Archives par mot-clé : Antarctic

Multiple NASA Studies Confirm Bedrock Heat Flow Behind Melting Polar Ice, Not Global Warming

by James E. Kamis, August 7, 2018 in ClimateChangeDisatch


In what amounts to dissension from National Aeronautics and Space Administration (NASA) climate change policy, a series of just-released studies by working-level scientists prove that geological and not atmospheric forces are responsible for melting of Earth’s polar ice sheets.

Volcanic Heat Found Under Antarctica’s Fastest-Melting Glacier

by M.  Bastach, June 28, 2018 in ClimateChangeDispatch


A group of scientists at the University of Rhode Island stumbled on something unexpected when analyzing data brought back from a 2014 expedition to western Antarctica.

Scientists found an abundance of the noble gas Helium-3, indicating there is a volcanic heat source beneath the Pine Island glacier — the fastest melting glacier in the South Pole. The findings were published in a study in the journal Nature Communications.

“When you find helium-3, it’s like a fingerprint for volcanism. We found that it is relatively abundant in the seawater at the Pine Island shelf,” chemical oceanographer Brice Loose, the study’s lead author, said in a statement.

See also here (National Science Foundation) and here

 

Worse than they thought: Antarctica actually colder than scientists once believed

by Anthony Watts, June 25, 2018 in AGU/WUWT


From the AGU and the “but, but, the continent is melting!” department.

COLDEST PLACE ON EARTH IS COLDER THAN SCIENTISTS THOUGHT

WASHINGTON — Tiny valleys near the top of Antarctica’s ice sheet reach temperatures of nearly minus 100 degrees Celsius (minus 148 degrees Fahrenheit) in the winter, a new study finds. The results could change scientists’ understanding of just how low temperatures can get at Earth’s surface, according to the researchers.

Scientists announced in 2013 they had found the lowest temperatures on Earth’s surface: Sensors on several Earth-observing satellites measured temperatures of minus 93 degrees Celsius (minus 135 degrees Fahrenheit) in several spots on the East Antarctic Plateau, a high snowy plateau in central Antarctica that encompasses the South Pole. But the researchers revised that initial study with new data and found the temperatures actually reach minus 98 degrees Celsius (minus 144 degrees Fahrenheit) during the southern polar night, mostly during July and August.

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Study provides less gloom and doom about Antarctica

by Anthony Watts, June 22, 2018 in WUWT


Antarctic ice sheet is melting, but rising bedrock below could slow it down

An international team, led by DTU Space at the Technical University of Denmark with Colorado State University, has found that the bedrock below the remote West Antarctic Ice Sheet is rising much more rapidly than previously thought, in response to ongoing ice melt.

The study, “Observed rapid bedrock uplift in the Amundsen Sea Embayment promotes ice-sheet stability,” reveals new insights on the geology of the region and its interaction with the ice sheet and is published in the journal Science. The authors noted that the findings have important implications in understanding and predicting the stability of the ice sheet and Earth’s rising sea levels.

NASA glaciologist Jay Zwally puts the hammer down: ‘Antarctica is gaining ice’

by Michael Bastach, June 15, 2018 in A. Watts WUWT


A new paper about to be in press, comes at the end of a flurry of papers and reports published this week that claims Antarctica was losing ice mass. Zwally says ice growth is anywhere from 50 gigatons to 200 gigatons a year. NASA glaciologist Jay Zwally says his new study will show, once again, the eastern Antarctic ice sheet is gaining enough ice to offset losses in the west.

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Antarctic Ice Loss Tripled, from near zero to an extremely tiny number! (Nobody mention those volcanoes)

by JoNova, June 15, 2018


Quick — tax the magma

It’s another round of Antarctic Doom about next to nothing. In April Antarctica’s ice was melting five times faster than usual. Now it’s losing ice three times faster in the last five years than the 15 before that! What you won’t hear is how the Antarctic ice cap has 29 million cubic kilometers of ice and has been there for 30 million, mostly warmer, years. You also won’t hear how Antarctica was warmer in Roman Times, or that the  Antarctic Peninsula has cooled by almost 1 degree.

You also won’t hear a word about any volcanoes

The new paper has zero mentions of the word. But other scientists have published plenty of papers describing how the West Antarctic zone is being warmed from below by 1200 degrees of magma. According to scientist Dustin Schroeder and co,  it is as if the Thwaites Glacier in West Antarctic is sitting on a “stovetop burner”.[1]  His words. Thwaites Glacier,, smack in the middle of the warming is being melted from below by geothermal heat. Then there is the large blob of superheated rock 60 miles below West Antarctica. The researchers use the phrase “like a blow-torch”….  Capping it off, only last year 91 new volcanoes were discovered 2km underneath the West Antarctic Rift. That’s new, as in, we didn’t know they were there.

Follow the reasoning, either a trace gas 10 kilometers up is causing some spots of Antarctica to warm and other parts to cool, or hot magma at 1,200C is. What’s more likely?

