historic_co2 | R Documentation |
Concentration of carbon dioxide in ppm by volume from direct measurements at Mauna Loa (1959-2018 CE) and indirect measurements from a series of Antarctic ice cores (approx. -800,000-2001 CE).
historic_co2
An object of class "data.frame"
.
year. Year (CE).
co2. Carbon dioxide concentration in ppm by volume.
source. Source of carbon dioxide measurement: direct CO2 annual mean concentrations from Mauna Loa ('Mauna Loa') or indirect CO2 concentrations from air trapped in ice cores ('Ice Cores').
Mauna Loa data from NOAA. Ice core data from Bereiter et al. 2015 via NOAA.
head(historic_co2)
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