Factors influencing the variability of so2 concentrations in istanbul

Yurdanur Sezginer Unal, Selahattin Incecik, Yunus Borhan, Sibel Mentes

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The correlation between sulfur dioxide (SO2) concentrations measured at the European and Asian sides of Istanbul and meteorological parameters is investigated using principal component analysis (PCA) and multiple regression analysis techniques. Several meteorological parameters are selected to represent the atmospheric conditions during two winter periods: 1993–1994 and 1994–1995. Six principal components are found to explain the majority of the observed meteorological variability. Surface pressure, 850-mb temperature, and surface zonal(east-west) and meridional (north-south) winds show high loadings on separate factors identified by PCA. We seek dominant meteorological parameters that control the SO2 levels at each monitoring station. Several multiple regression analysis models are fitted to the data from each monitoring station using sixprincipal components and previous day SO2 concentrations as independent variables.Results suggest that the most important parameters, highly correlated with SO2 concentrations in the Istanbul metropolitan area, are atmospheric pressure and surface zonal and meridional winds. These components have more influence on the determination of the air pollution levels at the Asian side than at the European side.

Original languageEnglish
Pages (from-to)75-84
Number of pages10
JournalJournal of the Air and Waste Management Association
Volume50
Issue number1
DOIs
Publication statusPublished - Jan 2000

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