Document Detail

Sulphur dioxide in Greater London, 1931-1985.
MedLine Citation:
PMID:  15092804     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Annual mean sulphur dioxide concentrations measured at County Hall in central London between 1931 and 1985 showed no clear trend until 1963/64, when a steady decline set in. Results for a number of sites across London for the period 1964/65 to 1984/85 have been divided into three geographic zones: the City of London, a central zone and an outer zone. A steady downward trend is evident in each zone, but is most pronounced in the City of London, especially after 1970. This could reflect the successful introduction of a 1% limit on the sulphur content of oil used within the City, but not elsewhere in London. Annual mean sulphur dioxide concentrations are now around 40 microg m(-3) in all three zones. Highest daily sulphur dioxide levels in both summer and winter have also declined steadily during the period 1964/65 to 1984/85, while at the same time the seasonal pattern of higher winter peaks in daily maxima, which was strong at the beginning of the period, has been virtually eliminated.
D P Laxen; M A Thompson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  43     ISSN:  0269-7491     ISO Abbreviation:  Environ. Pollut.     Publication Date:  1987  
Date Detail:
Created Date:  2004-04-19     Completed Date:  2004-06-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  103-14     Citation Subset:  -    
Air Pollution Group, London Scientific Services (formerly Greater London Council, Scientific Services Branch), County Hall, London SE1 7PB, Great Britain.
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