Conductivity, Temperature and Depth (CTD) data from the SIPEX II voyage of the Aurora Australis

Multiple CTD (conductivity, temperature, depth) casts were deployed during the SIPEX II AAD Marine Science voyage in September-November 2012. The system uses a descending rosette capable of holding up to 24 CTD bottles. During this voyage the CTD rosette also housed two krill traps (using controllable lights) and two GoPro cameras contained in pressurised, waterproof containers that were used to monitor the krill traps and view objects both on the sea bed and in the water column.

Some functions of the GoPro cameras could be controlled from within the ship using the same transmission cable used by the CTD system. These functions included being able to change the focus setting of the cameras or start/stop recording. More information about the krill traps and cameras is contained in the SIPEX II Bottom Krill dataset.

When a bottle is 'fired' from the ship it briefly opens, draws in water samples and closes again. It is not reopened until it is brought on board the ship. Bottles are opened at different depths to obtain samples from these depths. The depths vary from cast to cast and so are recorded in the CTD Log sheets (contained in this dataset as PDF files).

Only raw data is contained in this dataset. The raw data was used by a variety of experiments during the SIPEX II voyage to produce results applicable to each experiment.

Thanks go to the P and O crew of the RV Aurora Australis for their assistance during CTD operations.

2012年9月至11月，在SIPEX II AAD海洋科学考察航次期间，共开展了多轮CTD（conductivity, temperature, depth）测站观测作业。该观测系统搭载可容纳最多24个CTD采水器的下放式采水器阵列。本次航次中，该CTD采水器阵列还搭载了两台配备可控灯光的磷虾诱捕器，以及两台封装于加压防水容器内的GoPro相机，用于监测磷虾诱捕器状态并观测海床及水体中的目标物体。

可通过CTD系统配套的同一传输线缆，在科考船控制台远程操控GoPro相机的部分功能，包括调整相机对焦参数以及启动/停止录制操作。有关磷虾诱捕器与相机的更多详细信息，请参阅SIPEX II Bottom Krill数据集。

当采水器从船台被触发释放时，会短暂开启以抽取水样，随后即刻闭合，直至被回收至科考船甲板前不会再次开启。采水器会在不同预设深度开启以获取对应水层的水样，各测站的采样深度各不相同，相关深度信息均记录于CTD日志表中（本数据集以PDF文件形式提供该日志表）。

本数据集仅包含原始观测数据。本次SIPEX II航次中的多项实验均使用该原始数据，以生成适配各实验需求的专属研究结果。

特此感谢南极光号（RV Aurora Australis）科考船的P&O船组在CTD作业期间提供的协助。