Chemical analysis of sediment core pore water from the Shinnecock Bay tidal flat in February of 2019 (NCEI Accession 0291523)

This dataset contains chemical and physical data collected in the New York Bight and North Atlantic Ocean on 2019-02-20. These data include Aluminum, Iron, Manganese, and total alkalinity (TA). The instruments used to collect these data include Automatic titrator, Inductively Coupled Plasma Mass Spectrometer, and microplate. These data were collected by Laura Wehrmann, Nils Volkenborn, and Robert Aller of Stony Brook University as part of the "Iron cycling in bioturbated sediments - Fluxes, diagenetic redistribution, and isotopic signatures (Fe flux)" project. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2022-04-07.

The following is the text of the dataset description provided by BCO-DMO:

Acquisition Description:
Sediment cores were collected by hand from a bioturbated tidal flat at low tide using clear core tubes. These were sealed at the bottom with rubber stoppers. Overlying water was kept on top and the cores were immediately transported into the lab in buckets. In the lab, pore-water samples were collected using Rhizon samples (Seeberg-Elverfeldt et al., 2015) through pre-drilled holes in the core tubes. Samples were collected in sterile plastic syringes and immediately distributed into different vials for sample preservation. All samples were stored in the fridge. Samples for trace metal analysis were preserved by addition of nitric acid (2% v/v).

Alkalinity was determined spectrophotometrically following the method by Sarazin et al. (1999) using a Spectrostar Nano or Polarstar Omega plate reader (BMG Labtech). Cl- was determined by potentiometric titration with Ag+ using a Radiometer CMT-10 titrator. Iron, manganese and aluminum were determined by Inductively Coupled Plasma Mass Spectrometry (ICP-MS; Thermo-Finnegan Element 2) following a 1:100 dilution of the samples with In-115, Y-89 and Fe-57 as internal standards. CRM-TMDW-A and in-house standards were used as external reference standards for the ICP-MS analysis.