OOI Global Southern Ocean Array CTD and Discrete Water Sampling Data from Mooring Overturning Cruises in the Southern Pacific Ocean from 2015-2020 (OOI Cruise Data project)

<p><strong>OOI-CGSN CTD Sampling Guidelines</strong></p>

<p>In general, water samples are collected for analysis at depths that correspond to instrumentation making in situ measurements.&nbsp; For example, Near Surface Instrument Frames (NSIFs) have instrumentation that measure dissolved oxygen (DO), salinity (CTD), nitrate (NUTNR), the partial pressure of CO₂&nbsp;(CO₂), and chlorophyll a fluorescence, so water samples should be collected at the depth of the NSIF for analyses of all those parameters.&nbsp; Additionally, as noted above, OOI water sampling data are valid long-term datasets in and of themselves. Thus, some measurement locations are driven by broader science questions.</p>

<p>Soak Time –&nbsp;The CTD rosette should be allowed to equilibrate (e.g., the CTD sensor readout stabilizes) at the desired target depth for at least 1 minute or more depending on conditions.&nbsp; Longer soak times may occur to accommodate acoustic release testing or other activities.</p>

<p><strong>Citing OOI Data</strong></p>

<p>Refer to specific guidance related to citing&nbsp;OOI data on the OOI website at https://oceanobservatories.org/how-to-use-acknowledge-and-cite-data/.&nbsp;</p>