Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Zheng, Linjie; Minami, Tomoharu; Takano, Shotaro; Sohrin, Yoshiki (2023): Seawater analysis from cruise KH-14-6 in the western South Pacific Ocean along the GEOTRACES transect GP19 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.956224

Always quote citation above when using data! You can download the citation in several formats below.

Published: 2023-03-08 • DOI registered: 2024-05-31

RIS CitationBibTeX Citation Copy Citation ShareShow MapGoogle Earth 33 5 8

Abstract:
This data contains the basic hydrological parameters, including temperature, salinity, potential density anomaly, potential temperature, dissolved oxygen, silicate, nitrate, phosphate, and chlorophyll-a concentrations, dissolved (d) Cd, dNi, dZn, dCu, dFe and labile particulate (lp) Fe concentrations in the western South Pacific Ocean along the GEOTRACES transect GP19 (~170°W, 64°S - equator).
Seawater samples were collected using a clean CTD (Conductivity, Temperature, and Depth) sampling system with Niskin-X bottles during the Japanese GEOTRACES cruise KH-14-6 onboard the research vessel Hakuho Maru from December 2, 2014 to February 26, 2015. Filtered samples for the determination of dissolved trace metals (dMs) were passed through an AcroPak cartridge filter with a 0.8/0.2 µm pore size (Pall Life Sciences) and were transferred to 250-mL low-density polyethylene (LDPE) bottles (Nalgene). Samples for the determination of total dissolvable trace metals (tdMs) were not filtered. The seawater samples were acidified to pH ~2 with ultrapure HCl (Tamapure AA-10, Tama Chemicals) immediately after collection and were stored at room temperature in the laboratory for several years until analysis. An offline automated solid-phase extraction system (SPE-100, Hiranuma Sangyo) equipped with a column of Nobias Chelate-PA1 resin (Hitachi High-Technologies) was used to preconcentrate the trace metals (Al, Mn, Fe, Co, Ni, Cu, Zn, Cd, and Pb) in seawater (Minami et al., 2015; doi:10.1016/j.aca.2014.11.016). Unfiltered samples were first passed through a 0.45-µm pore size Millex syringe filter (Merck Millipore) and then introduced into the SPE-100 system. The labile particulate metal (lpMs) concentrations were calculated as the difference between tdMs and dMs.
Trace metal concentrations were determined using a high-resolution inductively coupled plasma mass spectrometer (HR-ICP-MS, Element 2, Thermo Fisher Scientific) using the calibration curve method. Temperature was measured using a CTD sensor. Salinity was determined using a bench salinometer that was standardized based on the IAPSO standard seawater, and the oxygen content was measured using the Winkler method. Nutrient concentrations were determined by spectrophotometry using an automated analyzer onboard the vessel. Chlorophyll a (Chl. a) was collected on a 25-mm Whatman GF/F glass fiber filter and measured by fluorometry. Samples were collected using a clean CTD (Conductivity, Temperature, and Depth) sampling system with Niskin-X bottles (Sohrin and Bruland, 2011). Filtered samples for dMs determination were passed through an AcroPak cartridge filter with a 0.8/0.2-µm pore size (Pall Life Sciences) by the pressure of compressed air and were transferred to 250-mL low-density polyethylene (LDPE) bottles (Nalgene). Samples for tdMs determination were not filtered and were transferred from Niskin-X bottles to 250-mL LDPE bottles using a silicon tube. Filtered and unfiltered samples were placed in a cleanroom (Class 100) and acidified with 20% HCl (Tamapure AA-10, Tama Chemicals, Japan) to a pH of 1.9–2.0 within 24 h of sample collection.
Keyword(s):
dCd concentration; dCu concentration; dFe concentration; dNi concentration; dZn concentration; GEOTRACES; labile particulate Fe concentration; scavenging; supply from the Fiji basins; the western South Pacific Ocean
Supplement to:
Zheng, Linjie; Minami, Tomoharu; Takano, Shotaro; Sohrin, Yoshiki (2024): Distributions of cadmium, nickel, zinc, copper, and iron in the western South Pacific Ocean: Local sources of the nutrient-type trace metals. Marine Chemistry, 104411, https://doi.org/10.1016/j.marchem.2024.104411
Project(s):
Global marine biogeochemical cycles of trace elements and their isotopes (GEOTRACES)
JSPS KAKENHI (KAKENHI)
Coverage:
Median Latitude: -29.915889 * Median Longitude: -172.976444 * South-bound Latitude: -64.001000 * West-bound Longitude: 172.497000 * North-bound Latitude: 0.003000 * East-bound Longitude: -169.000000
