Temperature and salinity data from the Indian scientific expeditions to Southern Ocean

Temperature and salinity data collected from the various Southern Ocean expeditions (SOE) during 2010, 2011, 2017, 2018, and 2020. Except for SOE 2010, the Conductivity, Temperature, Depth (CTD) instrument used during the cruises were SBE 911plus, with the temperature and conductivity accuracy of ± 0.001°C and ±0.0001 S m−1, respectively. During SOE 2010, a portable SBE 19plus CTD was used to collect the temperature and salinity data. The CTD data was processed using the standard protocol of manufacture supplied software downcast data. Field calibration of CTD salinity data was carried out against the laboratory determination of salinity using salinometer (Guildline 8400B). We have used UCTD (Rudnick and Klinke, 2007) during December-2017 (referred as austral summer 2018) and XCTD during January-2017 for the collection of temperature and salinity along a section from 60°S and 67°S between 70°E and 74°E. The XCTD profiles were quality controlled by following the guidelines in the Uchida et al. (2011). The temperature accuracy of XCTD and UCTD probes are ±0.02°C.

本数据集收录了2010年、2011年、2017年、2018年和2020年间，通过多次南极海域考察（SOE）所收集的温度与盐度数据。除2010年SOE外，考察期间所使用的导电率、温度和深度（CTD）仪器为SBE 911plus，其温度与导电率精度分别为±0.001°C和±0.0001 S m−1。2010年SOE期间，则采用了便携式SBE 19plus CTD仪器进行温度与盐度数据的采集。CTD数据经过制造商提供的标准软件下传数据协议进行处理。CTD盐度数据的现场校准是通过与使用Guildline 8400B盐度计在实验室中进行的盐度测定进行比对实现的。在2017年12月（即南半球的夏季2018年），我们使用了UCTD（Rudnick and Klinke, 2007）进行温度与盐度的采集，而2017年1月则使用了XCTD。XCTD的剖面数据通过遵循Uchida等（2011）提出的指南进行质量控制。XCTD和UCTD探头温度的精度均为±0.02°C。