(Table A1) Diatom isotope measurements from ODP Hole 145-882A ...

In comparison to other sectors of the marine system, the palaeoceanography of the subarctic North Pacific Ocean is poorly constrained. New diatom isotope records of d13C, d18O, d30Si (d13Cdiatom, d18Odiatom, and d30Sidiatom) are presented alongside existing geochemical and isotope records to documen...

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Bibliographic Details
Main Authors: Swann, George E A, Snelling, Andrea M
Format: Dataset
Language:English
Published: PANGAEA 2015
Subjects:
Sample code/label
DEPTH, sediment/rock
AGE
δ13C, diatom-bound organic matter
Diatoms, δ18O
Diatoms, δ30Si
Carbon
Coscinodiscus marginatus
Coscinodiscus radiatus
Diatoms, other
Reference/source
Drilling/drill rig
DSDP/ODP/IODP sample designation
Element analyser CHN, Costech and Optima mass spectrometer
Mass spectrometer, Finnigan, MAT 253
Leg145
Joides Resolution
Ocean Drilling Program ODP
Pacific
Swann
Subarctic
Online Access:https://dx.doi.org/10.1594/pangaea.856071
https://doi.pangaea.de/10.1594/PANGAEA.856071
Description
Summary:In comparison to other sectors of the marine system, the palaeoceanography of the subarctic North Pacific Ocean is poorly constrained. New diatom isotope records of d13C, d18O, d30Si (d13Cdiatom, d18Odiatom, and d30Sidiatom) are presented alongside existing geochemical and isotope records to document changes in photic zone conditions, including nutrient supply and the efficiency of the soft-tissue biological pump, between Marine Isotope Stage (MIS) 4 and MIS 5e. Peaks in opal productivity in MIS 5b/c and MIS 5e are both associated with the breakdown of the regional halocline stratification and increased nutrient supply to the photic zone. Whereas the MIS 5e peak is associated with low rates of nutrient utilisation, the MIS 5b/c peak is associated with significantly higher rates of nutrient utilisation. Both peaks, together with other smaller increases in productivity in MIS 4 and 5a, culminate with a significant increase in freshwater input which strengthens/re-establishes the halocline and limits further ... : Supplement to: Swann, George E A; Snelling, Andrea M (2015): Photic zone changes in the north-west Pacific Ocean from MIS 4–5e. Climate of the Past, 11(1), 15-25 ...

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