Archives par mot-clé : Antarctic

Climatologists Embarrassed: Increase In Global CO2 Levels Accompanied By Arctic Sea Ice Growth!

by P. Gosselin, July 26, 2022 in NoTricksZone


Today we look at the polar ice caps, which the global warming wingnuts claim is the canary in the coal mine and predicted earlier they’d melt and collapse. For example, Al Gore warned the Arctic ice would disappear by 2014.

While CO2 has gone up, Arctic sea ice has RISEN over past decade

But we have a big surprise. First we examine the Arctic sea ice extent so far this summer. Has it melted away like Al Gore said it would?

Antarctica continues long-term upward sea ice trend

Looking at Antarctica sea ice, we also see a zero-crisis trend when plotting the data from the Japan Meteorological Agency (JMA):

Mass balance of the Antarctic ice sheet 1992–2016: reconciling results from GRACE gravimetry with ICESat, ERS1/2 and Envisat altimetry

by J. Zwally et al., 2021, March 29, in J.of.Glaciology


Abstract

GRACE and ICESat Antarctic mass-balance differences are resolved utilizing their dependencies on corrections for changes in mass and volume of the same underlying mantle material forced by ice-loading changes. Modeled gravimetry corrections are 5.22 times altimetry corrections over East Antarctica (EA) and 4.51 times over West Antarctica (WA), with inferred mantle densities 4.75 and 4.11 g cm−3. Derived sensitivities (Sg, Sa) to bedrock motion enable calculation of motion (δB0) needed to equalize GRACE and ICESat mass changes during 2003–08. For EA, δB0 is −2.2 mm a−1 subsidence with mass matching at 150 Gt a−1, inland WA is −3.5 mm a−1 at 66 Gt a−1, and coastal WA is only −0.35 mm a−1 at −95 Gt a−1. WA subsidence is attributed to low mantle viscosity with faster responses to post-LGM deglaciation and to ice growth during Holocene grounding-line readvance. EA subsidence is attributed to Holocene dynamic thickening. With Antarctic Peninsula loss of −26 Gt a−1, the Antarctic total gain is 95 ± 25 Gt a−1 during 2003–08, compared to 144 ± 61 Gt a−1 from ERS1/2 during 1992–2001. Beginning in 2009, large increases in coastal WA dynamic losses overcame long-term EA and inland WA gains bringing Antarctica close to balance at −12 ± 64 Gt a−1 by 2012–16.

The NOT melting glacier

by T. Ciccone & J. Lehr, May 31, 2022 in CFact

beautiful white icy hill with cave in antarctic

 

Could Antarctica’s ‘Doomsday Glacier’ meet its doom within 3 years?

Time is melting away for one of Antarctica’s biggest glaciers, and its rapid deterioration could end with the ice shelf’s complete collapse in just a few years,” alarmist researchers warned at a virtual press briefing on Dec. 13, 2021 at the annual meeting of the American Geophysical Union (AGU)–a once outstanding professional society, but now a shill for the left.

Above is the first sentence of the article titled Antarctica’s ‘Doomsday Glacier’ could meet its doom within 3 years,not what we would expect to see from a once reputable source, the AGU. It warns us that in a few years, the world’s largest glacier, about the size of Florida, will melt and raise ocean levels by up to 3 meters (about 10 ft). It then tells us that the glacier is melting from below because the surrounding ocean waters have been warmed thanks to human-induced climate change.Finally, it tells us that a team of more than 100 scientists from the USA and the UK have been studying the Thwaites glacier and sharing their findings with scientists worldwide.

The article then explains that the Thwaites is not melting from above, but the melting is coming from below,from the warmed-up oceans that have been warmed by human-made CO2 and the greenhouse effect. The bulk of the article then proceeds to detail the forecasted consequences around the world:

This team may not have even been communicating with each other. Almost a decade earlier, geologists were seeing evidence of volcanoes in a known active tectonic plate boundary, buried under the glacier and the oceans. Before 2017, at least 47 volcanoes were found in western Antarctica and around the area of the Thwaites glacier. In 2017 the Guardian reported that an additional 91 volcanoes had been found along the western shores of Antarctica, with some sitting under the Twaites glacier itself. See the article Scientists discover 91 volcanoes below Antarctic ice sheet.

Claims on the Antarctic Ice Breakup Suffer from Limited History

by A. Watts, Mar 30, 2022 in ClimateRealism


The media was full of disaster headlines this week over an observed breakup of a minor and little-known Antarctic ice shelf. Yahoo News and the New York Times, among others, lamented the “unprecedented” event. The problem is, we don’t really have any knowledge of previous events, making the present day claims false by omission.

 

 

 

During that period the Antarctic sea ice will in fact refreeze just like it does every year. You can be almost certain that if the Glenzer-Conger ice shelf forms again from the fragments and new ice, we won’t see MSM headlines about it because it goes against the “climate change” narrative.

