de.pangaea.dataset990364 und dataset PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact 2026-04-29T18:20:35Z https://doi.pangaea.de/10.1594/PANGAEA.990364 <gco:CharacterString>Particulate Thorium-234 activity along the equatorial Atlantic collected on RV METEOR during cruise M181 Cape Town - Mindelo, 2022-04-17 - 2022-05-27</gco:CharacterString> 2026-02-11T17:13:34 publication https://doi.org/10.1594/PANGAEA.990364 Bam, Wokil
wokil.bam@usm.edu
https://orcid.org/0000-0002-7320-3496 information author PANGAEA
info@pangaea.de
https://www.pangaea.de/ information publisher tableDigital This dataset includes 234Th activity (dpm/L) measured in particulate samples across small (1-51 µm) and large (>51) size friction, which were sampled as a part of the TRATLEQ-II from April 17th to May 28, 2022, onboard the R/V Meteor (M181). During M181, 6 large volume insitu pumps (4 from McLane Research Laboratories and 2 from Challenger Oceanic) to sample 2 size classes of particles at 6 depths at a time. Sampling depths between the surface and 500 m were chosen such that the resulting profiles represent as well as possible the depth variability of the POC/234Th ratio. 4 pumps were deployed in the productive surface layer down to 150 m and 2 pumps below this depth. We obtained 10 pump profiles evenly distributed every 5° longitude between 1° East and 44° West. Each pump was equipped with two filters in sequence, a first prefilter made of Nitex tissue with a mesh size of 50µm to sample the large size settling particles, and a micro quartz filter (QMA, 1 μm nominal size) of 142 mm (McLane) and 293 mm (Challenger) diameter to sample the suspended small particles. The large particles collected on the prefilter were rinsed off with filtered (0.2 µm) seawater and filtered on a 25 mm QMA filter, and the small particles from the QMA filters were subsampled by punches, one on the 142 mm and 18 punches on the 293 mm filters. Punches and rinsed particles were mounted on sample holders for beta counting as was done for the 234Th precipitate. The International GEOTRACES protocol was followed for both sampling and analysis for particulate samples as explained in Bam et al. 2023 and Clevenger et al., 2024. completed Bam, Wokil
wokil.bam@usm.edu
https://orcid.org/0000-0002-7320-3496 information principalInvestigator M181 Paritculate Thorium-234 TRATLEQ-II theme <gco:CharacterString>PANGAEA Keyword List</gco:CharacterString> 1995-01-01 creation PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact GEOTRACES Global marine biogeochemical cycles of trace elements and their isotopes theme <gco:CharacterString>PANGAEA Project List</gco:CharacterString> 1995-01-01 creation PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact copyright restricted copyright CC-BY-4.0: Creative Commons Attribution 4.0 International (License comes into effect after moratorium ends) textTable und geoscientificInformation -44.0070666666667 1.00043333333333 -0.00413333333333333 0.0079 2022-04-30T20:07:05 2022-05-20T07:37:27 10.0 500.0 LATITUDE thematicClassification LONGITUDE thematicClassification Event label thematicClassification Station DATE/TIME thematicClassification Collection Date Sample ID thematicClassification DEPTH, water physicalMeasurement m m Thorium-234, particulate physicalMeasurement Anti-coincidence beta counters, Risø Laboratory; 1-51 µm dpm/l dpm/l Thorium-234, particulate, error physicalMeasurement Anti-coincidence beta counters, Risø Laboratory; net error 1-51 µm ± ± Thorium-234, particulate physicalMeasurement Anti-coincidence beta counters, Risø Laboratory; >51 µm dpm/l dpm/l Thorium-234, particulate, error physicalMeasurement Anti-coincidence beta counters, Risø Laboratory; net error >51 µm ± ± text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.990364?