Abstract:

Conductivity, temperature and depth data from the ship's CTD, which is deployed at each of the DEEPEND stations. Depth of cast is variable, but extends from near-surface waters to below the euphotic zone. This data is used in the assessment of the water column's vertical structure, and for comparison with physical models. Data were collected during cruise DP03 in the northern Gulf of Mexico, May 2016.

Suggested Citation:

English, D., Hu, C., Cook, A., Sutton, T.. 2018. Conductivity, temperature and depth (CTD) data for DEEPEND stations, cruise DP03, May 2016. Distributed by: Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC), Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7R49P43

Publications:

Johnston, M. W., Milligan, R. J., Easson, C. G., deRada, S., English, D. C., Penta, B., & Sutton, T. T. (2019). An empirically validated method for characterizing pelagic habitats in the Gulf of Mexico using ocean model data. Limnology and Oceanography: Methods. doi:10.1002/lom3.10319

Purpose:

To assess the water column's vertical structure.

Data Parameters and Units:

Raw files: Pressure (db), Temperature (ITS-90, deg C), Temperature (ITS-90, deg C), Conductivity (S/m), Oxygen SBE 43 (mL/L), Fluorescence WET Labs ECO-AFL/FL (mg/m^3), Beam attenuation WET Labs C-Star (1/m), Potential temperature (ITS-90, deg C), Salinity (psu), Oxygen saturation Weiss (mL/L), Depth (m), Sound velocity (Chen-Millero, m/s), Density (sigma-t, kg/m^3) Binned files: Cruise ID, Castname, Latitude (decimal degrees), Longitude (decimal degrees), Mean downcast time (MM/DD/YYYY HH:MM), Downcast start (MM/DD/YYYY HH:MM), Downcast end (MM/DD/YYYY HH:MM), Maximum cast depth (m), Depth bin (m), Depth (m), Temperature (deg C), Salinity (psu), Sigma t (kg/m^3), Chlorophyll fluorescence (mg/m^3), Beam attenuation (1/m), Fluorescence Aquatracker (1/m), Dissolved oxygen (mL/L), Oxygen saturation (% saturation), Absolute salinity (g/kg), Conservative temperature (deg C)

Methods:

In addition to the raw CTD data, 1 meter depth binned data is available for each CTD cast. The chlorophyll and CDOM fluorescence values have been converted using a regression to discrete water sample measurements made during the cruise. Here, the in situ fluorometry units for the chlorophyll_a concentrations units are mg/m^3, and the CDOM units are absorption of 400nm light (1/m).

Individual Files: