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+--- Thread: Article Bunking up the carbon cycle (/thread-15307.html)
Bunking up the carbon cycle - confused2 - Jan 23, 2024
This is a paper by Hermann Harde "Scrutinizing the carbon cycle and CO2 residence time in the atmosphere" claiming the average residence time of anthropic CO2 is 4 years. Very attractive to the "CO2 is plant food" brigade. A fine example of anything you want to be true can probably be found on the Internet. I suggest (if so minded) .. read and enjoy. The 'trick' is that the post-industrial temperature rise of 0.8C would naturally cause an increase of CO2 from 280ppm to almost what we observe - only an extra 15% coming from human activities. So we are merely observing a natural process for which we should feel no guilt.
Quote:The anthropogenic contribution to the actual CO2 concentration is found to be 4.3%, its fraction to the CO2 increase over the Industrial Era is 15% and the average residence time 4 years.
https://www.sciencedirect.com/science/article/abs/pii/S0921818116304787#:~:text=Temperature%20dependent%20natural%20emission%20and%20absorption%20rates%20are%20considered.&text=The%20average%20residence%20time%20of,found%20to%20be%204%20years.&text=Paleoclimatic%20CO2%20variations%20and,growth%20rate%20are%20well%20reproduced.&text=Human%20emissions%20only%20contribute%2015,increase%20over%20the%20Industrial%20Era.