Arctic sea ice melts back during summer and grows or "recovers" during winter. The winter maximum extent is usually reached in March. The graph below shows Arctic sea ice extent every September since 1984.
Which statement best describes how evidence of Arctic ice melt changed over time?
- The Arctic ice has decreased three million square kilometers in 32 years.
- Arctic ice extent in the year 2016 is equal to Arctic ice extent in 1984.
- Arctic ice extent is lowest in September 2016 and highest in 1984.
- The Arctic ice extent was highest between 2000 and 2016.
The Arctic ice has decreased three million square kilometers in 32 years.
According to the graph, the Arctic ice has started decrease from the year 1984 up to 2016 about three million square kilometers. In 1984, the Artic ice extend about 7 million square kilometers.
While on the other hand, in 2016, the Artic ice decrease from 7 million square kilometers to 4 millionsquare kilometers which is 3 million square kilometers decrease in 32 years due to climate change so we can conclude that Arctic ice has decreased three million square kilometers in 32 years.
