Antarctica and Greenland Track on Worst-Case Climate Scenario


View of a glacier in Chiriguano Bay in South Shetland Islands, Antarctica on November 07, 2019.

View of a glacier in Chiriguano Bay in South Shetland Islands, Antarctica on November 07, 2019.
Photo: Johann Ordonez (Getty Images)

As the ice sheets of the world have been Health deteriorate And Is melting, Meteorologists have warned that further declines could raise the sea’s devastating levels. now, A recent study shows that the ice sheets of Greenland and Antarctica are melting at the worst speed-The case has been predicted by climate landscape scientists, putting coastal communities where millions of people are at risk.

In study Published in Nature Climate Change last week, Researchers compared satellite observations of ice melting at the poles with calculations from models in the Intergovernmental Panel on Climate Change (IPCC)) 2015 Fifth evaluation report. The report is considered the gold standard, synthesizing studies around the world.

Since when did they find the satellite Record keeping began in the early 1990s until 2017, with Greenland and Antarctica suffering a combined defeat 6.4 trillion metric tons of ice. As a result, the global sea level has risen 0.7 inches (1.8) Centimeter).

But the rate of snow loss has not been consistent – it has been increasing rapidly in recent years. About 0.5 inch (1).2 Centimeter) Between 2007 and 2017 sea level has increased. The rate seen over that one-decade period, researchers found, is almost entirely in line with the worst of the IPCC’s 2014 report —case scenario.

“While we anticipated that ice sheets would lose increasing amounts of ice in response to the warming of the oceans and the atmosphere, we could move faster than the rate at which they are melting.” Tom Slater, lead author of the study and climate researcher at the center In a statement, for polar observation and modeling at Leander University.

If ice loss continues at that rate, the 2014 report’s climate models suggest that by 2100, sea level can rise to about 6.7 inches (17 cm) by melting ice from two sheets. This would double the frequency of dangerous stormwater flooding in many of the world’s largest coastal cities, and expose an additional 16 million people to dangerous annual coastal flooding.

“This is enough to double the frequency of storm floods in many of the world’s largest coastal cities,” Anna Hogg, co-author and climate researcher at the School of Earth and Environment at Lead University, said in a statement.

Until recently, thermal expansion is the main reason for the rise in global sea level – the expansion of seawater as it heats. But in the last five years, researchers say, ice melt has become the main thing moving the world’s oceans. The new research is as follows August study The Antarctica ice sheet, which has been melted by water freezing, is causing its destruction. And on the other side of the world, research published earlier this year found that Sunny skies Added to waste Greenland melted in last year’s record. Many of the smaller sources of ice are also becoming problematic, with the disappearance of glaciers. The alps Service Iceland.

Worryingly, the study authors state that since the rise in sea level is already meeting the worst of scientists, the actual worst case may become even more severe. Climate models used to estimate sea level rise may need to be completely redrawn.

“We hypothesized that ice sheets would lose increasing amounts of ice in response to the warming of the oceans and the atmosphere, at a faster rate than the rate at which they are melting.” “Melting outpaces the climate model we use to guide us, and we are not prepared to risk sea level rise.”

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