Farther Into Uncharted Territory: Arctic Ice Greatly Weakened As Spring Begins
The story of Arctic sea ice is one of short term complexity overlying an inexorable long term trend of decline. It has thus been difficult for sea ice monitors to forecast seasonal ice growth and retreat, despite a larger and significant warming of the Arctic.
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(New ice has formed north of Greenland following a massive polar warming event last week. This ice is thin and faces the warm up of spring and summer with uncertainty. Sitting over a region that is typically filled with thick ice, it could provide a back-door for melt into the Central Arctic come summer. As usual, weather will play a key role in this year’s melt, despite the undeniable longer term trend of loss. Image source: NASA.)
Undeterred by these facts, a number of key factors stand out in 2018 — following a winter in which the Arctic has suffered considerable warming and related impacts to the ice. Today, Arctic sea ice extent is at its lowest levels on record. Volume, is at the second lowest levels ever measured. And this year’s freeze season (October through February of 2017-2018) was the warmest ever recorded (see link below). Taken at face value, these are pretty stark statistics. But they don’t tell the whole story. Not by a long shot.
The Arctic is warming up twice as fast as the rest of the world. It has been doing so since around 2000 when Polar Amplification — the science-based expectation that the poles will warm faster than the globe as greenhouse gas levels rise — really began to kick in. So the present warm peak in the Arctic is on top of a record spate of accelerated warming. In the graphs it looks like a rocket ship taking off.
Link to tweet
EDIT
The thicker ice floes of yore are now mostly a bare memory. A recollection of past cold blasted away by fossil fuel burning and inexorable thaw. This year, an LNG tanker crossed the thinning ice during winter time. Bearing with it a great load of climate change quickening gas destined to be burned in some nation still entangled by a heat-producing web of gas plants, coal mines, and diesel and gasoline cars.
Link to tweet
EDIT
https://robertscribbler.com/2018/03/06/delving-further-into-uncharted-territory-arctic-sea-ice-greatly-weakened-at-start-of-spring-2018/
