Deepwater Horizon Oceanographic CTD Data from SEWARD JOHNSON

Chemical and physical oceanographic profile data were collected aboard the SEWARD JOHNSON in the Gulf of Mexico from July 24 to August 2, 2010, in direct response to the Deepwater Horizon oil spill. The dataset includes measurements of CDOM fluorescence, conductivity, dissolved oxygen, hydrostatic pressure, salinity, sound velocity, temperature, and water density, collected using CTD, fluorometer, and oxygen meter instruments. Data quality was assured and controlled by the National Coastal Data Development Center.

Use Cases

• Analyzing the vertical distribution of dissolved oxygen and salinity to assess water column stratification post-spill.
• Correlating CDOM and fluorescence measurements with subsurface hydrocarbon dispersion.
• Modeling changes in water density and sound velocity for oceanographic circulation studies in the Mississippi Canyon area.
• Investigating the relationship between hydrostatic pressure (depth) and multiple chemical parameters from CTD casts.

Strengths

• Data collection was focused on a specific, critical environmental event over a 10-day period from 2010-07-24 to 2010-08 02.
• Underwent quality assurance and control procedures by the National Coastal Data Development Center to validate scientific integrity.
• Includes a specific set of 9+ measured parameters: CDOM fluorescence, conductivity, dissolved oxygen, fluorescence, hydrostatic pressure, salinity, sound velocity, temperature, and water density.

Limitations

• Exact row count, file size, and complete column list are not provided by any source.
• Sources conflict on the last updated date, with one platform listing 2026-04-01 and another listing 2010-08-02.

Provenance

Source

Subsurface Monitoring Unit (SMU), consisting of multiple government and corporate agencies, collected for NOAA.

Collection Method

Data gathered from CTD casts, fluorometer, and oxygen meter aboard the SEWARD JOHNSON research vessel.

Time Range

2010-07-24 to 2010-08-02

Freshness

2026-04-01 15:28:53.622720

Geography

Gulf of Mexico, specifically the Mississippi Canyon area related to the Deepwater Horizon event.