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首页> 外文期刊>Environmental Science & Technology >Real-Time Detection and Mixing State of Methanesulfonate in Single Particles at an Inland Urban Location during a Phytoplankton Bloom
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Real-Time Detection and Mixing State of Methanesulfonate in Single Particles at an Inland Urban Location during a Phytoplankton Bloom

机译：浮游植物开花期间内陆城市位置单颗粒中甲磺酸盐的实时检测和混合状态

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摘要

Dimethyl sulfide (DMS), produced by oceanic phytoplankton, is oxidized to form methanesulfonic acid (MSA) and sulfate, which influence particle chemistry and hygroscopicity. Unlike sulfate, MSA has no known anthropogenic source making it a useful tracer for ocean-derived biogenic sulfur. Despite numerous observations of MSA, predominately in marine environments, the production pathways of MSA have remained elusive highlighting the need for additional measurements, particularly at inland locations. During the Study of Organic Aerosols in Riverside, CA from July-August 2005, MSA was detected in submicrometer and supermicrometer particles using real-time, single-particle mass spectrometry. MSA was detected due to blooms of DMS-producing organisms along the California coast The detection of MSA depended on both the origin of the sampled air mass as well as the concentration of oceanic chlorophyll present MSA was mainly mixed with coastally emitted particle types implying that partitioning of MSA occurred before transporttt Riverside. Importantly, panicles containing vanadium had elevated levels of MSA compared to particles not containing vanadium, suggesting a possible catalytic role of vanadium in MSA formation. This study demonstrates how anthropogenic, metal-containing aerosols can enhance the atmospheric processing of biogenic emissions, which needs to be considered when modeling coastal as well as urban locations.
机译：海洋浮游植物产生的二甲基硫醚（DMS）被氧化形成甲磺酸（MSA）和硫酸盐，这会影响颗粒的化学性质和吸湿性。与硫酸盐不同，MSA没有已知的人为来源，使其成为海洋来源的生物硫的有效示踪剂。尽管对MSA的观察很多，但主要是在海洋环境中，MSA的生产途径仍然难以捉摸，这凸显了需要进行额外测量的需求，尤其是在内陆地区。在2005年7月至8月于加利福尼亚州里弗赛德进行的有机气溶胶研究期间，使用实时单粒子质谱法检测了亚微米和超微米颗粒中的MSA。检测到MSA是由于加利福尼亚沿海地区产生DMS的生物大量繁殖所致。MSA的检测取决于采样空气的起源以及所存在的海洋叶绿素的浓度。MSA主要与沿海排放的颗粒类型混合，这意味着分区MSA发生在运输河滨之前。重要的是，与不含钒的颗粒相比，含钒的穗具有较高的MSA水平，表明钒在MSA形成中可能具有催化作用。这项研究表明，人为的，含金属的气溶胶如何增强大气对生物排放的处理，在对沿海和城市位置进行建模时需要考虑这一点。

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  • 来源
    《Environmental Science & Technology》 |2010年第5期|p.1566-1572|共7页
  • 作者

    CASSANDRA J. GASTON; rnKERRI A. PRATT; XUEYING QIN; KIMBERLY A. PRATHER;

  • 作者单位

    Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093;

    rnDepartment of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093 Atmospheric Science and Global Change Division, Pacific Northwest National Laboratory, Richland, WA99352 USA;

    rnDepartment of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093 Kansas Department of Health and Environment, Topeka, KS 66612 USA;

    rnScripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093 Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093;

  • 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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