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Climate of the Past An interactive open-access journal of the European Geosciences Union
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Volume 14, issue 5
Clim. Past, 14, 609-617, 2018
https://doi.org/10.5194/cp-14-609-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Clim. Past, 14, 609-617, 2018
https://doi.org/10.5194/cp-14-609-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 16 May 2018

Research article | 16 May 2018

Random and externally controlled occurrences of Dansgaard–Oeschger events

Johannes Lohmann and Peter D. Ditlevsen
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Objective extraction and analysis of statistical features of Dansgaard-Oeschger events
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Revised manuscript under review for CP
Short summary
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Subject: Climate Modelling | Archive: Ice Cores | Timescale: Millenial/D-O
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Cited articles  
Alley, R. B., Anandakrishnan, S., and Jung, P.: Stochastic Resonance in the North Atlantic, Paleoceanography, 16, 190–198, 2001.
Braun, H., Christl, M., Rahmstorf, S., Ganopolski, A., Mangini, A., Kubatzki, C., Roth, K., and Kromer, B.: Possible solar origin of the 1,470-year glacial climate cycle demonstrated in a coupled model, Nature, 438, 208–211, 2005.
Braun, H., Ganopolski, A., Christl, M., and Chialvo, D. R.: A simple conceptual model of abrupt glacial climate events, Nonlin. Processes Geophys., 14, 709–721, https://doi.org/10.5194/npg-14-709-2007, 2007.
Braun, H., Ditlevsen, P., Kurths, J., and Mudelsee, M.: Limitations of red noise in analysing Dansgaard-Oeschger events, Clim. Past, 6, 85–92, https://doi.org/10.5194/cp-6-85-2010, 2010.
Buizert, C. and Schmittner, A.: Southern Ocean control of glacial AMOC stability and Dansgaard-Oeschger interstadial duration, Paleoceanography, 30, 1595–1612, 2015.
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Short summary
The climate of the last glacial period was frequently interrupted by rapid warming events, the cause of which is still unknown. One open question is whether the occurrence of events is random or externally controlled. We studied the temporal characteristics of warm and cold phases using statistical null models and find that they are well described as random processes modulated by two different external climate factors. This may help distinguish physical mechanisms for rapid climate change.
The climate of the last glacial period was frequently interrupted by rapid warming events, the...
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