Fig. 3: Correlation heatmap of air quality and meteorological variables. | npj Climate and Atmospheric Science

Fig. 3: Correlation heatmap of air quality and meteorological variables.

From: Development of a respiratory virus risk model with environmental data based on interpretable machine learning methods

Fig. 3

The closer a color is to red end of the spectrum, the stronger the positive correlation it indicates. Similarly, the closer it is to blue end of the spectrum, the stronger the negative correlation it indicates. AQI: Air Quality Index; CO: Carbon Monoxide; NO2: Nitrogen Dioxide; PM10: Particulate Matter with a diameter of 10 micrometers or less; PM2.5: Fine Particulate Matter with a diameter of 2.5 micrometers or less; SO2: Sulfur Dioxide.

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