1. ABOUT THE DATASET -------------------- Title: Creator(s): Brooke Snoll [1], Ruza Ivanovic [1], Lauren J Gregoire [1], Sam Sherriff-Tadano [2], Yvan Rome [1] Organisation(s): 1. School of Earth and Environment, University of Leeds, Leeds, UK 2. Department of Physics and Earth Sciences, University of the Ryukyus, Nishihara, Okinawa Prefecture, Japan Rights-holder(s):Unless otherwise stated, Copyright 2024 University of Leeds Publication Year: 2025 Description: Model data from HadCM3 general circulation model simulations. Simulations are sensitivity experiments built off of Rome et al.'s (2022) 20.7k experiment with Last Glacial Maximum conditions (CO2, orbit, and ice sheet configuration). These simulations use the same set-up but CO2 concentration or orbital configuration is changed. Cite as: Related publication: Snoll et al., (2025) Competing effects of sea ice change control the pace and amplitude of millennial-scale climate oscillations. Critical Insights in Climate Change. (Accepted) Contact: [b.snoll@leeds.ac.uk] 2. TERMS OF USE --------------- [This dataset is licensed under a Creative Commons Attribution 4.0 International Licence: https://creativecommons.org/licenses/by/4.0/.] 3. PROJECT AND FUNDING INFORMATION ---------------------------------- Funding organisation: Leeds-York-Hull Natural Environment Research Council (NERC) Doctoral Training Partnership (DTP) Panorama Grant no.:  NE/S007458/1 4. METHODS ---------- See Snoll et al. (2025) Critical Insights in Climate Change.