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CALCULATION OF CALCIUM ANOMALIES ON THE GREAT BAHAMA BANK FROM ALKALINITY AND CHLORINITY DATA 1
Author(s) -
Traganza Eugene D.,
Szabo Barney J.
Publication year - 1967
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1967.12.2.0281
Subject(s) - alkalinity , calcium , chemistry , liter , titration , mineralogy , environmental chemistry , inorganic chemistry , biology , organic chemistry , endocrinology
Regional calcium anomalies can be calculated to ± 1% from alkalinity and chlorinity data. The “noncarbonate” calcium: chlorinity ratio is conserved. Deviations arise from random errors or processes other than CaCO 3 precipitation, CO 2 loss, or evaporation. Calcium concentrations have been calculated from the equation [Ca 2 + (meq/liter) = Cl‰ + ½C.A.] with a precision of ± 0.01 meq/liter. In the field the value of K varies— from 0.479 to 0.506 (avg = 0.490)—suggesting that on the Great Bahama Bank, an accuracy of no more than ± 0.44 meq/liter or ca. 4% can be expected. Variation of the mean values of K may arise from systematic errors or from true variation of the ion: chlorinity ratios in different water masses. Dissolved calcium was determined using a high precision EDTA‐complexometric titration. The mean value for K , the “noncarbonate” : chlorinity ratio, was 0.481 ± 0.002 in July and 0.483 ± 0.003 in September 1964. The average : chlorinity weight ratios in July and September 1984 were 0.02113 at the bank edge, decreasing to 0.02033 with increased chlorinity.