Interdisciplinary Department of Medicine, University of Bari, Bari, Italy.
Unit of Occupational Medicine, University Hospital of Bari, Bari, Italy.
Front Public Health. 2021 Apr 13;9:637540. doi: 10.3389/fpubh.2021.637540. eCollection 2021.
Lockdown measures were initiated in Italy on March 9th after the start of the SARS-CoV-2 epidemic to flatten the epidemic curve. The aim of the present study was to assess the impact of restrictive measures in the Apulia Region, southern Italy, on air quality from March to April 2020. We applied a dual-track approach. We assessed citizen mobility and vehicle traffic with mobility network data and information obtained from satellite tracking, and we evaluated and compared pollutant concentration data as measured by monitoring stations maintained by the Regional Agency for Environmental Protection and Prevention of Apulia (ARPA). The results showed a decrease in the weekly mean NO concentration recorded by urban traffic stations during the lockdown period. In particular, in the city of Bari, the average NO concentration decreased from 62.2 μg/m in March 2019 to 48.2 μg/m in March 2020. Regarding PM10 levels, the average concentrations at the individual traffic stations showed no particular variation compared to those in the same months of the previous year, except for Bari-Caldarola Station in March 2019/2020 (-value < 0.001) and in April 2019/2020 (-value = 0.04). In particular the average in March 2019 was ~26.9 μg/m, while that in March 2020 was ~22.9 μg/m. For April, the average concentration of PM10 in 2019 was 27.9 μg/m, while in 2020, the average was ~22.4 μg/m. This can be explained by the fact that PM10 levels are influenced by multiple variables such as weather and climate conditions and desert dust advections.
意大利于 2020 年 3 月 9 日在 SARS-CoV-2 疫情开始后启动了封锁措施，以平缓疫情曲线。本研究旨在评估意大利南部普利亚地区的限制措施对 2020 年 3 月至 4 月空气质量的影响。我们采用了双轨方法。我们利用移动网络数据和卫星跟踪获得的信息评估了公民流动性和车辆交通情况，并评估和比较了由普利亚地区环境和预防机构（ARPA）维护的监测站测量的污染物浓度数据。结果显示，在封锁期间，城市交通站记录的每周平均 NO 浓度下降。特别是在巴里市，NO 浓度从 2019 年 3 月的 62.2μg/m 降低到 2020 年 3 月的 48.2μg/m。至于 PM10 水平，个别交通站的平均浓度与前一年同月相比没有特别变化，除了 2019 年 3 月/2020 年 3 月巴里-卡尔达罗拉站（-值<0.001）和 2019 年 4 月/2020 年 4 月（-值=0.04）。特别是 2019 年 3 月的平均值约为 26.9μg/m，而 2020 年 3 月的平均值约为 22.9μg/m。对于 4 月，2019 年 PM10 的平均浓度为 27.9μg/m，而 2020 年的平均浓度约为 22.4μg/m。这可以解释为 PM10 水平受到多种变量的影响，如天气和气候条件以及沙尘输送。
