Today is a very nice day here in Reykjavik. Weather is sunny, temperature just below freezing and very calm winds.
Windspeed in Reykjavik (data from the IMO). Since about 6 am the windspeed has very calm, under 2 m/s and no gusts.
This unfortunatly also means that the concentration of particulate matter is quite high; at the measurement station at Grensásvegur – at an intersection of two busy streets. The high levels are due to traffic. This is clearly seen by looking at NOx (orange line), which is emitted by cars, and PM10 (blue line).
It will be intersting how large the top will be in the afternoon. The only thing that can prevent high concentration is stronger wind or precipitation.
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