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blumenkraft

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Everyone who can must self-isolate.

kassy

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Re: What's new in Antarctica ?
« Reply #551 on: January 13, 2020, 02:31:00 PM »
Mussels could be growing in ANTARCTICA within the next decade as human activity and climate change wreak havoc on the frozen continent's biodiversity


Mussels could be growing in Antarctica in the next ten years thanks to warmer waters caused by climate change and 'increased human activity', researchers claim.

Scientists analysed hundreds of studies to determine which species are 'most likely' to colonise the Antarctic Peninsula Region by 2030.

The British Antarctic Survey created a list of their 13 most concerning species, which features three species of mussel - Common blue, Chilean and Mediterranean.

Others on the list of invasive species include crabs, kelp and buttonweed. 

https://www.dailymail.co.uk/sciencetech/article-7881167/Mussels-growing-ANTARCTICA-decade.html

https://onlinelibrary.wiley.com/doi/full/10.1111/gcb.14938
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kassy

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Re: What's new in Antarctica ?
« Reply #552 on: January 24, 2020, 07:16:45 PM »
Lewis Pugh defies death to swim Antarctic river

Plymouth-born climate activist Lewis Pugh has today completed his most perilous swim to date, swimming for 10 minutes 17 seconds under the East Antarctic ice sheet.

Mr Pugh, 50, who completed the feat wearing nothing more than his swimming trunks, cap and goggles, is calling for the creation of a network of Marine Protected Areas around Antarctica.

...

The extreme conditions of East Antarctica, which holds the record for the Earth’s lowest recorded temperature, ensured that this was the toughest swim of Mr Pugh’s life.

He braved water temperatures barely above freezing and a severe wind-chill factor.

There was also  the constant threat of the glacial river suddenly emptying out though a crack in the ice and dragging him hundreds of metres to the rock bed below.

https://www.plymouthherald.co.uk/news/uk-world-news/lewis-pugh-defies-death-swim-3775031

Pretty crazy stuff...
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Stephan

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Re: What's new in Antarctica ?
« Reply #553 on: January 24, 2020, 08:31:28 PM »
Really pretty crazy.
I hope this type of exercise remains voluntary and not mandatory...  ;)
It is too late just to be concerned about Climate Change

Tom_Mazanec

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Re: What's new in Antarctica ?
« Reply #554 on: January 24, 2020, 09:15:43 PM »
I'm just glad he didn't win the Darwin Award!
SHARKS (CROSSED OUT) MONGEESE (SIC) WITH FRICKIN LASER BEAMS ATTACHED TO THEIR HEADS

HapHazard

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Re: What's new in Antarctica ?
« Reply #555 on: January 24, 2020, 10:41:25 PM »
I'm just glad he didn't win the Darwin Award!
haha Well, it's sort of his thing so not that huge of a deal for him, compared to the rest of us. My friend is also an ice swimmer. He was a last-minute dropout of the 2013 Bering Strait Swim Relay, actually (some poor/unsafe planning caused him to play it safe) and until recently would regularly swim in a local lake (Okanagan) here all winter long. Nuts! But no big deal to him.

Mr. Ä

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Widespread Melt on the George VI Ice Shelf
« Reply #556 on: January 25, 2020, 09:39:27 AM »

gerontocrat

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Re: Widespread Melt on the George VI Ice Shelf
« Reply #557 on: January 25, 2020, 12:48:33 PM »
Widespread Melt on the George VI Ice Shelf

https://earthobservatory.nasa.gov/images/146189/widespread-melt-on-the-george-vi-ice-shelf
There has been record surface melt on the edges of Antarctica since mid-November, that I am speculating is reducing sea ice melt.

