We investigated the impact of air mass origin on submicron particle size distributions and new particle formation (NPF) events using 10-year measurements at Gosan, Korea, in the Asian continental outflow. NPF events were identified on approximately 27.1% of total observation days, and 123 and 381 days of them were classified as strong and weak NPF days, respectively, based on the first-mode loading vectors and corresponding principal components in the cyclostationary empirical orthogonal function analysis. NPF events occurred less than 15% of the total observation days for the South China (SC), Pacific Ocean, and stagnation (ST) air mass sectors, whereas 33.1% (243 days out of total 734 observation days) were identified as NPF events for the air mass traveling from the North China (NC) sector. Consistently, the lowest mode diameter (50.5 nm), highest formation rate, and the lowest growth rate were found in the NC air mass sector. The highest mode diameter (89.8 nm) was observed at the SC air mass sector because of the coagulation of newly formed aerosols under relatively humid conditions during the transport in summer. The condensation sink for SC (10.70 ± 2.35 × 10−3 s−1) and ST (10.80 ± 4.24 × 10−3 s−1) was approximately 25% higher than that for the NC air mass sector.

中文翻译：

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2008-2018 年在韩国高山亚洲大陆流出中观察到的亚微米颗粒形成与气团历史之间的关系

我们使用在亚洲大陆流出的韩国高山的 10 年测量结果研究了气团起源对亚微米粒度分布和新粒子形成 (NPF) 事件的影响。根据循环平稳经验正交函数分析中的第一模态载荷向量和相应的主成分，在总观测天数的大约 27.1% 中确定了 NPF 事件，其中 123 天和 381 天分别被归类为强和弱 NPF 天数. NPF 事件发生在华南 (SC)、太平洋和停滞 (ST) 气团总观测天数的 15% 以下，而 33.1%（总共 734 个观测天数中的 243 天）被确​​定为 NPF 事件来自华北 (NC) 扇区的气团。一致地，最低模式直径（50.5 nm），在北卡罗来纳州的气团部门发现了最高的形成率和最低的增长率。由于夏季运输过程中在相对潮湿的条件下新形成的气溶胶凝结，在 SC 气团扇区观察到最高模式直径（89.8 nm）。SC (10.70 ± 2.35 × 10−3 s−1) 和 ST (10.80 ± 4.24 × 10−3 s−1) 的冷凝汇比 NC 气团部门的冷凝汇高约 25%。