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.
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Funding
The expedition was financed by the IO RAS state assignment no. 0149-2019-0013 (Canary Basin: development of a digital elevation model of the bottom topography based on multibeam echo-sounder data, lithological description of the sediment core; Kane Gap: collection and analysis of aeolian particles, hydrochemical research) and no. 0149-2019-0009 (biological studies).
The analysis of hydrological and hydrophysical data in the area of the Kane Gap, the development of a digital elevation model of the bottom topography based on multibeam echo-sounder data, as well as paleoceanographic studies were carried out as part of the RSF project no. 19-17-00246.
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Bashirova, L.D., Sivkov, V.V., Kuleshova, L.A. et al. Complex Oceanological Research during the 44th Cruise of the Research Vessel Akademik Nikolaj Strakhov in the Eastern Tropical Atlantic. Oceanology 60, 570–572 (2020). https://doi.org/10.1134/S0001437020040025
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DOI: https://doi.org/10.1134/S0001437020040025