The Polar Portal

If you are at all interested in the state of the sea ice in the Arctic or the Greenland ice cap for that matter then the Polar Portal site is just for you. I just rediscovered it this morning myself and thought that I would just include some of the graphics that are maintained on their site. The chart showing the thickness of the sea ice is interesting showing just were the oldest of the sea ice is, and because they have a thickness they can estimate its volume as you can see in the following graph. Notice that the winter maximum by volume doesn’t occur till towards the end of April, whereas the maximum by extent has already occurred.

This is a chart of the changes in the thickness of the Greenland ice cap between 2017 and 2019, thinning in the west and thickening in the east, at this rate it will turn belly up in about 50 million years.

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