Bam Wokil wokil.bam@usm.edu 0000-0002-7320-3496 University of Southern Mississippi https://ror.org/0270vfa57 2026 Particulate Thorium-234 activity along the equatorial Atlantic collected on RV METEOR during cruise M181 Cape Town - Mindelo, 2022-04-17 - 2022-05-27 dataset https://doi.org/10.1594/PANGAEA.990364 2026-02-11T17:13:34 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. Bam Wokil wokil.bam@usm.edu 0000-0002-7320-3496 Gasser Beat b.gasser@iaea.org Maiti Kanchan Levy Isabelle Miquel Juan Carlos J.C.Miquel@iaea.org Hansman Roberta L Scholten Jan Christoph jan.scholten@ifg.uni-kiel.de Xie Ruifang C 0000-0002-6628-9236 Sommer Stefan sommer@climate.unibe.ch Kiko Rainer rkiko@geomar.de 0000-0002-7851-9107 Swarzenski Peter W 0000-0003-0116-0578 2023 Particulate organic carbon export fluxes estimates by 234Th238U disequilibrium in the oxygen minimum zone off the Peruvian coast journal article Marine Chemistry 257 https://doi.org/10.1016/j.marchem.2023.104325 104325 Clevenger Samantha J Benitez-Nelson Claudia R 0000-0002-1004-5048 Roca-Martí Montserrat Montserrat.Roca.Marti@uab.cat 0000-0002-4719-9358 Bam Wokil wokil.bam@usm.edu 0000-0002-7320-3496 Estapa Margaret L Kenyon Jennifer A Pike Steven M Resplandy Laure 0000-0002-1212-3943 Wyatt Abigale M Buesseler Ken O kbuesseler@whoi.edu http://www.whoi.edu/science/MCG/people/kbuesseler/ 0000-0001-7362-8796 2024 Carbon and silica fluxes during a declining North Atlantic spring bloom as part of the EXPORTS program journal article Marine Chemistry 258 https://doi.org/10.1016/j.marchem.2023.104346 104346 -44.0070666666667 1.00043333333333 -0.00413333333333333 0.0079 -22.68264298245616 9.561403508771943E-4 2022-04-30T20:07:05 2022-05-20T07:37:27 10.0 500.0 GEOTRACES Global marine biogeochemical cycles of trace elements and their isotopes https://www.geotraces.org/ M181_78-1 5.0E-5 1.0 North Atlantic Ocean -4828.0 2022-04-30T19:23:42 M181 M181 TRATLEQ 2 TRATLEQ 2 Cape Town, South Africa 2022-04-17T00:00:00 2022-04-17 Mindelo, Cape Verde 2022-05-28T00:00:00 2022-05-28 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 Brandt, Peter Brandt, Peter doi:10.48433/cr_m181 20220015 https://maps.geomar.de/mapgen_ds/maps/legMap?lang=en&render=true&leg=M181 doi:10.1594/PANGAEA.948039 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 In situ pump ISP M181_104-1 -0.0054 -4.9955 South Atlantic Ocean -5156.0 2022-05-03T14:00:57 M181 M181 TRATLEQ 2 TRATLEQ 2 Cape Town, South Africa 2022-04-17T00:00:00 2022-04-17 Mindelo, Cape Verde 2022-05-28T00:00:00 2022-05-28 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 Brandt, Peter Brandt, Peter doi:10.48433/cr_m181 20220015 https://maps.geomar.de/mapgen_ds/maps/legMap?lang=en&render=true&leg=M181 doi:10.1594/PANGAEA.948039 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 In situ pump ISP M181_128-1 0.00272 -9.99955 North Atlantic Ocean -4770.0 2022-05-05T16:24:03 M181 M181 TRATLEQ 2 TRATLEQ 2 Cape Town, South Africa 2022-04-17T00:00:00 2022-04-17 Mindelo, Cape Verde 2022-05-28T00:00:00 2022-05-28 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 Brandt, Peter Brandt, Peter doi:10.48433/cr_m181 20220015 https://maps.geomar.de/mapgen_ds/maps/legMap?lang=en&render=true&leg=M181 doi:10.1594/PANGAEA.948039 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 