Articles | Volume 15, issue 5
https://doi.org/10.5194/cp-15-1665-2019
https://doi.org/10.5194/cp-15-1665-2019
Research article
 | 
02 Sep 2019
Research article |  | 02 Sep 2019

Is there evidence for a 4.2 ka BP event in the northern North Atlantic region?

Raymond S. Bradley and Jostein Bakke

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Cited articles

Aagaard-Sørensen, S., Husum, K., Hald, M., Marchitto, T., and Godtliebsen, F.: Sub-sea surface temperatures in the Polar North Atlantic during the Holocene: Planktic foraminiferal Mg∕Ca temperature reconstructions, Holocene, 24, 93–103, 2014. 
Alley, R. B. and Anandakrishnan, S.: Variations in melt-layer frequency in the GISP2 ice core: implications for Holocene summer temperatures in central Greenland, Ann. Glaciol., 21, 64–70, 1995. 
Andersen, C., Koc, N., Jennings, A., and Andrews, J. T.: Nonuniform response of the major surface currents in the Nordic Seas to insolation forcing: implications for the Holocene climate variability, Paleoceanogr. Paleocl., 19, PA2003, https://doi.org/10.1029/2002P, 2004. 
Andersson, C., Pausata, F. S. R., Jansen, E., Risebrobakken, B., and Telford, R. J.: Holocene trends in the foraminifer record from the Norwegian Sea and the North Atlantic Ocean, Clim. Past, 6, 179–193, https://doi.org/10.5194/cp-6-179-2010, 2010. 
Andresen, C. S., Björck, S., Bennike, O., and Bond, G.: Holocene climate changes in southern Greenland: evidence from lake sediments, J. Quaternary Sci., 19, 783–795, 2004. 
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Short summary
We review paleoceanographic and paleoclimatic records from the northern North Atlantic to assess the nature of climatic conditions at 4.2 ka BP. There was a general decline in temperatures after ~ 5 ka BP, which led to the onset of neoglaciation. Although a few records do show a distinct anomaly around 4.2 ka BP (associated with a glacial advance), this is not widespread and we interpret it as a local manifestation of the overall climatic deterioration that characterized the late Holocene.