4 ms·
Because there's noise inherent to any physical measurement. On the monthly chart, the range on the y-axis is 0.7 ppm. There's absolutely no sensor in the world
by semi-extrinsic 9y ago
Because there's noise inherent to any physical measurement. On the monthly chart, the range on the y-axis is 0.7 ppm. There's absolutely no sensor in the world capable of giving a reliable and valid measurement of CO2 in the atmosphere with sub-ppm accuracy. Just consider e.g. changing wind speed and directions which influence both the degree of atmospheric mixing and what the mix is of CO2 sources/sinks in the upstream direction.
Really, the smallest range on the y-axis should be 10 ppm, no matter how small the time interval. No need to spark general curiosity about noise.
- safiume 9y agoIndeed. For a Bay Area comparison showing local fluctuation to gauge CO2 saturation, see the Exploratorium's Beacon Data: https://www.exploratorium.edu/environmental-field-station/current-conditions https://www.exploratorium.edu/environmental-field-station/cu... https://www.exploratorium.edu/environmental-field-station/sensors-locations https://www.exploratorium.edu/environmental-field-station/se.... It varies quite heavily, some of the latest measurements are in the over 500PPM.
- titojankowski 9y agoWell said!
- safiume 9y agoThanks. Also, try adding a overlay line that shows the larger trend like the Keeling curve, to keep some of the variance.