evidence: Studies differ widely in their predictions of when summer sea ice will melt completely. Current climate models tend to underestimate the rate of sea ice retreat.10) Prior to the events of 2007, the IPCC forecasted an ice-free Arctic for the latter part of the twenty-first century.11) The panel reported that "the projected reduction [in global sea ice cover] is accelerated in the Arctic, where some models suggest that summer sea ice cover could disappear entirely in the high-emission A2 scenario in the latter part of the 21st century."12) Most studies published since the sea ice collapse of 2007 expect a dramatic reduction of summer ice by the mid-2020s. In an interview with National Geographic, Mark Serreze from the National Snow and ice Data Center (NSIDC) in Boulder, Colorado is on record saying the Arctic’s summer sea ice will fully melt around 2030. Other scientists do not expect the summer ice to survive beyond 2017.13)