Laglera, Luis Miguel; Sukekava, Camila Fiaux; Middag, Rob; Gerringa, Loes; Slagter, Hans A; Zitoun, Rebecca; Liao, Wen-Hsuan; Rijkenberg, Micha J A (2025): The concentration of humic substances and their contribution to iron speciation in waters of the Atlantic sector of the Arctic Ocean and the North Atlantic Ocean [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.968899 (DOI registration in progress)
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Published: 2025-04-08
Abstract:
In this dataset, we present findings on concentrations (< 0.2 μm) of humic substances, dissolved iron, and humic iron (the fraction of dissolved iron complexed by humic substances) in samples gathered during three distinct cruises across the North Atlantic and Arctic oceans. Our objective was to track the migration of humic substances originating from Siberian river outflows, as they traverse from surface waters of the Arctic Ocean into the North Atlantic Ocean, and to understand their impact on dissolved iron transport in the region. The dataset encompasses results from three cruises: the TransArcII expedition aboard the RV Polarstern (PS94) in the central basins and Atlantic sector of the Arctic Ocean, the GN05 expedition (PS100) in waters of the Fram Strait, and the Metalgate expedition aboard the RV Pelagia (64PE474) in waters surrounding Iceland. Dissolved iron concentrations were determined using ICP-MS (Middag et al. 2023), while humic substances and iron bound to humic substances were measured via Adsorptive Cathodic Stripping Voltammetry following the method outlined by Sukekava et al. (2018). Our findings reveal significant regional variations in the role of humic substances, influencing the prevention of dissolved iron precipitation and facilitating its transport.
Middag, R., R. Zitoun, and T. Conway, Trace Metals, in Marine Analytical Chemistry, J. Blasco and A. Tovar-Sánchez, Editors. 2023, Springer International Publishing: Cham. p. 103-198.
Sukekava, C., et al., Determination of the contribution of humic substances to iron complexation in seawater by catalytic cathodic stripping voltammetry. Talanta, 2018. 189: p. 359-364.
Related to:
Ardiningsih, Indah; Krisch, Stephan; Lodeiro, Pablo Fernandez; Reichart, Gert-Jan; Achterberg, Eric Pieter; Gledhill, Martha; Middag, Rob; Gerringa, Loes J A (2020): Natural Fe-binding organic ligands in Fram Strait and over the northeast Greenland shelf. Marine Chemistry, 224, 103815, https://doi.org/10.1016/j.marchem.2020.103815
Krisch, Stephan; Hopwood, Mark James; Roig, Stéphane; Gerringa, Loes J A; Middag, Rob; Rutgers van der Loeff, Michiel M; Petrova, Mariia V; Lodeiro, Pablo Fernandez; Colombo, Manuel; Cullen, Jay T; Jackson, Sarah L; Heimbürger-Boavida, Lars-Eric; Achterberg, Eric Pieter (2022): Arctic – Atlantic exchange of the dissolved micronutrients Iron, Manganese, Cobalt, Nickel, Copper and Zinc with a focus on Fram Strait. Global Biogeochemical Cycles, https://doi.org/10.1029/2021GB007191
Laglera, Luis Miguel; Sukekava, Camila Fiaux; Slagter, Hans A; Downes, Javier; Aparicio-Gonzalez, Alberto; Gerringa, Loes J A (2019): First Quantification of the Controlling Role of Humic Substances in the Transport of Iron Across the Surface of the Arctic Ocean. Environmental Science & Technology, 53(22), 13136-13145, https://doi.org/10.1021/acs.est.9b04240
Rijkenberg, Micha J A; Slagter, Hans A; Rutgers van der Loeff, Michiel M; van Ooijen, Jan C; Gerringa, Loes J A (2018): Dissolved Fe in the Deep and Upper Arctic Ocean With a Focus on Fe Limitation in the Nansen Basin. Frontiers in Marine Science, 5, https://doi.org/10.3389/fmars.2018.00088
Funding:
Dutch Research Council (NWO), grant/award no. 016.Vidi.189.138: Trace metals and the Arctic-Atlantic gateway in a changing world, local processes and global connections
Spanish Inter-Ministerial Science and Technology Commission (CICYT), grant/award no. PID2020-115291GB-I00: HUFENAO
Coverage:
Median Latitude: 74.512037 * Median Longitude: -1.814198 * South-bound Latitude: 60.000000 * West-bound Longitude: -155.800000 * North-bound Latitude: 89.900000 * East-bound Longitude: 167.000000
Date/Time Start: 2015-08-20T00:00:00 * Date/Time End: 2021-08-14T00:00:00
Minimum DEPTH, water: 2.00 m * Maximum DEPTH, water: 3121.10 m
Event(s):
64PE474_6 * Latitude: 60.000000 * Longitude: -40.200000 * Date/Time: 2021-07-23T00:00:00 * Elevation: -2463.5 m * Campaign: 64PE474 * Basis: Pelagia * Method/Device: CTD/Rosette, ultra clean (CTD-UC)
64PE474_8 * Latitude: 63.200000 * Longitude: -37.000000 * Date/Time: 2021-07-25T00:00:00 * Elevation: -2120.1 m * Campaign: 64PE474 * Basis: Pelagia * Method/Device: CTD/Rosette, ultra clean (CTD-UC)
64PE474_13 * Latitude: 65.700000 * Longitude: -28.500000 * Date/Time: 2021-07-29T00:00:00 * Elevation: -1019.2 m * Campaign: 64PE474 * Basis: Pelagia * Method/Device: CTD/Rosette, ultra clean (CTD-UC)
Comment:
<0.01 means below limit of detection
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Cruise/expedition | Expedition | ||||
| 3 | DATE/TIME | Date/Time | Geocode | |||
| 4 | LATITUDE | Latitude | Geocode | |||
| 5 | LONGITUDE | Longitude | Geocode | |||
| 6 | DEPTH, water | Depth water | m | Geocode | ||
| 7 | Depth, bathymetric | Bathy depth | m | |||
| 8 | Sample code/label | Sample label | sample Bottle | |||
| 9 | Humic substances | Humics | µg SRFA/l | Voltammetry | total | |
| 10 | Standard deviation | Std dev | ± | Voltammetry | humic substances | |
| 11 | Iron | Fe | nmol/l | Voltammetry | Iron Binding Capacity of Humic Substances | |
| 12 | Iron | Fe | nmol/l | Voltammetry | Iron complexed with HS | |
| 13 | Iron, dissolved | Fe diss | nmol/l | ICP-MS | ||
| 14 | Iron | Fe | % | %Fe bound with Humic substances |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
2882 data points
Download Data
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