Obviously a lot of research has happened since then, so I looked it up, and the lag period between CO2 and temperature rise is much shorter than I expected. It seems it is just a decade - so if we went to carbon negative today, we could see results in under 10 years [1] [2].
Kind of unclear if the baseline carbon we could achieve will result in YoY decrease in temperature, given the feedback loops and it already raising temperatures every year.
If the research you mentioned is predicated on massive carbon takeback then I am highly suspicious. The public sector doesn't have the will, and the private sector doesn't have the incentive.
[1]: https://iopscience.iop.org/article/10.1088/1748-9326/10/3/03...
[2]: https://climate.nasa.gov/faq/16/is-it-too-late-to-prevent-cl...