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  • Observation  (2)
  • Arctic Ocean; Area/locality; ARK-XVI/2; around Svalbard; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Event label; Giant water sampler; GWS; Latitude of event; Longitude of event; Polarstern; PS57; PS57/173-1; PS57/173-3; PS57/197-1; PS57/264-2; PS57/264-3; SV00-1b; SV00-2a; SV00-4b; SV01-11b; SV01-1c; SV01-9b; SV02-MS1; Technetium-99; Technetium-99, standard deviation; Water sample; WS  (1)
  • 2010-2014  (3)
Document type
Keywords
  • Observation  (2)
  • Arctic Ocean; Area/locality; ARK-XVI/2; around Svalbard; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Event label; Giant water sampler; GWS; Latitude of event; Longitude of event; Polarstern; PS57; PS57/173-1; PS57/173-3; PS57/197-1; PS57/264-2; PS57/264-3; SV00-1b; SV00-2a; SV00-4b; SV01-11b; SV01-1c; SV01-9b; SV02-MS1; Technetium-99; Technetium-99, standard deviation; Water sample; WS  (1)
  • Arctic  (2)
  • Model  (2)
  • Freshwater  (1)
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Years
  • 2010-2014  (3)
Year
  • 1
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    Unknown
    Table 1: Technetium-99 in seawater in the West Spitsbergen Current and adjacent areas, sorted from east to west (2011)
    PANGAEA
    In:  Supplement to: Gerland, Sebastian; Lind, Bjørn; Dowdall, Mark; Karcher, Michael J; Kolstad, Anne Kathrine (2003): 99Tc in seawater in the West Spitsbergen Current and adjacent areas. Journal of Environmental Radioactivity, 69(1-2), 119-127, https://doi.org/10.1016/S0265-931X(03)00090-0
    Details
    Publication Date: 2023-10-28
    Description: 99Tc levels were measured in seawater samples collected between 2000 and 2002 in the West Spitsbergen Current (WSC) and along the western coast of Svalbard or Spitzbergen and compared with available oceanographic 3-D modelling results for the late 1990s. Additional data from related regions are also presented in order to support the data interpretation. The seawater in the Arctic fjord Kongsfjorden on the western coast of Svalbard is influenced by the WSC, as shown by the 99Tc levels in surface water. By means of the WSC, 99Tc reaches the Eastern Fram Strait, where one branch of the WSC turns west into the East Greenland Current (EGC), and another branch continues northwards into the Arctic Ocean. Surface seawater collected in the central part of the WSC during a cruise on board the R/V "Polarstern" in the summer of 2000, showed higher levels of 99Tc than samples measured in Kongsfjorden in the spring of 2000. However, all levels measured in surface water are of the same order of magnitude. Data from sampling of deeper water in the WSC and EGC provide information pertaining to the lateral distribution of 99Tc. In all vertical profiling surveys (conducted in spring and summer), the highest levels of 99Tc were found in surface water. Comparison with oceanographic 3-D modelling indicates both significant seasonal variations in the lateral stratification of the WSC and variations with depth over shorter vertical distances. This information can be applied in sampling strategies, environmental monitoring, long-range transport of pollutants and physical oceanography.
    Keywords: Arctic Ocean; Area/locality; ARK-XVI/2; around Svalbard; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Event label; Giant water sampler; GWS; Latitude of event; Longitude of event; Polarstern; PS57; PS57/173-1; PS57/173-3; PS57/197-1; PS57/264-2; PS57/264-3; SV00-1b; SV00-2a; SV00-4b; SV01-11b; SV01-1c; SV01-9b; SV02-MS1; Technetium-99; Technetium-99, standard deviation; Water sample; WS
    Type: Dataset
    Format: text/tab-separated-values, 48 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    An assessment of Arctic Ocean freshwater content changes from the 1990s to the 2006-2008 period (2011)
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © The Author(s), 2010. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Deep Sea Research Part I: Oceanographic Research Papers 58 (2011): 173-185, doi:10.1016/j.dsr.2010.12.002.
    Description: Unprecedented summer-season sampling of the Arctic Ocean during the period 2006−2008 makes possible a quasi-synoptic estimate of liquid freshwater (LFW) inventories in the Arctic Ocean basins. In comparison to observations from 1992−1999, LFW content relative to a salinity of 35 in the layer from the surface to the 34 isohaline increased by 8400 ± 2000 km3 in the Arctic Ocean (water depth greater than 500m). This is close to the annual export of freshwater (liquid and solid) from the Arctic Ocean reported in the literature. Observations and a model simulation show regional variations in LFW were both due to changes in the depth of the lower halocline, often forced by regional wind-induced Ekman pumping, and a mean freshening of the water column above this depth, associated with an increased net sea ice melt and advection of increased amounts of river water from the Siberian shelves. Over the whole Arctic Ocean, changes in the observed mean salinity above the 34 isohaline dominated estimated changes in LFW content; the contribution to LFW change by bounding isohaline depth changes was less than a quarter of the salinity contribution, and non-linear effects due to both factors were negligible.
    Description: This work was supported by the Co-Operative Project “The North Atlantic as Part of the Earth System: From System Comprehension to Analysis of Regional Impacts” funded by the German Federal Ministry for Education and Research (BMBF) and by the European Union Sixth Framework Programme project DAMOCLES (Developing Arctic Modelling and Observing Capabilities for Long-term Environment Studies), contract number 018509GOCE.
    Keywords: Arctic ; Freshwater ; Observation ; Model ; IPY ; Upper Ocean
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
    Format: application/pdf
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 3
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    Arctic Ocean basin liquid freshwater storage trend 1992–2012 (2014)
    John Wiley & Sons
    Details
    Publication Date: 2022-05-26
    Description: Author Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 41 (2014): 961-968, doi:10.1002/2013GL058121.
    Description: Freshwater in the Arctic Ocean plays an important role in the regional ocean circulation, sea ice, and global climate. From salinity observed by a variety of platforms, we are able, for the first time, to estimate a statistically reliable liquid freshwater trend from monthly gridded fields over all upper Arctic Ocean basins. From 1992 to 2012 this trend was 600±300 km3 yr−1. A numerical model agrees very well with the observed freshwater changes. A decrease in salinity made up about two thirds of the freshwater trend and a thickening of the upper layer up to one third. The Arctic Ocean Oscillation index, a measure for the regional wind stress curl, correlated well with our freshwater time series. No clear relation to Arctic Oscillation or Arctic Dipole indices could be found. Following other observational studies, an increased Bering Strait freshwater import to the Arctic Ocean, a decreased Davis Strait export, and enhanced net sea ice melt could have played an important role in the freshwater trend we observed.
    Description: This work was supported by the cooperative project 03F0605E, funded by the German Federal Ministry for Education and Research (BMBF), and by the European Union Sixth Framework Programme project DAMOCLES, contract 018509GOCE.
    Description: 2014-08-12
    Keywords: Arctic ; Liquid freshwater ; Observation ; Model
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
    Format: text/plain
    Location Call Number Limitation Availability
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    PAPER (OA)
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