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  • Kirsten Shultz
    Alfred-Wegener-Institute for Polar and Marine Research, Helgoland
  • Stefan Buttner
    Christian-Albrechts-University Kiel
  • Andreas Rogge
    Physiologisches Institut, Christian-Albrechts-Universität, 24118 Kiel, Germany.Alfred-Wegener-Institute for Polar and Marine Research, Helgoland
  • M.A. Janout
    Alfred-Wegener-Institute for Polar and Marine Research, Helgoland
  • J. Holemann
    Alfred-Wegener-Institute for Polar and Marine Research, Helgoland
  • Tom Rippeth
Intermediate nepheloid layers (INLs) form important pathways for the cross-slope transport and subsequent vertical export of particulate matter, including carbon. While intermediate maxima in particle settling fluxes have been reported in the Eurasian Basin of the Arctic Ocean, direct observations of turbid INLs above the surrounding continental slope are still lacking. In this study, we provide the first direct evidence of a turbid INL, coinciding with enhanced mid-water turbulent dissipation rates, based on data from the Laptev Sea continental slope in summer 2018. Prior to the INL observation, co-located long-term current velocity data show a period of intensified down-slope flow and isopycnal depression, which might have caused the enhanced mid-water turbulence via the generation of an unsteady lee wave. Similar periods of intensified down-slope flow were observed mostly in the ice-free season, suggesting an intensification of cross-slope particle transport in the future. The presented evidence for the existence of turbid INLs above
28 the Laptev Sea slope and their generation mechanism provide new insights into the im29
portant particle transport dynamics in this rapidly changing environment.
Iaith wreiddiolSaesneg
Rhif yr erthygle2021GL092988
CyfnodolynGeophysical Research Letters
Dyddiad ar-lein cynnar26 Ebr 2021
StatwsCyhoeddwyd - 16 Mai 2021

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