Climate, melting ice and sea level

Warming and Climate Change: causes, consequences, analysis ... Debate on CO2 and other greenhouse gas.
moinsdewatt
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Re: Climate, melting ice and sea level




by moinsdewatt » 03/08/19, 13:05

Greenland is also affected by an exceptional heat wave.

August 2, 2019
......
After Europe, Greenland is currently affected by an exceptional heat wave, Météo France said on Wednesday 31 July. For example, a weather balloon sent to Danmarkshavn, on the east coast of the Danish autonomous territory, "measured a record temperature, all months combined, of 14,4 ° C". This is much more than the old 13 degree record held in July 2002.

Going back to the big island, a temperature of 16 degrees was recorded at the North station, just 900 km from the North Pole. In Qaarsut, in the west, residents were able to enjoy a summer temperature of more than 20 degrees.

Consequences for the ice cap and the ice floe
These temperatures have harmful consequences for the ice cap, made up of fresh water. As of Wednesday, 56% of the polar ice cap (Greenland ice sheet) has undergone a surface melt of at least one millimeter, said Polar Portal. "More than 10 billion tonnes of ice have been lost to the ocean due to surface melting alone," said the Danish site, relayed by Numerama.

The boreal pack ice, which is made up of sea water, is also affected. "We observe, as of July 30, the smallest pack ice area ever measured in the Arctic," said Météo France.


https://news.google.com/articles/CAIiEG ... id=FR%3Afr
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izentrop
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Re: Climate, melting ice and sea level




by izentrop » 04/08/19, 05:39

For now, the 2019 melt has caused a sea level increase of 0,65 mm, according to the climatologist, who adds that such anomalies were forecast for 2050 ... with the most pessimistic scenario of the IPCC.
https://www.lci.fr/planete/le-groenland ... 28593.html

We are bad, we are bad ... : Mrgreen:
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eclectron
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Re: Climate, melting ice and sea level




by eclectron » 04/08/19, 07:46

Can we hope that the volume of melted ice will reconstitute this winter?
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whatever.
We will try the 3 posts per day max
moinsdewatt
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Re: Climate, melting ice and sea level




by moinsdewatt » 16/08/19, 12:54

Isère: For the first time, the Deux Alpes ski resort is closed to the public in August

UPDATED 12 / 08 / 19

As a result of this summer's heat peaks, the Deux Alpes glacier trail is closed to skiers for the month of August

It never happened. The glacier which dominates the resort of Deux Alpes, in Isère, has just been closed due to the lack of snow. Usually, tourists can go to the heights until the end of August to ski, but this is no longer possible, report our colleagues from Dauphiné Libéré. The glacier, which rises to 3.600 meters above sea level, is one of the few ski areas open in summer in France.


In question: the two peaks of heat wave of June and July. The director of piste safety in Deux Alpes, Thierry Hugues, explains to France Bleu Isère that "the melting has accelerated compared to the last years". He also notes that the Deux Alpes resort will have counted only 55 opening days this summer, instead of the 80 expected.

For tourists on the spot, their chance to put on their skis has become zero. They can however continue to enjoy the activities offered by the area such as paragliding and mountain biking. If conditions allow, the Deux Alpes glacier should open again for the All Saints holidays.



https://www.google.com/amp/s/m.20minute ... /a/2581987
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Re: Climate, melting ice and sea level




by ENERC » 16/08/19, 19:19

We are on course to beat or equal the record of 2012:
Image
Image
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moinsdewatt
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Re: Climate, melting ice and sea level




by moinsdewatt » 19/08/19, 00:02

Continuation of this post of July 22 which announced. http://www.oleocene.org/phpBB3/viewtopi ... 1#p2285491

Iceland says goodbye to Okjökull, glacier disappeared due to global warming

AFP • 18 / 08 / 2019

While the world experienced its hottest month on record in July, Iceland unveiled a plaque in memory of the Okjökull, the first glacier on the volcanic island to disappear due to global warming, on Sunday. alert opinion.

On the way in the west of Iceland on the kaldidalur (the "cold valley" in French), the panorama alternates between the brown and the gray of the surrounding mountains, the vast desert plains with the tormented relief and the white of the eternal snow of the Langjökull, the second largest glacier in the country - still very much alive.

