Evaluation of air quality models for the simulation of a high ozone episode in the Houston metropolitan area

2007 ◽  
Vol 41 (4) ◽  
pp. 837-853 ◽  
Author(s):  
Daewon W. Byun ◽  
Soon-Tae Kim ◽  
Seung-Bum Kim
Keyword(s):  
Air Quality ◽  
Metropolitan Area ◽  
Quality Models ◽  
High Ozone Episode ◽  
Ozone Episode ◽  
Houston Metropolitan Area

Hydrologic data for urban studies in the Houston metropolitan area, Texas, 1984

1987 ◽  
Author(s):  
Fred Liscum ◽  
J.P. Bruchmiller ◽  
D.W. Brown ◽  
E.M. Paul
Keyword(s):  
Metropolitan Area ◽  
Urban Studies ◽  
Hydrologic Data ◽  
Houston Metropolitan Area

scholarly journals Characterization of Air-Quality Degradation Episodes of PM10 in the Metropolitan Area of São Paulo and Their Relationship with Meteorological Conditions

2020 ◽  
Vol 4 (1) ◽  
pp. 8
Author(s):  
Maria C. Q. D. Oliveira ◽  
Luciana V. Rizzo ◽  
Anita Drumond
Keyword(s):  
Air Quality ◽  
Metropolitan Area ◽  
Sao Paulo ◽  
Meteorological Conditions ◽  
Pollutant Emissions ◽  
Maximum Temperature ◽  
São Paulo ◽  
Urban Centers ◽  
Duration Distribution ◽  
Air Quality Monitoring Stations

Air pollution is one of the main environmental problems in large urban centers, affecting people’s health and impacting quality of life. The Metropolitan Area of São Paulo (MASP) presents frequent exceedances of air-quality standards in inhalable particulate matter (PM10), a consequence of pollutant emissions modulated by meteorological conditions. This study aims to identify and characterize PM10persistent exceedance events (PEE) inthe MASP between 2005 and 2017, relating them to meteorological conditions. The criteria used to select the events were: (i) events that occurred in at least 50% of the air-quality monitoring stations chosen for this study and, (ii) among the events that met the first criterion, those with a duration equal to or greater than five days, which correspond to the 80% percentile of the event duration distribution. A total 71 persistent episodes of exceedance were selected. The results show that the exceedance of PM10 lasted up to 14 consecutive days and was predominant in the austral winter, accompanied by an increase in maximum temperature (T), a decrease in wind speed (WS) and relative humidity (RH), and a wind direction predominantly from the northwest during the peak concentration of the pollutant. On average, a concentration increase of 60% was observed at the peak of the PEE.

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