FN Archimer Export Format
PT J
TI Constraints on ocean circulation at the Paleocene-Eocene Thermal Maximum from neodymium isotopes
BT 
AF ABBOTT, April N.
   HALEY, Brian A.
   TRIPATI, Aradhna K.
   FRANK, Martin
AS 1:1,6;2:1,2;3:3,4,5;4:2;
FF 1:;2:;3:;4:;
C1 OSU, CEOAS, 104 CEOAS Adm Bldg, Corvallis, OR 97209 USA.
   GEOMAR Helmholtz Ctr Ocean Res Kiel, Wischhofstr 1-3, D-24148 Kiel, Germany.
   Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Dept Earth & Space Sci, Los Angeles, CA 90095 USA.
   Univ Calif Los Angeles, Inst Environm & Sustainabil, Los Angeles, CA 90095 USA.
   Univ Brest, European Inst Marine Sci IUEM, UMR 6538, Domaines Ocean, Rue Dumont DUrville, Plouzane, France.
   Macquarie Univ, Dept Earth & Planetary Sci, Sydney, NSW 2109, Australia.
C2 OSU, USA
   IFM GEOMAR, GERMANY
   UNIV CALIF LOS ANGELES, USA
   UNIV CALIF LOS ANGELES, USA
   UBO, FRANCE
   UNIV MACQUARIE, AUSTRALIA
UM LGO
IF 3.543
TC 10
UR https://archimer.ifremer.fr/doc/00639/75106/75520.pdf
   https://archimer.ifremer.fr/doc/00639/75106/75521.pdf
   https://archimer.ifremer.fr/doc/00639/75106/75522.zip
LA English
DT Article
AB Global warming during the Paleocene Eocene Thermal Maximum (PETM) similar to 55 million years ago (Ma) coincided with a massive release of carbon to the ocean atmosphere system, as indicated by carbon isotopic data. Previous studies have argued for a role of changing ocean circulation, possibly as a trigger or response to climatic changes. We use neodymium (Nd) isotopic data to reconstruct short high-resolution records of deep -water circulation across the PETM. These records are derived by reductively leaching sediments from seven globally distributed sites to reconstruct past deep-ocean circulation across the PETM. The Nd data for the leachates are interpreted to be consistent with previous studies that have used fish teeth Nd isotopes and benthic foraminiferal delta C-13 to constrain regions of convection. There is some evidence from combining Nd isotope and delta C-13 records that the three major ocean basins may not have had substantial exchanges of deep waters. If the isotopic data are interpreted within this framework, then the observed pattern may be explained if the strength of overturning in each basin varied distinctly over the PETM, resulting in differences in deep -water aging gradients between basins. Results are consistent with published interpretations from proxy data and model simulations that suggest modulation of overturning circulation had an important role for initiation and recovery of the ocean atmosphere system associated with the PETM. 
PY 2016
SO Climate Of The Past
SN 1814-9324
PU Copernicus Gesellschaft Mbh
VL 12
IS 4
UT 000376073100003
BP 837
EP 847
DI 10.5194/cp-12-837-2016
ID 75106
ER

EF