FN Archimer Export Format
PT J
TI Mg/Ca and Sr/Ca ratios in planktonic foraminifera: Proxies for upper water column temperature reconstruction
BT 
AF CLEROUX, Caroline
   CORTIJO, Elsa
   ANAND, Pallavi
   LABEYRIE, Laurent
   BASSINOT, Franck
   CAILLON, Nicolas
   DUPLESSY, Jean-Claude
AS 1:1;2:1;3:2;4:1;5:1;6:1;7:1;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 UVSQ, CNRS, CEA, Lab Mixte,IPSL,Lab Sci Climat & Environm, F-91198 Gif Sur Yvette, France.
   Open Univ, Dept Earth & Environm Sci, Milton Keynes MK7 6AA, Bucks, England.
C2 LSCE, FRANCE
   UNIV OPEN, UK
IF 3.626
TC 116
UR https://archimer.ifremer.fr/doc/00237/34806/33325.pdf
LA English
DT Article
CR IMAGES 1-MD101
   MD 126 / MONA
   MD 127 / PAGE
BO Marion Dufresne
AB [1] Reliable temperature estimates from both surface and subsurface ocean waters are needed to reconstruct past upper water column temperature gradients and past oceanic heat content. This work examines the relationships between trace element ratios in fossil shells and seawater temperature for surface-dwelling foraminifera species, Globigerinoides ruber (white) and Globigerina bulloides, and deep-dwelling species, Globorotalia inflata, Globorotalia truncatulinoides (dextral and sinistral) and Pulleniatina obliquiloculata. Mg/Ca and Sr/Ca ratios in shells picked in 29 modern core tops from the North Atlantic Ocean are calibrated using calculated isotopic temperatures. Mg/Ca ratios on G. ruber and G. bulloides agree with published data and relationships. For deep- dwelling species, Mg/Ca calibration follows the equation Mg/Ca = 0.78 (+/- 0.04) x exp (0.051 (+/- 0.003) x T) with a significant correlation coefficient of R-2 = 0.74. Moreover, there is no significant difference between the different deep- dwellers analyzed. For the Sr/Ca ratio, the surface dwellers and P. obliquiloculata do not record any temperature dependence. For the Globorotalia species, the thermo dependence of Sr/Ca ratio can be described by a single linear relationship: Sr/Ca = ( 0.0182 (+/- 0.001) x T) + 1.097 (+/- 0.018), R-2 = 0.85. Temperature estimates with a 1 sigma error of +/- 2.0 degrees C and +/- 1.3 degrees C can be derived from the Mg/Ca and Sr/Ca ratios, respectively, as long as the Sr geochemistry in the ocean has been constant through time.
PY 2008
PD AUG
SO Paleoceanography
SN 0883-8305
PU Amer Geophysical Union
VL 23
IS 3 / PA3214
UT 000258825000001
BP 1
EP 16
DI 10.1029/2007PA001505
ID 34806
ER

EF