NH3 NO NO2 Temperature
Delhi (n = 192)
NO -0.896*      
NO2 0.975* -0.932*    
Temperature 0.872* -0.772* 0.864*  
RH -0.843* 0.774* -0.834* -0.995*
Dibrugarh (n = 144)
NO 0.093      
NO2 0.054 0.478    
Temperature 0.422 -0.117 -0.591*  
RH -0.382 0.124 0.631* -0.995*
Thiruvananthapuram (n = 168)
NO 0.322      
NO2 -0.307 -0.006    
Temperature -0.254 0.277 0.578*  
RH 0.313 -0.213 -0.618* -0.996*
* Significant at 1% level.
Table 3: Correlation matrix of ambient trace gases and meteorological parameters.