I have written about it on the Antarctic Sea Ice Extent thread. Last post @
https://forum.arctic-sea-ice.net/index.php/topic,1759.msg245950.html#msg245950
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philopek

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Re: What's new in Antarctica ?
« Reply #558 on: January 30, 2020, 06:28:31 PM »
For those who like actual imagery i attached a few nice pics that were shot today by an long-standing, since 60 years, friend of mine, along the western coast of the very tip of the antarctic peninsula, South Shetland Islands, Neumayer Channel.

There is more to come if these are received well.

philopek

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Re: What's new in Antarctica ?
« Reply #559 on: January 30, 2020, 06:30:42 PM »
due to the 4 images limit here come 4 more

philopek

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Re: What's new in Antarctica ?
« Reply #560 on: January 30, 2020, 06:31:53 PM »
4 more

philopek

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Re: What's new in Antarctica ?
« Reply #561 on: January 30, 2020, 06:32:16 PM »
and the rest for today

the cutouts are approximate

gerontocrat

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Re: What's new in Antarctica ?
« Reply #562 on: January 30, 2020, 06:33:28 PM »
Keep 'em coming !
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

blumenkraft

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Re: What's new in Antarctica ?
« Reply #563 on: January 30, 2020, 07:08:43 PM »
Yeah, indeed!
Everyone who can must self-isolate.

kassy

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Re: What's new in Antarctica ?
« Reply #564 on: January 30, 2020, 07:09:51 PM »
Although possibly in the pictures thread:
https://forum.arctic-sea-ice.net/index.php/topic,93.0.html

Are all the houses red so it is easier to find them in really bad weather?
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philopek

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Re: What's new in Antarctica ?
« Reply #565 on: January 30, 2020, 08:24:16 PM »
Although possibly in the pictures thread:
https://forum.arctic-sea-ice.net/index.php/topic,93.0.html

Are all the houses red so it is easier to find them in really bad weather?

thanks for linking me, i was really looking for an image thread but my old eyes cheated on my (of course i just didn't look good enough) sorry. Should he send new ones i'll post them there, he promised to do so if the boat won't sink (kidding)

about the house color, i dunno but would make sense.

perhaps one of the "Swedish" users of this forum can tell because "Swedish" and houses in other nordic countries are often painted dark red as well. Often there is a story behind such customs but i simply don't know the correct answer. let's see if someone comes up with one.

gerontocrat

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Re: What's new in Antarctica ?
« Reply #566 on: January 30, 2020, 08:40:39 PM »
Although possibly in the pictures thread:
https://forum.arctic-sea-ice.net/index.php/topic,93.0.html

about the house color, i dunno but would make sense.

perhaps one of the "Swedish" users of this forum can tell because "Swedish" and houses in other nordic countries are often painted dark red as well. Often there is a story behind such customs but i simply don't know the correct answer. let's see if someone comes up with one.
I am English. A long time ago I did some development projects in Africa for the Swedish International Development Agency. They sent me to Sweden to learn Portuguese. They took me to the mine where the copper to make red dye comes from.

Basically, falu red or Falun red is a dye that is commonly used in wooden cottages, barns, and house. The paint's origin is from various copper mines in Sweden. Being the mine at Falun, in the province of Dalarna the most known one. The paint consists of water, rye flour, linseed oil and tailings from the copper mines.
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

kassy

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Re: What's new in Antarctica ?
« Reply #567 on: January 30, 2020, 09:25:14 PM »
They sent me to Sweden to learn Portuguese.

That would freak me out. WTF not just go to Portugal?  :)

From https://en.wikipedia.org/wiki/Falu_red

Quote
In Finland, falu red is known as punamulta ("red earth") in Finnish and rödmylla ("red dirt") in Swedish, after the pigment, which consists of finely divided hematite, iron(III) oxide (Fe2O3). Since the binder is starch, the paint is permeable to water.

...

The pigment historically originated from mines at Falun, in the province of Dalarna. It was a side product of calcination of copper ore. Mixed with linseed oil and rye flour, it was found to form an excellent anti-weathering paint.


