The rationality of PM2.5 monitoring sites’ locations based on exposure level across eastern China
The rationality of PM2.5 monitoring sites’ locations based on exposure level across eastern China
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基于华东地区暴露水平的PM2.5监测点位设置的合理性
DOI：
10.1088/2515-7620/ac4641
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发表时间：
2021-12
影响因子：
2.9
通讯作者：
Fumo Yang
中科院分区：
文献类型：
--
作者：
Chang Yan;Guangming Shi;Fumo Yang
抽象的。由于PM2.5和人群分布的异质性，利用监测数据评估人群暴露情况时，现有监测点的代表性存在疑问。通过比较中国高空气污染物（CHAP）卫星数据集的PM2.5浓度、有监测站（UWS）和无监测站（UNS）城市地区的人口和暴露水平，讨论了目前中国东部地区监测站空间覆盖的合理性。通过对中国东部256个地级市所有城区空气污染分析发现，UNS 2015年和2018年PM2.5平均浓度分别为52.26 μg m−3和41.32 μg m−3，略低于UWS（52.98 μg m−3和41.48 μg m−3）。约 12.1% 的地级市在某些 UNS 中的暴露水平高于 UWS。随着UNS人口的较快增长，UNS和UWS的暴露水平之间的差距正在缩小。因此，目前普遍采用的以行政为主的选址原则，未来可能存在较大的漏掉PM2.5暴露水平相对较高的非首都城市地区的风险。
Abstract. Due to the heterogeneity of PM2.5 and population distribution, the representativeness of existing monitoring sites is questionable when the monitored data were used to assess the population exposure. By comparing the PM2.5 concentration from a satellite-based dataset named the China High Air Pollutants (CHAP), population and exposure level in urban areas with monitoring stations (UWS) and without monitoring stations (UNS), we discussed the rationality of the current spatial coverage of monitoring stations in eastern China. Through an analysis of air pollution in all urban areas of 256 prefectural-level municipalities in eastern China, we found that the average PM2.5 concentration in UNS in 2015 and 2018 were 52.26 μg m−3 and 41.32 μg m−3, respectively, which were slightly lower than that in UWS (52.98 μg m−3 and 41.48 μg m−3). About 12.1% of the prefectural-level municipalities had higher exposure levels in certain UNS than those in UWS. With the faster growth of UNS population, the gap between exposure levels of UNS and UWS were narrowing. Hence, currently prevalent administration-based principle of site location selection might have higher risk of missing the non-capital urban areas with relatively higher PM2.5 exposure level in the future.
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