Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.

当然，当冰融化的时候，会降低周围水中的盐度。

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This is because as the ice sheet melts, its surface will be at ever lower altitudes, where the air will be progressively warmer, even if global warming ceases.

这是因为，随着冰盖融化，其表面高度将越来越低，即使全球变暖停止，那里的空气也会逐渐变暖。

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When ice melts and disappears this "albedo" effect is lessened, contributing to a rise in temperature.

冰层融化消失后，这种“反射能”效应减弱，从而导致气温上升。

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"When they come close to the Sun, this ice melts - solar wind blows this material out into space, so you get a tail of matter coming off the comet, " explains O'Brien.

BBC: Star of Bethlehem: The astronomical explanations