FN Archimer Export Format
PT J
TI Climate variability and ice-sheet dynamics during the last three glaciations
BT 
AF OBROCHTA, Stephen P.
   CROWLEY, Thomas J.
   CHANNELL, James E. T.
   HODELL, David A.
   BAKER, Paul A.
   SEKI, Arisa
   YOKOYAMA, Yusuke
AS 1:1;2:2;3:3;4:4;5:5;6:1;7:1;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 Univ Tokyo, Atmosphere & Ocean Res Inst, Tokyo 2778564, Japan.
   Braeheads Inst, Glasgow EH40 3DH, Lanark, Scotland.
   Univ Florida, Dept Geol Sci, Gainesville, FL 32611 USA.
   Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England.
   Duke Univ, Div Earth & Ocean Sci, Durham, NC 27708 USA.
C2 UNIV TOKYO, JAPAN
   BRAEHEADS INST, UK
   UNIV FLORIDA, USA
   UNIV CAMBRIDGE, UK
   UNIV DUKE, USA
IF 4.734
TC 46
UR https://archimer.ifremer.fr/doc/00289/40050/38793.pdf
   https://archimer.ifremer.fr/doc/00289/40050/38794.pdf
   https://archimer.ifremer.fr/doc/00289/40050/38795.kml
LA English
DT Article
CR IMAGES 1-MD101
BO Marion Dufresne
DE ;insolation;IRD;Heinrich Event;MIS 6;MIS 8;AMOC
AB A composite North Atlantic record from DSDP Site 609 and IODP Site U1308 spans the past 300,000 years and shows that variability within the penultimate glaciation differed substantially from that of the surrounding two glaciations. Hematite-stained grains exhibit similar repetitive down-core variations within the Marine Isotope Stage (MIS) 8 and 4-2 intervals, but little cyclic variability within the MIS 6 section. There is also no petrologic evidence, in terms of detrital carbonate-rich (Heinrich) layers, for surging of the Laurentide Ice Sheet through the Hudson Strait during MIS 6. Rather, very high background concentration of iceberg-rafted debris (IRD) indicates near continuous glacial meltwater input that likely increased thermohaline disruption sensitivity to relatively weak forcing events, such as expanded sea ice over deepwater formation sites. Altered (sub)tropical precipitation patterns and Antarctic warming during high orbital precession and low 65 degrees N summer insolation appear related to high abundance of Icelandic glass shards and southward sea ice expansion. Differing European and North American ice sheet configurations, perhaps aided by larger variations in eccentricity leading to cooler summers, may have contributed to the relative stability of the Laurentide Ice Sheet in the Hudson Strait region during MIS 6.
PY 2014
PD NOV
SO Earth And Planetary Science Letters
SN 0012-821X
PU Elsevier Science Bv
VL 406
UT 000344211200020
BP 198
EP 212
DI 10.1016/j.epsl.2014.09.004
ID 40050
ER

EF