Articles | Volume 15, issue 5
Clim. Past, 15, 1771–1792, 2019
https://doi.org/10.5194/cp-15-1771-2019
Clim. Past, 15, 1771–1792, 2019
https://doi.org/10.5194/cp-15-1771-2019
Research article
27 Sep 2019
Research article | 27 Sep 2019

Objective extraction and analysis of statistical features of Dansgaard–Oeschger events

Johannes Lohmann and Peter D. Ditlevsen

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Cited articles

Bereiter, B., Eggleston, S., Schmitt, J., Nehrbass-Ahles, C., Stocker, T. F., Fischer, H., Kipfstuhl, S., and Chappellaz, J.: Revision of the EPICA Dome CO2 record from 800 to 600 kyr before present, Geophys. Res. Lett., 42, 542–549, 2015a. a
Bereiter, B., Eggleston, S., Schmitt, J., Nehrbass-Ahles, C., Stocker, T. F., Fischer, H., Kipfstuhl, S., and Chappellaz, J. A.: Antarctic Ice Cores Revised 800 KYr CO2 Data, available at: https://www.ncdc.noaa.gov/paleo-search/study/17975, Version date: 4 February 2015, 2015b. 
Boch, R., Cheng, H., Spötl, C., Edwards, R. L., Wang, X., and Häuselmann, Ph.: NALPS: a precisely dated European climate record 120–60 ka, Clim. Past, 7, 1247–1259, https://doi.org/10.5194/cp-7-1247-2011, 2011. a
Boers, N.: Early-warning signals for Dansgaard-Oeschger events in a high-resolution ice core record, Nat. Comm., 9, 2556, https://doi.org/10.1038/s41467-018-04881-7, 2018. a
Buizert, C. and Schmittner, A.: Southern Ocean control of glacial AMOC stability and Dansgaard-Oeschger interstadial duration, Paleoceanography, 30, 1595–1612, 2015. a, b, c, d
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Short summary
Greenland ice core records show that the climate of the last glacial period was frequently interrupted by rapid warming events, followed by cooling episodes of vastly different duration. We fit a generic waveform to the noisy ice core record in order to extract a robust climate signal and empirically study what controls the amplitude and duration of the warmings and coolings. We find that cooling transitions are more predictable than warmings and are influenced by different climate forcings.