A COMPARISON OF OBSERVATION WITH MODELING FOR ALBEDO AND TRANSMITTANCE OF SNOW

Snow surface albedo and transmittance inside the snow have been investigated by observation and modeling. Observations were taken by a grating type spectrometer at Tokamachi in March 1993. The observed snow was old and very wet. Microscope photo-graphs of snow grains taken at this time indicate that...

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Bibliographic Details
Main Authors: アオキ テルオ, セコ カツモト, アオキ タダオ, フカボリ マサシ, Teruo AOKI, Katsumoto SEKO, Tadao AOKI, Masashi FUKABORI
Format: Report
Language:English
Published: ABSTRACT 1994
Subjects:
Polar meteorology and glaciology
Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology
Online Access:https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3845
http://id.nii.ac.jp/1291/00003845/
https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3845&item_no=1&attribute_id=18&file_no=1
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Summary:Snow surface albedo and transmittance inside the snow have been investigated by observation and modeling. Observations were taken by a grating type spectrometer at Tokamachi in March 1993. The observed snow was old and very wet. Microscope photo-graphs of snow grains taken at this time indicate that snow grain is spherical particles with size of about 1.0μm. Surface albedo and transmittance of snow by a multiple scattering model for the atmosphere-snow system with pure snow grain size of 1.0μm have similar wavelength dependence to our observation. Though both the maximum albedo and transmit-tance have been observed at the wavelength 0.55μm, model calculation shows that this wavelength is 0.45μm. Moreover, the observed albedo is lower than the model with a maximum of 10% in visible region. It is considered that these differences are mainly due to impurities and/or liquid water in natural snow.

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