Frozen surface of the water. Aerial shot. River and stream in winter. Pole poles antarctica north south sea antarctic frosted frost icy winter snow iced icebound icefield thick sheet polar shards fractures crack lake river stream dam white green blue below zero subzero dry cold cool glassy plates plate extreme climate region zone glacial glacier perishing iciness best hoarfrost floe air weather wintertide canal coldest rock stream brook creek hard wintertime supercooled freezing soft northern southern eastern east western west boreal UHD 3840X2160 4K.