fresh-water ice

While 75% of our planet is covered with water, only about 2% is fresh water that comes from rivers, lakes, ice and snow.

虽然地球的75%被水覆盖，但只有大约2%是来自河流、湖泊、冰雪的淡水。

Groundwater may constitute anywhere from approximately 22 to 30% of fresh water, with ice accounting for most of the remaining 78 to 70%.

地球上所有的地下水大约占淡水总含量的22%至30%，而冰占所有淡水的70%至78%。

But a sudden influx of fresh water from melting ice could also disrupt the ocean currents that drive upwelling.

“海洋生态系统是由多种资源孕育而非单一依靠冰川，”胡德说，“例如，洋面上升是一种自然循环现象，富含养分的冷水从海底升起，滋养了海面的生物。 但是，由于冰川的融化而导致大量淡水突如其来涌入海洋，这可能会破坏洋流的正常循环。”