Retrieve CO2 concentration (in ppm) for given calendar year.
Arguments
- year
Calender year for which to extract CO2 concentration.
Value
Approximate CO2 concentration in ppm for given year.
Details
This function defines the CO2 concentration as a function of calendar
year. it is based on a polynomial fit to the annual CO2 data
published by NOAA
<https://gml.noaa.gov/webdata/ccgg/trends/co2/co2_annmean_gl.txt>
Note
This is only approximately valid for years in the range 1949 - 2020
Examples
atmospheric_CO2(1990)
#> [1] 352.4456
atmospheric_CO2(2020)
#> [1] 411.8264
# Insensible
atmospheric_CO2(1800)
#> [1] 632.464
