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Sea ice draft measured by upward looking sonar at mooring site AWI206-6

Publication Date
DOI: 10.1594/pangaea.821253
  • Ant-Xxiv/3
  • Awi206-6
  • Calculated
  • Draft
  • Mooring (Long Time)
  • Polarstern
  • Pressure
  • Water
  • Ps71
  • Temperature
  • Water
  • Temperature Recorder
  • Tilt Angle
  • Two Way Travel Time
  • Upward Looking Sonar (Uls)
  • Validation Flag/Comment
  • Weddell Sea


Earth Syst. Sci. Data, 5, 209–226, 2013 doi:10.5194/essd-5-209-2013 © Author(s) 2013. CC Attribution 3.0 License. History of Geo- and Space SciencesOpe n A cc es s Advances in Science & Research Open Access Proceedings O pe n A cc es s Earth System Science Data Open A cc es s Earth System Science Data D iscu ssio n s Drinking Water Engineering and Science Open Access Drinking Water Engineering and Science DiscussionsOp en A cc es s Social Geography O p en A cc es s D iscu ssio n s Social Geography O p en A cc es s CMYK RGB Sea ice draft in the Weddell Sea, measured by upward looking sonars A. Behrendt, W. Dierking, E. Fahrbach, and H. Witte Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany Correspondence to: A. Behrendt ([email protected]) Received: 25 July 2012 – Published in Earth Syst. Sci. Data Discuss.: 17 August 2012 Revised: 2 May 2013 – Accepted: 8 May 2013 – Published: 25 June 2013 Abstract. The presented database contains time-referenced sea ice draft values from upward looking sonar (ULS) measurements in the Weddell Sea, Antarctica. The sea ice draft data can be used to infer the thickness of the ice. They were collected during the period 1990–2008. In total, the database includes measurements from 13 locations in the Weddell Sea and was generated from more than 3.7 million measurements of sea ice draft. The files contain uncorrected raw drafts, corrected drafts and the basic parameters measured by the ULS. The measurement principle, the data processing procedure and the quality control are described in detail. To account for the unknown speed of sound in the water column above the ULS, two correction methods were applied to the draft data. The first method is based on defining a reference level from the identification of open water leads. The second method uses a model of sound speed in the oceanic

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