In contrast to the rapid warming of the climate, there is growing evidence to indicate that no significant trend exists in the snow cover/depth over the western Tibetan Plateau in recent decades. Here, by analyzing multiple sources of observational and reanalysis data, we address the possible interannual connection between the mid-west Tibetan Plateau (MWTP) snow depth and Arctic sea ice. Results indicate that a robust and coherent variation exists between the winter Barents Sea ice concentration and the MWTP snow depth; that is, a positive anomaly of the former can enhance the meridional air temperature gradient to the south and hence accelerate the polar-front westerly jet. As a result, an anomalous Rossby wave propagating upward and equatorward generates, resulting in a dipole pattern of the atmospheric circulation anomaly over the polar region and the Eurasian continent. The anticyclonic circulation anomaly, corresponding to the south center of the dipole pattern, weakens the subtropical westerly jet and forms a southeast wind climbing the MWTP, which enhances the zonal advection and meridional convergence of the atmospheric moisture flux over the MWTP, and hence facilitates the MWTP snowfall. The interannual variation of the Barents Sea ice and the MWTP snow depth are therefore closely connected through the atmospheric bridge effect of the westerly jet and Rossby wave.

与气候的迅速变暖相反，越来越多的证据表明，近几十年来，西部青藏高原的积雪/深度没有明显的趋势。在这里，通过分析观测和再分析数据的多种来源，我们解决了青藏高原中西部（MWTP）雪深与北极海冰之间可能的年际联系。结果表明，冬季巴伦支海冰浓度和MWTP积雪深度之间存在强烈而连贯的变化。也就是说，前者的正异常会增强子午线向南的气温梯度，从而加速极地前西风急流。结果，异常的罗斯比波向上传播并向赤道传播，导致极区和欧亚大陆大气环流异常的偶极子模式。与偶极子模式的南中心相对应的反气旋环流异常减弱了亚热带西风急流并形成了东南向风爬升的MWTP，这增强了MWTP上的纬向平流和子午向辐合，从而促进了MWTP的发展。 MWTP降雪。因此，Barents海冰的年际变化和MWTP雪深通过西风急流和Rossby波的大气桥效应紧密相连。这增强了MWTP上大气水分通量的纬向平流和经向收敛性，从而促进了MWTP降雪。因此，Barents海冰的年际变化和MWTP雪深通过西风急流和Rossby波的大气桥效应紧密相连。这增强了MWTP上大气水分通量的纬向平流和经向收敛性，从而促进了MWTP降雪。因此，Barents海冰的年际变化和MWTP雪深通过西风急流和Rossby波的大气桥效应紧密相连。