Development and Comparison of Air Pollution Exposure Surfaces Derived from On-Road Mobile Monitoring and Short-Term Stationary Sidewalk Measurements
Development and Comparison of Air Pollution Exposure Surfaces Derived from On-Road Mobile Monitoring and Short-Term Stationary Sidewalk Measurements
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DOI：
10.1021/acs.est.7b05059
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发表时间：
2018-03-20
影响因子：
11.4
通讯作者：
Hatzopoulou, Marianne
中科院分区：
文献类型：
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作者：
Minet, Laura;Liu, Rick;Hatzopoulou, Marianne
空气污染物的土地利用回归（LUR）模型经常是在短期固定或移动监测方法的基础上开发的，这就提出了这两种数据收集方案是否会导致类似的暴露面。在这项研究中，我们测量了2016年夏季多伦多的超细颗粒（UFP）和黑碳（BC）浓度，使用了两种短期数据收集方法：移动数据收集，涉及3023个骑自行车的道路段，以及固定数据收集，涉及92个人行道位置。我们为两种污染物和测量方案开发了四个LUR模型和暴露面。决定系数（R-2）为0.434 ~ 0.525。移动LUR中包含了各种小规模流量变量。移动表面和固定表面的Pearson相关系数分别为0.23和0.49。我们还通过同一时期在多伦多进行的一项小组研究中的个人暴露来比较这两个表面。个人暴露量不同于GPS信息与暴露面结合得到的室外暴露量。对于UFP，个人户外暴露的中位数为26 344 part/cm(3)，而自行车和固定表面的中位数分别为31 201和19 057 part/cm(3)。在BC中观察到类似的趋势，中位暴露量为1764 ng/m（个人），1799 ng/m（循环）和1469 ng/m(3)（平稳）。
Land-use regression (LUR) models of air pollutants are frequently developed on the basis of short-term stationary or mobile monitoring approaches, which raises the question of whether these two data collection protocols lead to similar exposure surfaces. In this study, we measured ultrafine particles (UFP) and black carbon (BC) concentrations in Toronto during summer 2016, using two short-term data collection approaches: mobile, involving 3023 road segments sampled on bicycles, and stationary, involving 92 sidewalk locations. We developed four LUR models and exposure surfaces, for the two pollutants and measurement protocols. Coefficients of determination (R-2) varied from 0.434 to 0.525. Various small-scale traffic variables were included in the mobile LUR. Pearson correlation coefficients between the mobile and stationary surfaces were 0.23 for UFP and 0.49 for BC. We also compared the two surfaces using personal exposures from a panel study in Toronto conducted during the same period. The personal exposures differed from the outdoor exposures derived from the combination of GPS information and exposure surfaces. For UFP, the median for personal outdoor exposure was 26 344 part/cm(3), while the cycling and stationary surfaces predicted medians of 31 201 and 19 057 part/cm(3). Similar trends were observed for BC, with median exposures of 1764 (personal), 1799 (cycling), and 1469 ng/m(3) (stationary).