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Aerosol characteristics of different types of episode

机译：不同类型发作的气溶胶特征

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摘要

Daily and hourly average data from nine air-quality monitoring stations distributed across central Taiwan, which include ten items (i.e., PM_(10), PM_(2.5), wind direction, wind speed, temperature, relative humidity, SO_2, NO_2, NO, and CO), were collected from 2005 to 2009. Four episode types: long-range transport with dust storms (DS), long-range transport with frontal pollution (FP), river dust (RD), and stagnant weather (SW), and one mixed type of episode were identified. Of these four episode types, the SW was the dominant type, averaging about 70 %. The mean ratio of PM_(2.5)/PM_(10) was the lowest during the RD episodes (0.42), while the mean ratio of PM_(2.5)/PM_(10) was the highest during the SW episodes (0.64). Fine aerosol (PM_(2.5)) and coarse aerosol (PM_(10-2.5)) samples were collected by high-volume samplers for chemical composition analysis, from only three stations (Douliou, Lunbei, and Siansi) during the days of SW, RD, DS, and FP. The concentrations of PM_(2.5) and three ionic species (NH_4~+, NO_3~-, and SO_4~(2-)) all showed significant differences among the four episode types. The highest levels of NO_3~-(12.1 μg/m~3) and SO_4~(2-)) (20.5 μg/m~3) were found during the SW and FP episodes, respectively. A comparison on the spatial similarity of aerosol compositions among the episodes and/or non-episodes (control) was characterized by the coefficient of divergence (CD). The results showed higher CD values in PM_(10-2.5) than in PM_(2.5), and the CD values between RD episodes and the other three episodes were higher than those between two types of episode for the other three episodes. The ratios of SOR (sulfur oxidation ratio), SO_4~(2-)/EC (elemental carbon), NOR (nitrogen oxidation ratio), and NO_3~-/EC showed that sulfate formation was most rapid during the FP, while nitrate formation was most rapid during the SW.
机译：来自台湾中部的9个空气质量监测站的每日和每小时平均数据，包括十项（即PM_（10），PM_（2.5），风向，风速，温度，相对湿度，SO_2，NO_2，NO和CO）收集自2005年至2009年。四种情节类型：沙尘暴（DS）的远距离运输，额叶污染（FP），河尘（RD）和停滞天气（SW）的远距离运输，并确定了一种混合类型的发作。在这四种发作类型中，SW是主要类型，平均约占70％。 PM_（2.5）/ PM_（10）的平均比率在RD发作期间最低（0.42），而PM_（2.5）/ PM_（10）的平均比率在SW发作期间最高（0.64）。在西南地区，仅通过三个站点（斗六，伦贝和西安），通过大容量采样器收集了精细气溶胶（PM_（2.5））和粗气溶胶（PM_（10-2.5））样品， RD，DS和FP。 PM_（2.5）和三种离子种类（NH_4〜+，NO_3〜-和SO_4〜（2-））的浓度在四种情节类型之间均表现出显着差异。在SW和FP期间分别发现最高水平的NO_3〜-（12.1μg/ m〜3）和SO_4〜（2-））（20.5μg/ m〜3）。发作和/或非发作（对照）之间气溶胶成分空间相似性的比较以发散系数（CD）为特征。结果显示，PM_（10-2.5）中的CD值高于PM_（2.5），并且RD发作与其他三个发作之间的CD值高于其他三个发作中两种发作类型之间的CD值。 SOR（硫的氧化率），SO_4〜（2-）/ EC（元素碳），NOR（氮的氧化率）和NO_3〜-/ EC的比率表明，FP期间硫酸盐的形成最快，而硝酸盐的形成在西南地区最快。

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  • 来源
    《Environmental Monitoring and Assessment》 |2013年第12期|9777-9787|共11页
  • 作者

    Chung-Yih Kuo; Yan-Ruei Lin; Shih-Yu Chang; Chuan-Yao Lin; Chun-Hung Chou;

  • 作者单位

    Department of Public Health, College of Health Care and Management, Chung Shan Medical University, No. 110 Chien-Kuo N Rd., Sec. 1, Taichung, Taiwan 40242, Republic of China,Department of Family and Community Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan 40242, Republic of China;

    Department of Public Health, College of Health Care and Management, Chung Shan Medical University, No. 110 Chien-Kuo N Rd., Sec. 1, Taichung, Taiwan 40242, Republic of China;

    Department of Public Health, College of Health Care and Management, Chung Shan Medical University, No. 110 Chien-Kuo N Rd., Sec. 1, Taichung, Taiwan 40242, Republic of China;

    Research Center for Environmental Changes, Academia Sinica, Taipei 11529 Taiwan, Republic of China;

    Department of Public Health, College of Health Care and Management, Chung Shan Medical University, No. 110 Chien-Kuo N Rd., Sec. 1, Taichung, Taiwan 40242, Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Dust storms; Frontal pollution; River dust; Stagnant weather; Episodes;

    机译：沙尘暴;正面污染;河尘停滞的天气;集数;

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