historic_co2: Atmospheric carbon dioxide concentration over 800,000 years
Description
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).
Usage
historic_co2
Arguments
Format
An object of class "data.frame".
Details
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`).