Radiocarbon as a thermocline proxy for the eastern equatorial Pacific
| Type | Article | ||||||||
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| Date | 2004-07 | ||||||||
| Language | English | ||||||||
| Author(s) | Rodgers Kb, Aumont O, Madec G, Menkes C, Blanke Bruno, Monfray P, Orr Jc, Schrag Dp | ||||||||
| Affiliation(s) | 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. |
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| Source | Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2004-07 , Vol. 31 , N. 14 , P. 1-4 | ||||||||
| DOI | 10.1029/2004GL019764 | ||||||||
| WOS© Times Cited | 28 | ||||||||
| Abstract | 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. | ||||||||
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