Rapid reduction of Arctic perennial sea ice

The extent of Arctic perennial sea ice, the year‐round ice cover, was significantly reduced between March 2005 and March 2007 by 1.08 × 10 6 km 2 , a 23% loss from 4.69 × 10 6 km 2 to 3.61 × 10 6 km 2 , as observed by the QuikSCAT/SeaWinds satellite scatterometer (QSCAT). Moreover, the buoy‐based Dr... View More