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OAS accession Detail for 0278282
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| accessions_id: | 0278282 | archive |
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| Title: | Particulate trace element concentrations from NOAA Ship Ronald H. Brown CLIVAR A16N cruise in 2013 (NCEI Accession 0278282) |
| Abstract: | This dataset contains physical data collected on NOAA Ship Ronald H. Brown during cruise RB-13-04 from 2013-08-04 to 2013-09-29. These data include water pressure. The instruments used to collect these data include CTD profiler, GO-FLO Bottle, and X-ray fluorescence analyzer. These data were collected by Dr William M. Landing of Florida State University and Dr Joseph Resing of National Oceanic and Atmospheric Administration as part of the "Collaborative Research: Trace Metal Deposition And Cycling In The North Atlantic On The 2013 CLIVAR/Repeat Hydrography A16N Expedition (A16N Trace Metals)" project. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2019-04-03. The following is the text of the dataset description provided by BCO-DMO: A16N Particulate trace element concentrations Dataset Description: Particulate trace element concentrations along CLIVAR A16N in 2013. |
| Date received: | 20190403 |
| Start date: | 20130804 |
| End date: | 20130929 |
| Seanames: | |
| West boundary: | -31.0015 |
| East boundary: | -18.8726 |
| North boundary: | 63.71 |
| South boundary: | 3.1505 |
| Observation types: | physical |
| Instrument types: | bottle, CTD |
| Datatypes: | HYDROSTATIC PRESSURE |
| Submitter: | |
| Submitting institution: | Biological and Chemical Oceanography Data Management Office |
| Collecting institutions: | Florida State University, US DOC; National Oceanic and Atmospheric Administration |
| Contributing projects: | |
| Platforms: | Ronald H. Brown (33RO) |
| Number of observations: | |
| Supplementary information: | Acquisition Description: Seawater samples were collected from the surface ocean to depths of 750–1000 m, then sub-sampled for suspended particulate matter under trace-element-clean conditions (see Measures et al., 2008 for details). Briefly, suspended particulate matter samples were collected by pressurizing GO-FLO bottles with Particulate trace element concentrations were determined by energy-dispersive X-ray fluorescence (ED-XRF) using a thin film technique described by Feely et al. (1991). An optical subsample of each filter was analyzed on a Thermo Fisher Quant’X equipped with a Rhodium Target X-Ray tube and an electronically cooled, lithium-drifted solid state detector. X-rays for primary sample excitation were filtered for optimum control of peak-to-background ratios. Standards for calibration consisted of commercial thin film standards (MicroMatter), geochemical reference sample material MAG-1 (Gladney and Roelandts, 1988) finely ground and loaded onto polycarbonate filters (Feely et al., 1991), and a series of standards prepared using a modification of the method reported by Holynska and Bisiniek (1976) using sodium diethyldithiocarbamate (NaDDTC) to quantitatively precipitate trace metals from a solution of known concentration. These standards were prepared using a 1% NaDDTC solution that was added to trace metal solutions at pH 4 with a ligand-to-metal ratio of 4:1. The resulting precipitate was filtered over an acid-cleaned, 0.4 um polycarbonate Nuclepore filter. Procedural blanks were made by addition of a NaDDTC solution to a sample of acidified DI water followed by filtration. MicroMatter and MAG-1 standards were used to create individual standard curves for all elements; standard curves for Fe and Mn also included NaDDTC standards. Four different excitation conditions, all conducted under a vacuum atmosphere, were used for sample analysis and are detailed along with minimum determination limits (MDL) in Table 1. MDLs are defined as 3 times the square root of the background intensity measured from a standard of known concentration: MDL = ( 3 * √Ib)/(Ip/conc) where Ib is the background intensity, Ip is the peak intensity, and conc is the concentration of the standard. MicroMatter standards were used to calculate MDLs. |
| Availability date: | |
| Metadata version: | 2 |
| Keydate: | 2023-05-16 04:17:43+00 |
| Editdate: | 2023-06-25 18:00:58+00 |