Satellite information reveals Antarctica ice thinning at ‘extraordinary rate’
This tired old con again. A key Leftist modus operandi is to tell only half the story, leaving out the bits that contradict Leftism. It is simple dishonesty designed to deceive people who are not well-informed on poliical issues.
What they ignore here is Zwally's finding that Antactic ice is ON THE WHOLE increasing and that the relatively small area they concentrates on -- West Antarctica -- has substantial sub-surface vulcanism that inevitably causes some melting. You would melt too if you had a volcano under you
Antarctica is losing ice at a rapid rate, according to new satellite information.
Glaciers are now sliding into the sea because of the warming Southern Ocean as ice vanishes five times faster than it did in the 1990s.
The West Antarctic ice sheet used to be stable a few decades ago, but new evidence shows that up to a quarter of it is now thinning.
In the worst-hit locations, more than 100 metres of ice thickness has been lost.
Completely losing the West Antarctic ice sheet would result in global sea levels rising by about five metres.
This amount of sea level rise would drown coastal cities around the world.
Scientists think sea levels are now rising at the extreme end of what was predicted to happen gradually just a few years ago, and current losses of ice are said to be doubling every decade.
This research has been published in the journal of Geophysical Research Letters.
It describes how scientists used satellites images to compare the sizes of ice sheets from 1992 to 2017 with weather information.
Professor Andy Shepherd, who led the study, said: “From a standing start in the 1990s, thinning has spread inland progressively over the past 25 years — that is rapid in glaciological terms.
“The speed of drawing down ice from an ice sheet used to be spoken of in geological timescales, but that has now been replaced by people’s lifetimes.”
Prof Shepherd also stressed some glaciers, such as the Pine Island and Thwaites glacier basins, are past the halfway point of melting.
This new work should help researchers to more accurately pinpoint where sea levels will rise so appropriate preparations can be made to try and save affected areas.
The underside of glaciers are thought to be melting because the sea is too hot, and not even snowfall can counteract the damage.
Prof Shepherd added: “In parts of Antarctica, the ice sheet has thinned by extraordinary amounts.”
He now thinks West Antarctica melting has caused 5mm of sea level rise since 1992.
He concluded: “Before we had useful satellite measurements from space, most glaciologists thought the polar ice sheets were pretty isolated from climate change and didn’t change rapidly at all. “Now we know that is not true.”