Table 3.
Differences (%) between each period of time and the reference period (from 02/16/2020 to 03/15/2020)
| Monitoring station | 03/16/20–03/22/20* | 03/23/20–04/03/20** | 04/04/20–04/16/20*** |
|---|---|---|---|
| PM10 (24-h mean) (industrial and natural emissions; buses and trucks: diesel) | |||
| Copacabana (RJ) | − 1.6% | − 14.8% | + 5.27% |
| Tijuca (RJ) | + 25.6% | − 37.7% | + 13.7% |
| Irajá (RJ) | + 32.9% | − 19.2% | + 20.7% |
| Campo Grande (RJ) | + 23.4% | − 2.8% | − 1.9% |
| Cerqueira César (SP) | 0% | − 5.3% | − 10.5% |
| Parque Dom Pedro II (SP) | − 14.3% | − 4.8% | + 4.8% |
| Itaim Paulista (SP) | + 2.6% | + 5.1% | + 10.3% |
| Grajau (SP) | − 20.8% | − 10.4% | − 14.6% |
| NO2 (maximum value, 1-h mean) (industrial emissions; buses and trucks: diesel) | |||
| Irajá (RJ) | + 27.4% | − 27.4% | − 9.1% |
| Bangu (RJ) | + 10.4% | − 27.3% | − 28.9% |
| Cerqueira César (SP) | + 34.2% | − 20.3% | − 41.8% |
| Parque Dom Pedro II (SP) | + 47.4% | − 14.5% | − 34.2% |
| Pinheiros (SP) | − 7.3% | − 32.9% | − 34.1% |
| Itaim Paulista (SP) | + 20% | − 20% | − 26% |
| CO (maximum value, 8-h mean) (light-duty vehicles and motorcycles: gasoline, ethanol) | |||
| Copacabana (RJ) | 0% | − 100% | − 100% |
| Tijuca (RJ) | − 20% | − 60% | − 40% |
| Bangu (RJ) | 0% | − 30% | − 40% |
| Campo Grande (RJ) | 0% | − 33.3% | − 33.3% |
| Cerqueira César (SP) | 0% | − 40% | − 50% |
| Parque Dom Pedro II (SP) | + 33.3% | − 33.3% | − 50% |
| Pinheiros (SP) | + 40% | − 40% | − 50% |
| Grajau (SP) | + 40% | − 30% | − 30% |
Differences were calculated using median values
*Schools and universities were closed; gatherings were prohibited; **partial lockdown; ***partial lockdown was relaxed