Abstract:

This dataset contains CTD data that were sampled at four stations from 2012-04-11 to 2012-04-14. The dataset includes conductivity, temperature, salinity, dissolved oxygen concentration, seawater density, beam attenuation and transmission, fluorescence, surface irradiance, and depth parameters. This dataset supports the publication: Cardona, Y., Bracco, A., Villareal, T. A., Subramaniam, A., Weber, S. C., & Montoya, J. P. (2016). Highly variable nutrient concentrations in the Northern Gulf of Mexico. Deep Sea Research Part II: Topical Studies in Oceanography, 129, 20–30. doi:10.1016/j.dsr2.2016.04.010

Suggested Citation:

Vernon Asper. 2019. CTD data collected aboard R/V Endeavor cruise EN505 in the Gulf of Mexico from 2012-04-11 to 2012-04-14. Distributed by: Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC), Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7RN35S9

Publications:

Cardona, Y., Bracco, A., Villareal, T. A., Subramaniam, A., Weber, S. C., & Montoya, J. P. (2016). Highly variable nutrient concentrations in the Northern Gulf of Mexico. Deep Sea Research Part II: Topical Studies in Oceanography, 129, 20–30. doi:10.1016/j.dsr2.2016.04.010

Purpose:

Cruise EN515 was the second water-column cruise of the ECOGIG consortium, which is funded by the Gulf of Mexico Research Initiative. Our central research questions focus on the impact of oil and gas on the water column and benthic communities of the Gulf of Mexico. We are using cold seeps as natural analogs of human oil releases, and our cruise focused on sampling three such seeps as well as a control site and a site with persistent surface slicks of oil. We accomplished the primary goals of our research program by sampling a total of 4 stations in the northern Gulf of Mexico. The geochemical, biological, and molecular samples we collected, and the suite of experiments we carried out, will complement our earlier efforts (EN509/EN510) in providing us with an assessment of the ways that oil and gas released at depth enter the pelagic food web. The general purpose of the cruise was the lander and trap deployments.

Data Parameters and Units:

Time (Seconds since 1970-01-01 00:00:00); latitude (degrees_north); longitude (degrees-east); sea_water_pressure (dbar); depth (m);depth 2 (m); sea_water_temperature (deg C); sea_water_temperature 2 (deg C); sea_water_electrical_conductivity (S/m); sea_water_electrical_conductivity 2(S/m); sea_water_salinity (psu); sea_water_salinity 2(psu); Oxygen raw SBE 43 (volt); dissolved_Oxygen_concentration (umol/kg); dissolved_Oxygen_concentration 2 (umol/kg); dissolved_Oxygen_concentration 3 (umol/kg); dissolved_Oxygen_concentration 4 (umol/kg); sea_water_density_sigma_theta (kg/m^3); sea_water_density_sigma_theta 2(kg/m^3);volume_beam_attenuation_coefficient_of_radiative_flux_in_sea_water (1/m); light transmission(%); light_irradiance_surface_spar (W/m^2); Fluorescence (mg/m^3); average-speed_of_sound_in_sea_water (m/s); average-speed_of_sound_in_sea_water 2 (m/s); altimeter (m);potential_Temperature (deg ); potential_Temperature 2 (deg ); Descent Rate (m/s); geopotential_height_anomaly (J/kg). CTD stations, date and time, and locations are as follows: CTD001: 2012-04-13T19:18:19 29.0765 -88.36683 CTD002: 2012-04-14T16:19:23 29.06267 -88.38067 CTD003: 2012-04-14T17:44:05 29.06467 -88.372 505PxaooFN1: 2012-04-11T21:25:07 30.35717 -89.089

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