Finds that for calcite, undersaturation occurs when carbonate
ion concentration drops below 42 µmol kg - 1
Holds that for most open - ocean surface waters, aragonite undersaturation occurs when carbonate
ion concentrations drop below approximately 66 µmol kg - 1
Not exact matches
Once a critical point is reached, nucleation occurs and the amount of free calcium
ions drops to a value that corresponds to the particular solubility
concentration of the precipitated phase according to a typical LaMer diagram (25).
From preindustrial levels, contemporary surface ocean pH is estimated to have
dropped on average from 8.2 to 8.1, or by about 0.1 pH units (a 26 % increase in hydrogen
ion concentration), and further decreases of 0.22 to 0.35 pH units are projected over this century unless carbon dioxide emissions are significantly reduced (Orr et al., 2005; Bopp et al., 2013).
From preindustrial levels, contemporary surface ocean pH is estimated to have
dropped on average from 8.2 to 8.1, or by about 0.1 pH units (a 26 % increase in hydrogen
ion concentration), and further decreases of 0.22 to 0.35 pH units are projected over this century unless carbon dioxide emissions are significantly reduced.
Likewise when ocean
concentrations of H +
ions increase, they more readily bond to the bicarbonate and carbonate
ions to minimize the
drop in pH and form more CO2, which can be quickly utilized during photosynthesis.