Like predicted the PM10 pollution levels were high during New year’s eve. Reached 2185 mg m-3 at 01:30 at Grensásvegi (GRE; according the Reykjavik city website). At FHG and FAR the maximum pollution levels were around 1200 mg m-3.
According to the weather forecast, we should expect high levels of particulate matter pollution in Reykjavik - and most other towns - in Iceland this New year's eve.
In a manuscript (already submitted), I and co-authors, we show that the PM-pollution levels can reach 2374 μg m-3 just after midnight if the weather is calm, but if there is strong wind (and rain) the levels can be as low as <500 μg m-3.