EVAPORATION FORM OF ICE CRYSTALS IN SUBSATURATED AIR AND THEIR EVAPORATION MECHANISM

• Main Authors: ゴンダ タケヒコ, セイ タダノリ, Takehiko GONDA, Tadanori SEI
• Format: Report
• Language: English
• Published: Faculty of Science and Technology, Science University of Tokyo 1987
• Subjects: Mizuho; Mizuho Station; Antarc*; Antarctica; 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=3529; http://id.nii.ac.jp/1291/00003529/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3529&item_no=1&attribute_id=18&file_no=1

The evaporation form and the evaporation mechanism of dendritic ice crystals grown in air of 1.0×(10)^5 Pa and at water saturation and polyhedral ice crystals grown in air of 4.0×10 Pa and at relatively low supersaturation are studied. In the case of dendritic ice crystals, the evaporation preferentially occurs in the convex parts of the crystal surfaces and in minute secondary branches. On the other hand, in the case of polyhedral ice crystals, the evaporation preferentially occurs in the parts where screw dislocations or stacking faults emerge. On the basis of these experimental results, the formation mechanism of single bullets observed at Mizuho Station, Antarctica is inferred.