5 ms·
Wondering what the massive, yet brief, spikes in Guangzhou are...the ceiling of the Hazardous category of the AQI is capped at 500. That would mean that reading
by taylorwc 14y ago
Wondering what the massive, yet brief, spikes in Guangzhou are...the ceiling of the Hazardous category of the AQI is capped at 500. That would mean that readings like the 1/12/13 of 827 are quite literally 'off-the-chart.'
- roc 14y agoThe safe bet would be some atmospheric event that concentrated existing pollution. Any new pollution generation event would be expected to have more impact on the baseline, right?
- icegreentea 14y agoPossibly. They appear to be events that truly saturate the sensor, as all of the spikes have the exact same concentration and air quality index readings (995 and 827 respectively).
- taylorwc 14y agoDid a bit more poking around. Could be a temperature inversion causing a spike (http://www.wrh.noaa.gov/slc/climate/TemperatureInversions.php http://www.wrh.noaa.gov/slc/climate/TemperatureInversions.ph...). Would be heavily dependent on the location of the sensor and surrounding topography, which all fits. If I find time, I might overlay weather data and see what it looks like.