Scattering optics of snow

Area of Science:

• Earth Science
• Atmospheric Science
• Optical Physics

Background:

• Snow cover is crucial for the hydrological cycle and planetary albedo regulation.
• Snow's spectral albedo is influenced by grain microstructure, age, temperature, and pollutants.
• Understanding snow's optical properties is vital for climate and heating regime studies.

Purpose of the Study:

• To theoretically investigate snow's spectral albedo and bidirectional reflectance.
• To analyze the impact of nonspherical grain shapes and packing effects on snow reflectance.
• To explore how grain size and pollutants affect the transition from reflective to absorptive snow.

Main Methods:

• Theoretical modeling of snow's spectral albedo and bidirectional reflectance.
• Investigation of nonspherical grain shapes and close-packed effects.
• Analysis of visible and near-infrared electromagnetic spectrum interactions with snow.

Main Results:

• Nonspherical grain shape and packing significantly influence snow reflectance.
• Snow grain size and pollutant load dictate the spectral transition from high albedo to absorption.
• Snow's optical properties are sensitive to its physical characteristics and impurity content.

Conclusions:

• Snow's spectral albedo is a complex property influenced by microstructural and chemical factors.
• Satellite-based spectrometers and radiometers can monitor snow characteristics and impurity concentrations globally.
• This research provides insights for remote sensing of snow cover and its environmental impact.