While a warming climate could spell disaster for countless snow-loving species, an ice-free Arctic artery could also offer critical trade alternatives to the Russian-controlled Northern Sea Route, a new study has found. Climate models indicate that parts of the Arctic Ocean that were once blanketed in ice year-round are now warming so rapidly that they will likely be iceless for months on end in as soon as two decades, according to the study, published in the Proceedings of the National Academy of Sciences.