Table 2.

Pearson correlation coefficients between meteorological parameters and concentrations of PM_2.5 and PM₁₀ in the atmosphere of Arequipa, Peru, during 2019 and 2020

	September and October 2019 (pre-COVID-19 pandemic period)
	PM2.5			PM10
	n	Pearson R	p value	n	Pearson R	p value
T (mean)	45	0.13	0.4002	45	0.30	0.0430
T (max)	45	0.15	0.3245	45	0.39	0.0077
T (min)	45	0.08	0.5905	45	0.14	0.3727
WS (mean)	45	−0.46	0.0015	45	−0.32	0.0316
WS (max)	45	−0.04	0.8148	45	−0.06	0.6931
RH (mean)	45	0.11	0.4897	45	−0.20	0.1836
	From May to October 2020 (COVID-19 pandemic period)
	PM2.5			PM10
	n	Pearson R	p value	n	Pearson R	p value
T (mean)	125	0.06	0.5338	125	0.07	0.4137
T (max)	125	0.03	0.7707	125	0.04	0.6217
T (min)	125	0.05	0.6096	125	0.01	0.9109
WS (mean)	125	−0.09	0.3450	125	−0.03	0.7746
WS (max)	125	0.01	0.8945	125	0.07	0.4195
RH (mean)	125	−0.13	0.1633	125	−0.27	0.0020

T temperature, WS wind speed, RH relative humidity