Complex Oceanological Research during the 44th Cruise of the Research Vessel Akademik Nikolaj Strakhov in the Eastern Tropical Atlantic

Abstract

Geological, hydrological, hydrochemical, and biological research has been carried out in the eastern tropical Atlantic. Based on the multibeam echo-sounding and seismic profiling north of the Kane Gap (Sierra Leone Rise), an extensive sedimentary body (contourite fan) has been identified. Data of hydrophysical sounding allows assuming the existence of an overflow of the Antarctic Bottom Water (AABW) through the Kane Gap and its northward penetration. In the sediment cores (Middle Pleistocene to Holocene age), an influence of the AABW is reflected in the alternation of the high and medium carbonate dissolution rates.