In situ pump ISP M181_154-1 -8.0E-5 -14.9965 South Atlantic Ocean -3778.0 2022-05-07T12:21:55 M181 M181 TRATLEQ 2 TRATLEQ 2 Cape Town, South Africa 2022-04-17T00:00:00 2022-04-17 Mindelo, Cape Verde 2022-05-28T00:00:00 2022-05-28 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 Brandt, Peter Brandt, Peter doi:10.48433/cr_m181 20220015 https://maps.geomar.de/mapgen_ds/maps/legMap?lang=en&render=true&leg=M181 doi:10.1594/PANGAEA.948039 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 In situ pump ISP M181_186-1 0.00185 -19.99763 North Atlantic Ocean -2554.0 2022-05-09T17:32:54 M181 M181 TRATLEQ 2 TRATLEQ 2 Cape Town, South Africa 2022-04-17T00:00:00 2022-04-17 Mindelo, Cape Verde 2022-05-28T00:00:00 2022-05-28 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 Brandt, Peter Brandt, Peter doi:10.48433/cr_m181 20220015 https://maps.geomar.de/mapgen_ds/maps/legMap?lang=en&render=true&leg=M181 doi:10.1594/PANGAEA.948039 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 In situ pump ISP M181_215-1 -8.2E-4 -25.0002 South Atlantic Ocean -3208.0 2022-05-11T20:41:10 M181 M181 TRATLEQ 2 TRATLEQ 2 Cape Town, South Africa 2022-04-17T00:00:00 2022-04-17 Mindelo, Cape Verde 2022-05-28T00:00:00 2022-05-28 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 Brandt, Peter Brandt, Peter doi:10.48433/cr_m181 20220015 https://maps.geomar.de/mapgen_ds/maps/legMap?lang=en&render=true&leg=M181 doi:10.1594/PANGAEA.948039 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 In situ pump ISP M181_242-1 4.0E-4 -29.9959 North Atlantic Ocean -3790.0 2022-05-13T20:47:16 M181 M181 TRATLEQ 2 TRATLEQ 2 Cape Town, South Africa 2022-04-17T00:00:00 2022-04-17 Mindelo, Cape Verde 2022-05-28T00:00:00 2022-05-28 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 Brandt, Peter Brandt, Peter doi:10.48433/cr_m181 20220015 https://maps.geomar.de/mapgen_ds/maps/legMap?lang=en&render=true&leg=M181 doi:10.1594/PANGAEA.948039 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 In situ pump ISP M181_266-1 -3.8E-4 -34.9993 South Atlantic Ocean -4545.0 2022-05-16T00:42:43 M181 M181 TRATLEQ 2 TRATLEQ 2 Cape Town, South Africa 2022-04-17T00:00:00 2022-04-17 Mindelo, Cape Verde 2022-05-28T00:00:00 2022-05-28 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 Brandt, Peter Brandt, Peter doi:10.48433/cr_m181 20220015 https://maps.geomar.de/mapgen_ds/maps/legMap?lang=en&render=true&leg=M181 doi:10.1594/PANGAEA.948039 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 In situ pump ISP M181_289-1 4.2E-4 -40.00193 North Atlantic Ocean -3433.0 2022-05-18T06:57:59 M181 M181 TRATLEQ 2 TRATLEQ 2 Cape Town, South Africa 2022-04-17T00:00:00 2022-04-17 Mindelo, Cape Verde 2022-05-28T00:00:00 2022-05-28 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 Brandt, Peter Brandt, Peter doi:10.48433/cr_m181 20220015 https://maps.geomar.de/mapgen_ds/maps/legMap?lang=en&render=true&leg=M181 doi:10.1594/PANGAEA.948039 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 In situ pump ISP M181_308-1 0.00165 -44.0016 North Atlantic Ocean -3059.0 2022-05-20T07:05:20 M181 M181 TRATLEQ 2 TRATLEQ 2 Cape Town, South Africa 2022-04-17T00:00:00 2022-04-17 Mindelo, Cape Verde 2022-05-28T00:00:00 2022-05-28 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 Brandt, Peter Brandt, Peter