Greenland, Antarctica new lands, upheavals

[GuyGadebois]

Global warming as we perceive it is indeed a memetic complex.

A beginning of Alzheimer's Guy?

Certainly.

[izentrop]

I do not believe that the Vikings had so much impact on their environment, simply their mode of operation was at the limit of sustainable and it was enough that a few parameters changed unfavorably for the situation to become untenable: in addition to what I wrote more top, a climatic evolution towards a cooling of the temperatures made completely tilted Erik in the red**!

Palynology (pollen science) shows that the Vikings discovered a country covered with forests, willows and birch trees which they hastened to clear to create pastures. Analysis of the sediments shows that erosion accelerated abruptly upon their arrival, to the point that even the sand present under the topsoil was entrained in the lakes.

Unlike the Inuit, who heated and lit with animal fat, the Norwegians continued to use only wood and peat until the end, aggravating their environmental problems.
The colony changed its diet over time: the pig, poorly adapted to climatic conditions, quickly disappeared from Greenland. For the same reasons, herds of cows are gradually being reduced in favor of sheep and goats that are less greedy in fodder. The adaptation of farming practices is accompanied by an increased use of wild resources as evidenced by the increase in the remains of seals, caribou or birds. Thus, the share of food of marine origin increases from 20%, at the beginning of the occupation, to almost 80% around 1450. On the other hand, they consumed almost no fish, perhaps by taboo food.

The worst solution that we perpetuate today. They got fed up, they left ... https://www.les-crises.fr/le-mythe-du-groenland-vert/ and also https://fr.wikipedia.org/wiki/Histoire_ ... _Groenland

[moinsdewatt]

Climate: in Greenland, the melting of the ice is still accelerating

The island's icecap is melting seven times faster than in the 1990s. The rising waters are likely to drive a billion Earthlings off the coast by the end of the century.

By Ph. L. with AFP December 11, 2019

A new scientific study sheds alarming light on the effects of global warming on rising sea levels. According to the work of 96 specialists from 50 international institutions, the Greenland ice cap has lost 3.800 trillion tonnes of ice since 1993.

The ice sheet that covers this vast island of over 2 million km2 is melting seven times faster than in the 1990s, according to this study published Tuesday by the journal Nature. Melting has increased from 33 billion tonnes per year in the 1990s to 254 billion tonnes per year over the past decade.

According to the study, about half of the melting occurs at the surface, due to the increase in ambient temperatures, and the other half is caused by the rise in ocean temperatures under the glaciers.

Losses peaked at 335 billion tonnes in 2011, before stabilizing around 238 billion tonnes per year (the study focused until 2018). This is a level seven times higher today than in the 1990s.

The global melting already recorded is enough to cause a sea level rise of 10,6 millimeters, according to this work based on satellite surveys, carried out with the support of the European Space Agency (ESA) and the American Agency (Nasa ).

In 2013, the IPCC estimated that the level would rise by 60 centimeters by the end of the century, putting 360 million people at risk in coastal areas. This study rather confirms the “high” scenario of global warming, that is, 7 centimeters more. In September, the UN group of experts put forward a new estimate of one billion people exposed.

For every inch of rising water, 6 million more people exposed
"For every inch of the rise in global sea level, an additional six million people are exposed to flooding in the world's coastal areas," said the study's main co-author, Andrew Shepherd, of the British University of Leeds.

http://www.leparisien.fr/environnement/ ... D-32280599

[jean.caissepas]

2 million methane emission "hot" points in the Arctic Circle ...

https://www.clubic.com/mag/environnemen ... -nasa.html

Don't smoke, it's going to fart!

[GuyGadebois]

Pleasing ...

[moinsdewatt]

The ice-free Arctic Ocean from 2035?

Arctic basin likely to be ice free in summer earlier than expected

by Damien Altendorf, science editor Damien Altendorf, science editor
20 August 2020,

A study focused on the state of the Arctic sea ice during the previous interglacial raises fears of a faster than expected retreat with the current warming. A finding that supports the idea that recent models tend to underestimate the future retreat of Arctic sea ice.

.......

https://sciencepost.fr/le-bassin-arctiq ... que-prevu/

[moinsdewatt]

Arctic sea ice has reached its second smallest area

REUTERS • 21 / 09 / 2020

Observed warming in the Arctic has melted sea ice in proportions that had only occurred once in the previous forty years, scientists said Monday, who see it as a further sign of the speed with which the climate change is altering this region of the globe.

Satellite images show that as of September 15, the sea ice covered only 3,74 million square kilometers.

The lowest mark dates back to 2012, when the sea ice area at that time of the year had declined to 3,41 million kmXNUMX. But the circumstances were specific, cyclones having continued into the season and having dislocated the ice.

This is only the second time in 40 years of observations that the surface area of ​​the sea ice has fallen below 4 million kmXNUMX, underlines the National Snow and Ice Data Center (NSIDC), attached to the University of Colorado in Boulder. "It is clearly appalling but unfortunately not surprising," sums up glaciologist Twila Moon.

Data gathered by NSIDC researchers show that the breakup was particularly rapid between August 31 and September 5 under the effect of a heatwave centered on Siberia. In six days, the pace of the sea ice melted faster than in any other year on record.

As polar ice melts, it releases bodies of open water that absorb solar radiation - when pack ice reflects it back to the atmosphere. This modification amplifies the heating, which is self-sustaining.

This explains why over the past thirty years, temperatures recorded in the Arctic have increased more than twice as fast as in the rest of the world.

The same process is at work with regard to the ice sheet covering the arctic lands of Canada and Greenland, resulting in sea level rise.

https://www.boursorama.com/actualite-ec ... b76095a2e3

[moinsdewatt]

After the minimum summer extension.

http://nsidc.org/data/seaice_index/imag ... series.png

[moinsdewatt]

update. winter maximum passed a few days ago

http://nsidc.org/data/seaice_index/imag ... series.png

[moinsdewatt]

Climate: unprecedented rain fell at the top of Greenland

By LePoint.fr August 20, 2021

A historic event. On Saturday August 14, rain fell for the first time at the summit of Gunnbjørn, that is to say at an altitude of 3 meters, in Greenland, the Summit station of the National Snow and Ice Data Center alerted, reports L'Obs, Friday August 694. In question: record heat for this island in the Arctic Ocean, where the temperature remained above 20 degrees for several hours.

The first drops of rain fell around 5 a.m. (local time) last Saturday and continued to hit the summit for nine hours, until the temperature dropped below zero. In total, 7 billion tonnes of water fell. This rain caused a significant melting of the ice cap. It also affected areas that do not usually melt.

If it had never rained before at the top of Gunnbjørn, in more than a century, this is the fourth time that snow has melted there. Already in July, an episode of ice melting had taken place in Greenland, according to glaciologists. This summer, in the north of the island, the mercury even exceeded local records by more than 20 degrees, according to the Danish meteorological institute DMI relayed by the weekly.

A phenomenon which is likely to recur and which is a bad omen. The IPCC report also recalled that global warming would lead to an increase in precipitation in the world.

https://www.msn.com/fr-fr/actualite/fra ... hp&pc=U531