FN Archimer Export Format PT J TI Radiocarbon as a thermocline proxy for the eastern equatorial Pacific BT AF RODGERS, KB AUMONT, O MADEC, G MENKES, C BLANKE, Bruno MONFRAY, P ORR, JC SCHRAG, DP AS 1:;2:;3:;4:;5:;6:;7:;8:; FF 1:;2:;3:;4:;5:;6:;7:;8:; C1 Univ Paris 06, LODYC, MNHN, IRD,CNRS, F-75252 Paris 05, France. UBO, IFREMER, CNRS, Lab Phys Oceans, F-29285 Brest, France. UPS, IRD, CNES, CNRS,Lab Etud Geophys & Oceanog Spatiales, F-31401 Toulouse 4, France. CEA Saclay, LSCE, CNRS, F-91191 Gif Sur Yvette, France. Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA. C2 UNIV PARIS 06, FRANCE UNIV BRETAGNE OCCIDENTALE, FRANCE UPS, FRANCE CEA, FRANCE HARVARD UNIV, USA SI UBO SE PDG-DRO-UMLPO IN WOS Ifremer jusqu'en 2018 copubli-univ-france IF 2.378 TC 28 UR https://archimer.ifremer.fr/doc/00000/10834/9261.pdf LA English DT Article AB An ocean model is used to test the idea that sea surface Delta(14)C behaves as a thermocline proxy in the eastern equatorial Pacific. The ORCA2 model, which includes Delta(14)C as a passive tracer, has been forced with reanalysis fluxes over 1948-1999, and the output is compared with a previously reported Galapagos Delta(14)C record. The model reproduces the abrupt increase in the seasonally minimum Delta(14)C in 1976/77 found in the data. This increase is associated with neither a shift of thermocline depth over the NINO3 region, nor a change in the relative proportion of Northern/Southern source waters. Rather, it is due to a decrease in the Sub-Antarctic Mode Water (SAMW) component of the upwelling water, thereby representing a decrease in entrainment of water from below the base of the directly ventilated thermocline. PY 2004 PD JUN SO Geophysical Research Letters SN 0094-8276 PU Amer Geophysical Union VL 31 IS 14 UT 000223185300001 BP 1 EP 4 DI 10.1029/2004GL019764 ID 10834 ER EF