The Dansgaard-Oeschger cycles of the last glacial period represent alternation between two climate states, with rapid transitions from one state to the other.
Notes on verification
Confirmed by multiple independent peer-reviewed sources (PNAS/PMC, arXiv papers, Springer review) describing D-O cycles as bimodal alternation between stadial/interstadial states with decadal-scale rapid transitions. Minor nuance exists regarding asymmetry of warming vs cooling transitions (sawtooth pattern), but core claim is well corroborated.
Sources
- Climate change - Abrupt Changes, Earth History, Impacts (britannica.com)
- https://pmc.ncbi.nlm.nih.gov/articles/PMC10483664/ (pmc.ncbi.nlm.nih.gov)
- https://arxiv.org/pdf/nlin/0505031 (arxiv.org)
- https://arxiv.org/pdf/2101.08050 (arxiv.org)
- https://link.springer.com/rwe/10.1007/978-1-4020-4411-3_55 (link.springer.com)