Wave trains propagating across Eurasia at both high and low latitudes in winter are key to the climate variation over East Asia via modulating the cold surge and moisture supply, with different configurations inducing diverse impacts. In this study, the combined impacts of the Eurasian (EU) pattern and South Asian jet wave train (SAJW) at a 10–30-day timescale are compared when they work in phase (indices of same signs) and out of phase (indices of opposite signs). Different configuration is defined by considering whether they induce a concurrent or reversing center of action over East Asia–Japan. The in-phase configuration induces a strong outbreak of the East Asian winter monsoon by intensifying the East Asian trough. In contrast, the out-of-phase configuration restricts the cold air over North China and enhances the moisture supply from the low latitudes by intensifying the India-Burma (now Myanmar) trough and an anomalous anticyclone over East Asia-the western North Pacific, inducing abnormal precipitation over Southwest and North China. In in-phase configuration, the EU pattern and SAJW are excited by abnormal disturbances over the western North Atlantic. The disturbance energy splits over Europe and joins over East Asia, intensifying the East Asian trough concurrently. In out-of-phase configuration, the two teleconnections do not share a common upstream source; they develop individually over the eastern North Atlantic in high and subtropical latitudes. They join north of the Bay of Bengal, resulting in a deepened India-Burma trough and an onward western North Pacific anticyclone anomaly. Both the EU pattern and SAJW influence the East Asian trough and the India-Burma trough in different configurations mainly via the advection of abnormal vorticity along wave trains by the subtropical westerly jet stream, with the anticyclonic Rossby wave source and Beta effect playing a negative role.

冬季在欧亚高纬度和低纬度地区传播的波列通过调节冷潮和水汽供应而成为东亚气候变化的关键，不同的配置会产生不同的影响。在这项研究中，比较了欧亚（EU）模式和南亚急流波列（SAJW）在10-30天的时间尺度上同相（相同符号的指数）和异相（相同符号的指数）工作时的综合影响。相反的符号）。不同的配置是通过考虑它们是否在东亚-日本上引起同时或反向的行动中心来定义的。同相配置通过增强东亚槽而引发东亚冬季风的强烈爆发。相比之下，异相配置通过加强印缅（现缅甸）低压槽和东亚-北太平洋西部上空的异常反气旋，限制了华北上空的冷空气，并增强了来自低纬度地区的水汽供应。导致西南、华北地区降水异常。在同相配置中，EU 模式和 SAJW 受到北大西洋西部异常扰动的激发。扰动能量在欧洲上空分裂并在东亚上空汇合，同时加剧了东亚低谷。在异相配置中，两个遥连接不共享公共上游源；它们在北大西洋东部的高纬度和副热带地区单独发展。它们在孟加拉湾北部汇合，导致印度-缅甸海槽加深，以及北太平洋西部反气旋异常。 EU模式和SAJW对东亚槽和印缅槽的不同构型影响主要是通过副热带西风急流沿波列的异常涡度平流作用，其中反气旋罗斯贝波源和Beta效应起负面作用。