A simultaneous interpretation by wind speed and direction, of ambient air CO in Athens, Greece.

The rectangular frequency isopleth diagram, a data presentation technique, has been applied to examine the effect of wind speed and direction, acting simultaneously, on the CO concentrations. The CO concentrations decrease, in the majority of directions and wind speed intervals, as the wind speed increases. The absolute maximum of CO concentrations occur when the wind blows from highly urbanized and industrialized area. The influence of the CO on human health is also discussed.