Speaker
Description
One of the most serious effects of globalisation and human activity on the environment is air pollution. Nitrogen dioxide is particularly harmful to human health. Monitoring its content in the air over a long period of time allows trends to be assessed, and appropriate measures to be taken to improve air quality. In Poland, the Chief Inspectorate for Environmental Protection and its regional branches are responsible for monitoring air pollution levels. Measurements are taken continuously, and the results are recorded as hourly averages. Unfortunately, the data collected is sometimes incomplete. The most common reasons for missing data are power outages, analyser damage, data transmission disruptions, maintenance, and calibration procedures. However, in many cases, missing data can be approximated.
The MICE algorithm was used to impute the missing data. In majority of cases analysed, the algorithm provides a good approximation of the actual nitrogen dioxide values. However, in some situations, the real values were underestimated.
85717621069