Abstract
The 25th cruise of R/F“Akademik Knipovitch” conducted in January–April of 1990 comprised investigations of total organic carbon (TOC) at the following sections: through the Polar Frontal Zone (PFZ) along 40° W, made in January and April; from the PFZ to the South Orkney Islands, and on the South Georgia shelf. The measurements made comprised TOC, organic nitrogen, nitrate, nitrite, ammonium nitrogen, phosphate and silicate.
The surface waters of the region were characterized by high heat content, which influenced the Antarctic phytosynosis function. The data obtained showed low content of organic matter (OM); high content of TOC, rising up to 3,5 mg m−3, was recorded at the photic layer and in the layer of OM accumulation, at the upper boundary of the Antarctic Deep Waters and the vertical boundaries of the Antarctic Intermediate Waters. The South Georgia shelf waters showed even distribution of TOC, about 0,2 mg m−3, being under the influence of the south periphery of the ACC waters.
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Dafner, E.V., Selin, P.Y. Organic matter in waters of the SW Atlantic sector of the Southern Ocean. GeoJournal 35, 71–77 (1995). https://doi.org/10.1007/BF00812629
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DOI: https://doi.org/10.1007/BF00812629