Redirigiendo al acceso original de articulo en 20 segundos...
Inicio  /  Climate  /  Vol: 10 Par: 3 (2022)  /  Artículo
ARTÍCULO
TITULO

Changing Air Quality and the Ozone Weekend Effect during the COVID-19 Pandemic in Toronto, Ontario, Canada

William A. Gough and Vidya Anderson    

Resumen

Air pollutants, NO, NO2, and O3, were examined from April to June 2020 and compared to a 10-year (2010?2019) climatology of these pollutants for two monitoring sites in Toronto, Ontario, Canada, coinciding with local lockdown measures during the first wave of the COVID-19 pandemic. NO and NO2 values were lower than any of the preceding 10 years at the two Toronto sites for both weekdays and weekends. Ozone concentrations did not have a corresponding decrease and in fact increased for weekdays, similar to other parts of the world. The well-documented ozone weekend effect was considerably muted during the morning rush hour throughout this pandemic period. A Fisher exact test on hourly averaged data revealed statistically significant record hourly minimums for NO and NO2, but this was not found for ozone, consistent with the aggregate ranking results. These findings are likely the result of considerably reduced vehicular traffic during this time and ozone chemistry in a NOx-saturated (VOC limited) environment. This has important implications for ozone abatement strategies.

 Artículos similares

       
 
David Newth and Don Gunasekera    
The increased levels of Greenhouse Gasses (GHGs) in the atmosphere will result in increased near-surface air temperature and absolute humidity. These two factors increasingly pose a risk of heat stress to humans. The Wet-Bulb Globe Temperature (WBGT) is ... ver más
Revista: Atmosphere

 
Janarjan Bhandari, Swarup China, Timothy Onasch, Lindsay Wolff, Andrew Lambe, Paul Davidovits, Eben Cross, Adam Ahern, Jason Olfert, Manvendra Dubey and Claudio Mazzoleni    
The optical properties (absorption and scattering) of soot particles depend on soot size and index of refraction, but also on the soot complex morphology and the internal mixing with materials that can condense on a freshly emitted (nascent) soot particl... ver más
Revista: Atmosphere

 
Reija Ruuhela, Kirsti Jylhä, Timo Lanki, Pekka Tiittanen and Andreas Matzarakis    
Climate change is expected to increase heat-related and decrease cold-related mortality. The extent of acclimatization of the population to gradually-changing thermal conditions is not well understood. We aimed to define the relationship between mortalit... ver más

 
Baolei Lyu, Yuzhong Zhang and Yongtao Hu    
Chinese cities are experiencing severe air pollution in particular, with extremely high PM2.5 levels observed in cold seasons. Accurate forecasting of occurrence of such air pollution events in advance can help the community to take action to abate emiss... ver más
Revista: Atmosphere

 
Antonio Ricchi, Mario Marcello Miglietta, Francesco Barbariol, Alvise Benetazzo, Andrea Bergamasco, Davide Bonaldo, Claudio Cassardo, Francesco Marcello Falcieri, Giancarlo Modugno, Aniello Russo, Mauro Sclavo and Sandro Carniel    
In November 2011, an Atlantic depression affected the Mediterranean basin, eventually evolving into a Tropical-Like Cyclone (TLC or Mediterranean Hurricane, usually designated as Medicane). In the region affected by the Medicane, mean sea level pressures... ver más
Revista: Atmosphere