Author(s): Nobuyoshi Ishikawa; Atsushi Takizawa; Toshiyuki Kawamura; Kunio Shirasawa; Matti Lepparanta
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Abstract: The change in radiation properties with sea ice growth was examined at Lake Saroma, Japan and Tvarminne, the Gulf of Finland. The reflectivity and transmissivity changed greatly with ice growth at Saroma but displayed a small change in the reflectivity and a large change in the transmissivity at Tvarminne. These differences were explained by the ice structure differences, such as bubble volume, grain size and brine volume of sea ice. The change of heat balance with ice growth was measured on thin ice surface and compared with those of thick ice and snow surfaces. The surface temperature of the thin ice was higher than the air temperature. This resulted in the heat loss from the surface by the negative radiation balance and negative sensible heat flux.
Year: 2002