Wikipedia says that no one lives there just for the fun of it so these buildings are research related.
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pikaia

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Re: What's new in Antarctica ?
« Reply #568 on: February 07, 2020, 09:59:24 AM »
"Antarctica has logged its hottest temperature on record, with an Argentinian research station thermometer reading 18.3C, beating the previous record by 0.8C."

https://www.theguardian.com/world/2020/feb/07/antarctica-logs-hottest-temperature-on-record-with-a-reading-of-183c

ArcticMelt2

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Re: What's new in Antarctica ?
« Reply #569 on: February 08, 2020, 04:58:24 PM »
The maximum value at the station was +18.4С

https://corporatedispatch.com/antarctica-records-hottest-temperature-ever-18-3-18-4-degrees-celsius/

Quote
However the final maximum was reported to be 18.4°C. 18.3 was a provisional value at 15UTC.

That surpassed the previous record of 63.5 degrees Fahrenheit (17.5 Celsius) set on March 24, 2015 at the same location. Temperature records from Esperanza date back to 1961.


sidd

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Re: What's new in Antarctica ?
« Reply #570 on: February 13, 2020, 08:22:59 AM »
Very nice paper on detecting malt in Antarctica: doi: 10.5194/tc-14-539-2020

Open access.

They use  the Soil Moisture and Ocean Salinity (SMOS) satellite L-band at 1.4 and 19GHz

"the sensitivity of 1.4 GHz signal to liquid water is significantly weaker than at 19 GHz if the water is only present in the uppermost tens of centimetres of the snowpack. Conversely, 1.4 GHz measurements are sensitive to water when spread over at least 1 m and when present in depths up to hundreds of metres. "

I attach figs 2 and 3.

sidd

ShortBrutishNasty

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Re: What's new in Antarctica ?
« Reply #571 on: February 17, 2020, 05:14:26 AM »
Now over 20 grad Celsius?

https://www.sciencealert.com/antarctica-just-smashed-a-new-balmy-heat-record

The thermometer was only 1.5 meters above ground?  Not the normal 2 meters?  The WMO hasn't weighed in on it yet.

How significant is this?

Thanks in advance.
P.S. And feeding trolls??  I'm certainly not the resident bot sabotaging/derailing ASIF on a daily basis with his/its extremely low-effort and largely off-topic post-bombing.  Why do people keep feeding that??

kassy

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Re: What's new in Antarctica ?
« Reply #572 on: February 17, 2020, 01:09:07 PM »
He cautioned that the reading, taken at a monitoring station on an island off the continent's northern tip on February 9, "has no meaning in terms of a climate-change trend," because it is a one-off temperature and not part of a long-term data set.

The 18,4 C above is from a station with a continuous record and this one is not so it is unclear if the temperature is hot for the place or just normal.

Water temperatures near glaciers are much more important.
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kassy

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Re: What's new in Antarctica ?
« Reply #573 on: February 23, 2020, 10:09:52 AM »
Heat wave melts 20% of snow cover from Antarctic island in days

Antarctica's Eagle Island now has a side that's almost ice-free following this month's searing heat wave in the region, images released by NASA show.

Why it maters: "The warm spell caused widespread melting on nearby glaciers," NASA said in its report. It's the third major melt event of the 2019-2020 Southern Hemisphere summer, following warm spells in January and last November, according to the United Nation's World Meteorological Organization (WMO).

Such persistent warmth was not typical in Antarctica until the 21st century, but it has become more common in recent years."
— NASA statement

...

