Interpreting the visualisations
Some animations show day-averaged (as calendar-day averages) PM2.5 and wind data, others show hour-averaged data. PM2.5 values are represented by the colour and size of circular symbols plotted at the station locations. The key at lower right indicates the PM2.5 levels. Wind direction and speed are represented by the green arrows. The direction the arrow is pointing represents the direction the wind is blowing. The length of the arrow represents the wind speed.
The date and time are shown along the top of the map. For hour-averaged data, the 'hour hand' also rotates on a clock near the top of the map.
On the right of the map, there is a list of stations (identified by a two-letter abbreviation) and a running total of the number of PM2.5 measurements over a specified limit (usually 25 microgram/cubic metre) since the start of the interval of the animation. For day-averaged data, values above 25 micrograms/cubic metre represent levels above the 24-hour national air quality standard for PM2.5. For hour-averaged data, values above 25 micrograms/cubic metre are above the Tasmanian Department of Health 'air advisory' level for sensitive people.
You can refer to our current 'real-time' air quality map to help in identifying the air stations. Note that three stations, established early on, are no longer operational. These are Carrick ('CA', decommissioned in early 2013 after Hadspen station was installed); Bryn Estyn ('BE', decommissioned in February 2013 after New Norfolk station was installed); and Clearys Gates ('CG', decommissioned in early 2013) which was originally established in support of a road-side air-toxics monitoring site. The CG station was reconfigured as a solar-powered unit and was deployed at Mornington in July 2013. Note also that Scottsdale station ('SC') established in May 2009, at a site approximately 2 km from the town, was moved into the town in February 2016.