Arctic ship-based evidence of new particle formation events in the Chukchi and East Siberian Seas
Arctic ship-based evidence of new particle formation events in the Chukchi and East Siberian Seas
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DOI：
10.1016/j.atmosenv.2019.117232
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发表时间：
2020-02
影响因子：
5
通讯作者：
M. Dall’Osto;Ji Yeon Park;Jong Ho Kim;Sung-Ho Kang;Ki-Hark Park;D. Beddows;R. Harrison;Y. Yoon
中科院分区：
文献类型：
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作者：
M. Dall’Osto;Ji Yeon Park;Jong Ho Kim;Sung-Ho Kang;Ki-Hark Park;D. Beddows;R. Harrison;Y. Yoon
北极气溶胶与气候的相互作用受到多种因素的控制，包括颗粒的来源、过程和去除机制。北极主要是海洋，周围大部分是陆地，由于在海冰地区进行的测量很少，我们对北极气溶胶过程的了解并不完整。特别是，目前尚不清楚这些特定区域是否是主要或次要来源的气溶胶来源。我们提出了船基测量的新结果，表明海洋新粒子的产生和生长事件发生在楚科奇海和东西伯利亚海的公海和融化的海冰区域。我们报告了两个新的粒子形成事件，在这两个事件中，检测到最近形成的成核模式（<15 nm 直径），并观察到它慢慢成长为艾特肯模式（0.1–3.8 nm h−1）。我们的结果表明，海洋边界层中发生了新的颗粒形成，对研究区域的北极气溶胶种群做出了贡献，这是首次研究和报告。
Arctic aerosol-climate interactions are controlled by multiple factors including sources, processes and removal mechanisms of particles. The Arctic is mostly ocean, surrounded by mostly land, and our understanding of Arctic aerosol processes is incomplete due to scarce measurements carried out in sea ice regions. In particular, it is currently not known if these particular regions are sources of aerosols of primary or secondary origin. We present new results from ship-based measurements illustrating that marine new particle production and growth events occur in open ocean and melting sea ice regions in the Chukchi and East Siberian Seas. We report two new particle formation events during which a recently formed nucleation mode (<15 nm diameter) is detected and is observed to slowly grow into an Aitken mode (0.1–3.8 nm h−1). Our results suggest that new particle formation occurs in the marine boundary layer contributing to the Arctic aerosol population in the study region for the first time studied and herein reported.