Table 3(a).

Regression of PM_2.5 on AOD, mean sea level pressure and relative humidity at 5 km pixel resolution – disaggregate analysis.

PM2.5 as a function of:	Interval across satellite crossing time (h: min)
	0:15	0:30	0:45	1:00	1:15	1:30	1:45	2:00	2:15	2:30	All
ln(AOD)	0.43 (2.77)**	0.449 (3.70)**	0.521 (5.05)**	0.491 (5.35)**	0.497 (5.62)**	0.451 (5.61)**	0.427 (5.41)**	0.419 (5.56)**	0.401 (5.33)**	0.398 (5.17)**	0.398 (5.18)**
Relative humidity (%)	0.024 (1.97)*	0.014 (−1.72)	0.012 (−1.87)	0.011 (−1.85)	0.018 (3.31)**	0.019 (4.51)**	0.019 (4.92)**	0.02 (5.48)**	0.021 (6.05)**	0.023 (6.59)**	0.024 (6.65)**
Mean sea level atmospheric pressure (hectopascal)	0.075 (3.37)**	0.072 (4.42)**	0.07 (5.09)**	0.063 (5.07)**	0.066 (5.71)**	0.067 (6.12)**	0.065 (6.13)**	0.067 (6.74)**	0.066 (6.68)**	0.07 (6.84)**	0.07 (6.85)**
Constant	−72.9 (3.21)**	−69.5(4.18)**	−66.8 (4.80)**	−59.6 (4.75)**	−63.7 (5.39)**	−64.1 (5.79)**	−62.4 (5.79)**	−64.4 (6.39)**	−63.8 (6.34)**	−67.2 (6.51)**	−67.2 (6.52)**
Observations	129	231	347	423	515	589	652	708	745	760	762
Number of AOD pixels	74	104	141	164	191	210	226	237	246	248	248
Pixel R2	0.76	0.76	0.71	0.74	0.73	0.72	0.72	0.74	0.75	0.70	0.70