What they're saying: Mauri Pelto, a glaciologist at Nichols College, who observed the warming event as 0.9 square miles of snowpack became saturated with meltwater, said in NASA's report: "I haven’t seen melt ponds develop this quickly in Antarctica. You see these kinds of melt events in Alaska and Greenland, but not usually in Antarctica."


more on:
https://www.axios.com/antarctica-eagle-island-melts-heat-nasa-images-39244722-5909-4723-9227-1100569d66de.html
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kassy

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Re: What's new in Antarctica ?
« Reply #574 on: February 26, 2020, 04:12:38 PM »
Kelp Rafts Are Bringing Invaders to Antarctica

Antarctica is, for the most part, cut off from the rest of the planet by swirling ocean currents, raging winds, and frigid temperatures. The continent’s physical isolation has long been thought to have kept it well protected from invasions of nonnative species. But the discovery of living creatures on kelp rafts in Antarctic waters—including some known to be invasive in other cold regions—shows that the physical barriers are not insurmountable and invasions could become more common as the climate warms.

...

Huw Griffiths, a marine biologist with the British Antarctic Survey, and his colleagues, however, recently collected more than a dozen kelp rafts from the Southern Ocean and the beaches of Antarctic islands. The rafts, which were made of kelp species that are not native to Antarctica, were transporting thousands of other species.

...

One species the scientists found, a tiny colonial animal known as a bryozoan, is particularly worrying. It is known to be a harmful invader in other cold water regions. If it made the jump from a raft to a native kelp, it would encrust the seaweed, cutting off its access to sunlight with potentially devastating consequences. “The local kelp is a major part of the ecosystem, and it may not have defenses against this bryozoan,” says Griffiths.

Even more worrying, he says, is where the bryozoan was found—on Deception Island, in the relatively warm water in the flooded caldera of an active volcano. “It’s one of the easiest places to get a foothold [in Antarctica] because it’s missing all the things that stop animals from getting established” such as the typical deep freeze seen on the mainland, says Griffiths. “From there, invaders would have a chance to adapt and spread.

“For so long we have believed Antarctica was isolated and cut off, but this shows that there are routes in.”

And new oceanographic models explain how: though still a rare occurrence, storms could occasionally push kelp rafts south. And with an estimated 70 million kelp rafts adrift in the Southern Ocean at any time, it’s perhaps not surprising that some have been found washed up on Antarctic beaches.

https://www.hakaimagazine.com/news/kelp-rafts-are-bringing-invaders-to-antarctica/
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IceConcerned

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Re: What's new in Antarctica ?
« Reply #575 on: February 28, 2020, 10:43:44 PM »
I do not know where to post this, but Wilkins ice sheet is showing signs of getting a drumming short term and there is on top of that that eastern crack inland that could expand quite quickly in my mind....

kassy

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Re: What's new in Antarctica ?
« Reply #576 on: March 05, 2020, 04:00:04 PM »
Almost alien: Antarctic subglacial lakes are cold, dark and full of secrets

More than half of the planet's fresh water is in Antarctica. While most of it is frozen in the ice sheets, underneath the ice pools and streams of water flow into one another and into the Southern Ocean surrounding the continent. Understanding the movement of this water, and what is dissolved in it as solutes, reveals how carbon and nutrients from the land may support life in the coastal ocean.

...

Life beneath the ice puts up with a lot -- there is no sunlight and pressure from the ice above in combination with heat radiating up from the Earth's core is what melts the water to form the lake, so the temperature hovers just below freezing. Organic carbon, an important food source for microorganisms, is present in relatively high concentrations in Whillans Subglacial Lake, even if it lacks the verdant mess of a Midwest pond in late August. Instead, as cameras dropped down the borehole of Mercer Subglacial Lake (a neighbor of Whillans) reveal, the subglacial lake is dark, cold, full of soft and fluffy sediment, and lined with bubble-filled ice.

...

Using mass balance calculations, the team's research shows that a pool of dissolved organic carbon in the Whillans Subglacial Lake can be produced in 4.8 to 11.9 years. As the lake fills and drains, which takes about the same amount of time, all those nutrients slip and slide their way to the ice-covered coast of the Southern Ocean. Based on the team's calculations, the subglacial lakes in the region provide 5,400% more organic carbon than what microbial life in the ice-covered ocean downstream needs to survive.

