The DO-climate events are probably noise induced: statistical investigation of the claimed 1470 years cycle

The significance of the apparent 1470 years cycle in the recurrence of the Dansgaard-Oeschger (DO) events, observed in the Greenland ice cores, is debated. Here we present statistical significance tests of this periodicity. The detection of a periodicity relies strongly on the accuracy of the dating...

Full description

Bibliographic Details
Published in:Climate of the Past
Main Authors: Ditlevsen, P. D., Andersen, K. K., Svensson, A.
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2007
Subjects:
article
Verlagsveröffentlichung
Greenland
Greenland ice cores
NGRIP
Online Access:https://doi.org/10.5194/cp-3-129-2007
https://noa.gwlb.de/receive/cop_mods_00032624
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032578/cp-3-129-2007.pdf
https://cp.copernicus.org/articles/3/129/2007/cp-3-129-2007.pdf
Description
Summary:The significance of the apparent 1470 years cycle in the recurrence of the Dansgaard-Oeschger (DO) events, observed in the Greenland ice cores, is debated. Here we present statistical significance tests of this periodicity. The detection of a periodicity relies strongly on the accuracy of the dating of the DO events. Here we use both the new NGRIP GICC05 time scale based on multi-parameter annual layer counting and the GISP2 time scale where the periodicity is most pronounced. For the NGRIP dating the recurrence times are indistinguishable from a random occurrence. This is also the case for the GISP2 dating, except in the case where the DO9 event is omitted from the record.

Similar Items