Conference Agenda
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Daily Overview |
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📌Poster Session and Networking Aperitivo 🍷 Location: Lower Lobby | |
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Integration of interferometric and polarimetric observables for permafrost characterization at P- and L-band 1: UiT The Arctic University of Norway, Norway; 2: Jet Propulsion Laboratory, California Institute of Technology; 3: NORCE Norwegian Research Centre AS Seasonal settlement of permafrost terrain reflects the thickness and ice content of the active layer. Such changes can be quantified through differential interferometric SAR (InSAR). Polarimetric SAR (PolSAR), in turn, is sensitive to scattering mechanisms related to vegetation structure, soil moisture, and dielectric contrast at the thaw front. Integrating these complementary observables provides a means to link subsurface processes with surface scattering behavior and to improve the physical interpretation of SAR backscatter in permafrost environments. In this work, we exploit long-wavelength airborne SAR data (P- and L-band) acquired during the NASA ABoVE campaign over the North Slope of Alaska. Three P-band acquisitions spanning the 2017 thaw season are used to estimate cumulative surface subsidence via InSAR, isolating the net seasonal deformation associated with active layer thaw. To complement the sparse temporal sampling of the airborne data, dense Sentinel-1 C-band interferograms (12-day repeat) are employed to track the temporal evolution of subsidence and to constrain the seasonal trajectory. In parallel, polarimetric parameters and decompositions derived from the L- and P-band datasets are used to map scattering mechanisms and land-cover classes, yielding proxies for soil and vegetation conditions that govern thaw settlement and drainage. By jointly analyzing the interferometric deformation observations and polarimetric indicators, we examine how scattering behavior varies with the magnitude and spatial pattern of subsidence across contrasting tundra types, including ice-rich polygonal terrain. The results demonstrate the potential of combined InSAR–PolSAR observations to link geophysical and electromagnetic properties of permafrost landscapes. This work anticipates the capabilities of the recently launched spaceborne missions such as NISAR (L-band) and BIOMASS (P-band), which will enable global, long-wavelength monitoring of permafrost thaw dynamics and related carbon–climate feedbacks. | |
