Sea spray aerosol (SSA) and lake spray aerosol (LSA) from wave breaking contribute to particulate matter (PM) in coastal regions near oceans and freshwater lakes, respectively. However, SSA and LSA contributions to atmospheric aerosol populations in inland regions are poorly understood because of difficulties differentiating them from other inland sources when using bulk particle measurements. Herein, we show that SSA and LSA episodically contribute to atmospheric aerosol populations at a rural site in northern Michigan >700 and >25 km from the nearest seawater and Great Lakes sources, respectively. During July 2014, individual SSA and LSA particles were identified by single-particle mass spectrometry and electron microscopy and then combined with air mass trajectory analysis for source apportionment. SSA comprised up to 33 and 20% of PM mass (0.5–2.0 μm) during two multiday transport events from Hudson Bay and a 3% average background outside these periods. LSA transported from Lake Michigan reached a maximum of 7% of PM mass (0.5–2 μm) during a daylong high-wind event and contributed a 3% average background during the remainder of the study. The observation of SSA and LSA transported inland motivates further studies of the impacts of wave breaking particles on cloud formation and air quality at inland locations far from marine and freshwater sources.

中文翻译：

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海喷雾和湖喷雾气溶胶对内陆颗粒物的意外贡献

破波产生的海浪气溶胶（SSA）和湖浪气溶胶（LSA）分别导致海洋和淡水湖附近沿海地区的颗粒物（PM）。但是，由于使用散装颗粒测量法很难将SSA和LSA与其他内陆来源区分开来，因此对内陆地区大气气溶胶种群的贡献知之甚少。在此，我们表明，SSA和LSA分别在距最近的海水和大湖水源> 700和> 25 km的密歇根州北部的一个农村地点，对大气气溶胶种群做出了贡献。2014年7月，通过单颗粒质谱和电子显微镜鉴定了单个SSA和LSA颗粒，然后结合空气质量轨迹分析进行源分配。在从哈德逊湾进行的两天多天的运输事件中，SSA分别占到了33％和20％的PM质量（0.5–2.0μm），而这段时期以外的平均背景为3％。在为期一天的大风事件中，从密歇根湖运来的LSA最高达到了PM质量的7％（0.5–2μm），在其余研究中贡献了3％的平均背景。SSA和LSA内陆运输的观察促使进一步研究碎波颗粒对远离海洋和淡水源的内陆地区的云形成和空气质量的影响。5–2μm）在为期一整天的大风事件中发生，并在其余研究中贡献了3％的平均背景。SSA和LSA内陆运输的观察促使进一步研究碎波颗粒对远离海洋和淡水源的内陆地区的云形成和空气质量的影响。5–2μm）在一天的大风事件中发生，并在其余研究中贡献了3％的平均背景。SSA和LSA内陆运输的观察促使进一步研究碎波颗粒对远离海洋和淡水源的内陆地区的云形成和空气质量的影响。