London set to embrace a 'perfect storm' of smog pollution

London could experience a 'perfect storm' of smog pollution if high temperatures and easterly winds persist, it has been reported.

Experts have warned that summer smog could adversely affect athletes’ performance at the Games, with inflamed airways and breathing problems likely to be caused if pollution levels hit certain heights.

Current weather systems point to some high temperatures and easterly winds which will be with us at least until the opening ceremony. This could create a 'perfect storm' of smog pollution that could affect the performance of athletes at the start of the Olympics.

Gary Fuller, an air quality expert at King's College London, told the Guardian: "Athletes are thought to be especially vulnerable to the effects of ground level ozone and other air pollutants because they are breathing in very high volumes of air.

"It's something that might affect their performance on the day."

Endurance athletes are likely to be the worst affected, with those competing in the marathon, triathlon and long distance cycling events at risk.

Smog, or ground level ozone, is the main pollutant of concern, and is formed when sunlight triggers reactions between oxygen in the air and emissions such as nitrogen dioxide released by vehicles and industrial processes.

There has been a great deal of these conditions occurring in southern England of late, which makes it more likely it will form in greater concentrations over London.

The Department for Environment Food and Rural Affairs (Defra) will issue a smog alert if air pollution levels reach seven on their scale. People are advised that pollution at this concentration could cause sore eyes, coughing or a sore throat. They also advise people to consider reducing physical activity, especially outdoors.

Speaking to the Guardian, Simon Birkett, of the campaign group Clean Air in London, said: "Regrettably, we have a perfect storm for smog this week with strong sunshine, very low wind speeds, easterly winds and the prospect of severe traffic congestion as the Olympic lanes begin operating from Wednesday."

Posted by Claire Manning