This paper addresses changes of Antarctic Bottom Water (AABW) transport through the Vema Fracture Zone based on direct measurements and Glorys12v1 reanalysis. Instrumental measurements of currents and other principal hydrological characteristics were carried out during the 45th cruise of the R/V Akademik Nikolaj Strakhov in November 2019. According to the current velocity measurements in 2019, the transport in the Vema Fracture Zone is 0.9 Sv. Moreover, based on the distribution of dissolved oxygen concentration, it is more correct to consider the isotherm 1.7°С rather than 2°С as the upper boundary of the AABW. The reanalysis showed very good agreement with direct measurements. The average transport of bottom water during the reanalysis period is 0.66 Sv. In general, there is a tendency towards an increase in both transport and temperature over the 25-year period covered by reanalysis. The measurements of the bottom water temperature during twenty successive samplings showed changes from 1.36 to 1.41°С within a day. This interval almost completely covers the entire range of values observed in previous years.

中文翻译：

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深水和底水通过维马断裂带中大西洋海脊的输送

本文基于直接测量和 Glorys12v1 再分析，讨论了南极底水 (AABW) 运输通过维马断裂带的变化。2019 年 11 月，R/V Akademik Nikolaj Strakhov 号在第 45 次巡航期间进行了水流和其他主要水文特征的仪器测量。 根据 2019 年的水流速度测量，Vema 断裂带的输运量为 0.9 Sv。此外，根据溶解氧浓度的分布，将等温线 1.7°С 而不是 2°С 视为 AABW 的上界更为正确。再分析表明与直接测量非常吻合。再分析期间底水的平均输送量为 0.66 Sv。一般来说，在再分析所涵盖的 25 年期间，运输和温度都有增加的趋势。在连续 20 次采样期间对底部水温的测量显示，一天之内从 1.36 到 1.41°С 的变化。这个区间几乎完全涵盖了前几年观测到的整个数值范围。