We conducted experiments to measure the sponge bioerosion rate on coralline algae based on the alkalinity anomaly technique. From the experiment, we calculated the change in total alkalinity (ΔT) (µmol/l). Further, the formula for calculating the mass of Calcium carbonate dissolved by erosion is
M (CaCO3) = 0.5 (mol eq-1)x ΔT x 100 x Vsw x ρsw
Here, ΔT = change in alkalinity in eq kg-1
100 = molecular mass of CaCO3
Vsw = Volume of seawater (L)
ρsw = density of seawater
Looking forward to some method/formula to convert the Change in Total alkalinity value in µmol/l to Eq/kg.
Thanks in Advance.
Hello,
As far as I remember 1 litre of seawater at 20°C and salinity 35 weights 1,025 kg (density) so to get your conversion you have to divide the value per liter by 1,025, but this works only if temperature and salinity are as above, for other values you have to look at hydrographic table to get the exact water density.
1 litre seawater = c. 1.03 kg, so umol/litre = umol/1.03 kg
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