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首页> 外文期刊>Environmental Science & Technology >Inland Sea Spray Aerosol Transport and Incomplete Chloride Depletion: Varying Degrees of Reactive Processing Observed during SOAS
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Inland Sea Spray Aerosol Transport and Incomplete Chloride Depletion: Varying Degrees of Reactive Processing Observed during SOAS

机译:内陆海雾气溶胶运输和氯化物消耗不完全:SOAS期间观察到的反应处理程度不同

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摘要

Multiphase reactions involving sea spray aerosol (SSA) impact trace gas budgets in coastal regions by acting as a reservoir for oxidized nitrogen and sulfur species, as well as being a source of halogen gases (HCl, ClNO_2 etc.). Whereas most studies of multiphase reactions on SSA have focused on marine environments, far less is known about SSA transported inland. Herein, single-particle measurements of SSA are reported at a site >320 km from the Gulf of Mexico, with transport times of 7-68 h. Samples were collected during the Southern Oxidant and Aerosol Study (SOAS) in June-July 2013 near Centreville, Alabama. SSA was observed in 93% of 42 time periods analyzed. During two marine air mass periods, SSA represented significant number fractions of particles in the accumulation (0.2-1.0 μm, 11%) and coarse (1.0-10.0 μm, 35%) modes. Chloride content of SSA particles ranged from full to partial depletion, with 24% of SSA particles containing chloride (mole fraction of Cl/Na > 0.1, 90% chloride depletion). Both the frequent observation of SSA at an inland site and the range of chloride depletion observed suggest that SSA may represent an underappreciated inland sink for NO_x/SO_2 oxidation products and a source of halogen gases.
机译:涉及海洋喷雾气溶胶(SSA)的多相反应通过充当氧化氮和硫物质的储存库以及卤素气体(HCl,ClNO_2等)的来源,影响沿海地区的痕量气体收支。尽管大多数关于SSA的多相反应研究都集中在海洋环境上,但对内陆运输SSA的了解却很少。在此,据报道,在距墨西哥湾> 320 km的站点上,SSA的单颗粒测量值为7-68 h。 2013年6月至7月,在阿拉巴马州Centreville附近进行的南部氧化剂和气溶胶研究(SOAS)中收集了样品。在分析的42个时间段中,有93%观察到了SSA。在两个海洋气团期间,SSA代表了累积模式(0.2-1.0μm,11%)和粗模式(1.0-10.0μm,35%)的大量颗粒。 SSA颗粒的氯化物含量范围从完全耗尽到部分耗尽,其中24%的SSA颗粒包含氯化物(Cl / Na的摩尔分数> 0.1,氯化物消耗90%)。在内陆站点经常观察到SSA以及观察到的氯化物消耗范围都表明,SSA可能代表NO_x / SO_2氧化产物和卤素气体源的内陆汇流不足。

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  • 来源
    《Environmental Science & Technology》 |2017年第17期|9533-9542|共10页
  • 作者单位

    Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States;

    Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States,State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China;

    Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States;

    Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States;

    Department of Chemistry, Tuskegee University, Tuskegee, Alabama 36088, United States;

    Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, United States;

    Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States;

    Departments of Chemistry and Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, Indiana 47907, United States;

    Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States,Department of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan 48109, United States;

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