Sea ice is frozen sea water that waxes and wanes in response to the cooling and warming of the Arctic throughout the year. The ice pack reaches its greatest extent at the end of the winter, during March, and its lowest point at the end of the summer, usually in mid-September. This point is known as the sea ice minimum.
Since the early 1970s scientists have been using satellites to monitor the amount of Arctic sea ice present throughout the year. Data suggests that during this period the amount of sea ice in the Arctic has decreased by around 3% every ten years but, worryingly, they have discovered that the rate of melting has increased significantly in recent years.
Arctic Sea Ice Minimum