The fear is that melting ice, along with increased snow and rain, could reduce the density and salinity of the top layers of the sea, making them more buoyant.

人们担忧的是正在融化的冰和不断增加的雨雪可能降低海洋表层水体的密度和盐度，导致其更容易滞留在海洋表层。

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Getting there took me through two days of snow, ice and below-freezing camping conditions, using crampons, an ice axe, and more layers than I thought I owned.

经受着冰雪和低温的考验，在鞋底钉和冰斧的帮助下，我用了整整2天的时间才终于成功登顶。

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Visitors to Harbin's popular ice and snow festival should dress in layers -- and don't be surprised if you're digital camera acts up because of the cold weather.

参加哈尔滨冰雪狂欢节的游客需要多穿几件衣服，当数位相机停止工作时，你也不必惊慌，因为那儿的天气实在是太寒冷了。

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The project aims to help fill the current gap in existing measurement studies by satellites and submarines - which cannot differentiate between ice and snow layers.

BBC: Polar survey team start journey

The radar sends radio wave pulses into the ice sheet, and the waves bounce off buried features, informing researchers about the characteristics of the snow and ice layers.

ENGADGET: NASA's GROVER eco-rover to examine Greenland's ice sheet (video)

The water, albeit in smaller volumes, continues to flow, forming unstable layers of snow, slush and ice (see 2:08 when Gadd sinks his hooks into a piece of snow that simply crumbles away).

BBC: Daredevil duo is the first to scale Niagara Falls