Heavy rain and melting snow have swollen the river to its highest level in decades.

暴雨和积雪融化已经使该河流水位到达几十年来的最高水平。

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They understand that the greatest and least predictable effect will be the melting of the polar-ice sheets and the consequent rise in sea level.

他们也明白，最大和最不可预测的影响将是极地冰盖融化和随之而来的海平面上升。

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The 10 indicators of climate change include measurements of sea level rise taken from ships, the temperature of the upper atmosphere taken from weather balloons and field surveys of melting glaciers.

气候变化的10项指标中包括船只进行的海平面上升测量，气象气球对上层大气温度的测量以及对冰川融化进行的实地调查。

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Since the total mass of the ocean and ice remains unchanged during the melting process, this has often led to the erroneous assumption that sea level will be unaffected by the melting of floating ice, say geologists David Holland and Adrian Jenkins.

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Much global warming alarm centers upon concerns that melting glaciers will cause a disastrous sea level rise.

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To them, such a fate might have been more dramatic and plausible than the change in sea level that would have accompanied the melting and gradual retreat glacial icesheets.

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