解放军文职招聘考试海洋升温 冰架消退2

 Meanwhile, a dozen small ice shelves, which sit on relatively warmer water, produced half the total water from frozen ice melt during the same period. "And that means that in a regime of climate warming where the properties of the Southern Ocean are changing, they may be changing faster than other oceans in the world. We may be in a situation where the coastline of Antarctica may be changing at a faster pace than we thought in the past." Rignot says the ocean is a very sensitive system, even small changes, like changes in ocean circulation driven by wind, can make a huge difference in ice shelf melt. "So if the wind regime changes in the Southern Ocean, it's gonna change the way the ocean heat is distributed on the coast, and that's gonna affect glaciers."

60% of the planet's fresh water is locked in the massive Antarctic ice sheet. Rignot says the study will help scientists predict how the continent responds to a warmer ocean and contributes to global sea level rise. "I think it places more emphasis on the enormous importance of ice-ocean interaction in the Antarctic. If we really wanna understand how these ice shelves evolve and will evolve in the future we must understand how the ocean is contributing to their melting on the underside."

同时，一些较暖水域的小型冰架，（融化）产生了占总量一半的冰融水。“这意味着受到气候变暧影响，南极海域的属性正在变化，其变化速度可能比世界上的其他海域都快。现在的情况也许是，南极洲海岸线的变化或许比我们先前预计的更加迅猛。”里格诺特说海洋系统极度敏感 。即使是细微的变化，比如风海流的变化，都可以对冰架融化产生巨大的影响。“所以说如果南极海的风发生变化，沿岸海域的热量分布会改变，冰川也会因此受到影响。”世界上有60%的淡水固定在南极洲的冰盖下。里格诺特说这个研究可以帮助科学家们预测南极洲对海洋温度升高的反应，并了解南极洲将在全球海平面上升中起到怎样的作用。 “我认为这引起了人们对南极冰水相互影响的意义的强烈关注。 如果我们真的想知道冰架的演变及其未来演变趋势，我们必须了解底层海水在冰架自融中起到了怎样的作用。”