Stable isotope ratios on foraminifera from Site 138-846 ...

There is an urgent requirement to understand how large fluctuations in tropical heat distribution associated with the El Niño-Southern Oscillation (ENSO) will respond to anthropogenic emissions of greenhouse gases. Intervals of global warmth in Earth history provide a unique natural laboratory to ex...

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Bibliographic Details
Main Authors: Scroxton, Nick, Bonham, Sarah G, Rickaby, Rosalind E M, Lawrence, Sophie H F, Hermoso, Michael, Haywood, Alan M
Format: Dataset
Language:English
Published: PANGAEA 2011
Subjects:
Sample code/label
DEPTH, sediment/rock
AGE
Sample ID
Sea surface temperature
Neogloboquadrina dutertrei, δ18O
Neogloboquadrina dutertrei, δ13C
Mass
Globigerinoides ruber, δ18O
Globigerinoides ruber, δ13C
Globorotalia menardii, δ18O
Globorotalia menardii, δ13C
Drilling/drill rig
DSDP/ODP/IODP sample designation
SST calculated from alkenones
Leg138
Joides Resolution
Ocean Drilling Program ODP
Planktonic foraminifera
Online Access:https://dx.doi.org/10.1594/pangaea.744735
https://doi.pangaea.de/10.1594/PANGAEA.744735
Description
Summary:There is an urgent requirement to understand how large fluctuations in tropical heat distribution associated with the El Niño-Southern Oscillation (ENSO) will respond to anthropogenic emissions of greenhouse gases. Intervals of global warmth in Earth history provide a unique natural laboratory to explore the behaviour of the ENSO in a warmer world. To investigate interannual climatic variability, specifically ENSO, in the mid-Piacenzian Warm Period (mPWP: 3.26 - 3.03 Ma), we integrate observations from the stable isotopes of multiple individual planktonic foraminifera from three different species from the eastern equatorial Pacific (EEP) with ENSO simulations from HadCM3, a fully coupled ocean-atmosphere climate model. Our proxy data and model outputs show persistent inter-annual variability during the mPWP caused by a fluctuating thermocline, despite a deeper thermocline and reduced upwelling. We show that the likely cause of the deeper thermocline is due to warmer equatorial undercurrents rather than ... : Supplement to: Scroxton, Nick; Bonham, Sarah G; Rickaby, Rosalind E M; Lawrence, Sophie H F; Hermoso, Michael; Haywood, Alan M (2011): Persistent El Niño-Southern Oscillation variation during the Pliocene Epoch. Paleoceanography, 26, PA2215, 13 pp ...

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