{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/59650"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/59650","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Depth and orbital tuning : a new chronology of glaciation and nonlinear orbital climate change","abstract":"It is suggested that orbital tuning casts a false light upon the chronology of glaciation and the understanding of the climatic response to orbital variations. By developing a new age-model, independent of orbital assumptions, a significant non-linear response to orbital forcing becomes evident in the [delta] 18 0 record. The new age-model also indicates glacial terminations two through eight are 8,000 years older than the orbitally based estimates. A simple obliquity threshold model is presented which reproduces the timing, amplitude, and observed non-linearities of the [delta] 18 0 record; and supports the plausibility of the new age-model and the inferred non-linear climatic response.","abstract_html":"It is suggested that orbital tuning casts a false light upon the chronology of glaciation and the understanding of the climatic response to orbital variations. By developing a new age-model, independent of orbital assumptions, a significant non-linear response to orbital forcing becomes evident in the [delta] 18 0 record. The new age-model also indicates glacial terminations two through eight are 8,000 years older than the orbitally based estimates. A simple obliquity threshold model is presented which reproduces the timing, amplitude, and observed non-linearities of the [delta] 18 0 record; and supports the plausibility of the new age-model and the inferred non-linear climatic response.","abstract_has_math":false,"creators":["Huybers, Peter, 1974-"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences.","school":null,"contributors":[],"advisors":["Carl Wunsch."],"committee_chairs":[],"committee_members":[],"year":2002,"date_issued":"2002","date_published":"2002","updated_at":"2026-07-22T22:20:48Z","subjects":["Earth, Atmospheric, and Planetary Sciences."],"languages":["eng"],"rights":["M.I.T. theses are protected by copyright. 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By developing a new age-model, independent of orbital assumptions, a significant non-linear response to orbital forcing becomes evident in the [delta] 18 0 record. The new age-model also indicates glacial terminations two through eight are 8,000 years older than the orbitally based estimates. A simple obliquity threshold model is presented which reproduces the timing, amplitude, and observed non-linearities of the [delta] 18 0 record; and supports the plausibility of the new age-model and the inferred non-linear climatic response."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["S.M."]},{"key":"dc:title","label":"Title","values":["Depth and orbital tuning : a new chronology of glaciation and nonlinear orbital climate change"]}]}],"canonical_facts":{"dc:contributor.advisor":["Carl Wunsch."],"dc:contributor.department":["Massachusetts Institute of Technology. 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