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: M181_78-1 * LATITUDE: 0.000050 * LONGITUDE: 1.000000 * DATE/TIME: 2022-04-30T19:23:42 * ELEVATION: -4828.0 m * LOCATION: North Atlantic Ocean * CAMPAIGN: M181 * BASIS: Meteor (1986) * METHOD/DEVICE: In situ pump 2022-04-30T19:23:42 EVENT LABEL: M181_104-1 * LATITUDE: -0.005400 * LONGITUDE: -4.995500 * DATE/TIME: 2022-05-03T14:00:57 * ELEVATION: -5156.0 m * LOCATION: South Atlantic Ocean * CAMPAIGN: M181 * BASIS: Meteor (1986) * METHOD/DEVICE: In situ pump 2022-05-03T14:00:57 EVENT LABEL: M181_128-1 * LATITUDE: 0.002720 * LONGITUDE: -9.999550 * DATE/TIME: 2022-05-05T16:24:03 * ELEVATION: -4770.0 m * LOCATION: North Atlantic Ocean * CAMPAIGN: M181 * BASIS: Meteor (1986) * METHOD/DEVICE: In situ pump 2022-05-05T16:24:03 EVENT LABEL: M181_154-1 * LATITUDE: -0.000080 * LONGITUDE: -14.996500 * DATE/TIME: 2022-05-07T12:21:55 * ELEVATION: -3778.0 m * LOCATION: South Atlantic Ocean * CAMPAIGN: M181 * BASIS: Meteor (1986) * METHOD/DEVICE: In situ pump 2022-05-07T12:21:55 EVENT LABEL: M181_186-1 * LATITUDE: 0.001850 * LONGITUDE: -19.997630 * DATE/TIME: 2022-05-09T17:32:54 * ELEVATION: -2554.0 m * LOCATION: North Atlantic Ocean * CAMPAIGN: M181 * BASIS: Meteor (1986) * METHOD/DEVICE: In situ pump 2022-05-09T17:32:54 EVENT LABEL: M181_215-1 * LATITUDE: -0.000820 * LONGITUDE: -25.000200 * DATE/TIME: 2022-05-11T20:41:10 * ELEVATION: -3208.0 m * LOCATION: South Atlantic Ocean * CAMPAIGN: M181 * BASIS: Meteor (1986) * METHOD/DEVICE: In situ pump 2022-05-11T20:41:10 EVENT LABEL: M181_242-1 * LATITUDE: 0.000400 * LONGITUDE: -29.995900 * DATE/TIME: 2022-05-13T20:47:16 * ELEVATION: -3790.0 m * LOCATION: North Atlantic Ocean * CAMPAIGN: M181 * BASIS: Meteor (1986) * METHOD/DEVICE: In situ pump 2022-05-13T20:47:16 EVENT LABEL: M181_266-1 * LATITUDE: -0.000380 * LONGITUDE: -34.999300 * DATE/TIME: 2022-05-16T00:42:43 * ELEVATION: -4545.0 m * LOCATION: South Atlantic Ocean * CAMPAIGN: M181 * BASIS: Meteor (1986) * METHOD/DEVICE: In situ pump 2022-05-16T00:42:43 EVENT LABEL: M181_289-1 * LATITUDE: 0.000420 * LONGITUDE: -40.001930 * DATE/TIME: 2022-05-18T06:57:59 * ELEVATION: -3433.0 m * LOCATION: North Atlantic Ocean * CAMPAIGN: M181 * BASIS: Meteor (1986) * METHOD/DEVICE: In situ pump 2022-05-18T06:57:59 EVENT LABEL: M181_308-1 * LATITUDE: 0.001650 * LONGITUDE: -44.001600 * DATE/TIME: 2022-05-20T07:05:20 * ELEVATION: -3059.0 m * LOCATION: North Atlantic Ocean * CAMPAIGN: M181 * BASIS: Meteor (1986) * METHOD/DEVICE: In situ pump 2022-05-20T07:05:20 References <gco:CharacterString>Particulate organic carbon export fluxes estimates by 234Th238U disequilibrium in the oxygen minimum zone off the Peruvian coast</gco:CharacterString> 2023-01-01 publication https://doi.org/10.1016/j.marchem.2023.104325 Bam, Wokil
wokil.bam@usm.edu
https://orcid.org/0000-0002-7320-3496 information author Gasser, Beat
b.gasser@iaea.org
author Maiti, Kanchan author Levy, Isabelle author Miquel, Juan Carlos
J.C.Miquel@iaea.org
author Hansman, Roberta L author Scholten, Jan Christoph
jan.scholten@ifg.uni-kiel.de
author Xie, Ruifang C https://orcid.org/0000-0002-6628-9236 information author Sommer, Stefan
sommer@climate.unibe.ch
author Kiko, Rainer
rkiko@geomar.de
https://orcid.org/0000-0002-7851-9107 information author Swarzenski, Peter W https://orcid.org/0000-0003-0116-0578 information author documentDigital Marine Chemistry 257 104325 References <gco:CharacterString>Carbon and silica fluxes during a declining North Atlantic spring bloom as part of the EXPORTS program</gco:CharacterString> 2024-01-01 publication https://doi.org/10.1016/j.marchem.2023.104346 Clevenger, Samantha J author Benitez-Nelson, Claudia R https://orcid.org/0000-0002-1004-5048 information author Roca-Martí, Montserrat
Montserrat.Roca.Marti@uab.cat
https://orcid.org/0000-0002-4719-9358 information author Bam, Wokil
wokil.bam@usm.edu
https://orcid.org/0000-0002-7320-3496 information author Estapa, Margaret L author Kenyon, Jennifer A author Pike, Steven M author Resplandy, Laure https://orcid.org/0000-0002-1212-3943 information author Wyatt, Abigale M author Buesseler, Ken O
kbuesseler@whoi.edu
https://orcid.org/0000-0001-7362-8796 information author documentDigital Marine Chemistry 258 104346