Arctic Sea Ice Extent

Each year the amount of ice in the arctic sea fluctuates depending on the season. Since 1979, NASA has been tracking these fluctuations using satellite data. The amount of ice tends to reach it's maximum in March and it's minimum in September. This dataset consist of the minimum extent in September of each year. As defined by NASA, Sea ice extent is the integral sum of the areas of all grid cells with at least 15% ice concentration. The data can be found at NASA's climate website: https://climate.nasa.gov/