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Climate Change & The Environment Discuss 1930s photos show Greenland glaciers retreating faster than today at the General Discussion; 1930s photos show Greenland glaciers retreating faster than today Recently unearthed photographs taken by Danish explorers in the 1930s show ...

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Old 06-04-2012, 03:43 AM
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Default 1930s photos show Greenland glaciers retreating faster than today

1930s photos show Greenland glaciers retreating faster than today

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Recently unearthed photographs taken by Danish explorers in the 1930s show glaciers in Greenland retreating faster than they are today, according to researchers.

The photos in question were taken by the seventh Thule Expedition to Greenland led by Dr Knud Rasmussen in 1932. The explorers were equipped with a seaplane, which they used to take aerial snaps of glaciers along the Arctic island's coasts.

After the expedition returned the photographs were used to make maps and charts of the area, then placed in archives in Denmark where they lay forgotten for decades. Then, in recent years, international researchers trying to find information on the history of the Greenland glaciers stumbled across them.

Taken together the pictures show clearly that glaciers in the region were melting even faster in the 1930s than they are today, according to Professor Jason Box, who works at the Byrd Polar Research Center at Ohio State uni.

There's much scientific interest in the Greenland ice sheet, as unlike most of the Arctic ice cap it sits on land: thus if it were to melt, serious sea level rises could occur (though the latest research says that this doesn't appear to be on the cards).

It's difficult to know exactly what's happening to the Greenland ice in total and very different estimates have been produced in recent times. However Professor Box says that many glaciers along the coasts have started retreating in the past decade.

It now appears that the glaciers were retreating even faster eighty years ago: but nobody worried about it, and the ice subsequently came back again. Box theorises that this is likely to be because of sulphur pollution released into the atmosphere by humans, especially by burning coal and fuel oils. This is known to have a cooling effect.
Nobody worried about it then because we didn't have so many scientists hellbent on getting and keeping their grants from governments who wish to redistribute billions from the successful and punish them...
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Old 06-04-2012, 07:31 AM
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Default Re: 1930s photos show Greenland glaciers retreating faster than today

I think the damn Vikings were stealing it.
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Old 04-07-2017, 08:42 AM
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Red face Re: 1930s photos show Greenland glaciers retreating faster than today

How Glaciers Around the World are Melting...

Then and Now: How Glaciers Around the World are Melting
April 04, 2017 - Over the past decade, scientists and photographers keep returning to the world's glaciers, watching them shrink with each visit. Now they want others to see how a warming planet is melting masses of ice in a series of before-and-after photos.
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In the Geological Society of America's GSA Today journal , a group of ice researchers and a photographer-filmmaker published pictures showing how much five of the world's glaciers have thinned. "There is something fundamentally compelling about the approach they take. For all our emphasis on models and math, seeing is still believing," said University of Colorado ice scientist Ted Scambos, who wasn't part of the team.

Under natural conditions, glaciers at times melt and retreat while others grow and advance. But measurements from Earth's 5,200 glaciers show warming temperatures have increased the number of melting glaciers and the speed of glacial retreat, according to the study. Scientists primarily blame man-made global warming from the burning of coal, oil and natural gas. "There is something that touches the heart more profoundly when you see it in pictures than when you see it in maps or reports or graphs," said photographer James Balog, who founded the nonprofit Earth Vision Institute . "It certainly brings it alive."


Frozen areas of the planet, like the Mendenhall Glacier in Alaska, are warming at twice the global average.

Iceland

The Solheimajokull glacier has shriveled by about 2,050 feet (625 meters) between 2007 and 2015.

Alaska

The forward edge of the Mendenhall glacier outside of Juneau has receded about 1,800 feet (550 meters) between 2007 and 2015.

Switzerland

The Stein glacier has shrunk about 1,800 feet (550 meters) between 2006 and 2015. The Trift glacier has retreated nearly three quarters of a mile (1.17 kilometers) between 2006 and 2015.

Peru

Ohio State ice scientist Lonnie Thompson has visited the Qori Kalis glacier since 1974. Between 1978 and 2016, it has shriveled 3,740 feet (1.14 kilometers). Thompson described his regular expeditions to the Peruvian glacier "like visiting a terminally ill family member."

Then and Now: How Glaciers Around the World are Melting
MrLiberty: The reason Vikings were such good sailors...

... is `cause dey was ScandiNAVIans.
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Old 09-13-2017, 05:50 PM
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Red face Re: 1930s photos show Greenland glaciers retreating faster than today

Granny says, "Dat's right - gonna be just like Noah's flood...

Study: Asia's Glaciers Face Massive Melt from Global Warming
Thursday 14th September, 2017 - Scientists say one-third of the ice stored in Asia's glaciers will be lost by the end of the century even if the world manages to meet its ambitious goal of keeping global warming below 1.5 C, affecting water supplies for millions of people on the continent.
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In a paper published Wednesday in the journal Nature, researchers in the Netherlands also examined what would happen if average global temperatures rise beyond 1.5 C(2.7 F) by the end of the century. They concluded that almost two-thirds of the ice in Asia's glaciers could vanish, if no effort is made to curb climate change. "In regions where glacier melt water is an important part of the river flow, the retreating glaciers can become a problem," Philip Kraaijenbrink, a University of Utrecht geographer who led the study, said. "There are many people living in basins that have their rivers originating in Asia's high mountains, such as the Indus, Ganges and Brahmaputra," Kraaijenbrink said. "In these basins, the river water is used for irrigation of cropland, drinking water and for hydropower dams."


The 1.5-degree target was set at the international climate conference in Paris two years ago, but experts say it would require a massive shift to the world economy. In total, the researchers compared 110 climate simulations and found that high mountain glaciers in Asia tended to experience greater levels of warming than the global average. All glaciers analyzed already are losing mass except those in the Kunlun Mountains of western China. Taking into account the effect on melting levels of rubble covering some of the glaciers, they concluded that the amount of ice lost from Asian glaciers is almost proportional to the amount of warming they experience, though with some regional variations. "Even if temperatures stabilize at their current level, mass loss will continue for decades to come until a new equilibrium is reached," the researchers said.

Kraaijenbrink acknowledged that a scenario in which global warming remains under 1.5 C is optimistic. "We are aware that more extreme, business-as-usual scenarios are possibly a more likely future," he said. In a comment published along with the study, J. Graham Cogley of Trent University in Canada said the researchers' glacier model "has some innovative features that might raise eyebrows among glaciologists, but it is difficult to find fault with it as a pioneering effort." "The authors have shown that achieving the 1.5 C target will conserve a substantial fraction of Asia's water resources and that, if we fail in this regard, we will pay in direct proportion to the extent of the failure," Cogley said.

Study Asia Glaciers Face Massive Melt from Global Warming
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