FN Archimer Export Format
PT J
TI Non-linear response of glacier melting to Holocene warming in Svalbard recorded by sedimentary iron (oxyhydr)oxides
BT 
AF Jang, Kwangchul
   Bayon, Germain
   Vogt, Christoph
   Forwick, Matthias
   Ahn, Youngkyu
   Kim, Jung-Hyun
   Nam, Seung-Il
AS 1:1;2:2;3:3;4:4;5:1;6:1;7:1;
FF 1:;2:PDG-REM-GEOOCEAN-ASTRE;3:;4:;5:;6:;7:;
C1 Division of Glacial Environment Research, Korea Polar Research Institute, Incheon 21990, Republic of Korea
   Univ Brest, CNRS, Ifremer, Geo-Ocean, F-29280 Plouzané, France
   Crystallography & Geomaterials, FB05 Geosciences & MARUM, University of Bremen, 28359 Bremen, Germany
   Department of Geosciences, UiT The Arctic University of Norway, NO-9037 Tromsø, Norway
C2 KOPRI, SOUTH KOREA
   IFREMER, FRANCE
   UNIV BREMEN MARUM, GERMANY
   UNIV ARCTIC UIT NORWAY, NORWAY
SI BREST
SE PDG-REM-GEOOCEAN-ASTRE
UM GEO-OCEAN
IN WOS Ifremer UMR
   copubli-europe
   copubli-int-hors-europe
IF 5.3
TC 0
UR https://archimer.ifremer.fr/doc/00824/93566/100289.pdf
   https://archimer.ifremer.fr/doc/00824/93566/100290.docx
   https://archimer.ifremer.fr/doc/00824/93566/100291.xlsx
LA English
DT Article
DE ;iron (oxyhydr)oxides;high Arctic environments;glacier retreat;tipping point;accelerated glacier melting;neodymium isotopes
AB The recent acceleration of ice-sheet loss with its direct impact on sea-level rise and coastal ecosystems is of major environmental and societal concern. However, the effect of atmospheric temperature increases on long-term glacier retreat remains poorly defined due to limited historical observations and uncertainties in numerical ice-sheet models, which challenges climate change adaptation planning. Here, we present a novel approach for investigating the time-transgressive response of Arctic glaciers since the last deglaciation, using glacially-derived Fe-(oxyhydr)oxide layers preserved in glacimarine sediments from a large fjord system in Svalbard. Glacial weathering releases large amounts of Fe, resulting in the deposition of Fe-(oxyhydr)oxide particulates in nearby marine sediments, which can serve as fossil indicators of past glacial melting events. Our results indicate that Svalbard glaciers retreated at a rate of 18 to 41 m/yr between 16.3 and 10.8 kyr BP, synchronously with the progressive rise in atmospheric and oceanic temperatures. From 10.8 kyr BP, glacier retreat markedly accelerated (up to ∼116 m/yr) when regional atmospheric temperatures exceeded modern values. Coupled with field observations, this finding directly supports a non-linear response of glacial melting to summer air temperature increases. In addition to suggesting that ice-sheet loss and sea-level rise may further accelerate in the near future, this study paves the way for the use of sedimentary Fe-(oxyhydr)oxide layers in subarctic environments for reconstructing past glacial dynamics. 
PY 2023
PD APR
SO Earth And Planetary Science Letters
SN 0012-821X
PU Elsevier BV
VL 607
UT 000949925000001
DI 10.1016/j.epsl.2023.118054
ID 93566
ER

EF