OCEAN VERITAS: Water Chemistry and Physics from the Deepwater Horizon Spill

Oceanographic data from the research vessel OCEAN VERITAS captured a specific snapshot of the Gulf of Mexico's water column from August 30 to September 3, 2010, directly in response to the Deepwater Horizon oil spill. It includes measurements of hydrocarbons, conductivity, dissolved oxygen, salinity, and temperature, collected using CTD rosettes, fluorometers, and laboratory analysis of water and sediment samples. The dataset also contains derived products like charts and maps created for real-time decision support during the spill response.

Use Cases

• Tracking subsurface oil plume dispersion based on volatile organic compound (VOC) and total petroleum hydrocarbon (TPH) measurements.
• Assessing water column stratification and mixing post-spill using conductivity, temperature, and density (CTD) profiles.
• Modeling dissolved oxygen depletion from microbial degradation of oil based on oxygen meter and chemical data.
• Calibrating remote sensing models for colored dissolved organic matter (CDOM) with in-situ fluorometer readings.
• Archiving forensic chemical evidence of specific contaminants like 1,2-dichloroethane or benzo(a)pyrene from the spill area.

Strengths

• Data collection was part of a coordinated, multi-agency Subsurface Monitoring Unit (SMU) response to a major environmental event, suggesting structured sampling.
• CTD data underwent preliminary quality assurance and control procedures at the National Coastal Data Development Center (NCDDC).
• Includes both raw instrument data (e.g., CTD, fluorometer) and provisional results from onshore laboratory chemical analysis, providing multiple data layers.

Limitations

• Critical metadata is missing or conflicting: row counts, file sizes, specific column names, and license information are not provided across platforms.
• The analytical chemistry data are explicitly noted as 'provisional', indicating they may not be final or fully validated.
• Temporal coverage is very brief (5 days), limiting analysis of long-term spill impacts or recovery.

Provenance

Source

Subsurface Monitoring Unit (SMU), consisting of multiple government and corporate agencies, collected aboard the R/V OCEAN VERITAS. Data hosted by NOAA/NCEI (Accession 0069107).

Collection Method

In-situ collection via CTD rosette, bottle samples, fluorometer, and oxygen meter, supplemented by onshore laboratory analysis of water and sediment.

Time Range

2010-08-30 to 2010-09-03

Freshness

Metadata was last updated on datagov on 2026-04-01, but the core data collection ended on 2010-09-03.

Geography

Gulf of Mexico