Hydrographic and ADCP data obtained from Oceaneering vessel Ocean Intervention II in the Gulf of Mexico from 2017-06-18 to 2018-02-02

This dataset contains CTD and ADCP measurements obtained in the Gulf of Mexico in the GC600 block near the Megaplume natural seep site from 2017-06-18 to 2018-02-02. Two moorings, one instrumented with five CTD instruments at ~4, 14.1, 24.3, 34.5, and 44.7 meters above the bottom, were deployed at 27.3695N, 90.5712W in about 1186 m water depth. Deployment was from the Oceaneering International, Inc. vessel Ocean Intervention II. Time series of pressure, temperature, and salinity were collected between 2017-09-02 and 2018-02-02. Two ADCPs were also deployed and instrumented with one microcat each. The 300kHz ADCP was deployed at 27.3711N, 90.5736W in 1174 m of water and the 600kHz at 27.3700N, 90.5717W in 1182 m of water. Data were collected between 2017-09-02 and 2017-11-20 (300kHz) or 2017-12-06 (600 kHz). Instrument recovery was undertaken by the vessel Connor Bordelon, contracted by Oceaneering International. An additional six CTD profiles were collected in the area: two on 2017-06-29, two on 2018-09-02, one on 2018-09-02, and one on 2018-02-02.