Abundance and opal input of radiolarian species of two sediment cores from the Atlantic sector of the Southern Ocean

Radiolarian-based paleoceanographic reconstructions generally use the abundance of selected radiolarian species. However, the recent focus on the opal flux and the development of isotope measurements in biogenic opal and the organic matter embedded in it demands a better knowledge of the origin of t...

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Bibliographic Details
Main Authors: Jacot des Combes, Hélène, Abelmann, Andrea
Format: Dataset
Language:English
Published: PANGAEA 2009
Subjects:
ANT-VIII/3
ANT-XI/2
AWI_Paleo
Gravity corer (Kiel type)
Paleoenvironmental Reconstructions from Marine Sediments @ AWI
Polarstern
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
PS16
PS16/311
PS1768-8
PS2498-1
PS28
PS28/304
Shona Ridge
SL
South Atlantic
SPP1158
Arctic
Antarctic
Southern Ocean
Antarc*
Sea ice
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.734967
https://doi.org/10.1594/PANGAEA.734967
Description
Summary:Radiolarian-based paleoceanographic reconstructions generally use the abundance of selected radiolarian species. However, the recent focus on the opal flux and the development of isotope measurements in biogenic opal and the organic matter embedded in it demands a better knowledge of the origin of the opal. We present here an estimation of the opal content of the skeleton of 63 radiolarian species from two sites in the Southern Ocean. The skeletons are modelled as associations of simple geometrical shapes, and the volume thus obtained is combined with opal density to obtain the amount of opal. These data are, thus, used to determine the most important opal carriers in the radiolarian assemblage in both cores.

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