![]() ![]() If attached to particles suspended in the air they can significantly increase the amount of light scattered by the particles ( measuring visibility). As water molecules are small and highly polar, they can bind strongly to many substances. Like temperature and solar radiation, water vapour plays an important role in many thermal and photochemical reactions in the atmosphere. A sensor measures this change and converts it into a temperature reading. The most common way of measuring temperature is to use a material with a resistance that changes with temperature, such as platinum wire. Temperature and sunlight (solar radiation) play an important role in the chemical reactions that occur in the atmosphere to form photochemical smog from other pollutants.įavourable conditions can lead to increased concentrations of smog. Measuring temperature supports air quality assessment, air quality modelling and forecasting activities. By measuring sound wave speeds in 2 different directions at the same time, sonic anemometers can measure both wind speed and direction. Sound travelling with the wind will take less time than sound travelling into the wind. At our monitoring stations, the type of anemometer we use is a sonic anemometer.Ī sonic anemometer operates on the principle that the speed of wind affects the time it takes for sound to travel from one point to another. Identifying the sources means planning to reduce the impacts on air quality can take place.Īn instrument called an anemometer measures wind speed. When high pollutant concentrations occur at a monitoring station, wind data records can determine the general direction and area of the emissions. When studying air quality, it is important to measure the following factors as they can help us understand the chemical reactions that occur in the atmosphere: simulate and predict air quality using computer models.predict air pollution events such as inversions and high-pollutant concentration days.On the other hand, when strong, turbulent winds blow, pollutants disperse quickly, resulting in lower pollutant concentrations. If the air is calm and pollutants cannot disperse, then the concentration of these pollutants will build up. So any study of air pollution should include a study of the local weather patterns (meteorology). Air movements influence the fate of air pollutants. ![]()
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