Glacial and environmental changes in northern Svalbard over the last 16.3 ka inferred from neodymium isotopes
Accepted manuscript version, licensed CC BY-NC-ND 4.0. The reconstruction of past ice sheet extents and dynamics in polar regions is essential for understanding the global climate system and obtaining more reliable predictions of future climate change. Here, we present a multi-proxy dataset integrat...
Published in: | Global and Planetary Change |
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ftunivtroemsoe:oai:munin.uit.no:10037/22144 2023-05-15T15:39:12+02:00 Glacial and environmental changes in northern Svalbard over the last 16.3 ka inferred from neodymium isotopes Jang, Kwangchul Ahn, Youngkyu Joe, Young Jin Braun, Carmen Joo, Young Ji Kim, Jung-Hyun Bayon, Germain Forwick, Matthias Vogt, Christoph Nam, Seung-Il 2021-04-05 https://hdl.handle.net/10037/22144 https://doi.org/10.1016/j.gloplacha.2021.103483 eng eng Elsevier Global and Planetary Change Andre: 2017R1A6A3A01076729 Andre: NRF-2015M1A5A1037243 Jang K, Ahn, Joe YJ, Braun CA, Joo YJ, Kim J, Bayon G, Forwick M, Vogt C, Nam S. Glacial and environmental changes in northern Svalbard over the last 16.3 ka inferred from neodymium isotopes. Global and Planetary Change. 2021;201 FRIDAID 1924353 doi:10.1016/j.gloplacha.2021.103483 0921-8181 1872-6364 https://hdl.handle.net/10037/22144 embargoedAccess © 2021 Elsevier B.V. All rights reserved. VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Journal article Tidsskriftartikkel Peer reviewed acceptedVersion 2021 ftunivtroemsoe https://doi.org/10.1016/j.gloplacha.2021.103483 2021-08-25T22:53:41Z Accepted manuscript version, licensed CC BY-NC-ND 4.0. The reconstruction of past ice sheet extents and dynamics in polar regions is essential for understanding the global climate system and obtaining more reliable predictions of future climate change. Here, we present a multi-proxy dataset integrating the Nd isotopic compositions (εNd) of paired detrital and authigenic Fe oxide fractions, grain size distributions, organic geochemistry, and mineral assemblages in a glacimarine sediment core (core HH17–1085-GC) retrieved from the continental shelf off northern Svalbard. Our results indicate variability in sediment provenance and chemical weathering patterns since the last deglaciation, allowing us to distinguish a succession of distinct paleoclimate events: 1) a general retreat of the Svalbard-Barents Sea Ice Sheet (SBIS) from the continental shelf before ca. 16.3 ka BP; 2) an intense episode of meltwater discharge related to massive glacier loss between ca. 12.1–9.9 ka BP; and 3) a period of reduced meltwater input between ca. 9.9 and 2.7 ka BP followed by 4) a phase of glacier re-advance over the last two millennia. Evidence for the prolonged supply of radiogenic detrital εNd and dolomite at the site of core HH17–1085-GC indicates that the onset of deglaciation offshore northeastern Svalbard may have occurred at least 1 ka later than that at the northwestern shelf, which can be further evaluated by obtaining a more precise end-member determination for the northeastern source with a quantitative εNd dataset from Nordaustlandet. In the context where both polar sea-ice and oceanic circulation are expected to have played minor roles in determining the sedimentary εNd compositions, the evidence for pronounced Nd isotopic decoupling between paired authigenic and detrital signatures (ΔεNd) at ca. 15.2 and 14.1 ka BP is interpreted as reflecting chemical weathering changes following the retreat of the SBIS on northern Svalbard, probably corresponding to punctual episodes of glacial re-advances. Our findings provide a better understanding of the deglacial history of northern Svalbard during and after the last deglaciation and highlight the utility of Nd isotopes as a proxy for reconstructing paleo-cryosphere changes Article in Journal/Newspaper Barents Sea glacier Ice Sheet Nordaustlandet Sea ice Svalbard Svalbard-Barents Sea Ice sheet University of Tromsø: Munin Open Research Archive Barents Sea Nordaustlandet ENVELOPE(22.400,22.400,79.800,79.800) Svalbard Global and Planetary Change 201 103483 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Jang, Kwangchul Ahn, Youngkyu Joe, Young Jin Braun, Carmen Joo, Young Ji Kim, Jung-Hyun Bayon, Germain Forwick, Matthias Vogt, Christoph Nam, Seung-Il Glacial and environmental changes in northern Svalbard over the last 16.3 ka inferred from neodymium isotopes |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
description |
Accepted manuscript version, licensed CC BY-NC-ND 4.0. The reconstruction of past ice sheet extents and dynamics in polar regions is essential for understanding the global climate system and obtaining more reliable predictions of future climate change. Here, we present a multi-proxy dataset integrating the Nd isotopic compositions (εNd) of paired detrital and authigenic Fe oxide fractions, grain size distributions, organic geochemistry, and mineral assemblages in a glacimarine sediment core (core HH17–1085-GC) retrieved from the continental shelf off northern Svalbard. Our results indicate variability in sediment provenance and chemical weathering patterns since the last deglaciation, allowing us to distinguish a succession of distinct paleoclimate events: 1) a general retreat of the Svalbard-Barents Sea Ice Sheet (SBIS) from the continental shelf before ca. 16.3 ka BP; 2) an intense episode of meltwater discharge related to massive glacier loss between ca. 12.1–9.9 ka BP; and 3) a period of reduced meltwater input between ca. 9.9 and 2.7 ka BP followed by 4) a phase of glacier re-advance over the last two millennia. Evidence for the prolonged supply of radiogenic detrital εNd and dolomite at the site of core HH17–1085-GC indicates that the onset of deglaciation offshore northeastern Svalbard may have occurred at least 1 ka later than that at the northwestern shelf, which can be further evaluated by obtaining a more precise end-member determination for the northeastern source with a quantitative εNd dataset from Nordaustlandet. In the context where both polar sea-ice and oceanic circulation are expected to have played minor roles in determining the sedimentary εNd compositions, the evidence for pronounced Nd isotopic decoupling between paired authigenic and detrital signatures (ΔεNd) at ca. 15.2 and 14.1 ka BP is interpreted as reflecting chemical weathering changes following the retreat of the SBIS on northern Svalbard, probably corresponding to punctual episodes of glacial re-advances. Our findings provide a better understanding of the deglacial history of northern Svalbard during and after the last deglaciation and highlight the utility of Nd isotopes as a proxy for reconstructing paleo-cryosphere changes |
format |
Article in Journal/Newspaper |
author |
Jang, Kwangchul Ahn, Youngkyu Joe, Young Jin Braun, Carmen Joo, Young Ji Kim, Jung-Hyun Bayon, Germain Forwick, Matthias Vogt, Christoph Nam, Seung-Il |
author_facet |
Jang, Kwangchul Ahn, Youngkyu Joe, Young Jin Braun, Carmen Joo, Young Ji Kim, Jung-Hyun Bayon, Germain Forwick, Matthias Vogt, Christoph Nam, Seung-Il |
author_sort |
Jang, Kwangchul |
title |
Glacial and environmental changes in northern Svalbard over the last 16.3 ka inferred from neodymium isotopes |
title_short |
Glacial and environmental changes in northern Svalbard over the last 16.3 ka inferred from neodymium isotopes |
title_full |
Glacial and environmental changes in northern Svalbard over the last 16.3 ka inferred from neodymium isotopes |
title_fullStr |
Glacial and environmental changes in northern Svalbard over the last 16.3 ka inferred from neodymium isotopes |
title_full_unstemmed |
Glacial and environmental changes in northern Svalbard over the last 16.3 ka inferred from neodymium isotopes |
title_sort |
glacial and environmental changes in northern svalbard over the last 16.3 ka inferred from neodymium isotopes |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://hdl.handle.net/10037/22144 https://doi.org/10.1016/j.gloplacha.2021.103483 |
long_lat |
ENVELOPE(22.400,22.400,79.800,79.800) |
geographic |
Barents Sea Nordaustlandet Svalbard |
geographic_facet |
Barents Sea Nordaustlandet Svalbard |
genre |
Barents Sea glacier Ice Sheet Nordaustlandet Sea ice Svalbard Svalbard-Barents Sea Ice sheet |
genre_facet |
Barents Sea glacier Ice Sheet Nordaustlandet Sea ice Svalbard Svalbard-Barents Sea Ice sheet |
op_relation |
Global and Planetary Change Andre: 2017R1A6A3A01076729 Andre: NRF-2015M1A5A1037243 Jang K, Ahn, Joe YJ, Braun CA, Joo YJ, Kim J, Bayon G, Forwick M, Vogt C, Nam S. Glacial and environmental changes in northern Svalbard over the last 16.3 ka inferred from neodymium isotopes. Global and Planetary Change. 2021;201 FRIDAID 1924353 doi:10.1016/j.gloplacha.2021.103483 0921-8181 1872-6364 https://hdl.handle.net/10037/22144 |
op_rights |
embargoedAccess © 2021 Elsevier B.V. All rights reserved. |
op_doi |
https://doi.org/10.1016/j.gloplacha.2021.103483 |
container_title |
Global and Planetary Change |
container_volume |
201 |
container_start_page |
103483 |
_version_ |
1766370681043288064 |