Age model and ostracod countings from IODP Site 306-U1314
We present a detailed study of glacial/interglacial deep sea benthic ostracod assemblage variability at IODP Site U1314 (subpolar North Atlantic) in relation to the history of ice-rafting events and changes in deep ocean circulation over the past 170 ky. Our records of ostracod diversity, abundance...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.763283 2023-05-15T15:14:52+02:00 Age model and ostracod countings from IODP Site 306-U1314 Alvarez Zarikian, Carlos A Stepanova, Anna Yu Gruetzner, Jens LATITUDE: 56.364000 * LONGITUDE: -27.888000 * DATE/TIME START: 2005-04-07T00:00:00 * DATE/TIME END: 2005-04-10T00:00:00 2009-07-20 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.763283 https://doi.org/10.1594/PANGAEA.763283 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.763283 https://doi.org/10.1594/PANGAEA.763283 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Alvarez Zarikian, Carlos A; Stepanova, Anna Yu; Gruetzner, Jens (2009): Glacial-interglacial variability in deep sea ostracod assemblage composition at IODP Site U1314 in the subpolar North Atlantic. Marine Geology, 258(1-4), 69-87, https://doi.org/10.1016/j.margeo.2008.11.009 306-U1314 COMPCORE Composite Core Exp306 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Joides Resolution North Atlantic North Atlantic Climate 2 Dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.763283 https://doi.org/10.1016/j.margeo.2008.11.009 2023-01-20T07:32:14Z We present a detailed study of glacial/interglacial deep sea benthic ostracod assemblage variability at IODP Site U1314 (subpolar North Atlantic) in relation to the history of ice-rafting events and changes in deep ocean circulation over the past 170 ky. Our records of ostracod diversity, abundance and dissolution and sediment properties (IRD and CaCO3) show an excellent correspondence to high amplitude orbital and millennial variability observed in the climate records (d13C and d18O) from neighboring deep water sites, suggesting that the benthic meiofauna fluctuates synchronously with the prevailing oceanographic conditions (surface ocean conditions, deep ocean circulation and water temperature and food flux). Krithe (dominant), Argilloecia and Cytheropteron are the most abundant and diverse genera in association with Rockallia enigmatica. Three ostracod assemblages are recognized. The genera Pennyella, Argilloecia, Pelecocythere, Ambocythere, Pseudobosquetina, Bradleya and Nannocythere are associated with interglacials and interstadials, and possibly reflect increased flux of food to the sediments and more vigorous NADW formation. A transitional assemblage composed of species of Cytheropteron, Xestoleberis and Eucythere is restricted to climatic transitions and indicate moderate environmental conditions and seasonal productivity. A glacial/stadial assemblage is characterized by a temporal predominance of either intermediate-depth and shallow water Arctic/subarctic species (belonging to Cytheropteron, Polycope, Pedicythere, Swainocythere, Cluthia, Heterocyprideis, Elofsonella and Finmarchinella) or abyssal North Atlantic ostracods (Bythocythere, Dutoitella, Bathycythere and Bythocypris). The influx of high latitude taxa can be partially explained by ice-rafting, but may also represent a shift of the location of intermediate and deep water convection to the area south of Iceland. Therefore the combination of species characteristic of different watermasses during glacials may reflect shifts in the influence of ... Dataset Arctic Iceland NADW North Atlantic Subarctic 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 Alvarez Zarikian, Carlos A Stepanova, Anna Yu Gruetzner, Jens Age model and ostracod countings from 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 |
We present a detailed study of glacial/interglacial deep sea benthic ostracod assemblage variability at IODP Site U1314 (subpolar North Atlantic) in relation to the history of ice-rafting events and changes in deep ocean circulation over the past 170 ky. Our records of ostracod diversity, abundance and dissolution and sediment properties (IRD and CaCO3) show an excellent correspondence to high amplitude orbital and millennial variability observed in the climate records (d13C and d18O) from neighboring deep water sites, suggesting that the benthic meiofauna fluctuates synchronously with the prevailing oceanographic conditions (surface ocean conditions, deep ocean circulation and water temperature and food flux). Krithe (dominant), Argilloecia and Cytheropteron are the most abundant and diverse genera in association with Rockallia enigmatica. Three ostracod assemblages are recognized. The genera Pennyella, Argilloecia, Pelecocythere, Ambocythere, Pseudobosquetina, Bradleya and Nannocythere are associated with interglacials and interstadials, and possibly reflect increased flux of food to the sediments and more vigorous NADW formation. A transitional assemblage composed of species of Cytheropteron, Xestoleberis and Eucythere is restricted to climatic transitions and indicate moderate environmental conditions and seasonal productivity. A glacial/stadial assemblage is characterized by a temporal predominance of either intermediate-depth and shallow water Arctic/subarctic species (belonging to Cytheropteron, Polycope, Pedicythere, Swainocythere, Cluthia, Heterocyprideis, Elofsonella and Finmarchinella) or abyssal North Atlantic ostracods (Bythocythere, Dutoitella, Bathycythere and Bythocypris). The influx of high latitude taxa can be partially explained by ice-rafting, but may also represent a shift of the location of intermediate and deep water convection to the area south of Iceland. Therefore the combination of species characteristic of different watermasses during glacials may reflect shifts in the influence of ... |
format |
Dataset |
author |
Alvarez Zarikian, Carlos A Stepanova, Anna Yu Gruetzner, Jens |
author_facet |
Alvarez Zarikian, Carlos A Stepanova, Anna Yu Gruetzner, Jens |
author_sort |
Alvarez Zarikian, Carlos A |
title |
Age model and ostracod countings from IODP Site 306-U1314 |
title_short |
Age model and ostracod countings from IODP Site 306-U1314 |
title_full |
Age model and ostracod countings from IODP Site 306-U1314 |
title_fullStr |
Age model and ostracod countings from IODP Site 306-U1314 |
title_full_unstemmed |
Age model and ostracod countings from IODP Site 306-U1314 |
title_sort |
age model and ostracod countings from iodp site 306-u1314 |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.763283 https://doi.org/10.1594/PANGAEA.763283 |
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 Iceland NADW North Atlantic Subarctic |
genre_facet |
Arctic Iceland NADW North Atlantic Subarctic |
op_source |
Supplement to: Alvarez Zarikian, Carlos A; Stepanova, Anna Yu; Gruetzner, Jens (2009): Glacial-interglacial variability in deep sea ostracod assemblage composition at IODP Site U1314 in the subpolar North Atlantic. Marine Geology, 258(1-4), 69-87, https://doi.org/10.1016/j.margeo.2008.11.009 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.763283 https://doi.org/10.1594/PANGAEA.763283 |
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.763283 https://doi.org/10.1016/j.margeo.2008.11.009 |
_version_ |
1766345274751451136 |