Global Centre for Clean Air Research (GCARE), Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, United Kingdom.
J Acoust Soc Am. 2022 Feb;151(2):881. doi: 10.1121/10.0009323.
During the Covid-19 pandemic and resulting lockdowns, road traffic volumes reduced significantly leading to reduced pollutant concentrations and noise levels. Noise and the air pollution data during the lockdown period and loosening of restrictions through five phases in 2021 are examined for a school site in the United Kingdom. Hourly and daily average noise level as well as the average over each phase, correlations between noise and air pollutants, variations between pollutants, and underlying reasons explaining the temporal variations are explored. Some strong linear correlations were identified between a number of traffic-sourced air pollutants, especially between the differently sized particulates PM, PM, and PM (0.70 < r <0.98) in all phases and an expected inverse correlation between nitrogen dioxide (NO) and ground-level ozone (O) (-0.68 < r < -0.78) as NO is a precursor of O. Noise levels exhibit a weak correlation with the measured air pollutants and moderate correlation with meteorological factors, including wind direction, temperature, and relative humidity. There was a consistent and significant increase in noise levels (p < 0.01) of up to 3 dB with initial easing, and this was maintained through the remaining phases.
在新冠疫情大流行和随之而来的封锁期间，道路交通量显著减少，导致污染物浓度和噪声水平降低。研究了英国一个学校场地在封锁期间和 2021 年分五个阶段放宽限制期间的噪声和空气污染数据。探讨了每小时和每日平均噪声水平以及每个阶段的平均值、噪声与空气污染物之间的相关性、污染物之间的变化以及解释时间变化的基本原因。在所有阶段，都确定了一些交通源空气污染物之间的强线性相关性，尤其是不同大小的颗粒物 PM、PM 和 PM 之间的相关性（0.70<r<0.98），二氧化氮（NO）和地面臭氧（O）之间存在预期的负相关（-0.68<r<-0.78），因为 NO 是 O 的前体。噪声水平与测量的空气污染物呈弱相关，与气象因素呈中度相关，包括风向、温度和相对湿度。随着最初的放松，噪声水平持续上升（p<0.01），最高可达 3dB，并且在其余阶段保持不变。
