PANGAEA_963219
Coccolith species abundances in ODP Hole 162-984C from the subpolar North Atlantic Ocean for the past 24 ka
Baumann, Karl-Heinz
Coccolith species abundances in ODP Hole 162-984C from the subpolar North Atlantic Ocean for the past 24 ka
2024-04-15
PANGAEA
Dataset
https://doi.pangaea.de/10.1594/PANGAEA.963219
Investigator
Karl-Heinz
Baumann
baumann@uni-bremen.de
Earth Science
DEPTH, sediment/rock
Sample code/label
AGE
Acanthoica quattrospina
Algirosphaera robusta
Calcidiscus leptoporus ssp. leptoporus
Calcidiscus leptoporus ssp. quadriperforatus
Calciosolenia brasiliensis
Coccolithus pelagicus ssp. pelagicus
Coccolithus pelagicus ssp. braarudii
Coronosphaera mediterranea
Emiliania huxleyi
Florisphaera profunda
Gladiolithus flabellatus
Gephyrocapsa ericsonii
Gephyrocapsa muellerae
Gephyrocapsa oceanica
Hayaster perplexus
Helicosphaera carteri
Helicosphaera wallichii
Oolithotus antillarum
Oolithotus fragilis
Ophiaster hydroideus
Papposphaera spp.
Pontosphaera discopora
Pontosphaera spp.
Rhabdosphaera clavigera
Reticulofenestra sessilis
Syracosphaera pulchra
Syracosphaera sp.
Umbilicosphaera foliosa
Umbilicosphaera sibogae
Umbilicosphaera hulburtiana
Umbellosphaera tenuis
Umbellosphaera irregularis
Umbellosphaera sp.
Coccoliths indeterminata
Sample mass
Split factor
Magnification
Frame width
Transect length
Scanned area
Filter, area
Acanthoica quattrospina
Algirosphaera robusta
Calcidiscus leptoporus ssp. leptoporus
Calcidiscus leptoporus ssp. quadriperforatus
Calciosolenia brasiliensis
Coccolithus pelagicus ssp. pelagicus
Coccolithus pelagicus ssp. braarudii
Coronosphaera mediterranea
Emiliania huxleyi
Florisphaera profunda
Gladiolithus flabellatus
Gephyrocapsa ericsonii
Gephyrocapsa muellerae
Gephyrocapsa oceanica
Hayaster perplexus
Helicosphaera carteri
Helicosphaera wallichii
Oolithotus antillarum
Oolithotus fragilis
Ophiaster hydroideus
Papposphaera spp.
Pontosphaera discopora
Pontosphaera spp.
Rhabdosphaera clavigera
Reticulofenestra sessilis
Syracosphaera pulchra
Syracosphaera sp.
Umbilicosphaera foliosa
Umbilicosphaera sibogae
Umbilicosphaera hulburtiana
Umbellosphaera tenuis
Umbellosphaera irregularis
Umbellosphaera sp.
Coccoliths indeterminata, per unit sediment mass
geoscientificInformation
162-984C
Assemblages
coccolith abundances
Coccolithophores
Drilling/drill rig
Leg162
North Atlantic
ODP
IODP Depth Scale Terminology
DSDP/ODP/IODP sample designation
Scanning electron microscope (SEM), Zeiss, DSM 940A
Joides Resolution
1995-07-28
1995-07-29
Complete
61.4253
61.4253
-24.0825
-24.0825
0.01 m (DEPTH, sediment/rock)
4.45 m (DEPTH, sediment/rock)
unrestricted
CC-BY-4.0: Creative Commons Attribution 4.0 International
English
PANGAEA
Data Publisher for Earth & Environmental Science
https://www.pangaea.de/
Data Center Contact
Michael
Diepenbroek
info@pangaea.de
Leobener Str.
Bremen
Bremen
28359
Germany
online
4290 data points
text/tab-separated-values
Coccolithophore assemblage data from sediment core 162-984C from the subpolar North Atlantic ocean spanning the past 24 ka. The assemblage data were used to assess changes in biodiversity and assemblage composition during the past 24 ka, i.e., from the Last Glacial Maximum (LGM) to the current warm period covering the last deglaciation.
