Figure 5From: Using self-organizing maps to develop ambient air quality classifications: a time series example Bi-annual frequencies, seasonal frequencies, and meteorological summaries for each SOM multipollutant day type. Panels (a-d) map bi-annual frequency counts for each multipollutant day type to the SOM grid. Panels (e-h) map seasonal frequencies of day types to the SOM grid. Panels (i-l) map the average (standard deviations) local weather conditions observed under each day type to the SOM grid. (Lighter grey tones indicate lower values and darker shades indicate higher values).Back to article page