One-third Of Antarctica’s Ice Could Collapse At Current Temperatures
Antarctica's ice perspective on the world where climate change goes even further than some pessimistic estimates
Antarctica's ice sheet is one of the two ice caps in the world. One-third of Antarctica’s massive ice caps could collapse into the oceans if global temperatures rise above 4 degrees Celsius (7.2 degrees Fahrenheit). Usually when these floating ice caps on water do not directly raise sea level; These merge evenly into the ocean. However, large amounts of glaciers on the frozen continent pose a significant obstacle to turning toward the sea. If these inland glaciers reach open water, sea levels could rise catastrophically.
Towards the end of the 21st century, in most parts of Antarctica’s Peninsula - the risk of snowfall was 34% - a region of West Antarctica north of South America. The amount of risky ice is about two-thirds of the ice sheet on Antarctica’s Peninsula. About 190,000 square miles (500,000 square kilometers) of Antarctic ice will be at risk. Which is a much larger area than California.
"Pieces of ice act as an important barrier to glaciers to prevent sea level and sea-level rise. When they break, it is called a huge cork.
Like removing it from a bottle, it pours an unimaginable amount of water into the ocean from a glacier, "said Ella Gilbert, a scientist who is a lead author at the University of Reading, England.
The good news, however, is that this kind of Antarctica's ice -break is far from over. During this time the world pre-industrial level temperature has risen to about 1 centigrade (1.8 F). According to an Associated Press report, if we could maintain a temperature of 2 centigrade (3.6 F) - which some scientists suspect might not be possible - half of the 34% ice would be saved from the threat. If the temperature can be turned off at a temperature of 1.5 degrees centigrade (2.7 f), the affected area will be much smaller.
New research has modeled the processes that led to the beginning of the iceberg melt, including Larsen C, Wilkins, Pine Island, and Shackleton, which gave a new idea. Some of this has already begun: Live Science reports that New England-sized icebergs have already begun to fall into the water from Larsen C.
Under normal circumstances, a piece of ice melts a bit in summer. The ice melts slowly through the cracks and then freezes deeply again. But when too much is melted, the sea surface is filled with water.
Gilbert said in a statement, "We know that when molten ice accumulates on the surface of ice sheets, they become brittle and can collapse."
In the past, researchers have modeled the future behavior of icebergs throughout Antarctica's ice, without focusing on individual icebergs. The ice model modeled in this new study melts into different scenes with the same resolution and complexity as the previous model. Outcome: Antarctica's ice perspective on the world where climate change goes even further than some pessimistic estimates and where society has made significant progress against greenhouse gas emissions.
"I think we're currently looking for something between 3 and 3.5 centigrade (5.8 to 6.3 f). That doesn't seem to be out of the question at 4-C (7.2 f) - if we're unlucky enough to get to that point. "Andrew Dessler, a Texas A&M University scientist who studied the possibility of future warming, was not involved in the study.
In other words, in a world where climate change is at a stage where one-third of the Antarctic ice is at risk, there is a greater failure to stop greenhouse gas emissions or some warming response, which has not yet been discovered.
My personal opinion is that the question below 1.5 degrees (2.7 F) is far from the question unless we establish some kind of solar radiation geoengineering, "Dessler told Live Science, but not every scientist agrees." 3.6 F) It would be very difficult to keep up, but I believe that if all the governments of the world worked together on climate change, we would still be able to limit global warming without significant economic costs. I'll leave it to you to decide. "