O'Sullivan, Edel Mary; Steiner, Zvi (2025): Dissolved major element concentration data of the South Pacific Ocean transect during RV SONNE cruise SO289 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.977809 (DOI registration in progress)
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Published: 2025-03-24
Abstract:
This dataset presents salinity-normalized dissolved major element (Ca, Mg, K, Sr, Li) concentrations along RV SONNE cruise track SO289 in the South Pacific Ocean collected during GEOTRACES GP21 expedition (Valparaiso, Chile- Nouméa, New Caledonia) between February 23 and April 4, 2022. Samples were collected from the trace-metal clean Ti-frame rosette equipped with a Kevlar-coated winch. Samples were filtered through 0.2 µm AcroPak™ 500 filter capsules, collected in acid-cleaned 4 mL PP tubes, and acidified to pH ~2 with trace metal-grade HCl. Samples were analysed for Na, Ca, Mg, K, Li and Sr using a Varian-720 ES ICP-OES. Samples were diluted by a factor of 78-82 in 0.12 M HCl to the same final salinity. Multiple spectral lines were selected for each element, and samples were corrected for instrumental drift by sample-standard bracketing with IAPSO P157 diluted to the same final salinity. Calibration was performed on 7 dilutions of IAPSO P157. Element-to-sodium ratios were calculated for all combinations of spectral lines. Assuming a constant Na-to-salinity (PSU)=35 ratio, the element/Na ratios were multiplied by 0.46847 µmol kg-1 to obtain the salinity (PSU)-normalized element concentration, and by the ratio of practical to absolute salinity (TEOS-10). The TEOS-10 absolute salinities were calculated from EOS-80 values using the Gibb's Oceanographic Toolbox using the R package 'gsw' (v 1.1-1).
Project(s):
Funding:
Deutsche Forschungsgemeinschaft, Bonn (DFG), grant/award no. 458035111: Biogeochemistry of major elements in the Atlantic and Pacific Oceans
Coverage:
Median Latitude: -30.023119 * Median Longitude: -125.135319 * South-bound Latitude: -33.607600 * West-bound Longitude: 171.999048 * North-bound Latitude: -25.718100 * East-bound Longitude: -71.729163
Date/Time Start: 2022-02-23T16:40:00 * Date/Time End: 2022-04-03T21:10:00
Minimum DEPTH, water: 1.0 m * Maximum DEPTH, water: 6000.1 m
Event(s):
SO289_0_Underway-3 * Latitude Start: -33.603980 * Longitude Start: -71.732800 * Latitude End: -25.832970 * Longitude End: 171.998950 * Date/Time Start: 2022-02-23T17:39:00 * Date/Time End: 2022-04-03T21:10:00 * Elevation Start: -112.5 m * Elevation End: -3391.7 m * Location: South Pacific Ocean * Campaign: SO289 (GEOTRACES GP21) * Basis: Sonne_2 * Method/Device: Fish undulating, recording system tow (FISH) * Comment: Towed Trace Metal Clean Fish for trace metal analysis
SO289_1-1 * Latitude: -33.607580 * Longitude: -71.729170 * Date/Time: 2022-02-23T16:40:00 * Elevation: -110.5 m * Location: South Pacific Ocean * Campaign: SO289 (GEOTRACES GP21) * Basis: Sonne_2 * Method/Device: CTD/Rosette (CTD-RO) * Comment: CTD-TM
SO289_2-2 * Latitude: -33.090230 * Longitude: -71.825300 * Date/Time: 2022-02-23T22:21:00 * Elevation: -163.2 m * Location: South Pacific Ocean * Campaign: SO289 (GEOTRACES GP21) * Basis: Sonne_2 * Method/Device: CTD/Rosette (CTD-RO)
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
12149 data points
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