Ic. Ziomas et al., A NOTE ON SMOKE CONCENTRATIONS IN URBAN ATHENS, USING DATA MEASURED BY 2 DIFFERENT METHODS, Meteorology and atmospheric physics, 55(3-4), 1995, pp. 215-221
The relationships between smoke concentrations, measured at two monito
ring stations in Athens by the ASTM (American Society for Testing and
Materials) and the OECD (Organization for Economic Co-Operation and De
velopment) methods are studied by using a sample of 738 mean daily val
ues of simultaneous measurements during the period 1984-1986. It is sh
own that an exponential model, different for each monitoring station,
with smoke concentrations in COH (coefficient of haze) as the independ
ent variable and smoke concentrations in mugr/m3 as the dependent vari
able, was the most appropriate for transforming smoke data from COH to
mugr/m3. Also it is shown that the transformation models can be appli
ed independent of the prevailing meteorological conditions. Finally so
me tentative conclusions are derived concerning the long term variatio
ns of smoke concentrations in mugr/m3 for the period 1977-1990 and 197
3-1990 at the two monitoring stations respectively. The trend analysis
has shown that pollution abatement efforts resulted in an about 10% p
er year decreasing trend in smoke concentrations, during the period 19
86-1990, at these two Athenian stations.