Previous studies paid more attention on the winter‐mean relationship between the surface Arctic Oscillation (AO) and stratospheric ozone over the Arctic. However, few studies focused on the subseasonal relationship between the stratospheric ozone and surface AO in boreal winter. We investigated the subseasonal relationship between the AO and stratospheric ozone over the Arctic in each boreal winter month during 1980–2017 that is independent on the El Niño–Southern Oscillation and Quasi‐Biennial Oscillation signals using Modern‐Era Retrospective Analysis for Research and Applications version 2 reanalysis data sets. Results showed that the positive AO phases correspond to two negative anomalous ozone centers located in the middle stratosphere (∼30 hPa) and upper troposphere–lower stratosphere over the Arctic in each month. There is an in‐phase relationship between the AO and the Arctic ozone at 70–100 hPa in December, which is opposite to the out‐of‐phase relationship between these two metrics in mid‐to‐late winter. In December, the subtropical jet in the Pacific under the positive AO phase shifts poleward with strengthened planetary wavenumber‐2 waves in the lower stratosphere. The strengthened wavenumber‐2 wave flux contributes to the positive ozone anomalies at 70–100 hPa via modifying the asymmetric component of polar vortex. However, in January and February, the subtropical jet weakens during the positive AO years, along with less planetary wavenumber‐1 waves propagating into the Arctic lower stratosphere. This weakened wavenumber‐1 wave tends to result in the negative ozone anomalies via weakening the downwelling branch of Brewer–Dobson circulation and strengthening the stratospheric Arctic vortex.

中文翻译：

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冬季初中后期冬季北极涛动与平流层臭氧的对比关系

先前的研究更加关注地表北极涛动（AO）和北极平流层臭氧之间的冬季平均关系。但是，很少有研究集中在冬季北方平流层臭氧与地表AO之间的次季节关系。我们使用现代时代研究和应用回顾性分析版本，研究了1980-2017年每个寒冬月份北极地区AO与平流层臭氧之间的次季节关系，该关系独立于厄尔尼诺-南方涛动和准两年一次涛动信号。 2个重新分析数据集。结果表明，每个月正AO相对应于位于北极平流层中部（〜30 hPa）和对流层上空-平流层下层的两个负异常臭氧中心。在12月70-100 hPa时，AO与北极臭氧之间存在同相关系，这与冬季中后期冬季这两个指标之间的异相关系相反。12月，在正AO相的作用下，太平洋副热带急流向低空移动，平流层下部的行星波数-2波增强。通过改变极涡的不对称分量，增强的波数-2波通量有助于在70-100 hPa处产生正臭氧异常。但是，在1月和2月，副热带急流在AO正年期间减弱，并且传播到北极低平流层的行星波数-1波减少。