2020
DOI: 10.1109/jstars.2020.2966432
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Snow Property Controls on Modeled Ku-Band Altimeter Estimates of First-Year Sea Ice Thickness: Case Studies From the Canadian and Norwegian Arctic

Abstract: Uncertainty in snow properties impacts the accuracy of Arctic sea ice thickness estimates from radar altimetry. On firstyear sea ice (FYI), spatiotemporal variations in snow properties

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Cited by 25 publications
(44 citation statements)
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“…Kroisleitner et al, 2018), but usage of satellite altimetry in this context remains unexplored. Signal interaction with vegetation limits the applicability of Ku-and Ka-bands for soil observations regarding freeze and thaw status (Park et al, 2011) as well as surface height. Wider use of altimetry for snow and permafrost applications requires higher spatial resolution and temporal coverage than what is available to Figure 2.…”
Section: Snow On Land and Permafrostmentioning
confidence: 99%
“…Kroisleitner et al, 2018), but usage of satellite altimetry in this context remains unexplored. Signal interaction with vegetation limits the applicability of Ku-and Ka-bands for soil observations regarding freeze and thaw status (Park et al, 2011) as well as surface height. Wider use of altimetry for snow and permafrost applications requires higher spatial resolution and temporal coverage than what is available to Figure 2.…”
Section: Snow On Land and Permafrostmentioning
confidence: 99%
“…due to ice lenses/crusts), radar signals undergo absorption within the snow volume (e.g., Kwok and Maksym, 2014;Ricker et al, 2015). Recent studies suggest reduced signal penetration into the snow pack, with a more diffuse snow/sea ice interface, on both Arctic and Antarctic sea ice (Gerland et al, 2013;Kwok and Kacimi, 2018), especially if the snow pack is saline (Nandan et al, 2020;Nandan et al, 2017) or very deep with ice lenses present (King et al, 2018). In addition, deep snow pushes the ice surface below the water level, leading to negative freeboard and induces flooding and slushy, snow-ice formation in the basal layers of the snow pack, which, when measured with a radar altimeter system, can result in a dominant scattering horizon above the true snow/ice interface (Nandan et al, 2020), and hence an overestimation of ice freeboard and thus sea ice thickness, and an underestimate of total snow thickness.…”
Section: Discussionmentioning
confidence: 99%
“…On FYI, overlying snow also wicks brine upwards from the sea ice surface during freeze-up, producing saline snow layers, predominately observed in the bottom-most 0.06-0.08 m of the snow pack (Drinkwater and Crocker, 1988;Geldsetzer et al, 2009;Nandan et al, 2016Nandan et al, , 2017Nandan et al, , 2020. Sea ice salinity observations from the 1-m thick FYI floe, collected on 5 and 23…”
Section: Discussionmentioning
confidence: 99%
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