Here, we study melting glacier surface albedo using satellite hyperspectral imagery from the Environmental Mapping and Analysis Program (EnMAP). The proposed broadband albedo (BBA) retrieval algorithm is based on radiative transfer theory and includes atmospheric and topography corrections. The comparison with ground and other satellite snow and ice albedo products is presented. Ways to improve current satellite snow and ice albedo retrieval algorithms are discussed. While the EnMAP-derived BBA is highly correlated with BBA retrieved from other spaceborne instrumentation and algorithms, the various modern snow and ice satellite BBA products can differ by more than 5–10% for snow and, especially, bare ice. Bare ice optical heterogeneity is high from variable roughness conditions and impurity content. Bare ice BBA uncertainties exceed requirements needed for highly accurate assessment of glacier climatic effects.
Snow and ice albedo feedback (SIAF) is a key process linking cryospheric changes to global warming. Satellite radiative kernels provide another choice for estimating radiative feedbacks, bypassing the complexity of climate model radiative transfer processes. Based on the established method for estimating SIAF, we use t...
The limited evaluation of remote sensing Thermal InfraRed (TIR) products over snow-covered surfaces compromises their exploitation in cryospheric sciences. This study assesses for the first time the accuracy of high-resolution Land Surface Temperature (LST) products from Landsat 8, Landsat 9, and ECOSTRESS in a snow-co...
Sara Arioli, Picard Picard, S. Gascoin et al.· Recent Advances in Remote Se...· 0 citations
Snow on lake ice is highly heterogeneous, which influences ice formation and growth as snow acts as an effective thermal insulator. Despite its significance, spatially resolved snow depth measurements remain challenging, as existing methods are typically limited to point observations. This study presents a multi-sensor...
Alicia F. Pouw, Alex Maclean, Homa Kheyrollah Pour· Arctic Science· 0 citations
Accurate characterization of surface ultraviolet (UV) irradiance is important for many applications but remains challenging in mountainous terrain where atmospheric and surface heterogeneity introduce significant uncertainty. Radiative transfer (RT) models provide physically rigorous simulations but are limited to the...
Nethaneel R. A. Taylor, Richard Medina-Calderon, R. Fitzgerald· Atmosphere· 0 citations
Polar clouds play a crucial role in Arctic amplification and the surface radiation budget in a warming climate. However, accurate retrievals of cloud optical thickness (COT) and cloud effective radius (CER) over polar regions remain challenging because snow and ice surfaces have high and variable reflectance, solar-vie...
Ran-Hui Xu, Chao Liu, Di Di et al.· IEEE Journal of Selected Top...· 0 citations
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