Category Archives: Polar

Large and irreversible future decline of the Greenland ice-sheet

By: Jonathan Gregory Sea-level rise is one of the most serious consequences of global warming. By the end of this century, if emissions of greenhouse gases continue to increase (mostly carbon dioxide, from burning oil, natural gas and coal), global … Continue reading

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Are Eurasian winter cooling and Arctic Sea ice loss dynamically connected?

By: Rohit Gosh The observed sea ice concentration (SIC) in the Arctic has been declining in recent decades. Temperatures have been rising all over the planet, but warming has been much faster over the Arctic, a phenomenon known as Arctic … Continue reading

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It melts from the top too …

By David Ferreira The global sea level rises at about 3 mm/year. Oceans absorb nearly 90% of the heat trapped in the atmosphere by anthropogenic gases like carbon dioxide. As water warms, it expands: this effect explains about half of … Continue reading

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Potential links between Arctic sea ice loss and mid-latitude weather: revisiting an influential earlier study

by Len Shaffrey The Arctic is changing rapidly due to human emissions of greenhouse gases. Arctic sea ice extent has been declining by 12% per decade since reliable satellite estimates began in 1979. By summer 2012, Arctic sea ice extent … Continue reading

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Melt ponds over Arctic sea ice

By Daniela Flocco Melt ponds develop over Arctic sea ice during the melting season from the accumulation of melt water from ice and snow. These have become increasingly important over the last few decades because they have been more prevalent … Continue reading

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Polar Prediction School

By Jonny Day During the last 2 weeks Dr Jonny Day spent two weeks lecturing and coordinating a Polar Prediction School for graduate students and early career researchers. The school is a joint initiative from the World Weather Research Programme … Continue reading

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What’s happening in the Arctic sky?

By Michaela Hegglin Meteorologists may say clouds are all about weather, but they sure aren’t, or at least not all of them! This late winter, people watching the sky in northern England witnessed spectacular appearances of nacreous clouds, also referred … Continue reading

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The melting of Arctic sea ice and the future of trans-Arctic shipping

By Keith Haines Most people will be familiar with news of the changing conditions in the Arctic where climate change seems to be at its fastest. The loss of sea ice each summer seems to show a rapidly declining trend, … Continue reading

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Projecting climate changes for the Earth System

By Robin Smith With the COP21 UN climate change conference going on in Paris, questions about how the global environment will change in the coming decades and what impact that will have on the people and communities that live in … Continue reading

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Can declines in Arctic sea ice impact the weather over Europe?

By Ruth Petrie Dramatic declines in Arctic sea ice have been observed over the past few decades. In the 1980s it was typical that at the September minimum there would be between 6.5 and 8 million km2 of sea ice; … Continue reading

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