Posts Tagged ‘Antarctic’

Antarctica


A spot of light reading during the current UK heatwave…how does minus 98 degrees Celsius at Earth’s surface sound? This study of Antarctic data finds that ‘the air needs to be extremely dry to get temperatures this far below zero. Any water vapour in the air tends to heat it up, albeit slightly.’

So cold it would be painful to breathe says ScienceAlert.

Just how cold can it get on Earth? Colder than we thought, apparently. A new study of satellite data reports that valleys in Antarctica’s ice sheets can reach close to minus 100 degrees Celsius (or minus 148 degrees Fahrenheit).

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The edge of the Thwaites glacier [credit: NASA photograph by Jim Yungel]


This BBC report seems unaware that a study in 2014 found that parts of the Thwaites Glacier are subject to melting due to subglacial volcanoes and other geothermal “hotspots”. The existence of this group of volcanoes has long been known.

British and American scientists will assess the stability of one of Antarctica’s biggest ice streams, reports BBC News.

It is going to be one of the biggest projects ever undertaken in Antarctica.

UK and US scientists will lead a five-year effort to examine the stability of the mighty Thwaites Glacier.

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Antarctic sea ice [image credit: BBC]


Another mystery in ‘settled’ climate science. Experts now say they ‘acknowledge that the Antarctic is an important factor in climate change, but still a poorly understood one’. Snowfall is arriving on the land mass while ice is drifting into the sea – as usual in that part of the world. What is needed is accurate data before reaching for the alarm bell.
H/T The GWPF

Previous climate change models predicted that global sea levels would rise by a meter by the year 2100 due in part to melting Antarctic ice, but those estimates have proven to be flawed.

Over the past century, the Antarctic has gone from being a vast Terra Incognita to a continent-sized ticking time bomb: according to NASA, Antarctica has lost “approximately 125 gigatons of ice per year [between 2002 and 2016], causing global sea level to rise by 0.35 millimeters per year.”

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Antarctic sea ice is still expanding [image credit: BBC]


The conclusion offered here is that ‘something must be fundamentally wrong with the climate models, for their predictions to be so far off from the observed sea ice trends’. No wonder climate alarmists focus on the Arctic.

Over the past several years, many researchers have examined the spatial extent of sea ice around Antarctica, says CO2 Science, consistently reporting an increasing trend (see, for example, our reviews on the previously published works of Yuan and Martinson, 2000, Watkins and Simmonds, 2000, Hanna, 2001, Zwally et al., 2002, Vyas et al., 2003, Cavalieri et al., 2003, Liu et al., 2004, Parkinson, 2004, Comiso and Nishio, 2008, Cavalieri and Parkinson, 2008, Turner et al., 2009, Pezza et al., 2012, Reid et al., 2013, Reid et al., 2015, Simmonds, 2015, He et al., 2016 and Comiso et al., 2017).

The latest study to confirm this ongoing expanse comes from the South American research team of De Santis et al. (2017).

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Giant berg mission thwarted by sea-ice

Posted: March 3, 2018 by oldbrew in News, sea ice, Travel
Tags:

Credit: coolantarctica.com


Not the first time something like this has happened, and probably not the last.

The UK-led expedition to the waters around the world’s biggest iceberg is forced to turn around, reports BBC News.
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Scientists have had to abandon their plan to investigate the waters around the world’s biggest iceberg.

The team, led by the British Antarctic Survey, was thwarted in its attempts to reach the massive block known as A-68 by thick sea-ice in the Weddell Sea.

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Antarctica [credit: Wikipedia]


Some parts of the media may try to give a different impression, but El Niño/La Niña events are natural phenomena with a range of consequences.

A new study published Jan. 8 in the journal Nature Geoscience reveals that strong El Niño events can cause significant ice loss in some Antarctic ice shelves while the opposite may occur during strong La Niña events, reports SpaceRef.

El Niño and La Niña are two distinct phases of the El Niño/Southern Oscillation (ENSO), a naturally occurring phenomenon characterized by how water temperatures in the tropical Pacific periodically oscillate between warmer than average during El Niños and cooler during La Niñas.

The research, funded by NASA and the NASA Earth and Space Science Fellowship, provides new insights into how Antarctic ice shelves respond to variability in global ocean and atmospheric conditions.

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A fine day in Antarctica [image credit: BBC]


We’re told: ‘Environmental champion, who was first person to walk to both poles, uses Antarctic trek as green wake-up call.’ But who really needs to be woken up? The polar night means Antarctica is a dead zone for solar power for six months of every year, highlighting the fact that part-time sources of electricity can never be relied upon.

“Thirty years ago, I was the first person in history perhaps stupid enough to walk to the North and South Poles,” renowned British explorer Robert Swan, 61, tells IBTimes UK.

“I had no intention ever in my life of ever walking anywhere cold again – this was definite.”

But that is exactly what he is going to do.

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Don Juan Pond, Antarctica [image credit: NASA]


Researchers plan to camp near this shallow pond for six weeks starting in December, to get detailed measurements of its liquid and explore the local area.

At the base of the Transantarctic Mountains lies a geological oddity, reports Hannah Hickey at UW News.

