NOAA vs AGAGE

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Work out how NOAA data differs, or doesn't, from AGAGE. For example, why are there 3 timeseries in Figure 4 here, yet CSIRO's observations are part of both NOAA (https://gml.noaa.gov/dv/site/?program=ccgg) and AGAGE (https://agage.mit.edu/global-network). Is there overlap yet they are somehow different products or are these products truly independent?

Required to close

• answer about how these datasets do or don't differ

[znichollscr]

Paul Krummel will have good ideas here too. I think the networks are different and use different measurements, so we probably don't need to worry about double counting too much