# Jeremy Shakun Back to [[Topics/Climate Change Science and Policy Debate/Climate Change Science and Policy Debate|Climate Change Science and Policy Debate]] · [[Topics/Climate Change Science and Policy Debate/Research and Evidence|Research and Evidence]] **Role:** Paleoclimatologist, Boston College; lead author of Shakun et al. 2012 on CO₂ and the last deglaciation. - Lead author of **Shakun et al. 2012, "Global warming preceded by increasing carbon dioxide concentrations during the last deglaciation"**, *Nature* 484:49 ([doi](https://doi.org/10.1038/nature10915)). - **Finding:** in a global stack of 80 proxy records, global temperature **lagged** CO₂. Antarctic warming led, driven by a bipolar seesaw in ocean circulation. - Clack cites this paper for "CO₂ acts as a feedback", which is true, but leaves out its headline. See the [[Users/@PeterDClack/Post Analyses/Post Analysis - PeterDClack on CO2 Lagging Temperature (2026-10-12)|CO₂ lag analysis]].