Abstract:

This dataset contains chemical data collected on land by rivers (Mississippi River, Mobile River, Pearl River, Pascagoula River, Jourdan River, Wolf River) influencing the Mississippi Bight during the CONCORDE study period from October 2015 to June 2016. The dataset includes tracers such as nutrients, oxygen and hydrogen isotopic composition of the water, selected trace elements (molybdenum and cesium), and radium isotopes including the date and location (name of river, longitude and latitude) of the sampling collection site. This data will be used to constrain chemical inputs to the Mississippi Bight study area and also will provide reference data for the CONCORDE synthesis model.

Suggested Citation:

Shiller, Alan M.; Box, Hannah; Gilbert, Melissa; Joung, DongJoo; Sanial, Virginie. 2019. Chemical data for rivers influencing the Mississippi Bight from 2015-10-01 to 2016-06-08. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/n7-sps7-rq23

Publications:

Sanial, V., Shiller, A., Joung, D. J., & Ho, P. (2019). Extent of Mississippi River water in the Mississippi Bight and Louisiana Shelf based on water isotopes. Estuarine, Coastal and Shelf Science. doi:10.1016/j.ecss.2019.04.030

Parra, S. M., Sanial, V., Boyette, A. D., Cambazoglu, M. K., Soto, I. M., Greer, A. T., … Dinniman, M. S. (2020). Bonnet Carré Spillway freshwater transport and corresponding biochemical properties in the Mississippi Bight. Continental Shelf Research, 199, 104114. doi:10.1016/j.csr.2020.104114

Purpose:

Investigation of water chemistry, biology, and circulation in the Mississippi Bight. All CONCORDE cruises were designed to provide observational (physical, chemical, biological) data on the Bight for use in a synthetic model describing oil exposure potential. This specific sampling was land-based river sampling of those rivers in Mississippi, Alabama, and Louisiana significantly influencing the Mississippi Bight.

Data Parameters and Units:

River [Mississippi, Mobile, Pearl, Pascagoula, Jourdan, Wolf, East Pearl]; Date [mm/dd/yyyy]; Latitude [°N, decimal degrees]; Longitude [°E, decimal degrees]; Temperature [degree C]; NO~3~ + NO~2~ [µmol/kg]; PO~4~ [µmol/kg]; NO^2-^ [µmol/kg]; NH4^+^ [µmol/kg]; Si(OH)4 [µmol/kg]; TDN [Total dissolved nitrogen, µmol/kg]; Ba, diss [nmol/Kg]; δ18O (water) [‰ VSMOW], δD (water) [‰ VSMOW]; Mo, diss [nmol/kg]; Cs, diss [nmol/kg]; Ra223 [dpm/100L]; Ra224 [dpm/100L]; Ra226 [dpm/100L]; Ra228 [dpm/100L]. Note: N/A = not applicable, bdl = below detection limit.

Methods:

Information on the analytical procedures pertinent to this dataset can be found in the multiple publications as mentioned below: For dissolved Si analysis - Please refer to Brzezinski et al., 1995 For dissolved Mo analysis - Please refer to Ho et al., 2018 For dissolved Ba analysis - Please refer to Joung and Shiller, 2014 For dissolved radium analysis - Please refer to Keep L. et al., 2018 For dissolved inorganic N and P analysis - Please refer to Maclntyre et al., 2011 For water isotope analysis - Please refer to Sanial et al., 2019 For dissolved Mo and Cs analysis - Please refer to Shim et al., 2012 For Total Dissolved Nitrogen (TDN) analysis - Please refer to Solorzano and Sharp, 1980

Instruments:

ThermoFisher-Element XR, High resolution inductively coupled plasma-mass spectrometer Picarro L2120-Cavity ring-down spectrometer Radium Delayed Coincidence Counter (RaDeCC) system for short-lived radium isotopes Gamma counter (well-type, germanium) Skalar autoanalyzer

Provenance and Historical References:

Brzezinski, M. A., & Nelson, D. M. (1995). The annual silica cycle in the Sargasso Sea near Bermuda. Deep Sea Research Part I: Oceanographic Research Papers, 42(7), 1215–1237. doi:10.1016/0967-0637(95)93592-3 Ho, P., Lee, J.-M., Heller, M. I., Lam, P. J., & Shiller, A. M. (2018). The distribution of dissolved and particulate Mo and V along the U.S. GEOTRACES East Pacific Zonal Transect (GP16): The roles of oxides and biogenic particles in their distributions in the oxygen deficient zone and the hydrothermal plume. Marine Chemistry, 201, 242–255. doi:10.1016/j.marchem.2017.12.003 Joung, D., & Shiller, A. M. (2014). Dissolved barium behavior in Louisiana Shelf waters affected by the Mississippi/Atchafalaya River mixing zone. Geochimica et Cosmochimica Acta, 141, 303–313. doi:10.1016/j.gca.2014.06.021 Kipp, L. E., Sanial, V., Henderson, P. B., van Beek, P., Reyss, J.-L., Hammond, D. E., … Charette, M. A. (2018). Radium isotopes as tracers of hydrothermal inputs and neutrally buoyant plume dynamics in the deep ocean. Marine Chemistry, 201, 51–65. doi:10.1016/j.marchem.2017.06.011 Macintyre, H. L., Stutes, A. L., Smith, W. L., Dorsey, C. P., Abraham, A., & Dickey, R. W. (2010). Environmental correlates of community composition and toxicity during a bloom of Pseudo-nitzschia spp. in the northern Gulf of Mexico. Journal of Plankton Research, 33(2), 273–295. doi:10.1093/plankt/fbq146 Sanial, V., Shiller, A., Joung, D. J., & Ho, P. (2019). Extent of Mississippi River water in the Mississippi Bight and Louisiana Shelf based on water isotopes. Estuarine, Coastal and Shelf Science. doi:10.1016/j.ecss.2019.04.030 Shim, M.-J., Swarzenski, P. W., & Shiller, A. M. (2012). Dissolved and colloidal trace elements in the Mississippi River delta outflow after Hurricanes Katrina and Rita. Continental Shelf Research, 42, 1–9. doi:10.1016/j.csr.2012.03.007 Solórzano, L., & Sharp, J. H. (1980). Determination of total dissolved nitrogen in natural waters1. Limnology and Oceanography, 25(4), 751–754. doi:10.4319/lo.1980.25.4.0751

Individual Files: