Recently, extreme heatwaves have frequently concurrently swept across Europe and East Asia, causing severe cascading socioeconomic consequences. However, the nonlinear synchronization relationship between these heatwaves and their underlying physical mechanisms remains poorly understood. Utilizing the event synchronization climate network method, atmospheric dynamic diagnostics, and numerical experiments, we revealed robust synchronization between heatwaves over Europe and East Asia, strongly associated with dry soil moisture conditions over the Tibetan Plateau from the preceding winter to summer. Dry soil moisture triggers an equivalent barotropic anticyclone north of the Tibetan Plateau, coinciding with the subtropical westerly jet waveguide and initiating circumglobal atmospheric Rossby waves propagating westward and eastward. Consequently, an equivalent barotropic anticyclone develops over Europe. These anticyclones induce simultaneous heatwaves across Europe and East Asia by increasing downward solar radiation and adiabatic sinking, amplified by positive land-atmosphere feedback. Our findings significantly enhance the understanding and predictive capabilities of these synchronous heatwaves across Eurasia.

最近，极端热浪经常同时席卷欧洲和东亚，造成了严重的级联社会经济后果。然而，这些热浪与其潜在物理机制之间的非线性同步关系仍然知之甚少。利用事件同步气候网络方法、大气动力学诊断和数值实验，我们揭示了欧洲和东亚热浪之间的强同步性，这与青藏高原从前一个冬季到夏季的干燥土壤水分条件密切相关。干燥的土壤水分在青藏高原以北触发等效的气压反气旋，与副热带西风急流波导重合，并引发向西和向东传播的全球大气罗斯比波。因此，一个等效的嗜气反气旋在欧洲上空发展。这些反气旋通过增加向下的太阳辐射和绝热下沉，同时在欧洲和东亚引发热浪，并被积极的陆地-大气反馈放大。我们的研究结果显着增强了对欧亚大陆这些同步热浪的理解和预测能力。