FN Archimer Export Format
PT J
TI Beryllium isotope variations recorded in the Adélie Basin, East Antarctica reflect Holocene changes in ice dynamics, productivity, and scavenging efficiency
BT 
AF Behrens, Bethany C.
   Yokoyama, Yusuke
   Miyairi, Yosuke
   Sproson, Adam D.
   Yamane, Masako
   Jimenez-Espejo, Francisco J.
   McKay, Robert M.
   Johnson, Katelyn M.
   Escutia, Carlota
   Dunbar, Robert B.
AS 1:1,2;2:1,2,3,4,5;3:1;4:1,4;5:6;6:4,7;7:8;8:8,9;9:7;10:10;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 Atmosphere and Ocean Research Institute, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8564, Japan
   Graduate Program on Environmental Science, University of Tokyo, Komaba, Meguro, Tokyo, 153-0041, Japan
   Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Hongo, Bunkyō, Tokyo, 113-8654, Japan
   Biogeochemistry Research Center, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Natsushimacho, Yokosuka, Kanagawa Prefecture, 237-0061, Japan
   Research School of Physics, The Australian National University, Acton ACT, 2601, Australia
   Institute for Space-Earth Environmental Research, Nagoya University, Furocho, Chikusa, Nagoya, Aichi, 464-8601, Japan
   Andalusian Earth Sciences Institute (IACT), CSIC-University of Granada, Armilla, Spain
   Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand
   GNS Science, National Ice Core Research Laboratory, Lower Hutt, New Zealand
   School of Earth, Energy, and Environmental Sciences, Stanford University, Stanford, CA, USA
C2 UNIV TOKYO, JAPAN
   UNIV TOKYO, JAPAN
   UNIV TOKYO, JAPAN
   JAMSTEC, JAPAN
   UNIV AUSTRALIAN NATL, AUSTRALIA
   UNIV NAGOYA, JAPAN
   CSIC, SPAIN
   UNIV VICTORIA, NEW ZEALAND
   GNS SCIENCE, NEW ZEALAND
   UNIV STANFORD, USA
TC 1
UR https://archimer.ifremer.fr/doc/00766/87821/93372.pdf
LA English
DT Article
CR MD 130 / CADO
BO Marion Dufresne
DE ;Holocene;East Antarctica;Cosmogenic nuclides;Beryllium isotopes;Scavenging
AB The Adélie Basin is a relatively small (∼1600 km2), semi-enclosed continental shelf bathymetric depression located adjacent to the Wilkes Subglacial Basin, a basin underlying a sector of the East Antarctic Ice Sheet that contains ∼3–4 meters sea level equivalent of ice. Located within the Adélie Basin is a ∼184 m thick laminated sediment deposit, the Adélie Drift, ideal for examining regional changes in ice sheet and ocean dynamics. Here, we examine the ratio of reactive beryllium-10 to reactive beryllium-9 ((10Be/9Be)reac) in a marine sediment core obtained from the Adélie Drift to assess these changes during the Holocene epoch (11.7 ka BP to present). The (10Be/9Be)reac record provides insight into changes in freshwater input, primary productivity, and scavenging efficiency, while removing the influence of particle size on 10Be concentration. During the early Holocene, (10Be/9Be)reac ratios indicate increased meltwater discharge from ca. 11.7 to 10 ka BP, as grounded ice retreated from the Adélie Basin and adjacent bathymetric highs. After ∼10 ka BP, beryllium isotopes are influenced by scavenging efficiency and dilution controlled by ocean currents and accumulation rate, operating alongside meltwater input, suggesting there are additional factors to consider when using (10Be/9Be)reac as a proxy for ice shelf cover and glacial dynamics. 
PY 2022
PD JUN
SO Quaternary Science Advances
SN 2666-0334
PU Elsevier BV
VL 7
UT 000903540300002
DI 10.1016/j.qsa.2022.100054
ID 87821
ER

EF