Light‐absorbing particles over the Tibetan Plateau (TP) can accelerate glacial retreat, thus causing a series of serious environmental and social problems. Previous studies mainly focus on seasonal transport of aerosols over the TP, while the potential factors influencing the subseasonal variation in airborne black carbon (BC) are almost ignored. In this study, the Weather Research and Forecasting coupled with chemistry (WRF‐Chem) model and multiple observations are used to investigate the impacts of East Asian atmospheric circulation on BC aerosol over the TP in winter. Results show that the weakness of westerly wind over northern TP, acceleration of westerly wind over southern TP, and eastward shift of East Asia major trough are responsible for the high BC concentration over east slope of the TP. In this circumstance, more BC from northern India can be transported to eastern TP and the south slopes of the TP by the enhanced westerly wind. The intensified southwesterly wind over eastern TP brings more BC from the Sichuan Basin to northeastern TP. The BC can also penetrate to eastern TP in planetary boundary layer. Subsequently, the weakened westerly wind over northern TP and positive anomalous updrafts over east slope of the TP support the accumulation and uplift of BC. Another circulation mode is opposite to the pattern above and results in low BC concentration over the TP. These two circulation modes are possibly associated with the low‐level meridional temperature anomaly over East Asia, which modulates the upper level atmospheric circulation through the transient eddy feedback.

中文翻译：

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冬季两种东亚大气环流模式对青藏高原黑碳气溶胶的影响

青藏高原（TP）上的吸光颗粒会加速冰川退缩，从而引起一系列严重的环境和社会问题。先前的研究主要集中在气溶胶在TP上的季节性运输，而影响机载黑碳（BC）的亚季节变化的潜在因素几乎被忽略。在这项研究中，使用天气研究与预报结合化学（WRF-Chem）模型和多次观测来研究东亚大气环流对冬季TP上BC气溶胶的影响。结果表明，TP北部的西风弱，TP南部的西风加速以及东亚大槽的东移是造成TP东坡上高BC集中的原因。在这种情况下，通过增强的西风，更多的来自印度北部的卑诗省可以被运输到TP的东部和TP的南坡。TP东南部的西南风增强，使从四川盆地到东北TP的BC增多。卑诗省也可以穿透行星边界层中的东部TP。随后，TP北部的西风减弱，TP东坡上的正异常上升气流支持了BC的堆积和隆升。另一种循环模式与上述模式相反，导致整个TP的BC浓度较低。这两种环流模式可能与东亚的低层子午温度异常有关，后者通过瞬态涡流反馈调节高层大气环流。