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首页> 外文期刊>Oceanology >Antarctic Bottom Water Flow in the Western Part of the Romanche Fracture Zone Based on the Measurements in October of 2011
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Antarctic Bottom Water Flow in the Western Part of the Romanche Fracture Zone Based on the Measurements in October of 2011

机译：基于2011年10月的测量结果，罗曼奇断裂带西部的南极底部水流

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摘要

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 6 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 = 10~6 m~3/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.
机译：根据赤道西部地区CTD和LADCP剖面图研究了南极底部水流向22°10'-22°30'W处Romanche断裂带通道的入流区域的特性。断裂带。在裂缝南壁上的槛处发现了一个深水白内障，深度约为4600 m，这与深渊流有关，其潜在温度低于1°C。在此温度范围内，流入裂缝通道的水完全位于该窗台上。 2011年在底部附近记录的最低潜在温度6等于0.51°C，比在裂缝西部测得的最低温度低约0.12°C。白内障中的水迁移量估计为0.2 Sv（1 Sv = 10〜6 m〜3 / s），大约是南极底水总迁移量（θ<1.9°C）的已知估计值的30％。骨折。发现白内障区的交叉等温混合的强度非常高。对底部地形数据（包括历史的WOD09数据集）的分析表明，1.00°<θ<1.70°C的水流入裂缝的通道很可能完全位于调查区域的几条通道中在2011年，通过西和东大西洋之间的罗曼奇断裂带与θ> 1.70°C的深海水进行水交换时，也可以通过Vema Deep区域裂缝南北壁的凹陷进行。

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