FN Archimer Export Format
PT J
TI Glacial and environmental changes in northern Svalbard over the last 16.3 ka inferred from neodymium isotopes
BT 
AF Jang, Kwangchul
   Ahn, Youngkyu
   Joe, Young Jin
   Braun, Carmen A.
   Joo, Young Ji
   Kim, Jung-Hyun
   Bayon, Germain
   Forwick, Matthias
   Vogt, Christoph
   Nam, Seung-Il
AS 1:1;2:1;3:1;4:2;5:1;6:1;7:3;8:2;9:4;10:1;
FF 1:;2:;3:;4:;5:;6:;7:PDG-REM-GM-LGS;8:;9:;10:;
C1 Korea Polar Research Institute, Incheon 21990, Republic of Korea
   UiT The Arctic University of Norway, Department of Geosciences, NO-9037 Tromsø, Norway
   IFREMER, Marine Geosciences Unit, F-29280 Plouzané, France
   Crystallography, FB05 Geosciences & MARUM, University of Bremen, Klagenfurter Strasse 2-4, 28359 Bremen, Germany
C2 KOPRI, SOUTH KOREA
   UNIV ARCTIC UIT NORWAY, NORWAY
   IFREMER, FRANCE
   UNIV BREMEN MARUM, GERMANY
SI BREST
SE PDG-REM-GM-LGS
IN WOS Ifremer UPR
   copubli-europe
   copubli-int-hors-europe
IF 4.956
TC 2
UR https://archimer.ifremer.fr/doc/00688/80049/83040.pdf
LA English
DT Article
DE ;Neodymium isotopes;Svalbard-Barents Sea Ice Sheet;Hinlopen strait;Svalbard;Glacial activity
AB 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 iron 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 ca. 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 Nordaustrandet. In the context where both polar sea-ice and oceanic circulation are expected to have played minor roles in determining the εNd composition of sedimentary Fe oxyhydroxide phases, 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. 
PY 2021
PD JUL
SO Global And Planetary Change
SN 0921-8181
PU Elsevier BV
VL 201
UT 000663078200003
DI 10.1016/j.gloplacha.2021.103483
ID 80049
ER

EF