Digitizations...

Fig. 4 from: Graven, H. et al (2020). doi:10.1029/2019GB006170.

X-axis:
date pixels
1940  228
1950  365
1960  503
1970  640
1980  777
1990  915
2000 1052
2010 1189

(1189-228)/70 = 13.72857 pixels/year

px(yr) = 640 + ((yr-1970)*13.72857)

Y-axis:
Δ14‰	pixels
800	106
700	188
600	270
500	352
400	433
300	516
200	597
100	679
0	761
-100	843
-200	924

(924-106)/1000 = 0.818 pixels / mil

px(Δ14‰) = 597 - ((Δ14‰ - 200)*0.818)
Δ14‰(px) = 200 - ((px - 597)/0.818)

Correspondence to:
Dr. Heather Graven <h.graven@imperial.ac.uk>

- - -


A New Approach to the CO2 Airborne Fraction: Enhancing Statistical Precision and Tackling Zero Emissions

https://arxiv.org/abs/2311.01053#:~:text=The%20consensus%20estimate%20of%20the,the%20oceanic%20and%20terrestrial%20biospheres.


j.rogelj@imperial.ac.uk