Calculation of the emissivity of a layered snow cover by the quasistatic method and by the radiation transfer equation method

The Influence of Stratigraphy On Microwave Radiation From Natural Snow Cover

“…Note that despite the lack of a general theory, some models of emissivity of dry snow cover demonstrate agreement with experimental data 1267 [13,14]. However, those models do not encompass the whole variety of states of the snow medium.…”

“…The use of snow characteristics averaged over the whole thickness, as noted in [15], can lead to wrong interpretation of data of remote sensing. In this sense, electrodynamics models of dry snow cover suggested in [9,13,14] and considering its structural and stratigraphic properties, are more accurate. Papers [9,14] studied the influence of ice grains size distribution on radiation characteristics of snow cover.…”

“…In this sense, electrodynamics models of dry snow cover suggested in [9,13,14] and considering its structural and stratigraphic properties, are more accurate. Papers [9,14] studied the influence of ice grains size distribution on radiation characteristics of snow cover. Analysis of the results achieved in those works indicate that the snow radiobrightness temperature TB strongly depends on its statistical properties, namely the mean size and the dispersion of sizes of ice grains.…”

“…Authors of [9,14] point out, that snow cover emissivity calculated with grains size distribution taken into account, greatly differs from the one obtained with such distribution neglected. The significant growth of radiobrightness temperature at the frequencies f > 15 GHz caused by the distribution of grain sizes, reflects, according to [9,14], the fact that as the dispersion increases, the contribution to absorption on account of small particles increases, while big grains produce no remarkable effect, since their albedo approaches its limit.…”

“…The significant growth of radiobrightness temperature at the frequencies f > 15 GHz caused by the distribution of grain sizes, reflects, according to [9,14], the fact that as the dispersion increases, the contribution to absorption on account of small particles increases, while big grains produce no remarkable effect, since their albedo approaches its limit.…”