GEOL 1003 Chapter : Ch10 Chemical Cycles Part2
Document Summary
Three important processes related to carbon and oxygen cycles in earth system: photosynthesis & respiration cycle. Plant growth net gain of biomass (carbon is temporarily sequestered in the biomass reservoir) O2 & c cycle: photosynthesis & respiration cycle. Double the biomass only doubles the o2 and co2 flux, not the reservoir volumes. O2 & c cycle: rapid burial of carbon breaks the cycle. Such as rapid burial of dead plants in swamps. Carbon is removed from the photo. -resp. cycle; atmospheric reservoir of c shrinks. 2 is more abundant in atmospheric reservoir e. g. , Glaciation and o2 rose to very high level. O2 & c cycle: chemical weathering of rocks = atmospheric co2 dissolves in water and becomes acid to erode rocks on land. Caco3 + co2 + h2o => ca2+ + 2hco3- (carbonate + carbon dioxide + water calcium + bicarbonate) Mg2sio4 + 4co2 + 4h2o => mg2+ + h4sio2 + 4hco3 (silicate rock + carbon dioxide + water ions +
