Even better air quality in the ash zone, except at Vik on 2010-06-29

Very low levels of PM₁₀ at Heimaland and Hvolsvöllur on 29 June 2010. Still a little high at Vik (70 micro-g/m³; health limit 50 micro-g/m³).

Much better air quality in the ash fallout zone on 2010-06-28

The 24-hour average was just over the health limit at Vík, but just below at Hvolsvöllur and Heimaland.

There is a peak in the concentration at Vík just after midnight, and then lower levels. Small peak around 4 at Hvolsvöllur.

Advise for wildfires and PM10 pollution

Couple of web-pages, unfortunately only in Icelandic so far, about the health risks associated with different levels of PM10 pollution, and how to not start wildfires by accidents :-)

Wildfires advice (in Icelandic) here.

PM10 advice (in Icelandic) here.

PM10 in the ash zone, east Iceland on 2010-06-27

Still quite a bit of particulate matter, especially at Heimaland (246 micro-g/m3) and Hvolsvöllur (152 micro-g/m3), but also at Vík (100 micro-g/m3).

More about PM10 on 2010-06-26

Looking at the weather data from 26 June 2010, we can see that at Vík (red circles) the wind direction did not change much through the day, and, perhaps counterintuitive, the highest level of PM10 seems to be when the wind speed is lowest.

At Heimaland (blue stars) the highest levels are also obtained at relatively low wind speeds, and difficult to see any pattern for wind direction.