Don Juan Pond is one of the saltiest bodies of water on the planet, filled with a dense, syrupy brine rich in calcium chloride that can remain liquid to minus 50 degrees Celsius, far below the freezing point of water.

But the source of water and salt to this unusual pond remains a mystery — even as hints emerge that water in a similar form could exist on Mars.

A new University of Washington study uses the pond’s bizarre chemistry to pinpoint the water’s source.

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The head of a turbine is lying on the ground at Australia’s Mawson Antarctic base [image processed by CodeCarvings Piczard]


Flying turbines ahoy! Fossil fuel to the rescue as usual.

The blades of a wind turbine at an Australian Antarctic base broke off and narrowly missed a storage building as they crashed to the ground, reports Phys.org, forcing the icy outpost to switch to backup power.

The head of the turbine, one of two at Mawson station, plunged 30 metres (100 feet) on Tuesday evening, despite there being only moderate gusts of wind at the time.

All 13 members of the expedition at the station are safe, and were inside their living quarters at the time, said Rob Wooding, general manager of support and operations at the base.

The second turbine was deactivated as a precaution, with the base switching to its diesel generators.

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Credit: Environment Canada


Whether this tells us anything about long-term climate trends is not clear, but worth a mention anyway. The report from Phys.org states: ‘Scientists said the smaller ozone hole extent in 2016 and 2017 is due to natural variability and not a signal of rapid healing’.

Measurements from satellites this year showed the hole in Earth’s ozone layer that forms over Antarctica each September was the smallest observed since 1988, scientists from NASA and NOAA announced today.

According to NASA, the ozone hole reached its peak extent on Sept. 11, covering an area about two and a half times the size of the United States – 7.6 million square miles in extent – and then declined through the remainder of September and into October.

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Alaskan permafrost [image credit: insideclimatenews.org]


The idea, so heavily pushed these days, that we are on the brink of ‘hot’ times looks more than a bit weak when compared to some earlier epochs on Earth. Regarding raised CO2 levels, the finding that ‘the most likely source of the carbon [dioxide] came from thawing permafrost during the period studied’ strongly suggests that the thaw would be causing the gas release, not the other way round. Phys.org reporting.

Concentration of carbon dioxide during an intense period of global warmth may have been as low as half the level previously suggested by scientists, according to a new Dartmouth College study.

The study found that carbon dioxide may have been less than 1000 parts per million, or ppm, during the Earth’s early Eocene period. This runs counter to thinking that concentration levels were as high as 2000 ppm in the same time frame.

By comparison, current levels of carbon dioxide observed at NOAA’s Mauna Loa Observatory are around 400 ppm.

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Credit: coolantarctica.com


Another alleged climate alarm looks more like a damp squib, undermined by new research.

Glacier flow at the southern Antarctic Peninsula has increased since the 1990s, but a new study has found the change to be only a third of what was recently reported, says Phys.org.

An international team of researchers, led by the UK Centre for Polar Observation and Modelling at the University of Leeds, are the first to map the change in ice speed. The team collated measurements recorded by five different satellites to track changes in the speed of more than 30 glaciers since 1992.

The findings, published today in Geophysical Research Letters, represent the first detailed assessment of changing glacier flow in Western Palmer Land—the southwestern corner of the Antarctic Peninsula.
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Funny how decades of increasing seasonal sea ice in the Antarctic were ignored or somehow explained away, but a glimmer of a retreat and it’s banner headlines everywhere. Confirmation bias?

Let’s see whether we get a multi-year trend along the same lines in this region. If not it will look like a one-off weather pattern, as seems very possible.

NOT A LOT OF PEOPLE KNOW THAT

By Paul Homewood

http://nsidc.org/data/seaice_index/

While Arctic ice extent has been at low levels lately, coincidentally, strange things have been going on down under.

Bucking the trend of recent years when Antarctic sea ice extent has been steadily rising, it has dropped away in the last few months.

Naturally this has led to the alarmists having a field day. I have, however, used the word “coincidentally” deliberately, as there is no evidence whatsoever that the Arctic and Antarctic events are connected. Or that the latter has anything to do with global warming.

So what has been happening in the Antarctic? NSIDC offer a clue in their October edition of Arctic Sea Ice News, after it reached winter maximum on a record early date:

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What is shrinking – with evidence like this – is the credibility of current IPCC-led global warming theories.

NOT A LOT OF PEOPLE KNOW THAT

By Paul Homewood

h/t Green Sand

image

http://www.telegraph.co.uk/science/2016/11/24/scott-shackleton-logbooks-prove-antarctic-sea-ice-not-shrinking/

An interesting article in the Telegraph:

Antarctic sea ice had barely changed from where it was 100 years ago, scientists have discovered, after pouring over the logbooks of great polar explorers such as Robert Falcon Scott and Ernest Shackleton.

Experts were concerned that ice at the South Pole had declined significantly since the 1950s, which they feared was driven by man-made climate change.

But new analysis suggests that conditions are now virtually identical to when the Terra Nova and Endurance sailed to the continent in the early 1900s, indicating that declines are part of a natural cycle and not the result of global warming.