Samples were analysed at 2-32 cm intervals and were prepared using a combined dilution/filtering technique as described by Andruleit (1996, doi:10.2307/1485964). Between 50 and 150 mg of dry bulk sediment was brought into suspension using demineralized water buffered with ammonia (pH ~ 8.5-9). The suspension was ultrasonicated for 15 to 30 s, split (split factor = 100) using a rotary splitter and filtered onto polycarbonate membrane filters (0.4 µm pore size) using a vacuum pump. Samples were dried at 40°C for 24 h before ~1x1 cm filter aliquots were mounted on an aluminium stub that was prepared with electroconductive, self-adhesive, carbon-based discs (PLANO Leit tabs). The mounted samples were sputtered with gold/palladium in a Polaron SC7640 Sputter Coater.
Coccolith counts (N) were made manually using a Zeiss DSM 940A scanning electron microscope at 3,000x and 5,000x magnification. Where possible, a minimum of 300 coccoliths were counted. In some samples fewer coccoliths were counted due to very low abundances in the LGM. Sample mass (m), magnification, split factor (k) and the area of the scanned transect (A) and the filter (F) are given for all samples to allow calculation of the concentration of coccoliths per gram of dry bulk sediment, which was calculated using: (F*N)/(k*A*m).
Coccolithophore taxonomy follows Young et al. (2003, doi:10.58998/jnr2297). Species not reported in the data are assumed to be absent (that is, zero abundance). Two subspecies of Calcidiscus leptoporus were distinguished: Calcidiscus leptoporus subsp. quadriperforatus and Calcidiscus leptoporus subsp. leptoporus. The ladder was further subdivided into small (< 5 µm) and larger (>= 5 µm) specimens. Furthermore, two subspecies of Coccolithus pelagicus were distinguished: Coccolithus pelagicus subsp. braarudii and Coccolithus pelagicus subsp. pelagicus. Counts of unidentified specimens are given.
The chronology of the time series presented here is the revised age model included in the PALMOD 130k marine palaeoclimate data synthesis V1.1 (Jonkers et al., 2020, doi:10.5194/essd-12-1053-2020). It is based on radiocarbon ages measured on the planktonic foraminifera G. bulloides and N. pachyderma as well as tephra layers and benthic foraminifera δ18O isotope data calibrated to regional benthic foraminifera δ18O stacks (Lisiecki and Stern, 2016, doi:10.1002/2016pa003002). ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.963219"!
http://en.wikipedia.org/wiki/Kyr
AGE
http://www.marinespecies.org/aphia.php?p=taxdetails&id=115082
Pontosphaera spp.
http://www.marinespecies.org/aphia.php?p=taxdetails&id=115084
Syracosphaera sp.
http://www.marinespecies.org/aphia.php?p=taxdetails&id=115099
Ophiaster hydroideus
http://www.marinespecies.org/aphia.php?p=taxdetails&id=115104
Emiliania huxleyi
http://www.marinespecies.org/aphia.php?p=taxdetails&id=235802
Acanthoica quattrospina
http://www.marinespecies.org/aphia.php?p=taxdetails&id=235944
Coronosphaera mediterranea
http://www.marinespecies.org/aphia.php?p=taxdetails&id=235954
Gephyrocapsa ericsonii
http://www.marinespecies.org/aphia.php?p=taxdetails&id=235955
Gephyrocapsa oceanica
http://www.marinespecies.org/aphia.php?p=taxdetails&id=235979
Syracosphaera pulchra
http://www.marinespecies.org/aphia.php?p=taxdetails&id=235983
Umbellosphaera tenuis
http://www.marinespecies.org/aphia.php?p=taxdetails&id=235985
Umbilicosphaera sibogae
http://www.marinespecies.org/aphia.php?p=taxdetails&id=345553
Umbilicosphaera foliosa
http://www.marinespecies.org/aphia.php?p=taxdetails&id=555889
Calciosolenia brasiliensis
http://www.marinespecies.org/aphia.php?p=taxdetails&id=576682
Reticulofenestra sessilis
http://www.marinespecies.org/aphia.php?p=taxdetails&id=615435
Helicosphaera carteri
http://www.marinespecies.org/aphia.php?p=taxdetails&id=618958
Oolithotus antillarum
https://doi.org/10.2973/odp.proc.ir.162.1996
Leg162
https://hdl.handle.net/10013/epic.27914.d001
DSDP/ODP/IODP sample designation
https://hdl.handle.net/10013/epic.50267.d001
IODP Depth Scale Terminology
https://www-odp.tamu.edu:443/resolutn.html
Joides Resolution
PANGAEA_965722
DIF
9.4
2024-04-15
2026-04-15