- 1School of Soil and Water Conservation, Beijing Forestry University, Beijing, China
- 2Key Laboratory for Polar Science of the MNR, Polar Research Institute of China, Shanghai, China
- 3School of Earth and Space Sciences, Peking University, Beijing, China
- 4The National Space Science Center, Chinese Academy of Sciences, Beijing, China
- 5German Aerospace Center DLR, Institute for Solar-Terrestrial Physics, Neustrelitz, Germany
- 6University of Bremen, Bremen, Germany
Global Navigation Satellite System Reflectometry (GNSS-R) has long been explored for retrieving sea ice properties, but in-situ validation in the central Arctic during the freezing season is rare, limiting its application. The primary objective of this study is to advance the current understanding of multi-polarization GNSS-R remote sensing for sea ice. This paper presents observations from the full-polarization GNSS-R(FpolGNSSR) prototype during the MOSAiC expedition. FpolGNSSR, with four polarization channels and high antenna gain (11.3 dB), aims to assess the impact of sea-ice thickness and permittivity on GNSS-R data, with observations from October 2019 to January 2020, the onset period of ice growth. A four-layer model simulates reflectivity, and the sensitivity of multi-polarization GNSS-R to sea ice is qualitatively analyzed. Subsequently, a simplified model reveals a linear relationship between reflectivity and ice thickness, with regression showing a correlation of 0.74 (P<0.01). The optimal RMSE of sea ice thickness retrieval is 0.13 m for first-year ice in freezing season (0.3–1.0 m thick).
How to cite: Liu, B., Lei, R., Wan, W., Xia, J., Semmling, M., Zhang, J., Xu, Y., Sun, Y., Spreen, G., and Spreen, G.: Polarimetric GNSS-Reflectometry data over sea ice during the MOSAiC expedition, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-10034, https://doi.org/10.5194/egusphere-egu25-10034, 2025.