Permalink : http://hdl.handle.net/2115/8320

氷や雪のもつ〝滑りやすさ"は，スキーやスケート等のウィンタースポーツには欠かせない性質である．この〝滑りやすさ"の原因は，氷表面に存在する液体状の層（擬似液体層）にあると考えられている．氷結晶は，その表面に擬似液体層を持つことにより，成層圏におけるオゾン破壊や雷雲の帯電等，様々な自然現象を引き起こす．本稿では，最近の分子動力学計算による研究を中心に，氷表面の構造とダイナミクスについて解説する．
The surface of ice and snow is slippery. This slipperiness property of ice surface has usually been explained by a lubricating layer of water film, which exists on the surface. Ice crystals have a melting layer on the surface even at low temperatures below the bulk melting point. The surface melting of ice plays a fundamental role in many phenomenon found in our everyday life as in charge transfers in thunderstorms, frost heave, and in winter sports such as skiing and skating. Further, chemical reactions in the melting layer of ice accelerate the destruction of the ozone layer in the stratosphere. I review the dynamics of the ice surface and the effects of the dynamics on the formation process of the melting layer on ice surface.