Influence of Temperature, Relative Humidity and Seasonal Variability on Ambient Air Quality in a Coastal Urban Area

Table 1

Range of pollutant concentrations indicating season wise trend.

Pollutants	Continuous monitoring station	Pre-monsoon season		Monsoon		Post-monsoon season		Summer season
		Min μg/Nm^3	Max μg/Nm^3	Min μg/Nm^3	Max μg/Nm^3	Min μg/Nm^3	Max μg/Nm^3	Min μg/Nm^3	Max μg/Nm^3
SO2	Kathivakkam	—	—	—	—	—	36.3	—	27.6
	Manali	—		8.6	—	—	—	—	—
	Thiruvottiyur	8.1	17.4	—	15.7	8.1	—	8.5	—
NOx	Kathivakkam	—	—	—	—	11.9	—	—	—
	Manali	—	—	11.8	—	—	—	—	—
	Thiruvottiyur	12.5	30.8		23.1	—	33.1	11.7	50.3
RSPM	Kathivakkam	29	—	31	—	—	—	—	309
	Manali	—	—	—	—	—	225	—	—
	Thiruvottiyur	—	243	—	292	40		35
SPM	Kathivakkam	46	386	72	298	—	372	—	565
	Manali	46		—	—	—	372	—	—
	Thiruvottiyur	—	—	—	—	103		76	—