The Evolution of Temporal and Spatial Patterns of Carbon Monoxide Concentrations in the Metropolitan Area of Sao Paulo, Brazil

Figure 4

(a) Hourly and (b) monthly averages of CO concentration for the MRSP for the years 1997 (blue) and 2012 (black). 10 stations were considered for 1997 and 14 stations for 2012. Error bars represent the standard deviation.

(a)

(b)