Falkner, Kelly Kennison; Macdonald, Robie W; Carmack, Eddy C; Weingartner, T (1994): Barium in seawater and sediments from the Artic Ocean [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.734072, Supplement to: Falkner, KK et al. (1994): The potential of Barium as a tracer in Arctic water masses. In: Johannessen, O M; Muench, R D & Overland, J E (eds.), The polar oceans and their role in shaping the global environment. Geophysical Monograph Series, American Geophysical Union, 540 pages, ISBN 0-87590-042-9, 85, 63-76
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Abstract:
As part of ongoing circulation studies in the Arctic, seawater samples for dissolved Ba concentrations were obtained during Sep.-Oct., 1992 at several locations in the Bering Strait, Eastern Chukchi and Southern Beaufort Seas. The results reveal a dynamic rang (10 to 150 nmol/kg) for this element in the Arctic equal to or greater than that in combined Atlantic, Indian and Pacific oceans. Lowest levels are observed in surface waters, with values tending to decrease northwards in the direction of currents generally flowing frorn the Bering Strait along the Alaskan coast. Low surfacc concentrations tend to be accompanied by relatively enriched near bottom levels. On the basis of these spatial distributions, hydrographic observations and a knowledge of its behavior in other marine settings, it appears that Ba can be significantly depleted from surface waters as a result of the highly seasonal biological aclivities over Arctic marginal shelves. Removal at the surface is counteracted to some extent by regeneration at depth or in the sediments and by riverine inputs. The biologically related drawdown is likely to enhance the contrast between 'background' surface Ba levels in the Arctic and waters imprinted by regeneration and/or rivers, These preliminary findings suggest that Ba holds particular promise for tracing river waters and the ventilation of halodine waters hy laterally sinking brines produced during ice formation over the shelves.
Project(s):
Silicon Cycling in the World Ocean (SINOPS)
Funding:
Coverage:
Median Latitude: 71.488573 * Median Longitude: -153.884004 * South-bound Latitude: 68.933300 * West-bound Longitude: -169.683300 * North-bound Latitude: 72.526667 * East-bound Longitude: -143.865000
Date/Time Start: 1992-09-01T00:00:00 * Date/Time End: 1992-09-01T00:00:00
Event(s):
HX166-track * Latitude Start: 68.933300 * Longitude Start: -168.983300 * Latitude End: 71.200000 * Longitude End: -159.716700 * Method/Device: Underway cruise track measurements (CT)
IOS-A1 * Latitude: 72.526667 * Longitude: -143.865000 * Date/Time: 1992-09-01T00:00:00 * Elevation: -3375.0 m * Campaign: HL92-16 * Basis: Henry Larson * Method/Device: Bottle, Niskin (NIS) * Comment: Arctic Ocean Climate Station
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Falkner, KK; Macdonald, RW; Carmack, EC et al. (1994): (Table 1) Physical oceanography of cruise HX166. https://doi.org/10.1594/PANGAEA.55025
- Falkner, KK; Macdonald, RW; Carmack, EC et al. (1994): (Table 2) Nutrients measured on water bottle samples at station IOS-A1. https://doi.org/10.1594/PANGAEA.55024