Tree growth synchrony serves as a valuable ecological indicator of forest resilience to climate stress and disturbances. However, our understanding of how increasing temperature affects tree growth synchrony during rapidly and slowly warming periods in ecosystems with varying climatic conditions remains limited. By using tree-ring data from temperate broadleaf ( Fraxinus mandshurica , Phellodendron amurense , Quercus mongolica , and Juglans mandshurica ) and Korean pine ( Pinus koraiensis ) mixed forests in northeast China, we investigated the effects of climate change, particularly warming, o...