Title: Surface ozone measurements and meteorological influences in the urban atmosphere of Istanbul

Authors: Sema Topcu, Selahattin Incecik

Addresses: Department of Meteorology, Istanbul Technical University, Maslak, 80626 Istanbul, Turkey

Abstract: Hourly measurements of ozone concentration in the urban atmosphere of Istanbul were carried out from February 1998 to July 1999. An assessment of the annual variations and relationships of ozone concentrations and meteorological variables was made. Annual variations were first examined without considering meteorological variables, and meteorological influences on ozone seasonal values were then examined. Furthermore, a typical ozone threshold period was analysed by considering meteorological variables for a case study. Meteorological conditions favourable for high ozone concentrations appeared when Istanbul and its surrounding region were dominated by an anticyclonic pressure system. During conducive ozone days, southerly and southwesterly winds with low speeds (daytime mean value <11m1sSUP align=right>-1) influence Istanbul.

Keywords: Istanbul; meteorology; ozone precursors; surface ozone.

DOI: 10.1504/IJEP.2002.000680

International Journal of Environment and Pollution, 2002 Vol.17 No.4, pp.390-404

Available online: 13 Dec 2003 *

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