A University of Bristol research project has found that the fraction of CO2 in the atmosphere that is produced by humans is not increasing. Of the human produced CO2 around 55% is absorbed into oceans and plant life. This fraction has been (statistically) constant since all the way back to 1850.
This study re-examines the available atmospheric CO2 and emissions data including their uncertainties. It is shown that with those uncertainties, the trend in the airborne fraction since 1850 has been 0.7 ± 1.4% per decade, i.e. close to and not significantly different from zero.
This may seem to be a ‘So what?’ finding, but consider this: If we are nearing a ‘tipping point’, if the Earth is close to CO2 saturation, wouldn’t we expect less and less of (the tiny fraction of) CO2 we produce being sequestered? All of this is not know. The researchers themselves are wondering about this and arguing for a better understanding of processes of CO2 release in the atmosphere and absorption back into nature.
As for the discrepancy between this finding and dire warnings we’ve received over the years, not this remark (emphasis mine):
The strength of the new study, published online in Geophysical Research Letters, is that it rests solely on measurements and statistical data, including historical records extracted from Antarctic ice, and does not rely on computations with complex climate models.
As a WUWT commenter notes: ‘They don’t rely on climate models from superconfusers’.
The science is settled, my (crass synonym of hiney).