This paper presents the climatology of downslope windstorms in the Russian Arctic – bora on Novaya Zemlya, windstorms on Spitsbergen, in Tiksi and Pevek, bora on Wrangel Island – in connection with the large-scale circulation. Statistical analysis of wind speed and air temperature during windstorms, the frequency of the phenomenon, as well as analysis of trends in frequency and intensity of downslope windstorms in the late 20th and early 21st centuries were carried out. Similarity of the large-scale background (incoming) flow is evident for all regions; the most frequent features of the incoming flow are elevated inversion and low-tropospheric jet stream. The observed transformation of the incoming flow from weak to strong windstorm along with the relatively weak linear correlation between downslope wind speed and upwind-side flow characteristics suggest that there are nonlinear connections between windstorms and the incoming flow. We found significant negative trends in Wrangel Island bora frequency and intensity, connected largely with the Arctic circulation variability and associated sea-ice loss. A negative trend in intensity of windstorms was also found in Tiksi and Pevek, associated more with midlatitudes circulation patterns.

本文介绍了与大环流有关的俄罗斯北极下坡暴风的气候学-Novaya Zemlya的bora，Tiksi的Spitsbergen和Weve的Pevek的暴风雨。进行了暴风雨期间的风速和气温的统计分析，现象的发生频率，以及20世纪末和21世纪初的下坡暴风雨的频率和强度趋势分析。大规模背景（传入）流在所有区域都相似。进入流的最常见特征是反演和低对流层射流升高。观察到的从弱暴风到强暴风的入流转换，以及下坡风速和上风侧流特征之间相对较弱的线性相关性，表明在暴风雨和入风之间存在非线性关系。我们发现弗兰格尔岛的波拉频率和强度存在明显的负趋势，这主要与北极环流的变化和相关的海冰损失有关。在提克西和佩维克也发现了暴风烈度的负面趋势，更多与中纬度环流模式有关。