Understanding high tropospheric ozone episodes in Bangu, Rio de Janeiro, Brazil

The impact of COVID-19 partial lockdown on the air quality of the city of Rio de Janeiro, Brazil

“…Then, the period from March 23 to April 16 was highlighted in a darker color. The spread of the data is typical of these locations as have been shown in previous studies (Tsuruta et al, 2017;Dantas et al, 2019;Geraldino et al, 2020).…”

“…In April, as previously discussed, the levels of all pollutants had a small variation due to the relaxation of social isolation measures. In Bangu, NMHC remained with small variations and the increase of ozone levels may be attributed to the decrease in nitrogen oxides (Geraldino et al, 2020).…”

Increased ozone levels during the COVID-19 lockdown: Analysis for the city of Rio de Janeiro, Brazil

“…The monitoring station of Irajá is located approximately 100 m away from two main streets with high flux of light and heavy-duty vehicles, close to a taxi station, a supermarket with high flux of trucks, a cemetery and a square where several leisure, cultural and sports events take place (Mendes et al, 2020;Tsuruta et al, 2017). The monitoring station of Bangu is located in an area with moderate vehicular flow, surrounded by the Gericinó (altitude 970 m) and Pedra Branca (altitude 1020 m) mountains, which are natural barriers for air circulation, and frequently receives air masses from the west and east (Geraldino et al, 2020; Tsuruta et al, 2017).…”

Effect of COVID-19 pandemic on ambient air quality and excess risk of particulate matter in Turkey

“…Changes in median O 3 concentrations were lower during COVID-19 period at 1 of 3 stations in Bursa, while the difference was not significant at the remaining two stations. Studies on atmospheric O 3 concentrations revealed that the decrease in NO x concentrations may be attributed to the increase in O 3 concentrations ( Geraldino et al., 2020 , Dantas et al., 2019 ). Moreover, the decrease in PM concentrations, which results in increased sunlight reaching the Earth, may be attributed the production of O 3 with photochemical reactions ( Dang and Liao, 2019 ).…”