Which set of meteorological parameters is typically collected with ambient monitors?

• A. Temperature, relative humidity, wind speed, wind direction, solar radiation, atmospheric pressure, and precipitation when available.
• B. Temperature, wind speed, and ozone.
• C. Humidity and PM2.5 only.
• D. Temperature, relative humidity, wind speed, and CO.

Answer: (A)

Ambient air monitoring relies on collecting a broad set of meteorological data to interpret pollutant concentrations and support dispersion analyses. The standard meteorological parameters gathered with ambient monitors include temperature, relative humidity, wind speed, wind direction, solar radiation, atmospheric pressure, and precipitation when available. This combination matters because temperature and humidity influence chemical reactions and moisture, wind speed and direction determine how pollutants disperse, solar radiation drives photochemical processes, and precipitation affects pollutant removal and visibility of data. The other options miss several of these key measurements or mix in pollutants, which aren’t meteorological data. Therefore, this set best reflects what ambient monitors typically collect for weather-to-air quality interpretation.