Arctic Sea Ice by Russia and Climate Change Issues69.8N 163.3E
Since 1979 the Arctic region has been extensively monitored by satellites. They detect the ice surface area, the extent of the area covered with ice and also the total amount or volume of ice. The results of these observations are startling. For example, sea ice area and the amount of perennial (multi-year) ice has decreased dramatically over the past 3 decades. In 2012, the September average ice extent dipped below 4 million km², which is about half of what it was in 1979. Ice volume shows a comparable rapid decrease (click here for more information).