NSF study: ‘…current carbon dioxide levels are not enough to destabilize the land-based ice on Antarctica’

by Anthony Watts, June 15, 2018 in WUWT


We covered this yesterday, but today the official press release came out, so worth covering again. Via Eurekalert


Land-based portion of massive East Antarctic ice sheet retreated little during past eight million years

But increases in atmospheric carbon dioxide levels could affect stability and potential for sea level rise

NATIONAL SCIENCE FOUNDATION

Large parts of the massive East Antarctic Ice Sheet did not retreat significantly during a time when atmospheric carbon dioxide concentrations were similar to today’s levels, according to a team of researchers funded by the National Science Foundation (NSF). The finding could have significant implications for global sea level rise.

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Japanese Meteorological Agency Corrects Antarctic’s Long-Term Sea Ice Growth Trend Upwards

by P. Gosselin, June 01, 2018 in NoTricksZone


The Global Environment and Marine Department of the Japanese Meteorological Agency recently corrected the long term trend in the annual mean sea ice extent in the Antarctic area: from 0.015 x 106 km2per year to 0.019 x 106 km2 per year on 11 May 2018.

That’s more than a 25% adjustment (15,000 sq. km to 19,000 sq km). So while chunks the size of Manhattans may break off from time to time, about 300 Manhattans of new ice gets added annually.

The report notes that in the Antarctic Ocean: “the annual maximum and annual mean sea ice extents have shown a long-term trend of increase since 1979”.

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Four Decades of Glacier Stability in East Antarctica

by Lovell, A.M. et al., 2017 in CO2Science, May 24, 2018


In describing their findings, Lovell et al. state that “between 1972 and 2013, 36% of glacier termini in the entire study area advanced and 25% of glacier termini retreated, with the remainder showing no discernible change outside of the measurement error (± 66 m or ± 1.6 m yr-1) and classified as ‘no change'” (see figure below). Although there were some regional differences in glacier termini changes,  these regions over the last four decades were more closely linked to non-climatic drivers, such as terminus type and geometry, than any obvious climatic or oceanic forcing.”

See aslo : Terrifying Times For Climate Alarmists

West Antarctic Volcano and Fault Belt Part of ‘Pacific Ring of Fire’

by J.E. Kamis, May 7, 2018 in ClimateChangeDispatch


The inclusion of the here-termed West Antarctic Volcano and Fault Belt into the Pacific Ring of Fire will raise scientific awareness concerning the idea, as per the Plate Climatology Theory, that geologically induced heat flow is the root cause of many anomalous changes in Antarctica’s ecosystems, oceans, climate, and ice masses.

Two More New Papers Document No Warming Trend In Antarctica

by P. Homewood, May 2, 2018 in NotaLotofPeopleKnowThat


For several decades now, Antarctica has not been cooperating with the “global” warming narrative, as the continent as a whole has not been warming.

Several scientific papers have been published recently that document the lack of an anthropogenic warming signal for the Antarctic continent or the surrounding ocean, as well as the dominance of natural variability (…)

Can Humans Melt the Antarctic Icecap?

by Julius Sanks, April 16, 2018 in WUWT


When discussing climate with people who do not have technical backgrounds, I have learned much of the climate discussion is a foreign language to them.

So, I take them through a few examples of how much energy is involved and how miniscule human activity is by comparison. Done properly, this lets a non-STEM person grasp the huge amounts of energy involved.

One of my favorites is Anthony’s essay that debunks the Hiroshima equivalent alarmism:

https://wattsupwiththat.com/2013/06/23/getting-cooked-by-hiroshima-atomic-bomb-global-warming/

New study reveals increased snowfall in Antarctica over last two centuries

British Antarctic Survey, April 9, 2018


Presenting this week (Monday 9 April 2018) at the European Geosciences Union (EGU) meeting in Vienna, an international team, led by British Antarctic Survey, describes how analysis of 79 ice cores collected from across Antarctica reveals a 10% increase in over the last 200 years.  This is equivalent to 272 giga tonnes of water – double the volume of the Dead Sea.

Lead author and ice core scientist Dr Liz Thomas from British Antarctic Survey explains: (…)

 

Antarctic Temperature Data Contradict Global Warming…”Much Warmer” 105 Years Ago!

by P. Gosselin, April 3 , 2018 in NoTricksZone


Despite all the alarmist claims of an Antarctic meltdown, it is well known that the trend for sea ice extent at the South Pole has been one of growing ice rather than shrinking ice over the past 4 decades.

Naturally many factors influence polar sea ice extent, such as weather patterns, winds, ocean currents and sea surface temperature cycles. One factor of course is also surface air temperature, which according to global warming theorists is rising globally (…)

Further Confirmation Southern Ocean Sea Ice is Expanding

by De Santis et al., 2017 in Int.J.RemoteSensing/in CO2Science


Over the past several years, many researchers have examined the spatial extent of sea ice around Antarctica, 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).