On the side of the road, a small sign with yellow letters and numbers on a blue background reads: "Ok 1.141 m" and points in the direction of the disappeared glacier and its summit.

Then, a huge cairn, meeting place for a quick speech by the Icelandic Prime Minister, Katrín Jakobsdóttir, and the former United Nations Commissioner for Human Rights Mary Robinson.

"I hope this ceremony will be an inspiration not only for us here in Iceland, but also for the rest of the world because what we are seeing here is just a face of the climate crisis," Katrín said. Jakobsdóttir to AFP.

The ascent begins between the rocks. It was on one of them that Icelandic researchers and Rice University in the United States chose to fix the commemorative plaque inaugurated before an assembly of some hundreds of scientists and many enthusiasts.

The text inscribed on the bronze plaque in Icelandic and English is titled "A Letter for the Future", to raise awareness of the decline of glaciers and the effects of climate change.

"All of our glaciers are expected to meet the same fate over the next 200 years. This monument attests that we know what is happening and what needs to be done. Only you know if we have done it," the plaque tells the address of future generations.

"When you are asked to write something like this, you think in a completely different timescale. It's almost like sending text to the Moon or another planet," says Andri Snær Magnason, the Icelandic writer of 46 years old who is the author of these lines.

The plaque also bears the words "415 ppm CO2", in reference to the record level of carbon dioxide concentration recorded in the atmosphere last May.

"Seeing a disappearing glacier is something that you feel, that you understand and it's quite visual", recognizes Julien Weiss. Professor of aerodynamics at the University of Berlin, he made the express trip with his wife and their 7-year-old son.

"Climate change is not felt on a daily basis, it is something that happens very slowly on a human scale but very quickly on a geological scale."

At this height we can easily observe the crater, its few pockets of azure melt water and its snow remains. Here once lay the thick frozen white coat of the Okjökull.

The very low presence of traces of ice makes even the least initiated understand why the Okjökull has been cut off from the suffix "jökull" meaning "glacier" in Icelandic.

For more than a century this dome-shaped glacier extended over 16 km2 covered with a layer of ice over 50 meters deep. Today it is less than 1 km2.

In 2014 the "Ok glacier", one of the smallest in Iceland, became the first on the island to be downgraded by glaciologists.

Glaciers, which cover about 11% of the country's surface, are distinctive features of the landscapes of this island, which was colonized 1.200 years ago.

"Much of our renewable energy is produced in glacial rivers producing electricity from these glacial rivers," recalls the Icelandic Prime Minister. "This is the reason why the disappearance of glaciers will affect our energy system."

Scientists fear that the island's other 400 or so glaciers will follow the same fate.

The Snæfellsjökull, in the far west of the country and visible from the capital Reykjavík, which inspired the imaginations of writers like Jules Verne for his novel "Journey to the Center of the Earth", is said to be one of the next glaciers in scale to disappear from the middle of the century.

Since 1995, 250 km3 of ice have permanently melted from Icelandic glaciers, or around 7% of their total volume according to a publication by the Icelandic meteorological office in April 2018.


https://www.boursorama.com/actualite-ec ... 21fa4db5e0
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moinsdewatt
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Re: Climate, melting ice and sea level




by moinsdewatt » 15/09/19, 09:42

The largest glacier in the Alps is disappearing before our eyes

13 Sep 2019 futurasciences

The impressive Aletsch Glacier, the largest glacier in the Alps, located in Switzerland in the canton of Valais, could completely disappear by the end of this century if nothing is done to curb global warming, warned Swiss researchers on Thursday. They carried out simulations using advanced techniques to highlight the upheavals that the glacier, with an area of ​​86 km2 and whose mass is estimated at 11 billion tonnes of ice, will undergo, if global warming persists, explained in a press release the Swiss Federal Institute of Technology Zurich (ETH).

Image
Middle part of the glacier with Konkordiaplatz at the bottom,

Some very dismal scenarios

The tongue of the glacier has receded about a kilometer since the turn of the century. Scientists predict that this melting will continue even if the world is able to fulfill the objectives of the Paris climate agreement of 2015 aimed at containing below 2 degrees of global warming compared to pre-industrial levels. Researchers at the Swiss Federal Institute of Technology in Zurich say that even under the most optimistic scenario, the glacier could lose 50% of its volume and length by 2100, while in the worst case, there will be only "two shabby patches of ice" left.

