aCO2_inverse {growR}

Concentration representative year

Description

Inverse of 'atmospheric_CO2': retrieve the year by which a given CO2 concentration is reached.

Usage

aCO2_inverse(aCO2)

Arguments

aCO2

Target CO2 concentration in ppm.

Details

Does not give a reasonable result for values below 317ppm, corresponding to the year 1949, as this is where the minimum of the parabola is located in the second order fit to the data that was used in aCO2.fct.

Value

year Approximate year (as floating point number) by which target concentration is reached.

Examples

aCO2_inverse(420)
aCO2_inverse(700)
# Insensible
aCO2_inverse(100)