The National Snow and Ice Data Center (NSIDC) announced on [September 15] that the extent of sea ice in the Arctic Ocean has apparently hit its summer minimum. The value of 4.14 million square kilometers (1.60 million square miles) reached on September 10 comes in just behind the record-low extent of 2012 and in a statistical tie with 2007 for second place (see Figure 1). Although refreezing has begun, it’s possible that a late burst of melting could lead to an even lower value in the next few days. This year’s minimum came in below the 4.38 million sq km predicted in August by the median of 39 outlooks submitted by participants in the Sea Ice Prediction Network