Scott's ship the Terra Nova

Scott’s ship the Terra Nova

It also explains why sea ice levels in the South Pole have begun to rise again in recent years, a trend which has left climate scientists scratching their heads.

“The missions of Scott and…

View original post 638 more words

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Ah, natural variability – the curse of the fanatical warmist.
They don’t understand it and don’t want to believe it exists.
But it does, so they’ll have to put up with it.

NOT A LOT OF PEOPLE KNOW THAT

By Paul Homewood

image

http://dailycaller.com/2016/08/27/an-inconvenient-truth-few-signs-of-global-warming-in-antarctica/

From the Daily Caller:

Antarctica has confounded scientists, defying the dire predictions of scientists the South Pole would shrink and exacerbate sea level rise in the coming decades.

Climate models predicted Antarctic sea ice would shrink as the world warmed, and that warming would boost snowfall over the southern continent. Neither of those predictions have panned out, and now scientists say “natural variability” is overwhelming human-induced warming.

“Truth is, the science is complex, and that in most places and with most events, natural variability still plays a dominant role, and undoubtedly will continue to do so,” Chip Knappenberger, a climate scientist with the libertarian Cato Institute, told The Daily Caller News Foundation.

“This applies to goings-on in Antarctica as well as in Louisiana,” Knappenberger said, referring to the recent flooding in Louisiana activists have already blamed global warming for.

What recent studies have shown is that…

View original post 856 more words

Credit: NSIDC

Credit: NSIDC


A trifle cynical perhaps, but it shows it’s possible to claim almost anything you want about sea ice observations. Recently NASA was ‘blaming’ the geology for the contrasting polar variations. Now it’s the IPO.
H/T GWPF

The recent trend of increasing Antarctic sea ice extent — seemingly at odds with climate model projections — can largely be explained by a natural climate fluctuation, according to a new study led by the National Center for Atmospheric Research (NCAR).

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Ozone hole over Antarctica (Nov. 2014) [image credit: theozonehole.com]

Ozone hole over Antarctica (Nov. 2014) [image credit: theozonehole.com]


Of course the people behind the CFC ban are patting themselves on the back, but the role of other variables in the atmosphere may have been ignored or overlooked. Extracts from a BBC News report follow.

Researchers say they have found the first clear evidence that the thinning in the ozone layer above Antarctica is starting to heal.

The scientists said that in September 2015 the hole was around 4 million sq km smaller than it was in the year 2000 – an area roughly the size of India.

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Gentoo penguins at Palmer Archipelago, off the Antarctic Peninsula [image credit: Liam Quinn / Wikipedia]

Gentoo penguins at Palmer Archipelago, off the Antarctic Peninsula [image credit: Liam Quinn / Wikipedia]


Looks like Antarctic climate warming scares have gone into a death spiral. What a shame after all those man-made attempts at doom and gloom, and harsh attacks on critics.
H/T GWPF

A group of scientists have just published a study that tries to explain why Antarctica isn’t warming as predicted, and its ice isn’t melting as climate models say it should be.

As Reuters reports, the researchers identified flows of cold, deep water as the primary reason our models are failing down there: A persistent chill in the ocean off Antarctica that defies the global warming blamed for melting Arctic ice at the other end of the planet is caused by cold waters welling up from the depths after hundreds of years, scientists said on Monday.

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Aurora over Antarctica [image credit: spacefellowship.com]

Aurora over Antarctica [image credit: spacefellowship.com]


ScienceDaily reports on the latest advances in understanding how the solar wind interacts with Earth. Note the seasonal aspects and the electric current findings.

A team of National Science Foundation (NSF)-supported researchers at the Virginia Polytechnic Institute and State University (Virginia Tech) discovered new evidence about how Earth’s magnetic field interacts with solar wind, almost as soon as they finished installing six data-collection stations across East Antarctic Plateau last January.

Their findings could have significant effects on our understanding of space weather. Although invisible to the naked eye, space weather can have serious, detrimental effects on modern technological infrastructure, including telecommunications, navigation, and electrical power systems.

The researchers for the first time observed that regardless of the hemisphere or the season, the polar ionosphere is subject to a constant electrical current, produced by pressure changes in the solar wind.

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Antarctic sea ice reached a record maximum extent while the Arctic reached a minimum extent in the ten lowest since satellite records began. Why are these trends going in opposite directions? Credits: NASA Goddard Space Flight Center/Joy Ng

Antarctic sea ice reached a record maximum extent while the Arctic reached a minimum extent in the ten lowest since satellite records began. Why are these trends going in opposite directions?
Credits: NASA Goddard Space Flight Center/Joy Ng


It’s hard not to suspect a politicized element to the results of such a study due to the NASA/NOAA factor. They say Antarctic sea ice has increased ‘just slightly’ since the 1970s but some might put it stronger than that.

Why has the sea ice cover surrounding Antarctica been increasing slightly, in sharp contrast to the drastic loss of sea ice occurring in the Arctic Ocean? A new NASA-led study finds the geology of Antarctica and the Southern Ocean are responsible.

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