Articles | Volume 15, issue 1
Clim. Past, 15, 25–40, 2019
https://doi.org/10.5194/cp-15-25-2019

Special issue: The 4.2 ka BP climatic event

Clim. Past, 15, 25–40, 2019
https://doi.org/10.5194/cp-15-25-2019

Research article 08 Jan 2019

Research article | 08 Jan 2019

The onset of neoglaciation in Iceland and the 4.2 ka event

Áslaug Geirsdóttir et al.

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Cited articles

Aabel NG software package, available at: http://www.gigawiz.com/ (last access: August 2018), 2016. 
Andersen, C., Koç, N., Jennings, A. E., and Andrews, J. T.: Nonuniform response of the major surface currents in the Nordic Seas to insolation forcings: implications for the Holocene climate variability, Paleoceanography, 19, 1–16, 2004. 
Anderson, L. S., Flowers, G. E., Jarosch, A. H., Aðalgeirsdóttir, G. Th., Geirsdóttir, Á., Miller, G. H., Harning, D. J., Þorsteinsson, Þ., Magnússon, E., and Pálsson, F.: Holocene glacier and climate variations in Vestfirðir, Iceland, from the modeling of Drangajökull ice cap, Quaternary Sci. Rev., 190, 39–56, 2018. 
Antoniades, D., Giralt, S., Geyer, A., Alvarez-Valero, A. M., Pla-Rabes, S., Granados, I., Liu, E. J., Toro, M., Smellie, J. L., and Oliva, M.: The timing and widespread effects of the largest Holocene volcanic eruption in Antarctica, Scientific Reports, 8, 17279, https://doi.org/10.1038/s41598-018-35460-x, 2018. 
Arnalds, O.: The Icelandic “Rofabard” soil erosion features, Earth Surf. Proc. Land., 25, 17–28, 2000. 
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Short summary
Compositing climate proxies in sediment from seven Iceland lakes documents abrupt summer cooling between 4.5 and 4.0 ka, statistically indistinguishable from 4.2 ka. Although the decline in summer insolation was an important factor, a combination of superposed changes in ocean circulation and explosive Icelandic volcanism were likely responsible for the abrupt perturbation recorded by our proxies. Lake and catchment proxies recovered to a colder equilibrium state following the perturbation.