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Improving chronological control for environmental sequences from the last glacial period

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Improving chronological control for environmental sequences from the last glacial period. / Briant, Rebecca M.; Brock, Fiona; Demarchi, Beatrice; Langford, Harold E.; Penkman, Kirsty E.H.; Schreve, Danielle C.; Schwenninger, Jean-Luc; Taylor, Sheila.

In: Quaternary Geochronology, Vol. 43, 01.02.2018, p. 40-49.

Research output: Contribution to journalArticlepeer-review

Harvard

Briant, RM, Brock, F, Demarchi, B, Langford, HE, Penkman, KEH, Schreve, DC, Schwenninger, J-L & Taylor, S 2018, 'Improving chronological control for environmental sequences from the last glacial period', Quaternary Geochronology, vol. 43, pp. 40-49. https://doi.org/10.1016/j.quageo.2017.10.003

APA

Briant, R. M., Brock, F., Demarchi, B., Langford, H. E., Penkman, K. E. H., Schreve, D. C., Schwenninger, J-L., & Taylor, S. (2018). Improving chronological control for environmental sequences from the last glacial period. Quaternary Geochronology, 43, 40-49. https://doi.org/10.1016/j.quageo.2017.10.003

Vancouver

Briant RM, Brock F, Demarchi B, Langford HE, Penkman KEH, Schreve DC et al. Improving chronological control for environmental sequences from the last glacial period. Quaternary Geochronology. 2018 Feb 1;43:40-49. https://doi.org/10.1016/j.quageo.2017.10.003

Author

Briant, Rebecca M. ; Brock, Fiona ; Demarchi, Beatrice ; Langford, Harold E. ; Penkman, Kirsty E.H. ; Schreve, Danielle C. ; Schwenninger, Jean-Luc ; Taylor, Sheila. / Improving chronological control for environmental sequences from the last glacial period. In: Quaternary Geochronology. 2018 ; Vol. 43. pp. 40-49.

Bibtex - Download

@article{ac2bf9e96dd947b1a0d53410fc0b4f41,
title = "Improving chronological control for environmental sequences from the last glacial period",
abstract = "Recognition of palaeoclimatic instability in the Greenland ice cores has spurred researchers to identify corresponding evidence in other terrestrial records from the last glacial stage. Such evidence is critical for establishing how much environmental stress precipitated Neanderthal and Late Pleistocene megafaunal extinctions, although a need for improved chronology has been consistently highlighted. In formerly glaciated and periglaciated areas of northern Europe, palaeoenvironmental sequences are frequently discontinuous. These often yield high-resolution proxy-based quantitative palaeotemperature estimates but can be hard to date, due to difficulties in removing contamination from biological samples at the limits of the radiocarbon technique (c.30-50kya). Here we demonstrate, for the first time using samples with independent age control, that different radiocarbon pretreatments can generate different age data and that gentler, less effective treatments applied to avoid sample loss may not yield reliable age-estimates. We advocate alternative harsher pretreatment using a strong acid-base-acid protocol. This provides an acceptable balance between contamination removal and excessive sample loss and generates more accurate ages, significantly enhancing our ability to detect and understand the impacts of palaeoclimatic instability in the terrestrial record of the last glacial.",
author = "Briant, {Rebecca M.} and Fiona Brock and Beatrice Demarchi and Langford, {Harold E.} and Penkman, {Kirsty E.H.} and Schreve, {Danielle C.} and Jean-Luc Schwenninger and Sheila Taylor",
note = "{\textcopyright} 2017 Published by Elsevier B.V. This is an author-produced version of the published paper. Uploaded in accordance with the publisher{\textquoteright}s self-archiving policy. ",
year = "2018",
month = feb,
day = "1",
doi = "10.1016/j.quageo.2017.10.003",
language = "English",
volume = "43",
pages = "40--49",
journal = "Quaternary Geochronology",
issn = "1871-1014",
publisher = "Elsevier",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Improving chronological control for environmental sequences from the last glacial period

AU - Briant, Rebecca M.

AU - Brock, Fiona

AU - Demarchi, Beatrice

AU - Langford, Harold E.

AU - Penkman, Kirsty E.H.

AU - Schreve, Danielle C.

AU - Schwenninger, Jean-Luc

AU - Taylor, Sheila

N1 - © 2017 Published by Elsevier B.V. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy.

PY - 2018/2/1

Y1 - 2018/2/1

N2 - Recognition of palaeoclimatic instability in the Greenland ice cores has spurred researchers to identify corresponding evidence in other terrestrial records from the last glacial stage. Such evidence is critical for establishing how much environmental stress precipitated Neanderthal and Late Pleistocene megafaunal extinctions, although a need for improved chronology has been consistently highlighted. In formerly glaciated and periglaciated areas of northern Europe, palaeoenvironmental sequences are frequently discontinuous. These often yield high-resolution proxy-based quantitative palaeotemperature estimates but can be hard to date, due to difficulties in removing contamination from biological samples at the limits of the radiocarbon technique (c.30-50kya). Here we demonstrate, for the first time using samples with independent age control, that different radiocarbon pretreatments can generate different age data and that gentler, less effective treatments applied to avoid sample loss may not yield reliable age-estimates. We advocate alternative harsher pretreatment using a strong acid-base-acid protocol. This provides an acceptable balance between contamination removal and excessive sample loss and generates more accurate ages, significantly enhancing our ability to detect and understand the impacts of palaeoclimatic instability in the terrestrial record of the last glacial.

AB - Recognition of palaeoclimatic instability in the Greenland ice cores has spurred researchers to identify corresponding evidence in other terrestrial records from the last glacial stage. Such evidence is critical for establishing how much environmental stress precipitated Neanderthal and Late Pleistocene megafaunal extinctions, although a need for improved chronology has been consistently highlighted. In formerly glaciated and periglaciated areas of northern Europe, palaeoenvironmental sequences are frequently discontinuous. These often yield high-resolution proxy-based quantitative palaeotemperature estimates but can be hard to date, due to difficulties in removing contamination from biological samples at the limits of the radiocarbon technique (c.30-50kya). Here we demonstrate, for the first time using samples with independent age control, that different radiocarbon pretreatments can generate different age data and that gentler, less effective treatments applied to avoid sample loss may not yield reliable age-estimates. We advocate alternative harsher pretreatment using a strong acid-base-acid protocol. This provides an acceptable balance between contamination removal and excessive sample loss and generates more accurate ages, significantly enhancing our ability to detect and understand the impacts of palaeoclimatic instability in the terrestrial record of the last glacial.

UR - http://www.scopus.com/inward/record.url?scp=85032856042&partnerID=8YFLogxK

U2 - 10.1016/j.quageo.2017.10.003

DO - 10.1016/j.quageo.2017.10.003

M3 - Article

AN - SCOPUS:85032856042

VL - 43

SP - 40

EP - 49

JO - Quaternary Geochronology

JF - Quaternary Geochronology

SN - 1871-1014

ER -