Solid water is always accompanied on its surface with a liquid film, as well as liquid water is alw

Answer: According to the phase diagram of water (a curve showing the state of water - solid-liquid-gaseous - is a function of pressure and temperature) melts ice with increasing pressure below 0 C; However, it would take very large pressure to liquefy ice just below 0 C; this statement could best apply to the ice skating, where a correspondingly large pressure through the small surface of the runners is created, so you glides on a thin liquid film and not on solid ice. Without keep food warm runners is the pressure we exert through walking on ice, sure too low.
Solid water is always accompanied on its surface with a liquid film, as well as liquid water is always water vapor over its surface; with increasing temperature of the water vapor pressure is larger, smaller with decreasing temperature, so we have much higher humidity in summer.