• Analysed station:
AB-1 (latitude: 46.06, longitude: 23.56, altitude: 242.00)

  • Nitrogen Dioxide (NO2) Analysis:

We notice saw-tooth variations for both the 2019 and 2020 emissions throughout the analysed period. However, at the middle of the year we can see a maintained one-month decrease in 2020. Also, during the state of emergency from March 16 to May 14, there was a general decreasing trend, although there were also some extreme values. 

  • Carbon Monoxide (CO) Analysis:

 At the start of the year the emissions vary, but since the lockdown in March we can see a massive decrease in the 2020 emissions that lasted until October when more restrictions were lifted, the values being very low in this period. From October to December, we start seeing variations again, but still the 2019 emissions were generally higher than the ones in 2020.

  • Sulfur Dioxide (SO2) Analysis:

Here it appears that even though the quarantine affected the NO2 and CO emissions it didn’t really affect the SO2 emissions, at least not in Alba County, where the quantities of SO2 were very close in 2019 and 2020 throughout the whole 12-month period. 

  • Conclusion:

In conclusion, we can say that the lockdown caused a decrease of the NO2 and CO emissions but it didn’t really affect the SO2 emissions, which, even though mostly a bit lower than in 2019, remained at close values in 2020.