"There's no photosynthesis under the ice in the ocean downstream of this lake -- this limits the available food and energy sources in a way that you wouldn't find in a surface lake or the open ocean," Vick-Majors said. "The idea is that these subglacial lakes that are upstream could provide important sources of energy and nutrients for things living in the ice-covered regions of the Southern Ocean."

https://www.sciencedaily.com/releases/2020/03/200304141410.htm
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kassy

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Re: What's new in Antarctica ?
« Reply #577 on: March 13, 2020, 02:21:38 PM »
Not really something new but interesting:

Why scientists rallied to save a museum of mud

...

Many of these cores, now housed at OSU in Corvallis, Oregon, were dredged up from the bottom of the Antarctic Ocean by researchers at Florida State University in Tallahassee. They form a set called the Antarctic Core Collection, which FSU oversaw for more than 50 years. Four years ago, however, faced with numerous staff retirements and limited lab space, administrators decided the cores needed to be relocated. 

...

The Antarctic Core Collection is the world’s largest stockpile of seafloor sediment from the Southern Ocean. Established in 1963, it includes material from 7,370 Antarctic sites.

....

Today, researchers are using more advanced technologies to reanalyze the old cores. Modern CT scans, for example, allow scientists to take high-resolution, 3-D images of the pebbles in each of the core’s layers. This helps them map when icebergs broke off Antarctica’s ice sheet: More pebbles means an iceberg calved and transported that debris. By examining iceberg movements 3 to 4 million years ago, when temperatures were warmer than today, scientists can study how iceberg calving impacted sea-level rise then, offering insight into what may happen along the coasts now, as the climate warms. “The science people are doing here is really relevant to local problems,” said Maureen Walczak, an assistant professor in oceanography at OSU and advisor for students working with the sediment cores.

...

https://www.hcn.org/issues/52.4/north-scientific-research-why-scientists-rallied-to-save-a-museum-of-mud
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mitch

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Re: What's new in Antarctica ?
« Reply #578 on: March 13, 2020, 09:39:53 PM »
About the Antarctic core collection now at Oregon State University.  It was an archive facility at FSU. Most of the cores were collected off the USNS Eltanin, run by Lamont Doherty Earth Observatory of Columbia University and funded by the National Science Foundation's Office of Polar Programs.  The cores were taken by dropping weighted pipes into the bottom to collect layers of sediments. The ship also did large numbers of water sampling as well as mapping the ocean bottom by geophysical methods.

https://www.ldeo.columbia.edu/research/office-of-marine-operations/history/eltanin

Sigmetnow

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Re: What's new in Antarctica ?
« Reply #579 on: March 14, 2020, 07:44:40 PM »
“Scientists on an 11-day Greenpeace expedition to Antarctica’s Elephant Island to count chinstrap penguin nests found that thousands of penguins are missing. One chinstrap penguin colony has decreased by 77% in nearly 50 years.”

Quote
valeska (@iatemuggles) 3/12/20, 3:45 AM
i smiled i screamed i cried i cheered all in 27 seconds
https://twitter.com/iatemuggles/status/1238008076353110017
Image below, must-watch video at the link. ;)
People who say it cannot be done should not interrupt those who are doing it.

kassy

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Re: What's new in Antarctica ?
« Reply #580 on: March 15, 2020, 05:20:39 PM »
Oh no the penguin nearly drowned.  ::)
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HapHazard

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Re: What's new in Antarctica ?
« Reply #581 on: March 16, 2020, 05:18:36 AM »
OK that made me laugh way more than it should have

thanks kassy :)

interstitial

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Re: What's new in Antarctica ?
« Reply #582 on: March 17, 2020, 11:52:49 PM »
Under the Heading more bad news:


Russia makes move on Antarcticas 513 billion barrels of oil

 >:( :'(
https://oilprice.com/Energy/Crude-Oil/Russia-Makes-Move-On-Antarcticas-513-Billion-Barrels-Of-Oil.html

kassy

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Re: What's new in Antarctica ?
« Reply #583 on: March 23, 2020, 04:42:35 PM »
Happy birthday ice core records!  :)

Forty years of ice-core records of CO2

...

