Dataset: CTD and underwater mass spectrometer data acquired in 2017 aboard the RV/Endeavor (cruise EN602) in the the subtropical Atlantic using a Triaxus tow vehicle.

EN602: Departure port of Gulfport, MS to Narragansett Bay, Rhode Island.  Problems with Triaxus overheating restricted data collection, to a region of the subtropical Atlantic between 28 N and 40 N.  The ship track followed the same coordinates used during EN575.The SWIMS instrument uses a quadrupole mass analyzer to measure in-situ gas concentration.  Ion currents were calibrated using an in-situ calibration technique and a Recurrent Neural Network to remove bias introduced by pressure and temperature changes on the membrane inlet.

In this application we towed the mass-spectrometer through water depths from 0 to 150 m aboard a Triaxus tow vehicle, corresponding to region where sunlight penetrates the surface ocean. The SWIMS was used to measure oxygen, argon, carbon dioxide, and nitrogen in seawater.