Below is a collection of graphs that shows the development from 1979 in both Arctic and Antarctic and combined. The presention aims to give the full picture of the polar ice extent development.
The visuals are interactive and some can be filtered in various ways (by location, months, years). Read about the data at the end of the page.
Polar (Arctic and Antarctic) Ice Extent (Daily data)
However, Verstat shows both Arctic and Antarctic in the same graph with fixed y-axis so that it is possible to see the full picture of world polar sea ice on a daily basis.
This visual shows the total polar ice extent on a daily basis by year. Arctic and Antarctic daily values are added together.
Polar (Arctic and Antarctic) Ice Extent (monthly data)
This visual shows the development in yearly average ice extent. The data can be filtered on month and year. Black dotted line shows the linear trend.
This visual shows the development in yearly avereage ice extent for Arctic and Antarctic (switch between them using the filter in the top left corner). The data can be filtered on month and year.
This visual shows the total ice extent by month and linear trend. The data can be filtered by month, localtion and year.
information about the data:
Important definition: Sea Ice Extent (SIE) is defined as the area covered by a significant amount of sea ice, that is the area of ocean covered with more than 15% Sea Ice Concentration (SIC). Sea Ice Concentration is the fractional coverage of a grid cell that is covered with sea ice.
The OSISAF monthly SIE values are computed as averages of the daily SIE values, also using the interpolated daily values.
The data is automatically collected from osi-saf.eumetsat.int on a daily basis.