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- W2001196865 abstract "The rapidly changing sea ice regime in the Arctic has necessitated an evaluation of sea ice roughness at smaller scales than those provided by satellites. In this article, we evaluate sub-pixel (<5.4 km) sea ice roughness using AMSR-E brightness temperature (Tb) 89 GHz data and in situ physical roughness data acquired using a helicopter-based laser system in the southern Beaufort Sea during April–June of 2008. The analysis shows a statistically significant correlation (r2 = 0.61, P-value < 0.05, regression line slope = –79.93) of Tb at horizontal polarization (H-pol) decreasing with increasing root mean square (RMS) heights. These results suggest that 89 H-pol is more sensitive (than vertical polarization (V-pol)) to the changes in physical roughness. The temporal evolution in AMSR-E Tb values at 89 H-pol and 89 V-pol shows a decrease from April to June. We conclude that solely the AMSR-E Tb at 5.4 km is insufficient to fully account for the changes occurring in the dielectric properties and surface roughness of sea ice at sub-pixel level of 1–4 km during April–June." @default.
- W2001196865 created "2016-06-24" @default.
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- W2001196865 date "2015-02-01" @default.
- W2001196865 modified "2023-09-25" @default.
- W2001196865 title "Sub-pixel evaluation of sea ice roughness using AMSR-E data" @default.
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- W2001196865 doi "https://doi.org/10.1080/01431161.2014.1001081" @default.
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