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Mixing State of Size-Selected Submicrometer Particles in the Arctic in May and September 2012

机译：2012年5月和9月北极地区按尺寸选择的亚微米颗粒的混合状态

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摘要

Aerosols have been associated with large uncertainties in estimates of the radiation budget and cloud formation processes in the Arctic. This paper reports the results of a study of in situ measurements of hygroscopicity, fraction of volatile species, mixing state, and off-line morphological and elemental analysis of Aitken and accumulation mode particles in the Arctic (Ny-Alesund, Svalbard) in May and September 2012. The accumulation mode particles were more abundant in May than in September. This difference was due to more air mass flow from lower latitude continental areas, weaker vertical mixing and less wet scavenging in May than in September, which may have led to a higher amount of long-range transport aerosols entering the Arctic in the spring. The Aitken mode particles observed intermittently in May were produced by nucleation, absent significant external mixing, whereas the accumulation mode particles displayed significant external mixing. The occurrence of an external mixing state was observed more often in May than in September and more often in accumulation mode particles than in Aitken mode particles, and it was associated more with continental air masses (Siberian) than with other air masses. The external mixing of the accumulation mode particles in May may have been caused by multiple sources (i.e., long-range transport aerosols with aging and marine aerosols). These groups of externally mixed particles were subdivided into different mixing structures (internal mixtures of predominantly sulfates and volatile organics without nonvolatile species and internal mixtures of sulfates and nonvolatile components, such as sea salts, minerals, and soot). The variations in the mixing states and chemical species of the Arctic aerosols in terms of their sizes, air masses, and seasons suggest that the continuous size-dependent measurements observed in this study are useful for obtaining better estimates of the effects of these aerosols on climate change.
机译：气溶胶与北极辐射预算和云形成过程的估计存在很大的不确定性。本文报告了5月和5月对北极（Ny-Alesund，Svalbard）的吸湿性，挥发性物种分数，混合状态以及离线Aitken和累积模式颗粒进行形态学和元素分析的现场测量结果。 2012年9月。5月份的累积模式粒子比9月份更为丰富。造成这种差异的原因是，与9月相比，5月与9月相比，来自低纬度大陆地区的空气流量增加，垂直混合较弱并且湿清除较少，这可能导致春季进入北极的远程运输气溶胶数量增加。在5月间断观察到的Aitken模式粒子是通过成核产生的，没有明显的外部混合，而聚集模式粒子则表现出明显的外部混合。 5月比9月观察到外部混合状态的频率更高，并且在累积模式颗粒中比在Aitken模式颗粒中更频繁地观察到，并且与大陆气团（西伯利亚）的关系比与其他气团的关系更多。 5月累积模式颗粒的外部混合可能是由多种来源引起的（即，随着时间推移而进行的远程运输气溶胶和海洋气溶胶）。这些外部混合的粒子细分为不同的混合结构（主要是硫酸盐和挥发性有机物的内部混合物，没有非挥发性物质，以及硫酸盐和非挥发性成分（例如海盐，矿物质和烟灰）的内部混合物）。北极气溶胶在其大小，空气质量和季节方面的混合状态和化学种类的变化表明，在这项研究中观察到的与尺寸有关的连续测量值有助于更好地估算这些气溶胶对气候的影响更改。

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  • 来源
    《Environmental Science & Technology》 |2014年第2期|909-919|共11页
  • 作者

    Kihong Park; Gibaek Kim; Jae-suk Kim; Young-Jim Yoon; Hee-joo Cho; Johan Stroem;

  • 作者单位

    National Leading Research Laboratory, School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-Gwagiro, Buk-gu, Gwangju, 500-712, Republic of Korea;

    National Leading Research Laboratory, School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-Gwagiro, Buk-gu, Gwangju, 500-712, Republic of Korea;

    National Leading Research Laboratory, School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-Gwagiro, Buk-gu, Gwangju, 500-712, Republic of Korea;

    Korea Polar Research Institute, Get-pearl Tower, SongDo Techno Park, 12 Gaetbeal-ro, Yeonsu-Gu, Incheon, 406-840, Republic of Korea;

    National Leading Research Laboratory, School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-Gwagiro, Buk-gu, Gwangju, 500-712, Republic of Korea;

    Department of Applied Environmental Science, Stockholm University, Svante Arrhenius vaeg 8, Stockholm, SE-11418, Sweden;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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