Some Features of the Turbulent Transfer on the Bare Ice Field Near the Yamato Mountains, East Antarctica

• Main Author: Shun'ichi Kobayashi
• Format: Report
• Language: English
• Published: The Institute of Low Temperature Science, Hokkaido University 1979
• Subjects: East Antarctica; Yamato; Antarc*; Antarctica; Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=955; http://id.nii.ac.jp/1291/00000955/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=955&item_no=1&attribute_id=18&file_no=1

Measurements were made of profiles of wind speed and air temperature on the bare ice surface on the lee of the Yamato Mountains from 1 to 7 December 1973. The vertical profile of air temperature was found unstable in the daytime when the wind speed decreased, as the bare ice surface was heated by solar radiation. Consequently, a mean eddy heat flux transported from the surface was 50ly/day. As for an energy budget, estimated latent heat flux was about 150ly/day which indicates the evaporation of 0.25cm/day in the summer. The observation of wind turbulence by the use of sonic anemometer showed a strong turbulence generated by nunataks. This strong turbulence contributes to the surface ablation of bare ice in the summer.