CTD Data over a Repeated Section in the Vema Channel

This dataset contains CTD casts at repeated sections across the Vema Channel in the South Atlantic approximately along 31°12' S between longitudes 39°18.0' W and 39°30.0' W. The Vema Channel connects the deep-water parts of the Argentine and Brazil basins. The densest and coldest Antarctic Bottom Water spreads through this channel. The depths of the Vema Channel exceed 4600 m. Its width at its narrowest part is approximately 15 km. The channel was discovered in the 1950s and hydrological measurements began in 1972. The CTD-casts in the region of the standard section across the Vema Channel at latitude 31°12' S have been made 25 times from 1991 to 2020. In some years, a section of 3–6 stations was carried out, sometimes only one station at 31°12' S, 39°18' W was occupied. In this dataset, we present only the data of ten Russian sections.本数据集包含南大西洋维马海峡（Vema Channel）沿线重复断面的温盐深（CTD）剖面数据，采样断面大致沿南纬31°12′，西经39°18.0′至39°30.0′区间布设。维马海峡连通阿根廷海盆与巴西海盆的深水区，密度最高、温度最低的南极底层水（Antarctic Bottom Water）经此海峡输送。该海峡水深超过4600米，最窄处宽度约为15千米，于1950年代被发现，水文测量工作始于1972年。1991年至2020年间，针对沿南纬31°12′布设的维马海峡标准断面区域，共计开展了25次CTD剖面观测；部分年份会布设3至6个观测站位组成的断面，有时仅在南纬31°12′、西经39°18′处布设单个观测站位。本数据集仅收录其中10个俄罗斯观测断面的数据。