Antarctica

By Edward Doddridge, University of Tasmania | – (The Conversation) – The rhythmic expansion and contraction of Antarctic sea ice is like a heartbeat. But lately, there’s been a skip in the beat. During each of the last two summers, the ice around Antarctica has retreated farther than ever before. And just as a change […]

Antarctica

New Research shows how rapidly Ice Sheets can Retreat: Antarctica’s Melt alone could raise Sea Level 171 Feet

The Conversation

By Christine Batchelor, Newcastle University and Frazer Christie, University of Cambridge | – The Antarctic Ice Sheet, which covers an area greater than the US and Mexico combined, holds enough water to raise global sea level by more than 57 metres if melted completely. This would flood hundreds of cities worldwide. And evidence suggests it […]

Antarctica

The Antarctic Ice Sheet is Melting. And this is bad News for Humanity

The Conversation

By Marta Moreno Ibáñez, Université du Québec à Montréal (UQAM) | – (The Conversation) – Ottawa’s famous Rideau Canal, which turns into the world’s largest ice rink every winter, is too thin to open this winter. Antarctic sea ice concentration reached a record low on Feb. 13. The orange line represents the median sea ice […]

Antarctica

Arctic and Antarctic Ice Sheets in Danger if we blow Past Paris Limit of 1.5° C. (2.7° F) extra Heating

Juan Cole

Ann Arbor (Informed Comment) – Jun-Young Park et al. write in Nature Communications that the collapse of the Arctic and Antarctic ice sheets may come sooner than climate scientists had expected if humanity misses the Paris Climate Treaty goal of keeping extra global heating to 2.7° F. (1.5° C ) above the pre-industrial average. Humanity […]

Antarctica

Do we Have Until 2050 to become Carbon Neutral? What if 27 Climate Feedback Loops are Working together to Shorten our Deadline?

Juan Cole

Ann Arbor (Informed Comment) – Feedback loops are central notions in science. There are two kinds, negative and positive. Negative feedback loops, despite their name, are actually good if you are looking for stability. So for instance say you are too hot, so you sweat. The sweat evaporates, cooling you off. In fact, it could […]

Antarctica

More Evidence that the Massive Thwaites Glacier is Melting Fast, Threatening the world’s Coasts

Juan Cole

Ann Arbor (Informed Comment) – The Thwaites Glacier in Antarctica is in the news again. We are fascinated with it because it is the Godzilla of glaciers, 80 miles across and as massive as Florida. If the ice sheet holding it back were to melt, and if Thwaites plopped into the ocean, it would all […]

Antarctica

Climate Tipping Points could lock in unstoppable Changes to the Planet – how Close are They?

The Conversation

By David Armstrong McKay, Stockholm University | – Continued greenhouse gas emissions risk triggering climate tipping points. These are self-sustaining shifts in the climate system that would lock-in devastating changes, like sea-level rise, even if all emissions ended. The first major assessment in 2008 identified nine parts of the climate system that are sensitive to […]

Antarctica

Our Atmospheric CO2 is now past the point that in the Deep Past has Meant the Melting of the Antarctic Ice Sheets

Juan Cole

Ann Arbor (Informed Comment) – So as a historian, I am particularly interested in what the past tells us about the present. I’ve taught courses on climate change in history. But of course my kind of history doesn’t go back very far from the point of view of physical scientists. The academic discipline of “history” […]

Antarctica

What’s worse than a Slow-Moving Doomsday Glacier like Thwaites? A Raptor Glacier Sprinting for the Ocean!

Juan Cole

Ann Arbor (Informed Comment) – As regular readers know, I’m fascinated by glaciers. Growing up in France, I had the opportunity at one point to learn to ski in the Swiss Alps. The US army does not consistently supply a jet set lifestyle to dependents of non-commissioned officers, to say the least, but sometimes you […]