The whole point is to collect time-series data at a location that's isolated from individual sources of CO2 emissions. That way we can see how CO2 concentrations are changing over long periods of time.

Your comment doesn't make any sense. If you shut down the measurement, you don't have any data going forward, so the data cannot be "everywhere". And you cannot substitute data collected in another location if you want to measure changes over time - which is a really important thing to measure.