Date/Time Start: 2014-12-15T12:00:00 * Date/Time End: 2015-02-06T00:00:20
Minimum DEPTH, water: 0 m * Maximum DEPTH, water: 5650 m
Event(s):
KH-14-6_GR04_B * Latitude: -5.000000 * Longitude: 172.497000 * Date/Time: 2014-12-15T12:00:00 * Elevation: -4320.0 m * Location: South Pacific Ocean * Method/Device: CTD
KH-14-6_GR05_B * Latitude: -16.987000 * Longitude: 173.917000 * Date/Time: 2014-12-17T12:00:00 * Elevation: -1974.0 m * Location: South Pacific Ocean * Method/Device: CTD
KH-14-6_GR06_B * Latitude: -30.003000 * Longitude: 174.003000 * Date/Time: 2014-12-20T12:00:00 * Elevation: -3281.0 m * Location: South Pacific Ocean * Method/Device: CTD
Comment:
# in oxygen, nutrients, salinity and temperature = quality/questionable values
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventZheng, Linjie
2Date/Time of eventDate/TimeZheng, Linjie
3Latitude of eventLatitudeZheng, Linjie
4Longitude of eventLongitudeZheng, Linjie
5Elevation of eventElevationmZheng, Linjie
6Cruise/expeditionExpeditionZheng, Linjie
7Station labelStationZheng, Linjie
8TypeTypeZheng, Linjie
9DEPTH, waterDepth watermZheng, LinjieCTDGeocode
10Temperature, waterTemp°CZheng, LinjieCTD
11SalinitySalZheng, LinjieSalinometer (SALINO)
12Density, potential anomalyDens pot anomalykg/m3Zheng, Linjie
13Temperature, water, potentialTpot°CZheng, Linjie
14OxygenO2µmol/kgZheng, LinjieTitration, Winkler
15SiliconSiµmol/kgZheng, LinjieSpectrophotometer (SPEC)
16Nitrate[NO3]-µmol/kgZheng, LinjieSpectrophotometer (SPEC)
17Nitrite[NO2]-µmol/kgZheng, LinjieSpectrophotometer (SPEC)
18Phosphate[PO4]3-µmol/kgZheng, LinjieSpectrophotometer (SPEC)
19Chlorophyll aChl aµg/kgZheng, LinjieGF/F WHA1825047, Whatman, UK
20pHpHZheng, LinjieCTD
21Alkalinity, totalATµmol/kgZheng, LinjieCTD
22Iron, dissolved, totalFe diss totnmol/kgZheng, LinjieHR-ICP-MS, Thermo Finnigan Element 2td (tdMs): total dissolvable (td) trace metals, measured from unfiltered seawater samples.
23Iron, dissolvedFe dissnmol/kgZheng, LinjieHR-ICP-MS, Thermo Finnigan Element 2d (dMs): dissolved (d) trace metals, measured from filtered seawater samples.
24Iron, labile particulateFe lab partnmol/kgZheng, LinjieHR-ICP-MS, Thermo Finnigan Element 2lp (lpMs): labile particulate (lp) trace metals, calculated as the difference between tdMs and dMs.
25Nickel, dissolved, totalNi diss totnmol/kgZheng, LinjieHR-ICP-MS, Thermo Finnigan Element 2td (tdMs): total dissolvable (td) trace metals, measured from unfiltered seawater samples.
26Nickel, dissolvedNi dissnmol/kgZheng, LinjieHR-ICP-MS, Thermo Finnigan Element 2d (dMs): dissolved (d) trace metals, measured from filtered seawater samples.
27Copper, dissolved, totalCu diss totnmol/kgZheng, LinjieHR-ICP-MS, Thermo Finnigan Element 2td (tdMs): total dissolvable (td) trace metals, measured from unfiltered seawater samples.
28Copper, dissolvedCu dissnmol/kgZheng, LinjieHR-ICP-MS, Thermo Finnigan Element 2d (dMs): dissolved (d) trace metals, measured from filtered seawater samples.
29Copper, labile particulateCu lab partnmol/kgZheng, LinjieHR-ICP-MS, Thermo Finnigan Element 2lp (lpMs): labile particulate (lp) trace metals, calculated as the difference between tdMs and dMs.
30Zinc, dissolved, totalZn diss totnmol/kgZheng, LinjieHR-ICP-MS, Thermo Finnigan Element 2td (tdMs): total dissolvable (td) trace metals, measured from unfiltered seawater samples.
31Zinc, dissolvedZn dissnmol/kgZheng, LinjieHR-ICP-MS, Thermo Finnigan Element 2d (dMs): dissolved (d) trace metals, measured from filtered seawater samples.
32Zinc, labile particulateZn lab partnmol/kgZheng, LinjieHR-ICP-MS, Thermo Finnigan Element 2lp (lpMs): labile particulate (lp) trace metals, calculated as the difference between tdMs and dMs.
33Cadmium, dissolved, totalCd diss totnmol/kgZheng, LinjieHR-ICP-MS, Thermo Finnigan Element 2td (tdMs): total dissolvable (td) trace metals, measured from unfiltered seawater samples.
34Cadmium, dissolvedCd dissnmol/kgZheng, LinjieHR-ICP-MS, Thermo Finnigan Element 2d (dMs): dissolved (d) trace metals, measured from filtered seawater samples.
35Cadmium, labile particulateCd lab partnmol/kgZheng, LinjieHR-ICP-MS, Thermo Finnigan Element 2lp (lpMs): labile particulate (lp) trace metals, calculated as the difference between tdMs and dMs.
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
9572 data points

Download Data

Download dataset as tab-delimited text — use the following character encoding:

View dataset as HTML (shows only first 2000 rows)