00:02Ice thickness matters too.
00:04Multi-year ice can grow over a decade to be four meters thick.
00:08It is dense and melts slowly.
00:12In the old Arctic, most ice was multi-year.
00:15Now it is vanishing.
00:19Cellular observations are basically carried out since the late 70s.
00:23You can easily tell the extent at a daily basis of Arctic sea ice.
00:27But also sea ice motion, the sea ice motion pattern.
00:32Satellite images reveal that thick multi-year ice,
00:35shown here as brighter white, has been disappearing for years.
00:39But they also show that the flow of polar ice is changing.
00:43Sea ice in the Arctic Ocean is not a static thing.
00:46It's kind of moving around constantly. It's driven by winds.
00:49And there are large-scale circulation patterns of sea ice.
00:53And one very important one is the trans-polar drift,
00:57where sea ice that is actually formed on the Siberian shelf, seas,
01:02is kind of pushed towards the central Arctic, towards the North Pole.
01:05And then it goes on to Fram Strait, where it leaves the Arctic Ocean and then melts.
01:13And then it goes on to Fram Strait now,
01:16If it leaves the Arctic Ocean and the Sea miles of sand,
01:16it's been печ of the Seven.
Comments