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首页> 外文期刊>Atmospheric environment >The continuous field measurements of soluble aerosol compositions at the Taipei Aerosol Supersite, Taiwan
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The continuous field measurements of soluble aerosol compositions at the Taipei Aerosol Supersite, Taiwan

机译：台湾台北气溶胶超级站点的可溶性气溶胶成分的连续野外测量

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摘要

The characteristics of ambient aerosols, affected by solar radiation, relative humidity, wind speed, wind direction, and gas-aerosol interaction, changed rapidly at different spatial and temporal scales. In Taipei Basin, dense traffic emissions and sufficient solar radiation for typical summer days favored the formation of secondary aerosols. In winter, the air quality in Taipei Basin was usually affected by the Asian continental outflows due to the long-range transport of pollutants carried by the winter monsoon. The conventional filter-based method needs a long time for collecting aerosols and analyzing compositions, which cannot provide high time-resolution data to investigate aerosol sources, atmospheric transformation processes, and health effects. In this work, the in situ ion chromatograph (IC) system was developed to provide 15-min time-resolution data of nine soluble inorganic species (Cl~-, NO_2~-, NO_3~-, SO_4~(2-), Na~+ , NH_4~+, K~+ , Mg~(2+) and Ca~(2+)). Over 89% of all particles larger than approximately 0.056 μm were collected by the in situ IC system. The in situ IC system is estimated to have a limit of detection lower than 0.3 μgm~(-3) for the various ambient ionic components. Depending on the hourly measurements, the pollutant events with high aerosol concentrations in Taipei Basin were associated with the local traffic emission in rush hour, the accumulation of pollutants in the stagnant atmosphere, the emission of industrial pollutants from the nearby factories, the photochemical secondary aerosol formation, and the long-range transport of pollutants from Asian outflows.
机译：受太阳辐射，相对湿度，风速，风向和气溶胶相互作用影响的周围气溶胶特征在不同的空间和时间尺度上迅速变化。在台北盆地，典型夏季的密集交通排放和充足的太阳辐射有利于二次气溶胶的形成。在冬季，由于冬季风带来的污染物的长距离迁移，台北盆地的空气质量通常受到亚洲大陆外流的影响。传统的基于过滤器的方法需要很长时间来收集气溶胶和分析成分，这无法提供高时间分辨率的数据来研究气溶胶来源，大气转化过程和健康影响。在这项工作中，开发了原位离子色谱仪（IC）系统以提供15分钟的时间分辨数据，包括9种可溶性无机物（Cl〜-，NO_2〜-，NO_3〜-，SO_4〜（2-），Na 〜+，NH_4〜+，K〜+，Mg〜（2+）和Ca〜（2+））。通过原位IC系统收集了大于89％的所有大于约0.056μm的颗粒。对于各种环境离子组分，原位IC系统的检测极限估计低于0.3μgm〜（-3）。根据每小时的测量值，台北盆地高浓度气溶胶的污染物事件与高峰时段的当地交通排放，大气中污染物的积累，附近工厂的工业污染物的排放，光化学二次气溶胶有关形成，以及来自亚洲流出物的污染物的长距离运输。

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