On Friday evening (2022-12-16), particulate matter concentrations went up sharply from 17:00 in the evening (in Amstelveen). Interestingly, the VOC and CO2 concentrations also rose at the same time. After a short odour test outside, it was clear that several wood stoves had been lit in the neighbourhood. It smelled very strongly of badly burnt (wet) wood. During the night, the smell decreased considerably.
In the graph, the concentrations are plotted over the measurement time.