The transition on North America from the warm humid Pliocene to the glaciated Quaternary traced by eolian dust deposition at a benchmark North Atlantic Ocean drill site
We present Plio-Pleistocene records of sediment color, %CaCO3, foraminifer fragmentation, benthic carbon isotopes (?13C) and radiogenic isotopes (Sr, Nd, Pb) of the terrigenous component from IODP Site U1313, a reoccupation of benchmark subtropical North Atlantic Ocean DSDP Site 607. We show that (i...
Published in: | Quaternary Science Reviews |
---|---|
Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2014
|
Subjects: | |
Online Access: | https://eprints.soton.ac.uk/364730/ |
id |
ftsouthampton:oai:eprints.soton.ac.uk:364730 |
---|---|
record_format |
openpolar |
spelling |
ftsouthampton:oai:eprints.soton.ac.uk:364730 2024-02-11T10:04:55+01:00 The transition on North America from the warm humid Pliocene to the glaciated Quaternary traced by eolian dust deposition at a benchmark North Atlantic Ocean drill site Lang, David C. Bailey, Ian Wilson, Paul A. Beer, Christopher J. Bolton, Clara T. Friedrich, Oliver Newsam, Cherry Spencer, Megan R. Gutjahr, Marcus Foster, Gavin L. Cooper, Matthew J. Milton, J. Andrew 2014-06-01 https://eprints.soton.ac.uk/364730/ English eng Lang, David C., Bailey, Ian, Wilson, Paul A., Beer, Christopher J., Bolton, Clara T., Friedrich, Oliver, Newsam, Cherry, Spencer, Megan R., Gutjahr, Marcus, Foster, Gavin L., Cooper, Matthew J. and Milton, J. Andrew (2014) The transition on North America from the warm humid Pliocene to the glaciated Quaternary traced by eolian dust deposition at a benchmark North Atlantic Ocean drill site. Quaternary Science Reviews, 93, 125-141. (doi:10.1016/j.quascirev.2014.04.005 <http://dx.doi.org/10.1016/j.quascirev.2014.04.005>). Article PeerReviewed 2014 ftsouthampton https://doi.org/10.1016/j.quascirev.2014.04.005 2024-01-25T23:18:59Z We present Plio-Pleistocene records of sediment color, %CaCO3, foraminifer fragmentation, benthic carbon isotopes (?13C) and radiogenic isotopes (Sr, Nd, Pb) of the terrigenous component from IODP Site U1313, a reoccupation of benchmark subtropical North Atlantic Ocean DSDP Site 607. We show that (inter)glacial cycles in sediment color and %CaCO3 pre-date major northern hemisphere glaciation and are unambiguously and consistently correlated to benthic oxygen isotopes back to 3.3 million years ago (Ma) and intermittently so probably back to the Miocene/Pliocene boundary. We show these lithological cycles to be driven by enhanced glacial fluxes of terrigenous material (eolian dust), not carbonate dissolution (the classic interpretation). Our radiogenic isotope data indicate a North American source for this dust (?3.3–2.4 Ma) in keeping with the interpreted source of terrestrial plant wax-derived biomarkers deposited at Site U1313. Yet our data indicate a mid latitude provenance regardless of (inter)glacial state, a finding that is inconsistent with the biomarker-inferred importance of glaciogenic mechanisms of dust production and transport. Moreover, we find that the relation between the biomarker and lithogenic components of dust accumulation is distinctly non-linear. Both records show a jump in glacial rates of accumulation from Marine Isotope Stage, MIS, G6 (2.72 Ma) onwards but the amplitude of this signal is about 3–8 times greater for biomarkers than for dust and particularly extreme during MIS 100 (2.52 Ma). We conclude that North America shifted abruptly to a distinctly more arid glacial regime from MIS G6, but major shifts in glacial North American vegetation biomes and regional wind fields (exacerbated by the growth of a large Laurentide Ice Sheet during MIS 100) likely explain amplification of this signal in the biomarker records. Our findings are consistent with wetter-than-modern reconstructions of North American continental climate under the warm high CO2 conditions of the Early Pliocene but contrast ... Article in Journal/Newspaper Ice Sheet North Atlantic University of Southampton: e-Prints Soton Quaternary Science Reviews 93 125 141 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
