Rutgers van der Loeff, Michiel M; Stimac, Ingrid; Bauch, Dorothea; Valk, Ole; Geibert, Walter; Vieira, Lucia Helena (2021): Radium isotopes and 228Th in water column samples collected on POLARSTERN expedition PS94 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.936050
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Abstract:
Radium isotopes are produced by decay of an isotope of thorium, a highly particle reactive element. Radium is relatively soluble in seawater such that once a thorium isotope in suspended or bottom sediments decays, a fraction of the produced radium isotope may be released to solution. 224Ra (3.7-day half-life) and 223Ra (11.4-day half-life) are used extensively as tracers for interaction on the shelf and for submarine groundwater discharge (SGD). 228Ra is strongly enriched in shelf waters and in the Transpolar Drift (TPD) and its half-life (5.8 years) is well suited to study the fate of this shelf-derived water in the central Arctic. This dataset collected in the framework of GEOTRACES during PS94 in 2015 shows that the input of 228Ra in the TPD has increased since previous studies in 2007 and 2011. The distribution of 228Ra-daughter 228Th (1.9 y half-life) and the 228Th/228Ra ratio are measured to trace particle fluxes. The accumulation of 226Ra (1620 y half-life) in the deep Makarov Basin can be used as a measure of basin ventilation time.
Related to:
Rutgers van der Loeff, Michiel M; Kipp, Lauren; Charette, Matthew A; Moore, Willard S; Black, Erin; Stimac, Ingrid; Charkin, Alexander N; Bauch, Dorothea; Valk, Ole; Karcher, Michael J; Krumpen, Thomas; Casacuberta Arola, Núria; Smethie, William M jr; Rember, Robert (2018): Radium isotopes across the Arctic Ocean show time scales of water mass ventilation and increasing shelf inputs. Journal of Geophysical Research: Oceans, 123(7), 4853-4873, https://doi.org/10.1029/2018JC013888
Project(s):
Coverage:
Median Latitude: 83.019641 * Median Longitude: 102.570967 * South-bound Latitude: 71.000000 * West-bound Longitude: 21.200000 * North-bound Latitude: 89.930000 * East-bound Longitude: -116.830000
Date/Time Start: 2015-08-20T00:00:00 * Date/Time End: 2015-10-09T00:00:00
Minimum DEPTH, water: 10 m * Maximum DEPTH, water: 4180 m
Event(s):
PS94/004-4 * Latitude: 79.249500 * Longitude: 30.036170 * Date/Time: 2015-08-20T03:52:00 * Elevation: -227.2 m * Location: Barents Sea * Campaign: PS94 (ARK-XXIX/3) * Basis: Polarstern * Method/Device: In situ pump (ISP)
PS94/032-8 * Latitude Start: 81.847170 * Longitude Start: 30.851500 * Latitude End: 81.856330 * Longitude End: 30.917170 * Date/Time Start: 2015-08-22T22:06:00 * Date/Time End: 2015-08-23T03:01:00 * Elevation Start: -3168.5 m * Elevation End: -3162.2 m * Location: Arctic Ocean * Campaign: PS94 (ARK-XXIX/3) * Basis: Polarstern * Method/Device: In situ pump (ISP)
PS94/050-5 * Latitude: 84.383670 * Longitude: 30.230000 * Date/Time: 2015-08-26T17:23:00 * Elevation: -4055.7 m * Location: Arctic Ocean * Campaign: PS94 (ARK-XXIX/3) * Basis: Polarstern * Method/Device: In situ pump (ISP)
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1501 data points