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Variations of the snow physical parameters and their effects on albedo in Sapporo, Japan

  • Teruo Aoki (a1), Hiroki Motoyoshi (a2), Yuji Kodama (a3), Teppei J. Yasunari (a3) and Konosuke Sugiura (a4)...
Abstract

Continuous measurements of the radiation budget and meteorological components, along with frequent snow-pit work, were performed in Sapporo, Hokkaido, Japan, during two winters from 2003 to 2005. The measured relationships between broadband albedos and the mass concentration of snow impurities were compared with theoretically predicted relationships calculated using a radiative transfer model for the atmosphere–snow system in which different types (in light absorption) of impurity models based on mineral dust and soot were assumed. The result suggests that the snow in Sapporo was contaminated not only with mineral dust but also with more absorptive soot. A comparison of the measured relationships between broadband albedos and snow grain size for two different layers with the theoretically predicted relationships revealed that the visible albedo contains information about the snow grain size in deeper snow layers (10 cm), and the near-infrared albedo contains only surface information. This is due to the difference in penetration depth of solar radiation into snow between the visible and the near-infrared wavelengths.

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References
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Annals of Glaciology
  • ISSN: 0260-3055
  • EISSN: 1727-5644
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