Benthic foraminifera in the marginal Arctic Ocean

DOI

Analyses of benthic foraminifera in sediment cores taken at about 1000 m water depth at the Yermak Plateau and the Barents Sea slope, adjacent to the position of the ice-sheet edge during the Last Glacial Maximum, show that paleoproductivity was reduced to about a third of its present level during peak glacial stadials. These reduced values are still higher than values for modern, permanently ice-covered regions, suggesting that the core locations were at least partially ice-free even during stadials. Paleoproductivity at the core locations was higher than or equal to that of today during initial deglaciations and warm substages. Peak paleoproductivity occurred in samples with low-salinity surface waters as indicated by oxygen isotope values of planktonic foraminifera, and slightly after increased abundance of 'Atlantic species', suggesting that enhanced advection of warmer waters from the Atlantic supported the initial ice-sheet retreat. During the Holocene Climatic Optimum productivity was much less than at present on the Yermak Plateau, high at the Barents Sea site, perhaps because of increased advection of Atlantic water to the latter site and heavier ice coverage at the former. After this optimum, paleoproductivity at both sites was similar, with slightly lower values during cold periods such as the Little Ice Age.

Age determination of sediment core PS2138-1: doi:10.1594/PANGAEA.66865; Age determination of sediment core PS2837-5: doi:10.1594/PANGAEA.66867

Supplement to: Wollenburg, Jutta Erika; Knies, Jochen; Mackensen, Andreas (2004): High-resolution palaeoproductivity fluctuations during the past 24 kyr as indicated by benthic foraminifera in the marginal Arctic Ocean. Palaeogeography, Palaeoclimatology, Palaeoecology, 204(3-4), 209-238

Identifier
DOI https://doi.org/10.1594/PANGAEA.728235
Related Identifier https://doi.org/10.1016/S0031-0182(03)00726-0
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.728235
Provenance
Creator Wollenburg, Jutta Erika ORCID logo; Knies, Jochen; Mackensen, Andreas ORCID logo
Publisher PANGAEA
Publication Year 2004
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 7 datasets
Discipline Earth System Research
Spatial Coverage (-14.369W, 79.695S, 159.167E, 90.000N); Svalbard; Nansen Basin; Gakkel Ridge, Arctic Ocean; Amundsen Basin; Lomonosov Ridge, Arctic Ocean; Makarov Basin; Morris Jesup Rise; Yermak Plateau; Barents Sea; W Spitzbergen
Temporal Coverage Begin 1991-07-08T18:59:00Z
Temporal Coverage End 1997-07-15T19:07:00Z