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Year
Month
13
Annual Average
9
Atmospheric Carbon Dioxide
8
Flask Sampling
8
CH4
6
TRENDS-OTHER ATMOSPHERIC TRACE GASES
6
atmospheric
6
flask air samples
6
gas chromatography
6
gas detector
6
mercuric oxide reduction
6
methane
6
Alert, NWT, Canada
4
Annual
4
Annual-Fitted
4
Apr
4
Atmospheric CO2
4
Atmospheric CO2 Concentration
4
Aug
4
Baring Head
4
Barrow, Alaska
4
CSIRO
4
Cape Kumukahi
4
Cape Matatula, Samoa
4
Carbon Dioxide
4
Christmas Island
4
Dec
4
Feb
4
Flame Ionization Detection
4
see all ...