On the mid-Pleistocene transition to 100-kyr glacial cycles and the asymmetry between glaciation and deglaciation times
By Eli Tziperman, H. Gildor. 2003
190 citations recorded by the source corpus.
[1] A mechanism is proposed for the mid-Pleistocene transition from a dominant periodicity of 41 kyr to 100 kyr in glacial oscillations. The same mechanism is shown to also explain the asymmetry between the long glaciation and short deglaciation phases of each cycle since that transition versus the symmetry of the 41-kyr oscillations prior to the transition. These features arise naturally within the framework of the sea-ice switch glacial cycle mechanism of Gildor and Tziperman [2000] as a result of the gradual cooling of the deep ocean during the Pleistocene. This cooling results in a change of the relation between atmospheric temperature and the rates of accumulation and ablation of continentals ice sheets. It is this latter change that leads to the activation of the sea-ice switch and therefore to the initiation of the 100-kyr oscillations. The gradual glaciation and rapid deglaciations during these oscillations occur because the mean value of the ice sheet ablation is not far from the maximum rate of snow accumulation during warm periods. This proximity of mean ablation and maximum accumulation rates is shown to be also a consequence of the mid-Pleistocene gradual cooling of the deep ocean. INDEX TERMS: 3344 Meteorology and Atmospheric Dynamics: Paleoclimatology; 1620 Global Change: Climate dynamics (3309); 1640 Global Change: Remote sensing; 4267 Oceanography: General: Paleoceanography; KEYWORDS: climate dynamics, glacial cycles, mid-Pleistocene transition, 100 kyr, 41 kyr
Subfields: Anthropology, Atmospheric Science, Oceanography
View Paper: https://www.semanticscholar.org/paper/c117e1e6ea63a46f9975dd00cb0a75a63d9d7751
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Atmospheric Science
In Oceanography
Citations in the corpus
- Mid-Pleistocene revolution and the ‘eccentricity myth’ (2005, background): “In one version of this, Gildor & Tziperman (2000) and Tziperman & Gildor (2003) suggest that long term cooling of the deep ocean during the Pleistocene alters the relationship between atmospheric temperature and accumulation rates of snow on continental ice sheets and the growth of sea ice.”