ACVT_HSWS_O_HFREE       Conversion ratio H_SWS/H_free from free
                        pH-scale to SWS scale
ACVT_HTOT_O_HFREE       Conversion ratio H_Tot/H_free from free
                        pH-scale to Total scale
AK_AMMO_1_YAMI95        Dissociation constant of ammonium in sea-water
                        [mol/kg-SW]
AK_BORA_DICK90          Boric acid dissociation constant KB in
                        mol/kg-SW
AK_CARB_0_WEIS74        Henry's constant K0 in (mol/kg-SW)/atmosphere
AK_CARB_1_LUEK00        First dissociation constant of carbonic acid in
                        mol/kg-SW from Luecker et al.
AK_CARB_1_MILL95        First dissociation constant of carbonic acid in
                        mol/kg-SW from Millero et al. (1995)
AK_CARB_1_ROYE93        First dissociation constant of carbonic acid in
                        mol/kg-SW, from Roy et al.
AK_CARB_2_LUEK00        Second dissociation constant of carbonic acid
                        in mol/kg-SW from Luecker et al.
AK_CARB_2_MILL95        Second dissociation constant of carbonic acid
                        in mol/kg-SW from Millero et al. (1995)
AK_CARB_2_ROYE93        Second dissociation constant of carbonic acid
                        in mol/kg-SW from Roy et al.
AK_H2S_1_MILL95         Dissociation constant of hydrogen sulfide in
                        sea-water
AK_HF_PEFR87            Dissociation constant of hydrogen fluoride in
                        sea-water [mol/kg-SW]
AK_HSO4_DICK90          Dissociation constant of hydrogen sulfate
                        (bisulfate) in sea-water
AK_PHOS_1_MILL95        First dissociation constant of phosphoric acid
                        (H3PO4) in seawater
AK_PHOS_2_MILL95        Second dissociation constant of phosphoric acid
                        (H3PO4) in seawater
AK_PHOS_3_MILL95        Third dissociation constant of phosphoric acid
                        (H3PO4) in seawater
AK_SILI_1_MILL95        First dissociation constant of sillicic acid
                        (H4SiO4) in seawater
AK_W_MILL95             Water dissociation constant Kw in (mol/kg-SW)^2
solve_pH_from_AT        Solver for the total alkalinity-pH equations
