Hadal, > 6000 m deep shipborne Sea-Bird Electronics SBE 911plus Conductivity Temperature Depth (CTD) data are obtained using two different systems in the vicinity of the Earth’s deepest point, in the Challenger Deep, Mariana Trench 14 years apart. Below 7000 m in very weakly density stratified waters, the salinity data from both sets show an artificial increase with depth of about 10 –6 g kg −1 m −1 that is not covered by the SBE linear pressure correction to the conductivity data. With the aid of independent water sample data, salinity is corrected and an additional algorithm for the pressure correction on conductivity data is formulated. The corrected salinity data still weakly increase with depth, together with a decrease in temperature, which may point at an influx of dense modified Antarctic bottom water. The corrected density variations with depth are used in calculations of deep turbulence values.

中文翻译：

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进一步修正压力对来自深海深度的 SBE911 CTD 电导率数据的影响

Hadal，> 6000 m 深的船载 Sea-Bird Electronics SBE 911plus 电导温度深度 (CTD) 数据是使用地球最深点附近的两个不同系统获得的，位于马里亚纳海沟的挑战者深渊，相隔 14 年。在非常弱的密度分层水域中，低于 7000 m，来自两组的盐度数据都显示人工增加的深度约为 10 –6 g kg -1 m -1 ，这未被 SBE 对电导率数据的线性压力校正所涵盖。在独立的水样数据的帮助下，盐度得到了修正，并制定了一个额外的算法，用于对电导率数据进行压力修正。修正后的盐度数据仍然随着深度的增加而微弱地增加，同时温度也降低，这可能表明南极底水有密集的改良后的流入。