A stable isotope record of late Quaternary hydrologic change in the northwestern Brooks Range, Alaska (eastern Beringia)
A submillennial-resolution record of lake water oxygen isotope composition (δ 18 O) from chironomid head capsules is presented from Burial Lake, north-west Alaska. The record spans the Last Glacial Maximum (LGM; ~20–16k cal a bp) to the present and shows a series of large lake δ 18 O shifts (~5‰). R...
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2021
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ftsouthampton:oai:eprints.soton.ac.uk:453394 2024-02-11T10:02:33+01:00 A stable isotope record of late Quaternary hydrologic change in the northwestern Brooks Range, Alaska (eastern Beringia) King, Amanda L. Anderson, Lesleigh Abbott, Mark Edwards, Mary Finkenbinder, Matthew S. Finney, Bruce Wooller, Matthew J. 2021-09-21 text https://eprints.soton.ac.uk/453394/ https://eprints.soton.ac.uk/453394/1/A_stable_isotope_record_Supplementary_Figures_and_Tables.pdf https://eprints.soton.ac.uk/453394/2/A_stable_isotope_record_.docx en English eng https://eprints.soton.ac.uk/453394/1/A_stable_isotope_record_Supplementary_Figures_and_Tables.pdf https://eprints.soton.ac.uk/453394/2/A_stable_isotope_record_.docx King, Amanda L., Anderson, Lesleigh, Abbott, Mark, Edwards, Mary, Finkenbinder, Matthew S., Finney, Bruce and Wooller, Matthew J. (2021) A stable isotope record of late Quaternary hydrologic change in the northwestern Brooks Range, Alaska (eastern Beringia). Journal of Quaternary Science. (doi:10.1002/jqs.3368 <http://dx.doi.org/10.1002/jqs.3368>). accepted_manuscript Article PeerReviewed 2021 ftsouthampton https://doi.org/10.1002/jqs.3368 2024-01-25T23:20:26Z A submillennial-resolution record of lake water oxygen isotope composition (δ 18 O) from chironomid head capsules is presented from Burial Lake, north-west Alaska. The record spans the Last Glacial Maximum (LGM; ~20–16k cal a bp) to the present and shows a series of large lake δ 18 O shifts (~5‰). Relatively low δ 18 O values occurred during a period covering the LGM, when the lake was a shallow, closed-basin pond. Higher values characterize deglaciation (~16–11.5k cal a bp) when the lake was still closed but lake levels were higher. A rapid decline between ~11 and 10.5k cal a bp indicates that lake levels rose to overflowing. Lake δ 18 O values are interpreted to reflect the combined effects of changes in lake hydrology, growing season temperature and meteoric source water as well as large-scale environmental changes impacting this site, including opening of the Bering Strait and shifts in atmospheric circulation patterns related to ice-sheet dynamics. The results indicate significant shifts in precipitation minus evaporation across the late Pleistocene to early Holocene transition, which are consistent with temporal patterns of vegetation change and paludification. This study provides new perspectives on the paleohydrology of eastern Beringia concomitant with human migration and major turnover in megafaunal assemblages. Article in Journal/Newspaper Bering Strait Brooks Range Ice Sheet Alaska Beringia University of Southampton: e-Prints Soton Bering Strait Basin Pond ENVELOPE(-56.031,-56.031,51.117,51.117) Journal of Quaternary Science |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
A submillennial-resolution record of lake water oxygen isotope composition (δ 18 O) from chironomid head capsules is presented from Burial Lake, north-west Alaska. The record spans the Last Glacial Maximum (LGM; ~20–16k cal a bp) to the present and shows a series of large lake δ 18 O shifts (~5‰). Relatively low δ 18 O values occurred during a period covering the LGM, when the lake was a shallow, closed-basin pond. Higher values characterize deglaciation (~16–11.5k cal a bp) when the lake was still closed but lake levels were higher. A rapid decline between ~11 and 10.5k cal a bp indicates that lake levels rose to overflowing. Lake δ 18 O values are interpreted to reflect the combined effects of changes in lake hydrology, growing season temperature and meteoric source water as well as large-scale environmental changes impacting this site, including opening of the Bering Strait and shifts in atmospheric circulation patterns related to ice-sheet dynamics. The results indicate significant shifts in precipitation minus evaporation across the late Pleistocene to early Holocene transition, which are consistent with temporal patterns of vegetation change and paludification. This study provides new perspectives on the paleohydrology of eastern Beringia concomitant with human migration and major turnover in megafaunal assemblages. |
format |
Article in Journal/Newspaper |
author |
King, Amanda L. Anderson, Lesleigh Abbott, Mark Edwards, Mary Finkenbinder, Matthew S. Finney, Bruce Wooller, Matthew J. |
spellingShingle |
King, Amanda L. Anderson, Lesleigh Abbott, Mark Edwards, Mary Finkenbinder, Matthew S. Finney, Bruce Wooller, Matthew J. A stable isotope record of late Quaternary hydrologic change in the northwestern Brooks Range, Alaska (eastern Beringia) |
author_facet |
King, Amanda L. Anderson, Lesleigh Abbott, Mark Edwards, Mary Finkenbinder, Matthew S. Finney, Bruce Wooller, Matthew J. |
author_sort |
King, Amanda L. |
title |
A stable isotope record of late Quaternary hydrologic change in the northwestern Brooks Range, Alaska (eastern Beringia) |
title_short |
A stable isotope record of late Quaternary hydrologic change in the northwestern Brooks Range, Alaska (eastern Beringia) |
title_full |
A stable isotope record of late Quaternary hydrologic change in the northwestern Brooks Range, Alaska (eastern Beringia) |
title_fullStr |
A stable isotope record of late Quaternary hydrologic change in the northwestern Brooks Range, Alaska (eastern Beringia) |
title_full_unstemmed |
A stable isotope record of late Quaternary hydrologic change in the northwestern Brooks Range, Alaska (eastern Beringia) |
title_sort |
stable isotope record of late quaternary hydrologic change in the northwestern brooks range, alaska (eastern beringia) |
publishDate |
2021 |
url |
https://eprints.soton.ac.uk/453394/ https://eprints.soton.ac.uk/453394/1/A_stable_isotope_record_Supplementary_Figures_and_Tables.pdf https://eprints.soton.ac.uk/453394/2/A_stable_isotope_record_.docx |
long_lat |
ENVELOPE(-56.031,-56.031,51.117,51.117) |
geographic |
Bering Strait Basin Pond |
geographic_facet |
Bering Strait Basin Pond |
genre |
Bering Strait Brooks Range Ice Sheet Alaska Beringia |
genre_facet |
Bering Strait Brooks Range Ice Sheet Alaska Beringia |
op_relation |
https://eprints.soton.ac.uk/453394/1/A_stable_isotope_record_Supplementary_Figures_and_Tables.pdf https://eprints.soton.ac.uk/453394/2/A_stable_isotope_record_.docx King, Amanda L., Anderson, Lesleigh, Abbott, Mark, Edwards, Mary, Finkenbinder, Matthew S., Finney, Bruce and Wooller, Matthew J. (2021) A stable isotope record of late Quaternary hydrologic change in the northwestern Brooks Range, Alaska (eastern Beringia). Journal of Quaternary Science. (doi:10.1002/jqs.3368 <http://dx.doi.org/10.1002/jqs.3368>). |
op_rights |
accepted_manuscript |
op_doi |
https://doi.org/10.1002/jqs.3368 |
container_title |
Journal of Quaternary Science |
_version_ |
1790598577568874496 |