Quaternary paleoceanography of the deep Arctic Ocean based on quantitative analysis of Ostracoda
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Abstract
Ostracodes were studied from deep Arctic Ocean cores obtained during the Arctic 91 expedition of the Polarstern to the Nansen, Amundsen and Makarov Basins, the Lomonosov Ridge, Morris Jesup Rise and Yermak Plateau, in order to investigate their distribution in Arctic Ocean deep water (AODW) and apply these data to paleoceanographic reconstruction of bottom water masses during the Quaternary. Analyses of coretop assemblages from Arctic 91 boxcores indicate the following: ostracodes are common at all depths between 1000 and 4500 m, and species distribution is strongly influenced by water mass characteristics and bathymetry; quantitative analyses comparing Eurasian and Canada Basin assemblages indicate that distinct assemblages inhabit regions east and west of the Lomonosov Ridge, a barrier especially important to species living in lower AODW; deep Eurasian Basin assemblages are more similar to those living in Greenland Sea deep water (GSDW) than those in Canada Basin deep water; two upper AODW assemblages were recognized throughout the Arctic Ocean, one living between 1000 and 1500 m, and the other, having high species diversity, at 1500–3000 m.
Publication type | Article |
---|---|
Publication Subtype | Journal Article |
Title | Quaternary paleoceanography of the deep Arctic Ocean based on quantitative analysis of Ostracoda |
Series title | Marine Geology |
DOI | 10.1016/0025-3227(94)90188-0 |
Volume | 119 |
Issue | 3-4 |
Year Published | 1994 |
Language | English |
Publisher | Elsevier |
Description | 28 p. |
First page | 305 |
Last page | 332 |
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