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Multi-angular thermal infrared emission characteristics of Bohai Sea ice based on in situ measurements

  • Jinlong Chao (a1), Chengyu Liu (a2), Yingjun Xu (a1), Wei Gu (a1), Ying Li (a1) and Feng Xie (a2)...

Abstract

We report on the radiative transfer process and optical properties of sea ice in the thermal infrared (TIR) band, presenting two new linear kernel driver models (Relative Emissivity Distribution Function, REDF) that describe TIR emission characteristics of smooth and rough ice. In order to test the models and determine the necessary coefficients, in situ measurements from the Bohai Sea were carried out during the 2011/12 and 2012/13 boreal winters. The results show that the relative emissivity of smooth sea ice decreases along with increasing viewing zenith angle, and the shape of the relative emissivity curve is similar to that of an ideal plane. Affected by parameters such as roughness and surface temperature distribution, the anisotropy of relative emissivity of sea ice with a high degree of roughness is stronger relative to the cosine emitter. The model coefficients were also obtained using a robust regression method based on the measured data. The presented models are more practical than the numerical radiative transfer model and can be used for multi-angular TIR remote sensing.

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Copyright

Corresponding author

Correspondence: Wei Gu <weigu@bnu.edu.cn>

References

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Keywords

Multi-angular thermal infrared emission characteristics of Bohai Sea ice based on in situ measurements

  • Jinlong Chao (a1), Chengyu Liu (a2), Yingjun Xu (a1), Wei Gu (a1), Ying Li (a1) and Feng Xie (a2)...

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