Abstract:

This dataset reports CTD and water column profiles near the GC-600 natural oil seep in the Gulf of Mexico aboard R/V Point Sur cruise PS19_05 in the Gulf of Mexico from 2018-09-01 to 2018-09-04. Water column profiles were collected at 15 stations and the data includes CTD, dissolved oxygen, Chlorophyll-a Dissolved Organic Matter (DOM) fluorescence (fDOM), altimeter, Photosynthetically Available Radiation (PAR) and Surficial PAR (SPAR). During this cruise, we performed a series of CTD casts in and around the site to constrain water column structure and radium isotopes. The main objective of the cruise was to use the ROV Odysseus from Pelagic Research Services to directly sample hydrocarbons emanating from MegaPlume at GC-600 (27˚ 22.199'N 90˚ 34.262'W). During our time at sea, we further aimed to sample radium isotopes in the water column profiles in an upstream-downstream transect around the work site and also to collect sediment cores around the seep site to constrain seepage rates via radium isotopes.

Suggested Citation:

Rick Peterson. 2019. CTD and water column profiles collected from R/V Point Sur cruise PS19_05 in the Gulf of Mexico from 2018-09-01 to 2018-09-04. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/n7-e7hh-3y73

Purpose:

Data were collected to constrain the water column structure at and around the GC-600 natural oil seep.

Data Parameters and Units:

Latitude and longitude (decimal degrees), temperature (degrees C), conductivity (mS/cm), pressure (db), chlorophyll-a fluorescence (mg/m^3), Color Dissolved Organic Matter fluorescence (CDOM; mg/m^3), altimeter (m), dissolved oxygen concentration (mg/l), Photosynthetically Available Radiation (PAR; micromol m^-2 s^-1) and Surficial PAR (SPAR; micromol m^-2 s^-1], flags. Dataset includes cruise documentation and cruise report.

Instruments:

Sea-Bird SBE 9, WET Labs ECO-AFL/FL, WET Labs CDOM, SBE 43, Biospherical/Licor.

Individual Files: