eprintid: 10205595 rev_number: 7 eprint_status: archive userid: 699 dir: disk0/10/20/55/95 datestamp: 2025-03-04 14:25:54 lastmod: 2025-03-04 14:25:54 status_changed: 2025-03-04 14:25:54 type: article metadata_visibility: show sword_depositor: 699 creators_name: Barker, Stephen creators_name: Lisiecki, Lorraine E creators_name: Knorr, Gregor creators_name: Nuber, Sophie creators_name: Tzedakis, Polychronis C title: Distinct roles for precession, obliquity, and eccentricity in Pleistocene 100-kyr glacial cycles ispublished: pub divisions: UCL divisions: B03 divisions: C03 divisions: F26 note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. abstract: Identifying the specific roles of precession, obliquity, and eccentricity in glacial-interglacial transitions is hindered by imprecise age control. We circumvent this problem by focusing on the morphology of deglaciation and inception, which we show depends strongly on the relative phasing of precession versus obliquity. We demonstrate that although both parameters are important, precession has more influence on deglacial onset, whereas obliquity is more important for the attainment of peak interglacial conditions and glacial inception. We find that the set of precession peaks (minima) responsible for terminations since 0.9 million years ago is a subset of those peaks that begin (i.e., the precession parameter starts decreasing) while obliquity is increasing. Specifically, termination occurs with the first of these candidate peaks to occur after each eccentricity minimum. Thus, the gross morphology of 100-thousand-year (100-kyr) glacial cycles appears largely deterministic. date: 2025 date_type: published publisher: American Association for the Advancement of Science (AAAS) official_url: https://doi.org/10.1126/science.adp3491 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 2365696 doi: 10.1126/science.adp3491 medium: Print-Electronic lyricists_name: Tzedakis, Polychronis lyricists_id: PCTZE15 actors_name: Tzedakis, Polychronis actors_id: PCTZE15 actors_role: owner full_text_status: public publication: Science volume: 387 number: 6737 article_number: eadp3491 event_location: United States citation: Barker, Stephen; Lisiecki, Lorraine E; Knorr, Gregor; Nuber, Sophie; Tzedakis, Polychronis C; (2025) Distinct roles for precession, obliquity, and eccentricity in Pleistocene 100-kyr glacial cycles. Science , 387 (6737) , Article eadp3491. 10.1126/science.adp3491 <https://doi.org/10.1126/science.adp3491>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10205595/1/Barker%20et%20al_Revised_Round%202_combined.pdf