Task 1: Official Air Quality
Understanding Air Quality in Sofia
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Spatio-temporal Analysis of Official Air Quality
Contents
Comparison of Past and Present Air Quality Situation in Sofia
Characterize the past and most recent situation with respect to air quality measures in Sofia City. What does a typical day look like for Sofia city?
Changes from 2013 to 2018
Annual Average Concentration of PM10 frequently exceeds the EU allowable limit The European Union sets the limit of 40 μg/m3 as the maximum annual average for PM10. When plotting a horizon graph, we were able to discern the percentage difference of the annual average concentration level across various stations throughout 2013-2018. The shaded area above/below the x-axis reflects the percentage difference which the annual average concentration deviates from the EU annual limit (40 μg/m3). Most notably, the highest annual average concentration level was recorded in 2017 at BG0079A where average concentration level exceeded EU annual limits by 1755%.
Discovered Trends of Interest
Anomalies in dataset
Missing dataset for STA-BG0054A from 2016-2018
Data from STA-BG0054A (Orlov Most) is missing from 2016-2018. This could be possible decommissioning of the air quality station from 2016 onwards.
New Air Quality Station in 2018 – STA- BG0079A (Orlov Most)
Dataset for Orlov Most covers only the first 9 months of 2018.
Incorrect altitude level for STA-BG0079A (Mladost)
In the metadata table provided, we noticed that altitude for STA-BG0079A (Mladost) set as “0” is likely to be an error as Sofia city sits at 550m above sea level.
