Document Detail


Contribution of anthropogenic pollutants to the increase of tropospheric ozone levels in the Oporto Metropolitan Area, Portugal since the 19th century.
MedLine Citation:
PMID:  16171911     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The main purpose of this study was to evaluate the contribution of anthropogenic pollutants to the increase of tropospheric ozone levels in the Oporto Metropolitan Area (Portugal) since the 19th century. The study was based on pre-industrial and recent data series, the results being analyzed according to the atmospheric chemistry. The treatment of ozone and meteorological data was performed by classical statistics and by time-series analysis. It was concluded that in the 19th century the ozone present in the troposphere was not of photochemical origin, being possible to consider the respective concentrations as reference values. For recent data a cycle of 8h for ozone concentrations could be related to traffic. Compared to the 19th century, the current concentrations were 147% higher (252% higher in May) due to the increased photochemical production associated with the increased anthropogenic emissions.
Authors:
M C M Alvim-Ferraz; S I V Sousa; M C Pereira; F G Martins
Publication Detail:
Type:  Journal Article     Date:  2005-09-19
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  140     ISSN:  0269-7491     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2006 Apr 
Date Detail:
Created Date:  2006-02-28     Completed Date:  2006-10-31     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  516-24     Citation Subset:  IM    
Affiliation:
LEPAE, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Oporto, Portugal. aferraz@fe.up.pt
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MeSH Terms
Descriptor/Qualifier:
Air Pollutants / chemistry*
Air Pollution / analysis*
Atmosphere / chemistry*
Atmospheric Pressure
Environmental Monitoring / methods
Humidity
Oxidants, Photochemical / analysis
Ozone / analysis*
Portugal
Rain
Seasons
Time Factors
Chemical
Reg. No./Substance:
0/Air Pollutants; 0/Oxidants, Photochemical; 10028-15-6/Ozone

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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