Jeong Jee-Hoon, Kim Min-Seok, Yoon Jin-Ho, Kim Hyungjun, Wang Shih-Yu Simon, Woo Sung-Ho, Linderholm Hans W
Department of Environment and Energy, Sejong University, Seoul, South Korea.
Department of Oceanography, Chonnam National University, Gwangju, South Korea.
Sci Adv. 2025 May 2;11(18):eadr7320. doi: 10.1126/sciadv.adr7320.
Since the late 20th century, an emerging atmospheric teleconnection pattern, the trans-Eurasian heatwave-drought train, has intensified remarkably during summer, correlating with a surge in concurrent heatwave-drought events from Eastern Europe to East Asia. Tree-ring proxies, spanning three centuries, reveal that the recent intensity of this pattern is unprecedented in the historical records. In contrast, the circumglobal teleconnection, which historically dominated the continental-scale Eurasian heatwave occurrences, has shown no discernible trend amid global warming. Consequently, this emerging pattern signifies a radical shift in Eurasian heatwave-drought climatologies. The mechanism involves Rossby wave propagation linked to warming sea surface temperatures in the Northwestern Atlantic and enhanced Sahel precipitation, both amplified recently by overlapping effects of anthropogenic warming and natural variability. Land-atmosphere interactions driven by soil moisture deficits further intensified the pattern regionally. Climate models predict that anthropogenic forcings will continue to strengthen the pattern throughout this century.
自20世纪后期以来，一种新兴的大气遥相关型态——跨欧亚热浪-干旱链，在夏季显著增强，与从东欧到东亚同期热浪-干旱事件的激增相关。跨越三个世纪的树木年轮代用资料显示，这种型态最近的强度在历史记录中是前所未有的。相比之下，历史上主导欧亚大陆尺度热浪发生的环绕全球遥相关，在全球变暖期间没有显示出明显趋势。因此，这种新兴型态标志着欧亚热浪-干旱气候的根本转变。其机制涉及与西北大西洋海表温度变暖以及萨赫勒地区降水增加相关的罗斯贝波传播，近期由于人为变暖和自然变率的重叠效应，二者都被放大。由土壤水分亏缺驱动的陆气相互作用在区域上进一步强化了这种型态。气候模型预测，人为强迫将在本世纪持续加强这种型态。
