Thus, these five sampling dates were defined as “haze days”. On December 30 and 31, and January 11 and 12, PM10 concentrations were relatively lower (143, 131, 144, and 135g/m3) with simultaneous higher wind speed and higher atmospheric visibility.
Thus, these five sampling dateswere defined as “haze days”. On December 30 and 31, and January11 and 12, PM10 concentrations were relatively lower (143, 131,144, and 135g/m3) with simultaneous higher wind speed andhigher atmospheric visibility.