dataset Arctic Atlantic Arctic Atlantic-Arctic North Atlantic 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 Accumulation rate opal radiolarians Actinomma boreale Actinomma leptodermum Actinomma medianum AGE Botryostrobus auritus/australis COMPCORE Composite Core Cornutella profunda Cycladophora davisiana Druppatractus variabilis Exp306 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution Larcopyle buetschlii Larcopyle weddellium Larcospira minor Lithocampe platycephala Lithomelissa setosa Lithomelissa thoracites Lithomitra lineata North Atlantic North Atlantic Climate 2 Phorticium pylonium Porodiscus sp. Pseudodictyophimus gracilipes Spongodiscus spp. Spongopyle osculosa Spongotrochus glacialis Stichocorys seriata Stylochlamydium venustrum Stylodictya validispina |
spellingShingle |
306-U1314 Accumulation rate opal radiolarians Actinomma boreale Actinomma leptodermum Actinomma medianum AGE Botryostrobus auritus/australis COMPCORE Composite Core Cornutella profunda Cycladophora davisiana Druppatractus variabilis Exp306 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution Larcopyle buetschlii Larcopyle weddellium Larcospira minor Lithocampe platycephala Lithomelissa setosa Lithomelissa thoracites Lithomitra lineata North Atlantic North Atlantic Climate 2 Phorticium pylonium Porodiscus sp. Pseudodictyophimus gracilipes Spongodiscus spp. Spongopyle osculosa Spongotrochus glacialis Stichocorys seriata Stylochlamydium venustrum Stylodictya validispina Hernández-Almeida, Iván Bjorklund, Kjell R Sierro, Francisco Javier Filippelli, Gabriel M Cacho, Isabel Flores, José-Abel Radiolarian relative abundance and opal and radiolarian accumulation rate from IODP Site 306-U1314 |
topic_facet |
306-U1314 Accumulation rate opal radiolarians Actinomma boreale Actinomma leptodermum Actinomma medianum AGE Botryostrobus auritus/australis COMPCORE Composite Core Cornutella profunda Cycladophora davisiana Druppatractus variabilis Exp306 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution Larcopyle buetschlii Larcopyle weddellium Larcospira minor Lithocampe platycephala Lithomelissa setosa Lithomelissa thoracites Lithomitra lineata North Atlantic North Atlantic Climate 2 Phorticium pylonium Porodiscus sp. Pseudodictyophimus gracilipes Spongodiscus spp. Spongopyle osculosa Spongotrochus glacialis Stichocorys seriata Stylochlamydium venustrum Stylodictya validispina |
description |
A high-resolution record of radiolarian assemblages from Site U1314 was studied to reconstruct hydrographic and climatic changes in the North Atlantic Ocean during the Mid-Pleistocene Transition period (1069–779 ka). Besides the faunal record, absolute accumulation of radiolarians and total biogenic opal are used to determine changes in surface water productivity. Results show that the North Atlantic Arctic Front shifted back and forth repeatedly at a glacial/interglacial timescale, bringing the site under the influence of both cold Arctic (glacial), and much warmer Atlantic (interglacial) waters. During glacial intervals and “ice-rafted debris” (IRD) events, the deep-dwelling taxon Cycladophora davisiana was the greatest contributor of the radiolarian assemblage, suggesting cold surface conditions, melt-water discharge and changes in deep and intermediate circulation. Interglacial intervals were characterized by abundant shallow-dwelling taxa like Pseudodyctiophimus gracilipes and Lithomelissa setosa, increased opal accumulation, and higher radiolarian diversities, indicating a northward flow of warm Atlantic surface waters to the Site U1314 area. A marked change in the structure of the radiolarian assemblage occurred after MIS 22 (~ 860 ka), with large taxa differences between warm and cold periods, probably in response to changing ocean conditions due to the higher amplitude of glacial/interglacial changes as the dominant periodicity of high-latitude climate oscillations shifted from 41-kyr to 100-kyr. Thus, we conclude that the radiolarian assemblage from the North Atlantic have changed drastically along with variations in ocean circulation in response to orbital and millennial-scale climatic variations that occurred in the Early and Mid-Pleistocene. |
format |
Dataset |
author |
Hernández-Almeida, Iván Bjorklund, Kjell R Sierro, Francisco Javier Filippelli, Gabriel M Cacho, Isabel Flores, José-Abel |
author_facet |
Hernández-Almeida, Iván Bjorklund, Kjell R Sierro, Francisco Javier Filippelli, Gabriel M Cacho, Isabel Flores, José-Abel |
author_sort |
Hernández-Almeida, Iván |
title |
Radiolarian relative abundance and opal and radiolarian accumulation rate from IODP Site 306-U1314 |
title_short |
Radiolarian relative abundance and opal and radiolarian accumulation rate from IODP Site 306-U1314 |
title_full |
Radiolarian relative abundance and opal and radiolarian accumulation rate from IODP Site 306-U1314 |
title_fullStr |
Radiolarian relative abundance and opal and radiolarian accumulation rate from IODP Site 306-U1314 |
title_full_unstemmed |
Radiolarian relative abundance and opal and radiolarian accumulation rate from IODP Site 306-U1314 |
title_sort |
radiolarian relative abundance and opal and radiolarian accumulation rate from iodp site 306-u1314 |
publisher |
PANGAEA |
publishDate |
2018 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.891191 https://doi.org/10.1594/PANGAEA.891191 |
op_coverage |
LATITUDE: 56.364000 * LONGITUDE: -27.888000 * DATE/TIME START: 2005-04-07T00:00:00 * DATE/TIME END: 2005-04-10T00:00:00 * MINIMUM ELEVATION: -2800.0 m * MAXIMUM ELEVATION: -2800.0 m |
long_lat |
ENVELOPE(-27.888000,-27.888000,56.364000,56.364000) |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Atlantic Arctic Atlantic-Arctic North Atlantic |
genre_facet |
Arctic Atlantic Arctic Atlantic-Arctic North Atlantic |
op_source |
Supplement to: Hernández-Almeida, Iván; Bjorklund, Kjell R; Sierro, Francisco Javier; Filippelli, Gabriel M; Cacho, Isabel; Flores, José-Abel (2013): A high resolution opal and radiolarian record from the subpolar North Atlantic during the Mid-Pleistocene Transition (1069–779ka): Palaeoceanographic implications. Palaeogeography, Palaeoclimatology, Palaeoecology, 391, 49-70, https://doi.org/10.1016/j.palaeo.2011.05.049 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.891191 https://doi.org/10.1594/PANGAEA.891191 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.891191 https://doi.org/10.1016/j.palaeo.2011.05.049 |
_version_ |
1766335734656008192 |