Abstract:

​​The R/V Atlantis cruise AT26-13 set sail with the HOV Alvin on board on March 30, 2014. The objectives of the cruise were to visit sites impacted by the Macondo Blowout as well as n​atural seeps sites dominated by oil and gas discharge. The science team included biological and chemical oceanographers, geochemists, microbiologists, as well as a tream equipped for remote sensing and documentation of seafloor dynamics using in situ camera systems. The cruise sailed on March 30 and returned April 23. GoMRI funded Alvin dives occurred on March 31st and April 1st of 2014. This dataset includes sediment samples collected on those dives.

Suggested Citation:

Samantha Joye. 2016. Sediment chemistry data collected during R/V Atlantis/Alvin (DSV-2) cruise AT26-13 in the northern Gulf of Mexico from 2014-03-31 to 2014-04-01. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7NS0RW0

Publications:

Rogener, M. K., Bracco, A., Hunter, K. S., Saxton, M. A., & Joye, S. B. (2018). Long-term impact of the Deepwater Horizon oil well blowout on methane oxidation dynamics in the northern Gulf of Mexico. Elem Sci Anth, 6(1), 73. doi:10.1525/elementa.332

Purpose:

The purpose of this study was to investigate sediment geochemistry in the northern Gulf of Mexico to track the continuing impact of the Deepwater Horizon blowout.

Data Parameters and Units:

Location; Alvin Dive (dive number); Collection type, Lat (latitude, degrees decimal minutes); Long (longitude, degrees decimal minutes); Date (dd/mm/yyyy); Time (L, Local); Time (Z, zulu); Depth (m, sampling depth of seafloor); Depth Range (cm, depth in sediment), Sediment pH; Porewater pH; salinity (psu); NH4 (uM); NO2 (um); NOx (uM, NO3+NO2); NO3 (um); DIN (uM, dissolved inorganic nitrogen); TDN (um, total dissolved nitrogen); NH4 (uM, used for DON measurement); DON (uM, dissolved organic nitrogen); PO4 (uM); DOC (uM, dissolved organic carbon); CH4 (uM); H2 (nM); H2S (mM); Sulfate (mM); Sodium (mM); Potassium (mM); Magnesium (mM); Calcium (mM); Methane Oxidation (pmol cc-1 d-1); Sulfate Reduction (pmol cc-1 day-1); Porosity (%); SOM (LOI, %); TPN (%, total particulate nitrogen); TPC (%, total particulate carbon); POC (%, particulate organic carbon); PIC (%, particulate inorganic carbon); TPP (umol P/g sed, total particulate phosphorus); TPP (%, total particulate phosphorus)

Individual Files: