Roca-Martí, Montserrat; Healey, Madeline; Kienast, Stephanie S (2025): Particulate Th-234, organic carbon, organic nitrogen and biogenic silica concentrations in size-fractionated particles in the Labrador Sea in spring 2022 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.983961
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Published: 2025-07-23 • DOI registered: 2025-08-21
Abstract:
Particulate Th-234, organic carbon (POC), organic nitrogen (PON) and biogenic silica (bSi) concentrations in size-fractionated particles in the Labrador Sea from 19 May to 2 June 2022 during the BELAS-1 expedition (CE22009, RV Celtic Explorer). Size-fractionated particles were collected using battery-powered in-situ large volume pumps (McLane Research Laboratories, Inc.) equipped with a three-tier 142-mm diameter filter holder (MULVFS style; Bishop et al., 2012; Lam et al., 2015). Pumps were deployed at depths between 50 and 500 m. The filter holders contained three filters: two Nitex screens (335 and 51 µm nominal pore size, acid-leached prior to the cruise) above a pre-combusted QMA filter (~1 µm nominal pore size, Graff et al., 2023) for size fractionation (1–51, 51–335 and >335 μm). Th-234 was measured using low-level Risø beta multicounters. POC and PON were analyzed using high-temperature combustion (Costech Instruments Elemental Combustion System 4010) after acid fumigation. bSi was analyzed following the NaOH digestion method (40 min at 95ºC) using a UV-Visible Spectrophotometer (Genesys 10S, Thermo Scientific).
Related to:
Roca-Martí, Montserrat; Healey, Madeline; McBride, Colleen E; Sipler, Rachel E; Devred, Emmanuel; Cisternas-Novoa, Carolina; Romanelli, Elisa; Ohashi, Kyoko; Kienast, Stephanie S (preprint): Sinking particle fluxes and biological carbon pump efficiency in the Labrador Sea during a Phaeocystis bloom decline. https://doi.org/10.5194/egusphere-2025-3671
Ward, Brian; Kienast, Stephanie S; cruise participants (2022): North-West Atlantic Biological Carbon Pump
(NWA-BCP) Cruise Report, May/June 2022,
R/V Celtic Explorer. nwa-bcp_cruise_report_CE22009.pdf
References:
Bishop, James K B; Lam, Phoebe J; Wood, Todd J (2012): Getting good particles: Accurate sampling of particles by large volume in-situ filtration. Limnology and Oceanography-Methods, 10(9), 681-710, https://doi.org/10.4319/lom.2012.10.681
Graff, Jason R; Nelson, Norman B; Roca-Martí, Montserrat; Romanelli, Elisa; Kramer, Sasha Jane; Erickson, Zachary K; Cetinić, Ivona; Buesseler, Ken O; Passow, Uta; Zhang, Xiaodong; Benitez-Nelson, Claudia R; Bisson, Kelsey; Close, Hilary G; Crockford, Taylor; Fox, James; Halewood, Stuart; Lam, Phoebe J; Roesler, Collin S; Sweet, Julia; VerWey, Brian; Xiong, Yuanheng; Siegel, David A (2023): Reconciliation of total particulate organic carbon and nitrogen measurements determined using contrasting methods in the North Pacific Ocean as part of the NASA EXPORTS field campaign. Elementa - Science of the Anthropocene, 11(1), 00112, https://doi.org/10.1525/elementa.2022.00112
Lam, Phoebe J; Ohnemus, Daniel C; Auro, Maureen E (2015): Size-fractionated major particle composition and concentrations from the US GEOTRACES North Atlantic Zonal Transect. Deep Sea Research Part II: Topical Studies in Oceanography, 116, 303-320, https://doi.org/10.1016/j.dsr2.2014.11.020
Funding:
Natural Sciences and Engineering Research Council (NSERC), grant/award no. NWA-BCP: The Northwest Atlantic Biological Carbon Pump
Coverage:
Median Latitude: 58.020878 * Median Longitude: -49.876275 * South-bound Latitude: 56.653300 * West-bound Longitude: -52.470100 * North-bound Latitude: 58.816700 * East-bound Longitude: -48.616000
Date/Time Start: 2022-05-18T05:13:00 * Date/Time End: 2022-05-30T14:50:00
Minimum DEPTH, water: 32.7 m * Maximum DEPTH, water: 486.3 m
Event(s):
CE22009_6_Day-LVP (LVP_cast_2) * Latitude: 58.816700 * Longitude: -49.443400 * Date/Time: 2022-05-21T09:03:00 * Location: Labrador Sea * Campaign: CE22009 (BELAS-1) * Basis: Celtic Explorer * Method/Device: In situ pump, McLane Research Laboratories, WTS-LV
CE22009_9_Day-LVP (LVP_cast_3) * Latitude: 58.650000 * Longitude: -49.360100 * Date/Time: 2022-05-22T16:17:00 * Location: Labrador Sea * Campaign: CE22009 (BELAS-1) * Basis: Celtic Explorer * Method/Device: In situ pump, McLane Research Laboratories, WTS-LV
CE22009_12_Day-LVP (LVP_cast_4) * Latitude: 58.483300 * Longitude: -49.110000 * Date/Time: 2022-05-25T17:05:00 * Location: Labrador Sea * Campaign: CE22009 (BELAS-1) * Basis: Celtic Explorer * Method/Device: In situ pump, McLane Research Laboratories, WTS-LV
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Kienast, Stephanie S | |||
| 2 | LATITUDE | Latitude | Kienast, Stephanie S | Geocode | ||
| 3 | LONGITUDE | Longitude | Kienast, Stephanie S | Geocode | ||
| 4 | DEPTH, water | Depth water | m | Kienast, Stephanie S | Geocode | |
| 5 | DATE/TIME | Date/Time | Kienast, Stephanie S | Geocode | ||
| 6 | Thorium-234, particulate | 234Th part | dpm/l | Kienast, Stephanie S | Low-level Risø beta multicounters | 1–51 µm |
| 7 | Thorium-234, particulate, standard deviation | 234Th part std dev | ± | Kienast, Stephanie S | Low-level Risø beta multicounters | 1–51 µm |
| 8 | Carbon, organic, particulate | POC | µmol/l | Kienast, Stephanie S | Elemental Analyser, COSTECH, ECS4010 | 1–51 µm |
| 9 | Carbon, organic, particulate, standard deviation | POC std dev | ± | Kienast, Stephanie S | Elemental Analyser, COSTECH, ECS4010 | 1–51 µm |
| 10 | Nitrogen, organic, particulate | PON | µmol/l | Kienast, Stephanie S | Elemental Analyser, COSTECH, ECS4010 | 1–51 µm |
| 11 | Nitrogen, organic, particulate, standard deviation | PON std dev | ± | Kienast, Stephanie S | Elemental Analyser, COSTECH, ECS4010 | 1–51 µm |
| 12 | Thorium-234, particulate | 234Th part | dpm/l | Kienast, Stephanie S | Low-level Risø beta multicounters | 51–335 µm |
| 13 | Thorium-234, particulate, standard deviation | 234Th part std dev | ± | Kienast, Stephanie S | Low-level Risø beta multicounters | 51–335 µm |
| 14 | Carbon, organic, particulate | POC | µmol/l | Kienast, Stephanie S | Elemental Analyser, COSTECH, ECS4010 | 51–335 µm |
| 15 | Carbon, organic, particulate, standard deviation | POC std dev | ± | Kienast, Stephanie S | Elemental Analyser, COSTECH, ECS4010 | 51–335 µm |
| 16 | Nitrogen, organic, particulate | PON | µmol/l | Kienast, Stephanie S | Elemental Analyser, COSTECH, ECS4010 | 51–335 µm |
| 17 | Nitrogen, organic, particulate, standard deviation | PON std dev | ± | Kienast, Stephanie S | Elemental Analyser, COSTECH, ECS4010 | 51–335 µm |
| 18 | Biogenic silica | bSiO2 | µmol/l | Kienast, Stephanie S | Spectrophotometer UV/VIS, Thermo Fisher Scientific, Genesys 10 | 51–335 µm |
| 19 | Biogenic silica, standard deviation | bSiO2 std dev | ± | Kienast, Stephanie S | Spectrophotometer UV/VIS, Thermo Fisher Scientific, Genesys 10 | 51–335 µm |
| 20 | Thorium-234, particulate | 234Th part | dpm/l | Kienast, Stephanie S | Low-level Risø beta multicounters | >335 µm |
| 21 | Thorium-234, particulate, standard deviation | 234Th part std dev | ± | Kienast, Stephanie S | Low-level Risø beta multicounters | >335 µm |
| 22 | Carbon, organic, particulate | POC | µmol/l | Kienast, Stephanie S | Elemental Analyser, COSTECH, ECS4010 | >335 µm |
| 23 | Carbon, organic, particulate, standard deviation | POC std dev | ± | Kienast, Stephanie S | Elemental Analyser, COSTECH, ECS4010 | >335 µm |
| 24 | Nitrogen, organic, particulate | PON | µmol/l | Kienast, Stephanie S | Elemental Analyser, COSTECH, ECS4010 | >335 µm |
| 25 | Nitrogen, organic, particulate, standard deviation | PON std dev | ± | Kienast, Stephanie S | Elemental Analyser, COSTECH, ECS4010 | >335 µm |
| 26 | Biogenic silica | bSiO2 | µmol/l | Kienast, Stephanie S | Spectrophotometer UV/VIS, Thermo Fisher Scientific, Genesys 10 | >335 µm |
| 27 | Biogenic silica, standard deviation | bSiO2 std dev | ± | Kienast, Stephanie S | Spectrophotometer UV/VIS, Thermo Fisher Scientific, Genesys 10 | >335 µm |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
704 data points