Index of ftp://aftp.cmdl.noaa.gov/data/trace_gases/co2/in-situ

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[DIR] aircraft  8.00Kb  January 6 2023
[DIR] surface  8.00Kb  August 8 2023 at 21:39
[DIR] tower  8.00Kb  December 20 2022
[DIR] tower_pre2004  152.00b  March 22 2019