In a previous study, researchers at this university establishment had determined that 90% of the 4.000 or so glaciers in the Alps would have disappeared by 2100 if nothing was done to reduce greenhouse gas emissions. The study released Thursday deals specifically with the Aletsch Glacier. Guillaume Jouvet and Matthias Huss, from the School's hydraulics, hydrology and glaciology laboratory, performed 3D simulations that show the retreat of the glacier according to different scenarios of global warming established for Switzerland.

Inexorable melting even with a stabilized climate
Their 3D models show the dramatic shrinkage of the glacier seen from the peaks of the Eggishorn (2.927 meters above sea level) and the Jungfraujoch (3.466 m) over the next eight decades. The researchers based themselves on three scenarios determined by different concentrations of CO2 in the atmosphere.

Even if the warming is contained below two degrees and the climate stabilized by 2040, it must be assumed that the Aletsch glacier will continue to retreat until the end of the century, said Mr. Jouvet, recalling that the great glaciers react late to climate change.

This means that both "the volume and the length will be reduced by more than half compared to today". But, if in Switzerland, the temperature increases by four to eight degrees by 2100, "an unfavorable scenario but unfortunately perfectly realistic," he added. Only two "miserable patches of ice" will remain. The Konkordiaplatz (see photo above), a vast expanse still covered with a thickness of 800 meters of ice located just behind the Jungfraujoch, will be completely devoid of it, warned Guillaume Jouvet.



https://www.futura-sciences.com/planete ... eux-77575/
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Re: Climate, melting ice and sea level




by Christophe » 17/09/19, 22:53

And another animation of the last years:

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moinsdewatt
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Re: Climate, melting ice and sea level




by moinsdewatt » 21/09/19, 23:04

After Iceland, Switzerland also buries a glacier
A ceremony will be held this weekend to commemorate the Pizol Glacier. Still clearly visible in 2006, it is now part of history


Boris Busslinger September 19, 2019 time. ch

In August, Iceland honored the memory of the Okjökull, its first officially disappeared glacier. The ceremony included the installation of a stele marked with these enigmatic words: “We know what is happening, and we know what we have to do. Only you will know if we did it. ”

Image

2500 kilometers further south, in Switzerland, a similar ceremony is about to take place. The deceased? The Pizol Glacier in St. Gallen. 150 years ago, it covered a large mountain basin, 15 years ago, it was still clearly visible. Today, a large pile of dirty snow remains, no more. At 11 am this Sunday, a small procession will pay homage to the deceased valley tailor. There will be a chaplain, a few activists and Matthias Huss, glaciologist from the EPFZ.

The sadness of the scientist
"It was a bit of my glacier," recalls the latter. A privileged observer of the slow decline of the ice monster, it has measured its thickness since 2006. “I have a personal relationship with this place, its disappearance obviously makes me sad. But as scientists, we saw it coming a long time ago. ”Between 500 and 1000 Swiss glaciers have already disappeared since 1850, recalls the specialist.

Image

"We are not going to organize a ceremony for each tongue of melted ice," he said. But Pizol is well known in the region. We have been observing it since the XNUMXth century, it is a symbol of global warming. ”Organized for a year by several NGOs including Greenpeace, Lenten Action and the Glacier Initiative, the event did not invite politicians. Why be deprived of it during federal elections?

"This is obviously a way of drawing attention to global warming," explains Stefan Salzmann, spokesperson for Action de Carême. But we think that the theme concerns everyone. The stake goes far beyond partisan borders. ”The funeral procession will start at 10:30 am from the Pizol hut.



https://www.letemps.ch/suisse/apres-lis ... un-glacier
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moinsdewatt
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Re: Climate, melting ice and sea level




by moinsdewatt » 23/01/21, 11:47

This video shows us what the Earth would look like if all the ice melted
Julien Claudet July 17, 2017
Today, we invite you to discover a video of nearly 3 minutes, which reveals to us what the Earth would look like if all the ice were to melt. Many cities would be completely swallowed up by the waters, and many continents would see their faces totally transformed.



Rest assured, it's not for tomorrow.
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