Abstract:

This dataset contains raw data of a moored sediment trap deployed aboard R/V Endeavor cruise in the northern Gulf of Mexico as part of a long-term time series to understand particle flux dynamics. This dataset includes the data from the first test deployment over a short 2-month time span, 2012-06-28 to 2012-09-08.

Suggested Citation:

Sweet, Julia. 2020. Raw data of a moored sediment trap deployed aboard R/V Endeavor cruise in the northern Gulf of Mexico from 2012-06-28 to 2012-09-08. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/n7-g0my-wr56

Purpose:

To understand the particle flux dynamics.

Data Parameters and Units:

Date filtered [DD-Mon-YY]; Filter cup [4 cups each upper and lower trap, 1-4]; Sample ID; Analysis type; Split fraction [the amount of the material that was analysed]; pH [pH of water in the cup]; Phosphate of water in the cup[uM]; Silicate of water in the cup [uM]; NOx [Nitrate/nitrite of water in the cup, uM]; Initial mass of filter for split [g/split]; Mass of the filter after filtration for split [g/split]; Mass of the filter after combustion for split [g/split]; PIC+POC C [Sample identification for analysis Particulate inorganic + organic carbon, ug C/split]; PIC+POC N [Particulate inorganic + organic nitrogen, µg N/split]; POC C [Sample identification for analysis Particulate organic carbon, µg C/split]; POC N [Particulate organic nitrogen, µg N/split]; Bsi [Biogenic silica, µmol Si/split]; Flag Comments. The mooring was deployed at OC26 site (28 degree 40.78 N and 88 degree 21.70 W; water depths of 1630 m) on 2012-06-26 from R/V Endeavor cruise EN510 and was recovered on R/V Endeavor cruise EN515 on 2012-09-09. The dataset also includes the cruise documentation for Endeavor cruise led by chief scientist Joseph Montoya. Please note that samples were split to 1/128 and then 6mL of subsample was filtered and analysed (6mL/69mL). Hence, the unusual splits.

Methods:

Detailed methods for trap deployment, sample processing and analytical methods are described by Giering et al. (2017). Supernatant water was analyzed as followed: Concentrations of NO3+NO2, PO4 and Si(OH)4 in the water overlaying the solid material were measured by simultaneous flow injection analysis (QuickChem 8000, Lachat Instruments). To calculate fluxes of a specific component x, use the formula: Flux=average(x/Split_fraction)/Deployment_time/Trap_Area.

Instruments:

Sediment trap: Parflux Mark78H-21 Splitter: WSD-10, McLane Flow injection analyzer: QuickCem 8000, Lachat Instrument Spectrophotometer: Genesys 10SVIS, Thermo Scientific CHN elemental analyzer: CEC44OHA, Exeter Analytical

Provenance and Historical References:

Giering, S.L.C., Yan, B., Sweet, J., Asper, V., Diercks, A., Chanton, J.P., Pitiranggon, M. and Passow, U., 2018. The ecosystem baseline for particle flux in the Northern Gulf of Mexico. Elem Sci Anth, 6(1), p.6. DOI: http://doi.org/10.1525/elementa.264

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