Valk, Ole; Rutgers van der Loeff, Michiel M; Geibert, Walter; Gdaniec, Sandra; Moran, S Bradley; Lepore, Kate; Edwards, R Lawrence; Lu, Y; Puigcorbé, Viena; Casacuberta, Nuria; Paffrath, Ronja; Smethie, William; Roy-Barman, Matthieu (2019): Thorium isotopes in the water column in Amundsen Basin during POLARSTERN cruises PS70 (ARK-XXII/2) in 2007 and PS94 (ARK-XXIX/3) in 2015 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.908068
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Abstract:
In this study we present dissolved ²³⁰Th and ²³²Th results, as well as amount of particulate ²³⁴Th from total ²³⁴Th. The data, obtained as part of the GEOTRACES central Arctic Ocean sections GN04 (2015) and IPY11 (2007). Samples were analyzed following GEOTRACES methods, and compared to previous results from 1991. We observe significant decreases in ²³⁰Th concentrations in the intermediate waters of the Amundsen Basin. This removal was explained by scavenging removal of dissolved ²³⁰Th on the Barents Sea Shelf and along Atlantic water inflow pathways. This finding shows that a far-field decrease of dissolved ²³⁰Th can be caused by changes in scavenging on inflow passages and highlights the importance of repeated GEOTRACES sections.
Related to:
Valk, Ole; Rutgers van der Loeff, Michiel M; Geibert, Walter (2018): Thorium isotopes in the water column in Nansen Basin during POLARSTERN cruises PS70 (ARK-XXII/2) in 2007 and PS94 (ARK-XXIX/3) in 2015. PANGAEA, https://doi.org/10.1594/PANGAEA.893871
Valk, Ole; Rutgers van der Loeff, Michiel M; Geibert, Walter; Gdaniec, Sandra; Moran, S Bradley; Lepore, Kate; Edwards, R Lawrence; Lu, Y; Puigcorbé, Viena; Casacuberta, Nuria; Paffrath, Ronja; Smethie, William; Roy-Barman, Matthieu (2019): Circulation changes in the Amundsen Basin from 1991 to 2015 revealed from distributions of dissolved 230Th. Ocean Science Discussions, 1-27, https://doi.org/10.5194/os-2019-49
Valk, Ole; Rutgers van der Loeff, Michiel M; Geibert, Walter; Gdaniec, Sandra; Moran, S Bradley; Lepore, Kate; Edwards, R Lawrence; Lu, Y; Puigcorbé, Viena; Casacuberta, Nuria; Paffrath, Ronja; Smethie, William; Roy-Barman, Matthieu (2020): Decrease in 230Th in the Amundsen Basin since 2007: far-field effect of increased scavenging on the shelf? Ocean Science, 16(1), 221-234, https://doi.org/10.5194/os-16-221-2020
Project(s):
Marine Geochemistry @ AWI (AWI_MarGeoChem)
Coverage:
Median Latitude: 84.730906 * Median Longitude: 116.205288 * South-bound Latitude: 77.366300 * West-bound Longitude: 61.725000 * North-bound Latitude: 89.014830 * East-bound Longitude: 139.978670
Date/Time Start: 2007-08-28T05:06:00 * Date/Time End: 2015-09-22T18:53:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
3 datasets
Download Data
Datasets listed in this publication series
- Valk, O; Rutgers van der Loeff, MM; Geibert, W et al. (2019): Dissolved thorium 230 and particulate thorium 232 in the water column at stations PS70/309-5 and PS70/400-2. https://doi.org/10.1594/PANGAEA.908066
- Valk, O; Rutgers van der Loeff, MM; Geibert, W et al. (2019): Fraction of particulate thorium 234 in total thorium 234 in the water column at stations PS94/081-9, PS94/117-7 and PS94/125-8. https://doi.org/10.1594/PANGAEA.908067
- Valk, O; Rutgers van der Loeff, MM; Geibert, W et al. (2019): Dissolved thorium 230 and particulate thorium 232 in the water column at stations PS94/125-2 and PS94/125-5. https://doi.org/10.1594/PANGAEA.908065