• Analysed station:
CL-1 (latitude: 44.20, longitude: 27.31, altitude: 18.00)

  • Nitrogen Dioxide (NO2) Analysis:

Prior to the quarantine, the quantities of NO2 in 2020 are very similar to those in 2019. A visible reduction in NO2 emissions was reported at the CL-1 station following the state of emergency beginning in March. The quantities of NO2 started to rise at the end of quarantine, the values being then similar to those in 2019. 

  • Carbon Monoxide (CO) Analysis:

The amount of CO in the air did not change, although the whole country went into forced quarantine in mid-March. However, we can see a big difference between the first and the second part of the year, so CO emissions have dropped exponentially since June, being also lower than the ones recorded in 2019. One thing that we could see from the graph is that there was a contrast between the two parts of the year, both in 2019 and 2020.

  • Sulfur Dioxide (SO2) Analysis:

The amount of SO2 was comparable to the previous year before the state of emergency was established in Spring. Yet SO2 emissions in 2020 stayed at the same level when the quarantine started, whereas those from the previous year were lower. Emissions from the two years hit the same amount in October.

  • Conclusion:

Ground measurements therefore showed that the COVID-19 pandemic, blockage and other constraints placed in Calarasi County induced a strong decrease in air pollution, with substantially lower values of NO2 emissions during the state of emergency from March 16 to May 14 and also CO emissions in the second half of the year.