Greenland: Greenland’s ice sheet lost about 8.5 billion tonnes of surface mass. In a single day at the end of July. Enough ice melted to cover.
the entire US state of Florida in more than 5 cm of water. Researchers say on July 28, temperatures in eastern Greenland. reached an all-time high of 19.8 c. Scientists have calculated Greenland’s ice is melting faster.
then at any time in the past 12,000 years, Researchers say at the current pace, the melting ice sheet could add. up to 33 cm to global sea levels by the year 2100. Rising sea levels may change ocean currents, alter ecosystems and threaten coastal cities.
And in the unlikely event that all of Greenland’s ice melts. The global sea level would jump by about 6 meters.
The scale of disappearing ice is so large that the losses on Tuesday alone created enough meltwater to drown the entire US state of Florida in two inches, or 5 cm, of water.
Ice that melts away in Greenland flows like water into the ocean, where it adds to the ongoing increase in global sea level caused by human-induced climate change.
”It’s a very high level of melting and it will probably change the face of Greenland, because it will be a very strong driver for an acceleration of future melting, and therefore sea-level rise,” Said Marco Tedesco, a glacier expert at Columbia University and adjunct scientist at Nasa.
Tedesco said a patch of high pressure is sucking and holding warmer air from further south ” like a vacuum cleaner” and holding it over eastern Greenland, causing an all-time record temperature of 19.8 C in the region on Wednesday.
As seasonal snow melts away, darker core ice is exposed, which then melts and adds to sea-level rise.
” We had these sort of atmospheric events in the past but they are now getting longer and more frequent,” Tedesco said.
”The snow is like a protective blanket so once that’s gone you gel locked into faster and faster melting, so who knows what will happen with the melting snow. It’s amazing to see how Vulnerable these huge, giant areas of ice are. I’m astonished at how powerful the forces acting on them are.”
Greenland’s melting season usually lasts from June to August. The Danish government data show that the island has lost more than 100bn tons of ice since the start of June this year and while the severity of melting is less than in 2019 – when 11bn tons of ice was lost in a single day- the area affected is much larger in 2021.
”It’s hard to say if it will be a record year for melting this year but there is a tone of warm and moist air over the ice sheet that’s causing an amazing amount of melt,” Said Brad Lipovsky, a glaciologist at the University of Washington.
”The alarming thing to me is the political response or lack of it. Sea-level rise is like a slow-moving train, but once it gets rolling you can’t stop it. It’s not great news.”