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

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').

Source

Mauna Loa data from NOAA. Ice core data from Bereiter et al. 2015 via NOAA.

Examples

head(historic_co2)