YU-CHIAO LIANGMiyawaki, OsamuOsamuMiyawakiShaw, Tiffany A.Tiffany A.ShawMitevski, IvanIvanMitevskiPolvani, Lorenzo M.Lorenzo M.PolvaniHwang, Yen‐TingYen‐TingHwang2025-12-112025-12-112025-01-16https://www.scopus.com/pages/publications/85215529435https://scholars.lib.ntu.edu.tw/handle/123456789/734505Emission of anthropogenic greenhouse gases has resulted in greater Arctic warming compared to global warming, known as Arctic amplification (AA). From an energy-balance perspective, the current Arctic climate is in radiative-advective equilibrium (RAE) regime, in which radiative cooling is balanced by advective heat flux convergence. Exploiting a suite of climate model simulations with varying carbon dioxide ((Formula presented.)) concentrations, we link the northern high-latitude regime variation and transition to AA. The dominance of RAE regime in northern high-latitudes under (Formula presented.) reduction relates to stronger AA, whereas the RAE regime transition to non-RAE regime under (Formula presented.) increase corresponds to a weaker AA. Examinations on the spatial and seasonal structures reveal that lapse-rate and sea-ice processes are crucial mechanisms. Our findings suggest that if (Formula presented.) concentration continues to rise, the Arctic could transition into a non-RAE regime accompanied with a weaker AA.Arctic amplificationradiative-advective equilibriumjournal article10.1029/2024gl113417