Unlike most of the 47 glaciers here in the Southern Patagonian Ice Field of Argentina and Chile, Perito Moreno is one of three glaciers that isn’t retreating, it’s advancing. Every day it moves several feet as it calves off the same amount. Glaciologists call this equilibrium.
Perito Moreno’s massive 19-mile-long-by-3-mile-wide ice field’s walls shoot up 200 feet from the surrounding gray-blue waters of Lake Argentino. Half a million visitors flock to see the natural spectacle each year. This UNESCO World Heritage park has 2-1/2 miles of walkways offering tourists up-close views of both the north and south glacial faces. Intrepid visitors can take boat or ice-walking trips.
Scientists aren’t sure why this particular glacier is stable while most of the other glaciers in the region are melting and retreating. The Upsala and Viedma glaciers, two larger glaciers north of Perito Moreno, have retreated dramatically. A constant climate is needed to keep glaciers stable, says Dr. Samuel Nussbaumer of World Glacier Monitoring Service. Climate change is blamed for the worldwide meltdown of most glaciers.
ER, UM... THERE IS NO SUCH THING AS A CONSTANT CLIMATE.
NEVER HAS BEEN - NEVER WILL BE.
ADVANCING GLACIERS COLLECTED DEBRIS AND WHEN THEY RETREATED LEFT BEHIND LONG ISLAND. AND MANKIND HAD NOTHING TO DO WITH THIS NATURAL CYCLE.
CLIMATE ALARMISTS POINT OUT THAT WESTERN ANTARCTICA IS MELTING, BUT IF THEY TELL YOU MAN-MADE CO2 IS THE CAUSE THEN THEY ARE LYING:
FIRST OFF: IF IT WAS DUE TO GLOBAL CHANGE, THEN WHY WOULD ALL OF ANTARCTICA BE MELTING!?
So a new study of an ocean sediment core taken from deep water just offshore -- described in the latest issue of the journal Nature -- is drawing attention not so much for its unexpected results, but for the gaping hole it is beginning to fill.
Some 43 meters (141 feet) long, the core analyzed by Amelia Shevenell at University College London and US colleagues gives a continuous profile of sea surface temperatures of the Southern Ocean out near the tip of the peninsula going back 12,000 years -- the warm, relatively stable climate era known as the Holocene.
Before the recent warming, a long-term cooling trend -- driven by regional effects of orbital cycles -- is punctuated by abrupt, shorter-term changes driven by more earthly connections: westerly winds and the El Niño Southern Oscillation, the scientists report.
During the past 2,000 years, the peninsula seems strongly effected by the El Niño-La Niña cycle in the tropical Pacific Ocean that periodically spreads warm and cool sea surface temperatures along the equator.
The authors report that during cool La Niña conditions -- such as the strong episode currently gripping the eastern tropical Pacific -- westerly winds intensify and move farther south, warming the Western Antarctic Peninsula.
THE WESTERN PENINSULA HAS BEEN USED FOR YEARS BY AGW ALARMISTS AS IF IT PROVED MAN-MADE GLOBAL CLIMATE CHANGE.
One of the reasons you work so hard to get to a place like this is because it is just about as remote as one can imagine – there is dead silence. 60 Minutes was on the Warsaw Plateau, which is about 1,500 feet or so from sea level on King George Island in Antarctica.
The other reason one comes to the Warsaw Plateau is to see some of the most dramatic evidence anywhere in the world of climate change.
Over the past 50 years, this region, the Antarctica peninsula, the northwestern part and the islands around it has been going up in temperature about one degree every decade and that makes the region the fastest warming place on earth.
Mayewski is on the plateau to drill an ice core because, when ice is laid down, it captures everything in the air. Drilling down is drilling through time.
"The ice cores are really the only way we have of demonstrating what greenhouse gas levels were like prior to their first measurement by humans," he explains.
By chemically analyzing the core, he can see what was in the air thousands of years ago. Back in Maine, Mayewski has a vault of hundreds of ice cores. He once led a team that drilled a glacier core two miles deep. He and his colleagues have found some of the most powerful evidence that man is changing the climate.
What do ice cores tell him about greenhouse gases?
"Now we know from the ice core record that the levels and the speed of rise are significantly, significantly greater than anything in the last 850,000 years," Mayewski explains. "And the levels that we expect to get by the end of this century are going to be double what we have today."
Mayewski and his colleagues have timed the sudden rise in greenhouse gases to the start of the industrial revolution about 150 years ago. If, as expected, greenhouse gas pollution doubles by the end of the century, temperatures are predicted to rise four to six degrees.
"You could very well see sea level rises on the order of several feet and perhaps even several tens of feet," Mayewski predicts.
Asked what that would mean for coastal areas around the world, Mayewski tells Pelley, “If sea level were to rise like that, that would be tremendous changes. Immense migrations.”
"It would be the largest catastrophe that the modern world would have experienced," he adds.
WELL, MAYEWSKI IS WRONG. THE MELTING IN NW ANTARCTICA HAS NOTHING TO DO WITH MAN-MADE CO2 OR THE INDUSTRIAL REVOLUTION.
IOW: AGW = TFBS.