The Arctic environment has changed profoundly in recent decades. Aerosol particles are involved in numerous feedback mechanisms in the Arctic, e.g., aerosol-cloud/radiation interactions, which have important climatic implications. To understand changes in different Arctic aerosol types and number concentrations, we have performed a trend analysis of particle number size distributions, their properties, and their associated air mass history at Villum Research Station, northeastern Greenland, from 2010 to 2018. We found that, during spring, the total/ultrafine mode number concentration and the time air masses spent over the open ocean is significantly increasing, which can be ascribed to transport patterns changing to more frequent arrival from the ice-free Greenland Sea. We found that, during summer, the total/ultrafine mode number concentration, the occurrence of the Nucleation cluster (i.e. newly formed particles from gas to particle conversion), and the time air masses spent over the open ocean is significantly increasing. This can also be attributed to changing transport patterns, here with air masses arriving more frequently from Baffin Bay. Finally, we found that, during autumn, the ultrafine number concentration and the occurrence of the Pristine cluster (i.e. clean, natural Arctic background conditions) is significantly increasing, which is likely due to increasing amounts of accumulated precipitation along the trajectory path and decreasing time air masses spent above the mixed layer, respectively. Our results demonstrate that changing circulation and precipitation patterns are the factors predominantly affecting the trends in aerosol particle number concentrations and the occurrence of different aerosol types in northeastern Greenland.

近几十年来，北极环境发生了深刻变化。气溶胶粒子参与北极的许多反馈机制，例如气溶胶-云/辐射相互作用，这具有重要的气候影响。为了了解不同北极气溶胶类型和数量浓度的变化，我们对 2010 年至 2018 年格陵兰岛东北部 Villum 研究站的颗粒数量大小分布、它们的特性及其相关的气团历史进行了趋势分析。我们发现，在春季，总/超细模式数浓度和气团在公海上停留的时间显着增加，这可归因于运输模式改变为更频繁地从无冰的格陵兰海到达。我们发现，在夏季，总/超细模式数浓度，成核簇（即新形成的粒子从气体到粒子的转换），并且气团在公海上停留的时间显着增加。这也可以归因于运输模式的变化，这里的气团更频繁地从巴芬湾到达。最后我们发现，在秋季，超细数浓度和Pristine的出现星团（即清洁、自然的北极背景条件）正在显着增加，这可能是由于沿轨迹路径的累积降水量增加和气团在混合层上方停留的时间减少，分别。我们的研究结果表明，环流和降水模式的变化是影响格陵兰岛东北部气溶胶粒子数浓度趋势和不同气溶胶类型发生的主要因素。