The Arctic is in a death spiral.The top of our world is____1____up faster than anywhere else on the planet,____2____new records for the speed and area of ice melt.
We are on track this year to have one of the lowest summer sea ice coverage so far.It is a huge problem,____3____what happens in the Arctic doesn't stay in the Arctic.
What's more, the Greenland ice sheet, which alone____4____enough water to raise global sea lev-els by 6 meters, is____5____.
The frozen Arctic soil and sediment, or permafrost, is melting,____6____more and more carbon dioxide and methane into the atmosphere.
This year, vast wildfires in the peatlands of Siberia have blazed for more than a month, and the Arctic warming is____7____havoc with weather systems in the northern hemisphere too.
But if you prefer to think simply in terms of money, the eco-nomic____8____of unmitigated Arctic warming by the end of this century was estimated to be $67 trilli-on.
Climate____9____in the Arctic might be more necessary than it first appears because the region's death spiral is a feedback loop.
As the shiny ice melts, models and satellite images suggest we could get a sea ice-free summer any year now.When the ocean is exposed, instead of reflecting sunlight,the dark water absorbs____10____of the sun's heat.
Over the past 30 years, this change corresponds to a warming equivalent to a quarter of all the carbon dioxide released by human activity during that time.
空白处10应填无参考译文
北极正处于死亡漩涡中。地球顶端的升温速度比其他任何地方都要快，冰川融化的速度和面积创下了新记录。今年我们可能会看到迄今为止最低的夏季海冰覆盖率。这是一个重大的问题，因为北极发生的事情不会只影响到北极。
此外，格陵兰冰盖正在消融，仅格陵兰冰盖所含水量就足以使全球海平面升高6米。北极冰冻的土壤和沉积物，或永久冻土，也正在融化，向大气中释放越来越多的二氧化碳和甲烷。今年，西伯利亚泥炭地的大面积野火已经燃烧了一个多月，北极变暖也正在对北半球的天气系统造成严重的破坏。但是，如果你更愿意简单地从金钱的角度考虑，到本世纪末，若北极变暖未得到缓解，带来的经济影响估计为67万亿美元。
对北极的气候干预可能比最初看起来更有必要，因为该地区的死亡漩涡给我们以警示。随着闪闪发光的冰层融化，模型和卫星图像显示，我们现在随时都可能迎来一个无海冰的夏天。当海冰融化、海洋暴露在阳光下，深色的海水会吸收更多的太阳热量，而不再反射阳光。在过去的30年里，这种变化给气候变暖带来的影响，相当于同期人类活动释放的二氧化碳总量的四分之一所带来的影响。