Vincent Sasseville's research while affiliated with Centre D'Études Nordiques and other places

Publications (4)

Article
Full-text available
Soil emissivity of Arctic regions is a key parameter for assessing surface properties from microwave brightness temperature (Tb) measurements. Particularly in winter, frozen soil permittivity and roughness are two poorly characterized unknowns that must be considered. Here, we show that after removing snow, the 3D soil roughness can be accurately i...
Poster
Full-text available
1 Why Should we care about snow ? The lack of in-situ data in the Arctic and the problem about accessibility to these region constraints the traditional sampling over a year. While thermodynamic models such as CROCUS or SNOWPACK worked well in alpine area, they still need further calibrations for polar applications 1. 2 How to proceed? First snow c...

Citations

... (3b) and (4) in Vargel et al. (2020) with the improved Born approximation (IBA-Exp) configuration. Soil emission was simulated using the Wegmüller and Mätzler (1999) model with permittivity and roughness values from a field study of frozen soil emission based in CB (Meloche et al., 2020). The soil parameters from CB (Meloche et al., 2020) closely match values from a study in TVC (King et al., 2018) and were used for both site simulations. ...
... Measurements of the optical diameter and of the related metric called "specific surface area" defined as SSA = 6/ρ ice d opt , has become considerably easier in the recent decades, with a variety of available techniques based on adsorption of methane (Legagneux et al., 2002), high-resolution 3D images obtained by micro-computed tomography (Kerbrat et al., 2008), or optical reflectance Gallet et al., 2009;Matzl & Schneebeli, 2006;Painter et al., 2007). The latter is the most convenient technique in the field, and has enabled the collection of large data sets of SSA (Vargel et al., 2020). ...