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OAS accession Detail for 0277472
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| accessions_id: | 0277472 | archive |
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| Title: | Dissolved trace metal concentrations from a GO-FLO rosette collected during the R/V Thomas G. Thompson cruise TN303 from Peru to Tahiti in 2013 (U.S. GEOTRACES EPZT project) (NCEI Accession 0277472) |
| Abstract: | This dataset contains chemical and physical data collected on R/V Thomas G. Thompson during cruise TN303 in the South Pacific Ocean from 2013-10-28 to 2013-12-17. These data include depth and trace metal concentration. The instruments used to collect these data include Inductively Coupled Plasma Mass Spectrometer. These data were collected by Kenneth W. Bruland of University of California-Santa Cruz as part of the "GEOTRACES Pacific Section: Surface Sampling with the GeoFish and Dissolved Trace Metals on the Peru to East Pacific Rise Section (EPZT trace metals)" and "U.S. GEOTRACES East Pacific Zonal Transect (U.S. GEOTRACES EPZT)" projects and "U.S. GEOTRACES (U.S. GEOTRACES)" program. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2023-01-23. The following is the text of the dataset description provided by BCO-DMO: Dissolved trace metals from eastern part of the transect from GO-FLO rosette Dataset Description: Dissolved trace metals on the eastern half of the transect (plus a few other locations) in samples taken from the GEOTRACES GO-FLO rosette and filtered through a 0.2 um Acropak capsule filter. Revision history: 06 May 2016 - these data were updated with new values for some Copper samples. 06 June 2016 - revised again when joined to Master Event File and split into Bottle and Fish columns. 29 November 2016 - replaced values in Fe_D_CONC_BOTTLE column that were less than zero with "BDL" (below detection limit). The following are the negative values originally reported: GT sample 3560 -- Fe_D_CONC_BOTTLE = -0.05 GT sample 3812 -- Fe_D_CONC_BOTTLE = -0.02 GT sample 3913 -- Fe_D_CONC_BOTTLE = -0.07 GT sample 3998 -- Fe_D_CONC_BOTTLE = -0.02 |
| Date received: | 20230123 |
| Start date: | 20131028 |
| End date: | 20131217 |
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| West boundary: | -152.079 |
| East boundary: | -77.376 |
| North boundary: | -10.224 |
| South boundary: | -16.001 |
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| Submitting institution: | Biological and Chemical Oceanography Data Management Office |
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| Supplementary information: | Acquisition Description: Sampling: Sample bottles were Low Density Polyethylene (LDPE) bottles and cleaned in accordance with the GEOTRACES cookbook ( http://www.geotraces.org/images/stories/documents/intercalibration/Cookbook.pdf ). Sample bottles were stored in weak (~0.1 N) HNO 3 , and were emptied before shipping. Samples were collected using the U.S. GEOTRACES sampling system of 24 Teflon-coated GO-FLO bottles (Cutter and Bruland, 2012). At each station, the bottles were deployed open and tripped on ascent at 3 m/min. GO-FLOs were sampled in the GEOTRACES trace metal clean sampling van that contained HEPA-filtered air. During sampling, the GO-FLO bottles were pressurized to ~0.4 atm with HEPA-filtered air, and their spigots were fitted with an acid-cleaned piece of Bev-a-Line tubing that fed into an Acropak-200 Supor capsule filter (0.2 µm pore size made of polyethersulfone). Before use, this filter had been filled with filtered surface seawater that had been acidifed to pH 2 with trace metal clean HCl and left overnight to rinse. Before collecting any subsamples, at least 500mL of seawater was passed through the filter (while eliminating air bubbles in the capsule reservoir). Sample bottles were rinsed three times with 10% sample volume before filling. Acropak filters were used for at most 3 casts before a new filter was used, and they were stored empty in a refrigerator while not in use. GEOFish surface samples were taken using an all-plastic "towed fish" pumping system as described in Bruland et al . 2005 at approximately 3 m depth and were similarly filtered and sampled. Samples were acidified at sea with the equivalent of 4mL quartz-distilled 6M HCl per liter of seawater (resulting in pH 1.7-1.8). Samples were sitting acidified for several months before analysis back in the laboratory. |
| Availability date: | |
| Metadata version: | 1 |
| Keydate: | 2023-04-04 05:38:47+00 |
| Editdate: | 2023-04-04 05:39:59+00 |