Development of the TOA-Related Models for PM_2.5 Prediction Pre- and Post-COVID-19 Outbreak over Yangtze River Delta Region of China

Table 2

The performance of two RF models in different seasons.

Year	Seasons	TOA-all RF		TOA-sig RF
		R^2	RMSE (μg/m^3)		RMSE (μg/m^3)
2019	Winter	0.82	13.16	0.84	12.14
	Spring	0.78	10.64	0.79	10.42
	Summer	0.75	8.25	0.79	7.89
	Autumn	0.80	8.99	0.81	8.23
2020	Winter	0.83	10.96	0.84	10.10
	Spring	0.77	9.80	0.78	9.54
	Summer	0.75	8.23	0.77	8.00