Stable isotope ratios on foraminifera from Site 138-846, 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
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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ftdatacite:10.1594/pangaea.744735 2023-05-15T18:01:11+02:00 Stable isotope ratios on foraminifera from Site 138-846, 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 Scroxton, Nick Bonham, Sarah G Rickaby, Rosalind E M Lawrence, Sophie H F Hermoso, Michael Haywood, Alan M 2011 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.744735 https://doi.pangaea.de/10.1594/PANGAEA.744735 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1029/2010pa002097 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY 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 Supplementary Dataset dataset Dataset 2011 ftdatacite https://doi.org/10.1594/pangaea.744735 https://doi.org/10.1029/2010pa002097 2022-02-08T16:24:46Z 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 reduced physical upwelling. We conclude that the mPWP was characterized by ENSO related variability around a mean state akin to a modern El Niño event. Furthermore, HadCM3 predicts that the warmer Pliocene world is characterized by a more periodic, regular amplitude ENSO fluctuation, suggestive that the larger and deeper west Pacific warm pool is more easily destabilized eastwards. These conclusions are comparable to the observed trend over the last forty years to more regular and intense ENSO events. Future research must resolve whether global warming alone, or in concert with tectonic factors, was sufficient to alter ENSO variability during warm intervals of the Pliocene. Dataset Planktonic foraminifera DataCite Metadata Store (German National Library of Science and Technology) Pacific |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
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 |
spellingShingle |
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 Scroxton, Nick Bonham, Sarah G Rickaby, Rosalind E M Lawrence, Sophie H F Hermoso, Michael Haywood, Alan M Stable isotope ratios on foraminifera from Site 138-846, 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 |
topic_facet |
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 |
description |
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 reduced physical upwelling. We conclude that the mPWP was characterized by ENSO related variability around a mean state akin to a modern El Niño event. Furthermore, HadCM3 predicts that the warmer Pliocene world is characterized by a more periodic, regular amplitude ENSO fluctuation, suggestive that the larger and deeper west Pacific warm pool is more easily destabilized eastwards. These conclusions are comparable to the observed trend over the last forty years to more regular and intense ENSO events. Future research must resolve whether global warming alone, or in concert with tectonic factors, was sufficient to alter ENSO variability during warm intervals of the Pliocene. |
format |
Dataset |
author |
Scroxton, Nick Bonham, Sarah G Rickaby, Rosalind E M Lawrence, Sophie H F Hermoso, Michael Haywood, Alan M |
author_facet |
Scroxton, Nick Bonham, Sarah G Rickaby, Rosalind E M Lawrence, Sophie H F Hermoso, Michael Haywood, Alan M |
author_sort |
Scroxton, Nick |
title |
Stable isotope ratios on foraminifera from Site 138-846, 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 |
title_short |
Stable isotope ratios on foraminifera from Site 138-846, 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 |
title_full |
Stable isotope ratios on foraminifera from Site 138-846, 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 |
title_fullStr |
Stable isotope ratios on foraminifera from Site 138-846, 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 |
title_full_unstemmed |
Stable isotope ratios on foraminifera from Site 138-846, 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 |
title_sort |
stable isotope ratios on foraminifera from site 138-846, 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 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2011 |
url |
https://dx.doi.org/10.1594/pangaea.744735 https://doi.pangaea.de/10.1594/PANGAEA.744735 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
https://dx.doi.org/10.1029/2010pa002097 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.744735 https://doi.org/10.1029/2010pa002097 |
_version_ |
1766170551834902528 |