We present Plio-Pleistocene records of sediment color, %CaCO3, foraminifer fragmentation, benthic carbon isotopes (?13C) and radiogenic isotopes (Sr, Nd, Pb) of the terrigenous component from IODP Site U1313, a reoccupation of benchmark subtropical North Atlantic Ocean DSDP Site 607. We show that (inter)glacial cycles in sediment color and %CaCO3 pre-date major northern hemisphere glaciation and are unambiguously and consistently correlated to benthic oxygen isotopes back to 3.3 million years ago (Ma) and intermittently so probably back to the Miocene/Pliocene boundary. We show these lithological cycles to be driven by enhanced glacial fluxes of terrigenous material (eolian dust), not carbonate dissolution (the classic interpretation). Our radiogenic isotope data indicate a North American source for this dust (?3.3–2.4 Ma) in keeping with the interpreted source of terrestrial plant wax-derived biomarkers deposited at Site U1313. Yet our data indicate a mid latitude provenance regardless of (inter)glacial state, a finding that is inconsistent with the biomarker-inferred importance of glaciogenic mechanisms of dust production and transport. Moreover, we find that the relation between the biomarker and lithogenic components of dust accumulation is distinctly non-linear. Both records show a jump in glacial rates of accumulation from Marine Isotope Stage, MIS, G6 (2.72 Ma) onwards but the amplitude of this signal is about 3–8 times greater for biomarkers than for dust and particularly extreme during MIS 100 (2.52 Ma). We conclude that North America shifted abruptly to a distinctly more arid glacial regime from MIS G6, but major shifts in glacial North American vegetation biomes and regional wind fields (exacerbated by the growth of a large Laurentide Ice Sheet during MIS 100) likely explain amplification of this signal in the biomarker records. Our findings are consistent with wetter-than-modern reconstructions of North American continental climate under the warm high CO2 conditions of the Early Pliocene but contrast ... |
format |
Article in Journal/Newspaper |
author |
Lang, David C. Bailey, Ian Wilson, Paul A. Beer, Christopher J. Bolton, Clara T. Friedrich, Oliver Newsam, Cherry Spencer, Megan R. Gutjahr, Marcus Foster, Gavin L. Cooper, Matthew J. Milton, J. Andrew |
spellingShingle |
Lang, David C. Bailey, Ian Wilson, Paul A. Beer, Christopher J. Bolton, Clara T. Friedrich, Oliver Newsam, Cherry Spencer, Megan R. Gutjahr, Marcus Foster, Gavin L. Cooper, Matthew J. Milton, J. Andrew The transition on North America from the warm humid Pliocene to the glaciated Quaternary traced by eolian dust deposition at a benchmark North Atlantic Ocean drill site |
author_facet |
Lang, David C. Bailey, Ian Wilson, Paul A. Beer, Christopher J. Bolton, Clara T. Friedrich, Oliver Newsam, Cherry Spencer, Megan R. Gutjahr, Marcus Foster, Gavin L. Cooper, Matthew J. Milton, J. Andrew |
author_sort |
Lang, David C. |
title |
The transition on North America from the warm humid Pliocene to the glaciated Quaternary traced by eolian dust deposition at a benchmark North Atlantic Ocean drill site |
title_short |
The transition on North America from the warm humid Pliocene to the glaciated Quaternary traced by eolian dust deposition at a benchmark North Atlantic Ocean drill site |
title_full |
The transition on North America from the warm humid Pliocene to the glaciated Quaternary traced by eolian dust deposition at a benchmark North Atlantic Ocean drill site |
title_fullStr |
The transition on North America from the warm humid Pliocene to the glaciated Quaternary traced by eolian dust deposition at a benchmark North Atlantic Ocean drill site |
title_full_unstemmed |
The transition on North America from the warm humid Pliocene to the glaciated Quaternary traced by eolian dust deposition at a benchmark North Atlantic Ocean drill site |
title_sort |
transition on north america from the warm humid pliocene to the glaciated quaternary traced by eolian dust deposition at a benchmark north atlantic ocean drill site |
publishDate |
2014 |
url |
https://eprints.soton.ac.uk/364730/ |
genre |
Ice Sheet North Atlantic |
genre_facet |
Ice Sheet North Atlantic |
op_relation |
Lang, David C., Bailey, Ian, Wilson, Paul A., Beer, Christopher J., Bolton, Clara T., Friedrich, Oliver, Newsam, Cherry, Spencer, Megan R., Gutjahr, Marcus, Foster, Gavin L., Cooper, Matthew J. and Milton, J. Andrew (2014) The transition on North America from the warm humid Pliocene to the glaciated Quaternary traced by eolian dust deposition at a benchmark North Atlantic Ocean drill site. Quaternary Science Reviews, 93, 125-141. (doi:10.1016/j.quascirev.2014.04.005 <http://dx.doi.org/10.1016/j.quascirev.2014.04.005>). |
op_doi |
https://doi.org/10.1016/j.quascirev.2014.04.005 |
container_title |
Quaternary Science Reviews |
container_volume |
93 |
container_start_page |
125 |
op_container_end_page |
141 |
_version_ |
1790601674858954752 |