I have just come across this air pollution alert that has been issued for the Highlands for today. Sulphur Dioxide is monitored at four sites across the Highlands but according to the table of readings it’s not measured by any of them, ozone is monitored at three sites but strangely not at Inverness. The warning seems to have been issued for high levels of ozone and triggered by readings at Lerwick. I can’t see how can the environment agency can base a regional warning on such scarce data as this? With a moderate southerly flow I can’t see how high ozone levels in the Shetlands could affect the mainland at all. I realise that you can’t judge air quality by visibility but nevertheless visibilities here were excellent today.
And here’s some more data on pollution across Europe that I’ve found. Notice the high ozone levels in a number of cities in Belgium and the Netherlands. I’m no expert, so all I can assume is the low level southerly flow is transporting it all the way up the North Sea, if that’s the case why hasn’t the sensor at Aberdeen picked high levels up as well? Or could it just be a dodgy sensor?