In 1980, a method was found to determine the amount of carbon dioxide in ancient air trapped in polar ice — providing direct evidence that CO2 is coupled to climate, and affects global temperatures in the past, present and future.

The answer to the puzzle came from studies of the chemistry of polar ice. At Grenoble in France, Delmas was researching the acid rain that was decimating northern European forests. Suspecting that the industrial sulfur emissions thought to be responsible might be recorded in Greenland ice, he and his students Michel Legrand and Jean-Marc Ascencio developed a technique7 for measuring ice acidity, adapted to be exceptionally sensitive to impurities and to avoid bias from ambient atmospheric CO2. They discovered that, even without volcanic or human activity, the ice was tinged with sulfuric acid arising from sulfur compounds emitted by plankton. If an ice sample contained carbonaceous dust, melting the ice would allow the background acid to react with the carbonate. This, they thought, might be producing extra CO2 in analyses of ice-core bubbles and confounding the CO2 measurements.

To test their idea, Delmas and colleagues set up a dry-extraction system that avoided melting the ice — instead, the ice was crushed under vacuum in a vessel at –40 °C. They analysed selected samples from two Antarctic ice cores (Dome C and D10), which contained very few carbonates. For ice from the past 10,000 years, they found CO2 levels comparable to then-current atmospheric values (around 300 parts per million; p.p.m.), with good reproducibility. For ice deposited during the last glacial period, around 20,000 years ago, levels were much lower, around 190 p.p.m. (Fig. 2a), thus confirming Arrhenius’s prediction.

...

Last but not least, we know that current atmospheric CO2 levels (407 p.p.m. in 2018; see go.nature.com/2j4heej) are probably unprecedented for the past 800,000 years16.

...

https://www.nature.com/articles/d41586-020-00809-8

A nice general article about the science of ice cores. I never knew this method came from acid rain related research.
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kassy

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Re: What's new in Antarctica ?
« Reply #584 on: March 28, 2020, 01:59:55 PM »
Wollongong biologist's trip to Antarctica to study ancient moss reveals impact of glacier retreat

https://www.abc.net.au/news/2020-03-28/antarctic-moss-adapts-to-climate-change/12093460

Nothing much on the science but has some pictures of King George Island.
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LRC1962

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Re: What's new in Antarctica ?
« Reply #585 on: March 31, 2020, 06:58:43 PM »
"All truth passes through three stages: First, it is ridiculed; Second,  it is violently opposed; and Third, it is accepted as self-evident."
       - Arthur Schopenhauer

kassy

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Re: What's new in Antarctica ?
« Reply #586 on: March 31, 2020, 09:53:58 PM »
Research station in East Antarctica reports its first heatwave

Researchers at the Australian Antarctic Program reported the first recorded heatwave event at the Casey research station in East Antarctica. The event, which took place during the 2019-2020 summer, is likely to have impacted biological systems across the continent and accelerated ice melt.

Heatwaves happen when three consecutive days with both extreme and minimum temperatures are reported. Between January 23rd and 26th, the research station recorded minimum temperatures above zero and maximum above 7.5º (45.5 ºF), with the highest m9.2º C (48.5 ºF), being recorded on the 24th. The highest minimum, 2.5º C (36.5 ºF) was recorded the following morning.

The maximum is 6.9º C (44.4 ºF) higher than average for the station, while the minimum is 0.2º C (32.3 ºF) above average.

more on:
https://www.zmescience.com/science/research-station-in-east-antarctica-heatwave-246243/
Þetta minnismerki er til vitnis um að við vitum hvað er að gerast og hvað þarf að gera. Aðeins þú veist hvort við gerðum eitthvað.