It's a long time since I did anything in this field, so this is some ad
hoc thinking.
Soil PCO2 is much higher than in the atmosphere. An old paper on this is ...
Drake, J.J. and Wigley, T.M.L., 1975: The effect of climate on the
chemistry of carbonate groundwater. Water Resources Research
Agree that if your only acid is carbonic then CO2 will be consumed, assuming
CaCO3 doesn't reprecipitate. If the soil acidity is caused by other acids then
you lose CO2 e.g.: H2SO4 + CaCO3 --- CaSO4 + H2O + CO2. All farmers care
about is losing acidity when they limestone. In our current
Duncan,
Repeating what others have already said, kudos on your report, which
represents a great first step toward a systematic comparison of
competing CDR technologies/NETs. One of your main policy conclusions
is that NETs should be excluded from carbon markets due to the
possible (probable?)
Sir
I write with deep concern at the news of the delay to the SPICE experiment.
Please can you provide a fuller statement regarding the delay to this
project? It is extremely worrying that these benign and important
experiments in climate science are being held up, based on what appears to
be
Thanks John
Please keep me in the loop on your thoughts on combining biochar and
soil mineralisation with rock dust. We need all the sensible ideas we
can get.
Regarding the potential benefits of biochar, I tried to include
potential benefits for any technique where they were suggested or