doi:10.48433/cr_m181 20220015 https://maps.geomar.de/mapgen_ds/maps/legMap?lang=en&render=true&leg=M181 doi:10.1594/PANGAEA.948039 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 In situ pump ISP 285 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ LATITUDE Latitude http://en.wikipedia.org/wiki/ISO_6709 Bam Wokil wokil.bam@usm.edu 0000-0002-7320-3496 Latitude LONGITUDE Longitude http://en.wikipedia.org/wiki/ISO_6709 Bam Wokil wokil.bam@usm.edu 0000-0002-7320-3496 Longitude Event label Event Bam Wokil wokil.bam@usm.edu 0000-0002-7320-3496 Station Event (Station) DATE/TIME Date/Time http://en.wikipedia.org/wiki/ISO_8601 Time T http://dbpedia.org/resource/Time Bam Wokil wokil.bam@usm.edu 0000-0002-7320-3496 Collection Date Date/Time (Collection Date) Sample ID Sample ID Bam Wokil wokil.bam@usm.edu 0000-0002-7320-3496 Sample ID DEPTH, water Depth water m depth http://purl.obolibrary.org/obo/PATO_0001595 water http://purl.obolibrary.org/obo/CHEBI_15377 Length L http://dbpedia.org/resource/Length Bam Wokil wokil.bam@usm.edu 0000-0002-7320-3496 Depth water [m] Thorium-234, particulate 234Th part dpm/l particulate Anti-coincidence beta counters, Risø Laboratory Technical University of Denmark Riso anticoincidence beta GM counter series http://vocab.nerc.ac.uk/collection/L22/current/TOOL2024/ Bam Wokil wokil.bam@usm.edu 0000-0002-7320-3496 1-51 µm 234Th part [dpm/l] (1-51 µm) Thorium-234, particulate, error 234Th part e ± thorium-234 234Th particulate Anti-coincidence beta counters, Risø Laboratory Technical University of Denmark Riso anticoincidence beta GM counter series http://vocab.nerc.ac.uk/collection/L22/current/TOOL2024/ Bam Wokil wokil.bam@usm.edu 0000-0002-7320-3496 net error 1-51 µm 234Th part e [±] (net error 1-51 µm) Thorium-234, particulate 234Th part dpm/l particulate Anti-coincidence beta counters, Risø Laboratory Technical University of Denmark Riso anticoincidence beta GM counter series http://vocab.nerc.ac.uk/collection/L22/current/TOOL2024/ Bam Wokil wokil.bam@usm.edu 0000-0002-7320-3496 >51 µm 234Th part [dpm/l] (>51 µm) Thorium-234, particulate, error 234Th part e ± thorium-234 234Th particulate Anti-coincidence beta counters, Risø Laboratory Technical University of Denmark Riso anticoincidence beta GM counter series http://vocab.nerc.ac.uk/collection/L22/current/TOOL2024/ Bam Wokil wokil.bam@usm.edu 0000-0002-7320-3496 net error >51 µm 234Th part e [±] (net error >51 µm) CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels citable M181 Paritculate Thorium-234 TRATLEQ-II author10428 author114692 author114693 author114694 author22205 author25101 author25417 author30290 author35687 author42120 author43832 author465 author46831 author46832 author55353 author73946 author82513 author82514 author82516 author99590 basis2 campaign3375508 campaign48064 curlevel30 event3022159 event3022185 event3022209 event3022235 event3022267 event3022296 event3022323 event3022347 event3022370 event3022389 geocode1599 geocode1600 geocode1601 geocode1619 geocode8128 inst2554 journal10808 license21 method11179 method18700 param16065 param21539 param554255 pi99590 project4115 ref137694 ref137695 term1073131 term21434 term22475 term2606205 term30188 term3764520 term38338 term43863 term43975 term48942 term77120 term77121 term77122 term77150 term77543