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      The anisotropic scattering coefficient of sea ice

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      General Information:

      Citation:
      Katlein, C. , Nicolaus, M. and Petrich, C. (2014): The anisotropic scattering coefficient of sea ice , Journal of Geophysical Research: Oceans . doi: 10.1002/2013JC009502
      Cite this page as:
      hdl:10013/epic.43128
      DOI:
      https://doi.org/10.1002/2013JC009502
      Official URL:
      http://onlinelibrary.wiley.com/doi/10.1002/2013JC009502/abstract;jsessionid=729AE23B01CFDDBD6CE798428CA2DDE1.f04t02
      Contact Email:
      Christian.Katlein@awi.de
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      Cite this document as:
      hdl:10013/epic.43128.d001
      Abstract:

      Radiative transfer in sea ice is subject to anisotropic, multiple scattering. The impact of anisotropy on the light field under sea ice was found to be substantial and has been quantified. In this study, a large data set of irradiance and radiance measurements under sea ice has been acquired with a Remotely Operated Vehicle (ROV) in the central Arctic. Measurements are interpreted in the context of numerical radiative transfer calculations, laboratory experiments, and microstructure analysis. The ratio of synchronous measurements of transmitted irradiance to radiance shows a clear deviation from an isotropic under-ice light field. We find that the angular radiance distribution under sea ice is more downward directed than expected for an isotropic light field. This effect can be attributed to the anisotropic scattering coefficient within sea ice. Assuming an isotropic radiance distribution under sea ice leads to significant errors in light-field modeling and the interpretation of radiation measurements. Quantification of the light field geometry is crucial for correct conversion of radiance data acquired by Autonomous Underwater Vehicles (AUVs) and ROVs.

      Further Details:

      Item Type:
      Article
      Authors:
      Katlein, Christian ; Nicolaus, Marcel ; Petrich, Chris
      Divisions:
      AWI Organizations > Climate Sciences > Sea Ice Physics
      AWI Organizations > Graduate Research Schools > POLMAR
      Primary Division:
      Organizations > AWI Organizations > Climate Sciences > Sea Ice Physics
      Programs:
      Helmholtz Research Programs > PACES II (2014-2018) > TOPIC 1: Changes and regional feedbacks in Arctic and Antarctic > WP 1.4: Arctic sea ice and its interaction with ocean and ecosystems
      Primary Topic:
      Helmholtz Programs > Helmholtz Research Programs > PACES II (2014-2018) > TOPIC 1: Changes and regional feedbacks in Arctic and Antarctic > WP 1.4: Arctic sea ice and its interaction with ocean and ecosystems
      Eprint ID:
      35032
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