Abstract
Detailed vertical profiles of salinity, temperature, 10 soluble inorganic and organic constituents and six particulate organic constituents have been determined at a station over the Santa Catalina Basin. Irregularities in the Profiles suggest nine “layers” in the 1,300 m column of water; four of the layers are clearly defined by physical properties and the remainder largely by variations in their dissolved organic matter and materials such as phosphate, nitrate, and silicate.The ratio of carbon oxidized to nitrate and to phosphate formed in the same water averaged 100 : 18.4 : 3.0 by weight, a ratio to be expected from the oxidation of oceanic phytoplankton. The average ratio by weight of carbon to nitrogen to phosphorus in dissolved organic compounds was 100 : 11 : 1, and the ratio for the particulate organic matter was similar.Except in the top 200 m, the amount of dissolved organic carbon was about 20% of the amount of carbon oxidized and the amount of particulate organic carbon was about 10% of the amount of dissolved organic carbon in the same water. Other ratios are given for silicate, nitrogen, and phosphorus.
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