Persistent influence of obliquity on ice age terminations since the Middle Pleistocene transition
Author
Bajo, P; Drysdale, RN; Woodhead, JD; Hellstrom, JC; Hodell, D; Ferretti, P; Voelker, AHL; Zanchetta, G; Rodrigues, T; Wolff, E; ...Date
2020-03-13Source Title
SciencePublisher
AMER ASSOC ADVANCEMENT SCIENCEUniversity of Melbourne Author/s
Drysdale, Russell; Woodhead, Jonathan; Bajo, Petra; Hellstrom, JohnAffiliation
School of Earth SciencesSchool of Geography
Metadata
Show full item recordDocument Type
Journal ArticleCitations
Bajo, P., Drysdale, R. N., Woodhead, J. D., Hellstrom, J. C., Hodell, D., Ferretti, P., Voelker, A. H. L., Zanchetta, G., Rodrigues, T., Wolff, E., Tyler, J., Frisia, S., Spotl, C. & Fallick, A. E. (2020). Persistent influence of obliquity on ice age terminations since the Middle Pleistocene transition. SCIENCE, 367 (6483), pp.1235-+. https://doi.org/10.1126/science.aaw1114.Access Status
Access this item via the Open Access locationOpen Access URL
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7324285Abstract
Radiometric dating of glacial terminations over the past 640,000 years suggests pacing by Earth's climatic precession, with each glacial-interglacial period spanning four or five cycles of ~20,000 years. However, the lack of firm age estimates for older Pleistocene terminations confounds attempts to test the persistence of precession forcing. We combine an Italian speleothem record anchored by a uranium-lead chronology with North Atlantic ocean data to show that the first two deglaciations of the so-called 100,000-year world are separated by two obliquity cycles, with each termination starting at the same high phase of obliquity, but at opposing phases of precession. An assessment of 11 radiometrically dated terminations spanning the past million years suggests that obliquity exerted a persistent influence on not only their initiation but also their duration.
Export Reference in RIS Format
Endnote
- Click on "Export Reference in RIS Format" and choose "open with... Endnote".
Refworks
- Click on "Export Reference in RIS Format". Login to Refworks, go to References => Import References