Increased air pollution exposure among the Chinese population during the national quarantine in 2020
Increased air pollution exposure among the Chinese population during the national quarantine in 2020
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DOI：
10.1038/s41562-020-01018-z
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发表时间：
2021-01-04
影响因子：
29.9
通讯作者：
Smith, Kirk R.
中科院分区：
文献类型：
--
作者：
Shen, Huizhong;Shen, Guofeng;Smith, Kirk R.
中国的COVID-19隔离被认为减少了环境空气污染。然而，人口的总体暴露程度还取决于室内空气质量和人的流动性和活动。在这里，通过整合实时移动数据和大流行期间时间-活动模式的问卷调查，我们发现，尽管隔离期间环境PM2.5有所下降，但考虑室内和室外环境的总人口加权PM2.5暴露量增加了5.7 μ g m3（95%置信区间，1.2-11.0 μ g m3）。人口加权暴露量的增加主要是由于春节前全国范围内的城市人口向农村迁移，加上隔离导致的向后迁移冻结，这增加了家庭能源消耗和农村家庭室内空气污染暴露的人群比例。我们的分析揭示了在隔离期间空气污染暴露的不平等性增加，并强调了家庭空气污染对中国人口健康的重要性。Shen等人将人类流动和活动数据与地面测量和空气质量模型相结合，发现尽管中国在COVID-19隔离期间室外PM2.5减少，但总体人口暴露于PM2.5的程度增加。
The COVID-19 quarantine in China is thought to have reduced ambient air pollution. The overall exposure of the population also depends, however, on indoor air quality and human mobility and activities. Here, by integrating real-time mobility data and a questionnaire survey on time-activity patterns during the pandemic, we show that despite a decrease in ambient PM2.5 during the quarantine, the total population-weighted exposure to PM2.5 considering both indoor and outdoor environments increased by 5.7 mu g m(-3) (95% confidence interval, 1.2-11.0 mu g m(-3)). The increase in population-weighted exposure was mainly driven by a nationwide urban-to-rural population migration before the Spring Festival coupled with the freezing of the migration backward due to the quarantine, which increased household energy consumption and the fraction of people exposed to rural household air pollution indoors. Our analysis reveals an increased inequality of air pollution exposure during the quarantine and highlights the importance of household air pollution for population health in China.Integrating human mobility and activity data with ground-level measurements and air quality models, Shen et al. find that despite a reduction in outdoor PM2.5 during the COVID-19 quarantine in China, overall population exposure to PM2.5 increased.