FN Archimer Export Format
PT J
TI Mg/Ca ratios in the planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northern North Atlantic/Nordic Seas
BT 
AF MELAND, MY
   JANSEN, E
   ELDERFIELD, H
   DOKKEN, TM
   OLSEN, A
   BELLERBY, RGJ
AS 1:1,2;2:2;3:3;4:1;5:1,4;6:1,4;
FF 1:;2:;3:;4:;5:;6:;
C1 Bjerknes Ctr Climate Res, N-5007 Bergen, Norway.
   Univ Bergen, Dept Earth Sci, N-5007 Bergen, Norway.
   Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England.
   Univ Bergen, Inst Geophys, N-5007 Bergen, Norway.
C2 BCCR, NORWAY
   UNIV BERGEN, NORWAY
   UNIV CAMBRIDGE, UK
   UNIV BERGEN, NORWAY
IF 2.384
TC 28
UR https://archimer.ifremer.fr/doc/00234/34559/33319.pdf
LA English
DT Article
CR IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
BO Marion Dufresne
DE ;planktonic foraminifera;N. pachyderma (sin.);Mg/Ca;paleothermometry;paleoceanography;Nordic Seas
AB In core top samples in the Nordic Seas, Mg/Ca ratios of N. pachyderma ( sin.) are generally consistent with previous high-latitude calibration data but do not reflect the modern calcification temperature gradient from 2 degrees C in the northwest to 8 degrees C in the southeast. This is because Mg/Ca ratios in foraminiferal shells from the central Nordic Seas are similar to 0.4 mmol/mol higher than expected from calibrations of Nurnberg ( 1995) and Elderfield and Ganssen ( 2000). The enhanced Mg/Ca ratios are observed in an area with low sedimentation rates (< similar to 5 cm/kyr). Possible factors that may cause this include bioturbation, Holocene variability in old core tops, dissolution, pore water chemistry, occurrence of volcanic ash, and other natural variability. The enhanced foraminiferal Mg/Ca ratios in areas of the Nordic Seas and the northern North Atlantic may also be linked with secondary factors related to the presence of fresher and colder water masses, possibly combined with pore water chemistry in low-sedimentation areas differing from high-sedimentation areas.
PY 2006
PD JUL
SO Geochemistry Geophysics Geosystems
SN 1525-2027
PU Amer Geophysical Union
VL 7
IS 6
UT 000238569600002
BP 1
EP 18
DI 10.1029/2005GC001078
ID 34559
ER

EF