Articles | Volume 15, issue 2
Clim. Past, 15, 781–793, 2019
https://doi.org/10.5194/cp-15-781-2019

Special issue: The 4.2 ka BP climatic event

Clim. Past, 15, 781–793, 2019
https://doi.org/10.5194/cp-15-781-2019

Research article 11 Apr 2019

Research article | 11 Apr 2019

Atmospheric blocking induced by the strengthened Siberian High led to drying in west Asia during the 4.2 ka BP event – a hypothesis

Aurel Perşoiu et al.

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Cited articles

Alley, R. B., Mayewski, P. A., Sowers, T., Stuiver, M., Taylor, K. C., and Clark, P. U.: Holocene climatic instability: A prominent, widespread event 8200 yr ago, Geology, 25, 483–486, 1997. 
Andresen, C. and Björck, S.: Holocene climate variability in the Denmark Strait region – a land-sea correlation of new and existing climate proxy records, Geogr. Ann. A, 87, 159–174, 2005. 
Arz, H. W., Lamy, F., and Pätzold, J.: A pronounced dry event recorded around 4.2 ka in brine sediments from the Northern Red Sea, Quaternary Res., 66, 432–441, 2006. 
Baker, J. L., Lachniet, M. S., Chervyatsova, O., Asmerom, Y., and Polyak, V. J.: Holocene warming in western continental Eurasia driven by glacial retreat and greenhouse forcing, Nat. Geosci., 10, 430–435, 2017. 
Balling, R., Michaels, P. J., and Knappenberger, P. C.: Analysis of winter and summer warming rates in gridded temperature time series, Clim. Res., 9, 175–181, 1998. 
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Short summary
We present a reconstruction of winter climate around 4.2 ka cal BP in Europe, west Asia, and northern Africa that shows generally low temperatures and heterogeneously distributed precipitation. We hypothesize that in the extratropical Northern Hemisphere the 4.2 ka BP event was caused by the strengthening and expansion of the Siberian High, which effectively blocked the moisture-carrying westerlies from reaching west Asia and also resulted in outbreaks of northerly cold and dry winds.