Sampling was conducted on R/V Pelican cruise PE23-20 in the Northern Gulf of Mexico in May 2023. All CTD casts were conducted according to standard ship operator procedure. Refer to the Cruise Plan (Supplemental File) for more information.
The data were collected using a SeaBird 911 plus system with twelve 12-liter Niskin bottles. The instruments included in the 911 plus suite are dual Temperature (SBE 3), dual Conductivity (SBE 4), and dual Oxygen (SBE 43) sensors. Additionally, the suite included an SBE 27 pH/Oxidation, Wetlabs ECO Fluorometer, and a Wetlabs CDOM sensor. Serial numbers and calibration information are stored in the Header Information included in the original .cnv files (see Supplemental Files for an example header file).