O'Sullivan, Edel Mary; Steiner, Zvi: Dissolved major element concentration data of the Southern Ocean transect from the OISO-31/SWINGS cruise MD229 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.988111 (dataset in review)
Abstract:
This dataset presents salinity-normalized dissolved major element (Ca, Mg, K, Sr, Li) concentrations in the Indian Ocean Sector of the Southern Ocean collected on board the N/O Marion-Dufresne during the MD229 expedition (OISO-31/SWINGS cruise,La Réunion to La Réunion, January 11th - March 8th 2021). Samples were collected using Go-Flo bottles loaded onto a Trace Metal Clean Rosette (TMR, General Oceanics Inc. Model 1018 Intelligent Rosette), attached to a 6 mm Kevlar line. Samples were filtered using a 0.45 µm polyethersulfone filter (Supor®) and collected in 15mL LDPE bottles. All samples were acidified within 24 h of collection with ultrapure hydrochloric acid (HCl, Merck, 0.2%, final pH 1.7).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).
Funding:
Coverage:
Median Latitude: -58.657471 * Median Longitude: -50.435168 * South-bound Latitude: -81.924000 * West-bound Longitude: -57.690000 * North-bound Latitude: -31.785000 * East-bound Longitude: -30.106000
Date/Time Start: 2021-01-15T06:30:00 * Date/Time End: 2021-02-27T06:41:00
Minimum DEPTH, water: 1.0 m * Maximum DEPTH, water: 4559.6 m
Event(s):
MD229_FISH * Latitude: -50.982000 * Longitude: 25.005000 * Date/Time: 2021-01-15T06:30:00 * Campaign: MD229 (OISO/SWINGS) * Basis: Marion Dufresne (1972) * Method/Device: Fish undulating, recording system tow (FISH)
SWG_05_018 * Latitude: -30.106000 * Longitude: 31.785000 * Date/Time: 2021-01-20T22:41:00 * Campaign: MD229 (OISO/SWINGS) * Basis: Marion Dufresne (1972) * Method/Device: CTD/Rosette (CTD-RO)
SWG_11_034 * Latitude: -39.827000 * Longitude: 36.452000 * Date/Time: 2021-01-25T15:15:00 * Campaign: MD229 (OISO/SWINGS) * Basis: Marion Dufresne (1972) * 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:
1667 data points