Impact of cyclic freezing on precipitation of silica in Me-SiO2-H2O systems and geochemical implications for cryosoils and -sediments

Cyclic freezing can significantly reduce the geochemical and ecological availability of silica. On the other side, the decrease of dissolved silica induced by freezing provokes an increase of undersaturation with respect to silicates in the re-thawed soil or interstitial solutions, which stimulates the dissolution of siliceous minerals and rocks.