Articles | Volume 14, issue 7
https://doi.org/10.5194/cp-14-1079-2018
https://doi.org/10.5194/cp-14-1079-2018
Research article
 | 
25 Jul 2018
Research article |  | 25 Jul 2018

Thermocline state change in the eastern equatorial Pacific during the late Pliocene/early Pleistocene intensification of Northern Hemisphere glaciation

Kim Alix Jakob, Jörg Pross, Christian Scholz, Jens Fiebig, and Oliver Friedrich

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Cited articles

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Anand, P., Elderfield, H., and Conte, M. H.: Calibration of Mg  Ca thermometry in planktonic foraminifera from a sediment trap time series, Paleoceanography, 18, 1050, https://doi.org/10.1029/2002PA000846, 2003. 
Bahr, A., Nürnberg, D., Schönfeld, J., and Garbe-Schönberg, D.: Hydrological variability in Florida Straits during Marine Isotope Stage 5 cold events, Paleoceanography, 26, PA2214, https://doi.org/10.1029/2010PA002015, 2011. 
Bailey, I., Hole, G. M., Foster, G. L., Wilson, P. A., Storey, C. D., Trueman, C. N., and Raymo, M. E.: An alternative suggestion for the Pliocene onset of major northern hemisphere glaciation based on the geochemical provenance of North Atlantic Ocean ice-rafted debris, Quaternary Sci. Rev., 75, 181–194, 2013. 
Barker, S., Greaves, M., and Elderfield, H.: A study of cleaning procedures used for foraminiferal Mg  Ca paleothermometry, Geochem. Geophy. Geosy., 4, 8407, https://doi.org/10.1029/2003GC000559, 2003. 
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Short summary
Eastern equatorial Pacific (EEP) thermocline dynamics during the intensification of Northern Hemisphere glaciation (iNHG; ~ 2.5 Ma) currently remain unclear. In light of this uncertainty, we generated geochemical, faunal and sedimentological data for EEP Site 849 (~ 2.75–2.4 Ma). We recorded a thermocline depth change shortly before the final phase of the iNHG, which supports the hypothesis that tropical thermocline shoaling may have contributed to substantial Northern Hemisphere ice growth.