The changes in the East Asian polar‐front jet (EAPJ) and the East Asian subtropical jet (EASJ) profoundly impact the weather and climate in East Asia. However, the link between aerosols and the jet streams is still unclear. Here, we investigated the decadal co‐variation of aerosols and the East Asian jet streams in the boreal winter during the period of 1980–2019. In synch with a positive change in aerosol optical depth over East Asia, 300‐hPa winds show an equatorward shift of the land branch of the EASJ, and weakened EAPJ and oceanic branch of the EASJ. This can be linked to the enhanced meridional temperature gradient along 30°–50° N but weakened in northern regions and the decreasing synoptic‐scale transient eddy kinetic energy over subtropical Pacific. Relative importance estimation of aerosols and ocean signals emphasized the contributions of aerosols in jet variations. In turn, meteorological conditions related to jet streams also contribute to variations in aerosols, the decadal co‐variations are a result of their interactions, particularly for the oceanic branch of EASJ. The findings would be helpful in providing potential indicators of climate change.

中文翻译：

---

北半球冬季东亚上空气溶胶和东亚急流的年代际共同变化

东亚极锋急流（EAPJ）和东亚副热带急流（EASJ）的变化深刻影响着东亚地区的天气和气候。然而，气溶胶和急流之间的联系仍不清楚。在这里，我们研究了 1980-2019 年北半球冬季气溶胶和东亚急流的年代际变化。与东亚气溶胶光学深度正向变化同步，300hPa风显示EASJ陆地分支向赤道移动，EAPJ和EASJ海洋分支减弱。这可能与北纬 30°–50° 地区经向温度梯度增强但北部地区减弱以及副热带太平洋天气尺度瞬变涡动能下降有关。气溶胶和海洋信号的相对重要性估计强调了气溶胶在射流变化中的贡献。反过来，与急流相关的气象条件也会导致气溶胶的变化，十年间的共同变化是它们相互作用的结果，特别是对于 EASJ 的海洋分支。这些发现将有助于提供气候变化的潜在指标。