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| Rodgers, Kb; Aumont, O; Madec, G; Menkes, C; Blanke, Bruno; Monfray, P; Orr, Jc; Schrag, Dp. |
| 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... |
| Tipo: Text |
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| Ano: 2004 |
URL: https://archimer.ifremer.fr/doc/00000/10834/9261.pdf |
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