Tracking millennial-scale Holocene glacial advance and retreat using osmium isotopes : insights from the Greenland ice sheet.
High-resolution Os isotope stratigraphy can aid in reconstructing Pleistocene ice sheet fluctuation and elucidating the role of local and regional weathering fluxes on the marine Os residence time. This paper presents new Os isotope data from ocean cores adjacent to the West Greenland ice sheet that...
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Online Access: | http://dro.dur.ac.uk/17677/ http://dro.dur.ac.uk/17677/1/17677.pdf http://dro.dur.ac.uk/17677/2/17766.pdf https://doi.org/10.1016/j.quascirev.2016.02.021 |
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:17677 2023-05-15T16:27:00+02:00 Tracking millennial-scale Holocene glacial advance and retreat using osmium isotopes : insights from the Greenland ice sheet. Rooney, A.D. Selby, D. Lloyd, J.M. Roberts, D.H. Lückge, A. Sageman, B.B. Prouty, N.G. 2016-04-15 application/pdf http://dro.dur.ac.uk/17677/ http://dro.dur.ac.uk/17677/1/17677.pdf http://dro.dur.ac.uk/17677/2/17766.pdf https://doi.org/10.1016/j.quascirev.2016.02.021 unknown Elsevier dro:17677 issn:0277-3791 doi:10.1016/j.quascirev.2016.02.021 http://dro.dur.ac.uk/17677/ http://dx.doi.org/10.1016/j.quascirev.2016.02.021 http://dro.dur.ac.uk/17677/1/17677.pdf http://dro.dur.ac.uk/17677/2/17766.pdf © 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) CC-BY Quaternary science reviews, 2016, Vol.138, pp.49-61 [Peer Reviewed Journal] Article PeerReviewed 2016 ftunivdurham https://doi.org/10.1016/j.quascirev.2016.02.021 2020-06-11T22:23:23Z High-resolution Os isotope stratigraphy can aid in reconstructing Pleistocene ice sheet fluctuation and elucidating the role of local and regional weathering fluxes on the marine Os residence time. This paper presents new Os isotope data from ocean cores adjacent to the West Greenland ice sheet that have excellent chronological controls. Cores MSM-520 and DA00-06 represent distal to proximal sites adjacent to two West Greenland ice streams. Core MSM-520 has a steadily decreasing Os signal over the last 10 kyr (187Os/188Os = 1.35–0.81). In contrast, Os isotopes from core DA00-06 (proximal to the calving front of Jakobshavn Isbræ) highlight four stages of ice stream retreat and advance over the past 10 kyr (187Os/188Os = 2.31; 1.68; 2.09; 1.47). Our high-resolution chemostratigraphic records provide vital benchmarks for ice-sheet modelers as we attempt to better constrain the future response of major ice sheets to climate change. Variations in Os isotope composition from sediment and macro-algae (seaweed) sourced from regional and global settings serve to emphasize the overwhelming effect weathering sources have on seawater Os isotope composition. Further, these findings demonstrate that the residence time of Os is shorter than previous estimates of ∼104 yr. Article in Journal/Newspaper Greenland Ice Sheet Jakobshavn Jakobshavn isbræ Durham University: Durham Research Online Greenland Jakobshavn Isbræ ENVELOPE(-49.917,-49.917,69.167,69.167) Quaternary Science Reviews 138 49 61 |
institution |
Open Polar |
collection |
Durham University: Durham Research Online |
op_collection_id |
ftunivdurham |
language |
unknown |
description |
High-resolution Os isotope stratigraphy can aid in reconstructing Pleistocene ice sheet fluctuation and elucidating the role of local and regional weathering fluxes on the marine Os residence time. This paper presents new Os isotope data from ocean cores adjacent to the West Greenland ice sheet that have excellent chronological controls. Cores MSM-520 and DA00-06 represent distal to proximal sites adjacent to two West Greenland ice streams. Core MSM-520 has a steadily decreasing Os signal over the last 10 kyr (187Os/188Os = 1.35–0.81). In contrast, Os isotopes from core DA00-06 (proximal to the calving front of Jakobshavn Isbræ) highlight four stages of ice stream retreat and advance over the past 10 kyr (187Os/188Os = 2.31; 1.68; 2.09; 1.47). Our high-resolution chemostratigraphic records provide vital benchmarks for ice-sheet modelers as we attempt to better constrain the future response of major ice sheets to climate change. Variations in Os isotope composition from sediment and macro-algae (seaweed) sourced from regional and global settings serve to emphasize the overwhelming effect weathering sources have on seawater Os isotope composition. Further, these findings demonstrate that the residence time of Os is shorter than previous estimates of ∼104 yr. |
format |
Article in Journal/Newspaper |
author |
Rooney, A.D. Selby, D. Lloyd, J.M. Roberts, D.H. Lückge, A. Sageman, B.B. Prouty, N.G. |
spellingShingle |
Rooney, A.D. Selby, D. Lloyd, J.M. Roberts, D.H. Lückge, A. Sageman, B.B. Prouty, N.G. Tracking millennial-scale Holocene glacial advance and retreat using osmium isotopes : insights from the Greenland ice sheet. |
author_facet |
Rooney, A.D. Selby, D. Lloyd, J.M. Roberts, D.H. Lückge, A. Sageman, B.B. Prouty, N.G. |
author_sort |
Rooney, A.D. |
title |
Tracking millennial-scale Holocene glacial advance and retreat using osmium isotopes : insights from the Greenland ice sheet. |
title_short |
Tracking millennial-scale Holocene glacial advance and retreat using osmium isotopes : insights from the Greenland ice sheet. |
title_full |
Tracking millennial-scale Holocene glacial advance and retreat using osmium isotopes : insights from the Greenland ice sheet. |
title_fullStr |
Tracking millennial-scale Holocene glacial advance and retreat using osmium isotopes : insights from the Greenland ice sheet. |
title_full_unstemmed |
Tracking millennial-scale Holocene glacial advance and retreat using osmium isotopes : insights from the Greenland ice sheet. |
title_sort |
tracking millennial-scale holocene glacial advance and retreat using osmium isotopes : insights from the greenland ice sheet. |
publisher |
Elsevier |
publishDate |
2016 |
url |
http://dro.dur.ac.uk/17677/ http://dro.dur.ac.uk/17677/1/17677.pdf http://dro.dur.ac.uk/17677/2/17766.pdf https://doi.org/10.1016/j.quascirev.2016.02.021 |
long_lat |
ENVELOPE(-49.917,-49.917,69.167,69.167) |
geographic |
Greenland Jakobshavn Isbræ |
geographic_facet |
Greenland Jakobshavn Isbræ |
genre |
Greenland Ice Sheet Jakobshavn Jakobshavn isbræ |
genre_facet |
Greenland Ice Sheet Jakobshavn Jakobshavn isbræ |
op_source |
Quaternary science reviews, 2016, Vol.138, pp.49-61 [Peer Reviewed Journal] |
op_relation |
dro:17677 issn:0277-3791 doi:10.1016/j.quascirev.2016.02.021 http://dro.dur.ac.uk/17677/ http://dx.doi.org/10.1016/j.quascirev.2016.02.021 http://dro.dur.ac.uk/17677/1/17677.pdf http://dro.dur.ac.uk/17677/2/17766.pdf |
op_rights |
© 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.quascirev.2016.02.021 |
container_title |
Quaternary Science Reviews |
container_volume |
138 |
container_start_page |
49 |
op_container_end_page |
61 |
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1766016040447246336 |