Been looking at my Davis AirLink data for a week or so. We've been having some morning with quite a lot of fog. It seems that when the fog lifts, PM level drop.
I've been searching a bit on the relation between fog and air quality, but can't make too much sense of it yet.
Bottom line, I am wondering if the fog is causing the AirLink to show increased PM values, or of the fog correlates with actual decreased air quality. There doesn't seem to be a clear relation between humidity levels and PM values showing by the AirLink, so I'm assuming that it's not just the sensor being affected by humidity.
I'm assuming that the fog isn't actually caused by bad air quality.