naa a22 4500 510764983 CHVBK 20180411083153.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1134/S0001437013050147 doi (NATIONALLICENCE)springer-10.1134/S0001437013050147 Antarctic bottom water flow in the western part of the Romanche Fracture Zone based on the measurements in October of 2011 [Elektronische Daten] [R. Tarakanov, N. Makarenko, E. Morozov] The properties of the Antarctic Bottom Water flow in the region of its inflow to the channel of the Romanche Fracture Zone at 22°10′-22°30′ W are studied on the basis of CTD and LADCP profiling in the western part of the equatorial fracture zone. A deep water cataract was found at the sill over the southern wall of the fracture with a depth of approximately 4600 m, which is associated with the abyssal flow, whose potential temperature is lower than 1°C. The inflow of water into the channel of the fracture in this temperature range is fully localized over this sill. The minimum potential temperature θ recorded in 2011 near the bottom was equal to 0.51°C, which is lower approximately by 0.12°C than the minimum temperatures ever measured in the western part of the fracture. The water transport in the cataract was estimated at 0.2 Sv (1 Sv = 106 m3/s), which is approximately 30% of the known estimates of the total transport of Antarctic Bottom Water (θ < 1.9°C) through the fracture. The extremely high intensity of the cross isothermal mixing in the cataract region was found. The analysis of the bottom topography data, including the historical WOD09 dataset, shows that the inflow of water with 1.00° < θ < 1.70°C into the channel of the fracture is most likely fully localized in a few passages in the region of the survey in 2011, while the water exchange with the abyssal waters with θ > 1.70°C through the Romanche Fracture Zone between the West and East Atlantic can also occur through the depressions in the southern and northern walls of the fracture in the region of the Vema Deep. Pleiades Publishing, Inc., 2013 Tarakanov R. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia aut Makarenko N. Lavrentiev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia aut Morozov E. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia aut Oceanology Springer US; http://www.springer-ny.com 53/6(2013-11-01), 655-667 0001-4370 53:6<655 2013 53 11491 https://doi.org/10.1134/S0001437013050147 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0001437013050147 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tarakanov R. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia aut NATIONALLICENCE 700 1- Makarenko N. Lavrentiev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia aut NATIONALLICENCE 700 1- Morozov E. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia aut NATIONALLICENCE 773 0- Oceanology Springer US; http://www.springer-ny.com 53/6(2013-11-01), 655-667 0001-4370 53:6<655 2013 53 11491 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer