Articles | Volume 16, issue 1
Clim. Past, 16, 265–282, 2020
Clim. Past, 16, 265–282, 2020

Research article 07 Feb 2020

Research article | 07 Feb 2020

Modal shift in North Atlantic seasonality during the last deglaciation

Geert-Jan A. Brummer et al.

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Cited articles

Balmaseda, M. A., Mogensen, K., and Weaver, A. T.: Evaluation of the ECMWF ocean reanalysis system ORAS4, Q. J. Roy. Meteorol. Soc., 139, 1132–1161, 2013. 
Bard, E.: Paleoceanographic implications of the difference in deep-sea sediment mixing between large and fine particles, Paleoceanography, 16, 235–239, 2001. 
Bard, E., Arnold, M., Duprat, J., Moyes, J., and Duplessy, J.-C.: Reconstruction of the last deglaciation: deconvolved records of δ18O profiles, micropaleontological variations and accelerator mass spectrometric 14C dating, Clim. Dynam., 1, 101–112, 1987. 
Bauch, D., Darling, K., Simstich, J., Bauch, H. A., Erlenkeuser, H., and Kroon, D.: Palaeoceanographic implications of genetic variation in living North Atlantic N. pachyderma, Nature, 424, 299–302, 2003. 
Berger, W. H.: Deep-sea carbonate and the deglaciation preservation spike in pteropods and foraminifera, Nature, 269, 301–304, 1977. 
Short summary
Here, mid-ocean seasonality is resolved through time, using differences in the oxygen isotope composition between individual shells of the commonly used (sub)polar planktonic foraminifera species in ocean-climate reconstruction, N. pachyderma and G. bulloides. Single-specimen isotope measurements during the deglacial period revealed a surprising bimodality, the cause of which was investigated.