FN Archimer Export Format
PT J
TI Reduced oxygenation at intermediate depths of the southwest Pacific during the last glacial maximum
BT 
AF DURAND, Axel
   CHASE, Zanna
   NOBLE, Taryn L.
   BOSTOCK, Helen
   JACCARD, Samuel L.
   TOWNSEND, Ashley T.
   BINDOFF, Nathaniel L.
   NEIL, Helen
   JACOBSEN, Geraldine
AS 1:1;2:1;3:1;4:2;5:3,4;6:5;7:1,6,7,8,10;8:2;9:9;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;
C1 Univ Tasmania, Inst Marine & Antarctic Studies, Hobart, Tas, Australia.
   Natl Inst Water & Atmospher Res, Wellington, New Zealand.
   Univ Bern, Inst Geol Sci, Bern, Switzerland.
   Univ Bern, Oeschger Ctr Climate Change Res, Bern, Switzerland.
   Univ Tasmania, Cent Sci Lab, Hobart, Tas, Australia.
   Antarctic Climate & Ecosyst Cooperat Res Ctr, Hobart, Tas, Australia.
   Marine Atmospher Res, Commonwealth Sci & Ind Res Org, Hobart, Tas, Australia.
   Collaborat Australian Weather & Climate Res, Melbourne, Vic, Australia.
   Australian Nucl Sci & Technol Org, Lucas Heights, NSW, Australia.
   Australian Res Council, Ctr Excellence Climate Syst Sci, Sydney, NSW, Australia.
C2 UNIV TASMANIA, AUSTRALIA
   NIWA, NEW ZEALAND
   UNIV BERN, SWITZERLAND
   UNIV BERN, SWITZERLAND
   UNIV TASMANIA, AUSTRALIA
   ACE CRC, AUSTRALIA
   CSIRO, AUSTRALIA
   CAWCR, AUSTRALIA
   ANSTO, AUSTRALIA
   AUSTRALIAN RES COUNCIL, AUSTRALIA
IF 4.637
TC 10
UR https://archimer.ifremer.fr/doc/00495/60703/83612.pdf
LA English
DT Article
CR IMAGES 3-IPHIS-MD106
   MD 152 / MATACORE
BO Marion Dufresne
DE ;oceanic deoxygenation;redox sensitive elements;ventilation;Antarctic Intermediate Water;New Zealand;circulation changes
AB To investigate changes in oxygenation at intermediate depths in the southwest Pacific between the Last Glacial Maximum (LGM) and the Holocene, redox sensitive elements uranium and rhenium were measured in 12 sediment cores located on the Campbell and Challenger plateaux offshore from New Zealand. The core sites are currently bathed by Subantarctic Mode Water (SAMW), Antarctic Intermediate Water (AAIW) and Upper Circumpolar Deep Water (UCDW). The sedimentary distributions of authigenic uranium and rhenium reveal reduced oxygen content at intermediate depths (800-1500 m) during the LGM compared to the Holocene. In contrast, data from deeper waters (>= 1500 m) indicate higher oxygen content during the LGM compared to the Holocene. These data, together with variations in benthic foraminiferal delta C-13, are consistent with a shallower AAIW-UCDW boundary over the Campbell Plateau during the LGM. Whilst AAIW continued to bathe the intermediate depths (<= 1500 m) of the Challenger Plateau during the LGM, the data suggest that the AAIW at these core sites contained less oxygen compared to the Holocene. These results are at odds with the general notion that AAIW was better oxygenated and expanded deeper during the LGM due to stronger westerlies and colder temperatures. These findings may be explained by an important change in AAIW formation and circulation. 
PY 2018
PD JUL
SO Earth And Planetary Science Letters
SN 0012-821X
PU Elsevier Science Bv
VL 491
UT 000432499200006
BP 48
EP 57
DI 10.1016/j.epsl.2018.03.036
ID 60703
ER

EF