A new volcanic province: an inventory of subglacial volcanoes in West Antarctica

by M. van Wyk et al., May 29, 2017 in LyellSpecPublications


(a) Location of the main components of the West Antarctic Rift System and confirmed volcanoes (red circles: after LeMasurier et al. 1990; Smellie & Edwards 2016). (b) Location of Holocene volcanoes (red circles) in the Ethiopia/Kenya branch of the East African Rift (red shaded area). The majority of this activity is aligned along the rift axis with occasional flank volcanism. Data from Siebert & Simkin (2002) and Global Volcanism Program (2013).

 Abstract

The West Antarctic Ice Sheet overlies the West Antarctic Rift System about which, due to the comprehensive ice cover, we have only limited and sporadic knowledge of volcanic activity and its extent. Improving our understanding of subglacial volcanic activity across the province is important both for helping to constrain how volcanism and rifting may have influenced ice-sheet growth and decay over previous glacial cycles, and in light of concerns over whether enhanced geothermal heat fluxes and subglacial melting may contribute to instability of the West Antarctic Ice Sheet. Here, we use ice-sheet bed-elevation data to locate individual conical edifices protruding upwards into the ice across West Antarctica, and we propose that these edifices represent subglacial volcanoes. We used aeromagnetic, aerogravity, satellite imagery and databases of confirmed volcanoes to support this interpretation. The overall result presented here constitutes a first inventory of West Antarctica’s subglacial volcanism. We identified 138 volcanoes, 91 of which have not previously been identified, and which are widely distributed throughout the deep basins of West Antarctica, but are especially concentrated and orientated along the >3000 km central axis of the West Antarctic Rift System.

Temperature Bottom Falling Out: Antarctica’s Coldest Half-Year Since Measurements Began 60 Years Ago

by P. Gosselin, Nov 9, 2021 in NoTricksZone


Antarctica sets a record cold six month period…Neumayer station sets new winter record low, sees rapid cooling since 2000!

German Die kalte Sonne here features Antarctica’s record cold winter – the coldest since temperature measurements began some 60 years ago.

Coldest April-September period

The Amundsen Scott station at the South Pole recorded a mean temperature of -60.9°C for the April 1 to September 30 period, according to the US National Snow and Ice Data Center (NSIDC). For the June-July-August period, the mean was minus 62.9°C  — the second coldest recorded.

Apparently the 140 or so ppm added CO2 couldn’t trap enough heat to prevent a record cold from being set. The previous record for June-July-August was set in 2004.

Neumayer sets record cold, sees 3°C of cooling since 1985

Die kalte Sonne reports that a record was also set at the German Neumayer Antarctic station, located on the Antarctic coast, which saw a mean June-July-August temperature of -28.6°C.

ANTARCTIC SEA ICE ‘REBOUND’ SURPRISES SCIENTISTS — MSM SILENT

by Cap Allon, Aug 25, 2021 in Electroverse


Just two years ago, many mainstream media outlets declared that sea ice at the South Pole was melting at an “astonishing” rate.

As recently pointed out by notrickszone.com, German national daily Süddeutsche Zeitung reported in June 2019 that Antarctic sea ice had “shrunk 1.8 million square kilometers”, writing: “the massive disappearance of ice is astonishing”.

And while the reporting was technically factual, it has proven to be yet more AGW-driving obfuscation and cherry-picking rather than well-founded indications of a concerning climatic trend.

And now, in 2021, as the ice sharply rebounds, these same MSM outlets have fallen silent–which is speaking volumes…

 

Sea ice at the South Pole has rebounded in 2020 and 2021, to the levels of some 3-decades ago.

Moreover, the trend of the past 40+ years (the satellite era) remains one of significant growth (of approx 1% per decade).

In 2021, Antarctic sea ice is actually tracking well-above the multidecadal average (shown below).

MASSIVE SEA ICE REBOUND GOES UNREPORTED

The climate-ambulance chasing MSM have stopped reporting on the state of the ice across the Southern Hemisphere.

CLASSIC DISINFORMATION TECHNIQUE

“Researchers are in agreement that the decline in Antarctic sea ice from 2016 to 2019 is due to natural causes,” writes Die kalte Sonne. “Obviously this is not a good topic for the Süddeutsche Zeitung, who prefer not to report on the ice recovery.”

Not informing the public about the most recent developments, but instead leaving them with a false impression based on carefully cherry-picked data from two years prior, is a classic disinformation technique that has long been perfected by the activist media.

For more on Antarctica, see:

Antarctic Sea Ice Recovery Surprises Scientists… Classic Disinformation Technique Of Not Reporting

by P. Gosselin, Aug 15, 2021 in NoTricksZone


Just two years ago, many of Germany’s mainstream media outlets declared sea ice at the South Pole was melting at an “astonishing” rate. For example, the left of center, Munich based Süddeutsche Zeitung,

German national daily Süddeutsche Zeitung (above) reported in June, 2019, that Antarctic sea ice had “shrunk 1.8 million square kilometers”, writing: “the massive disappearance of ice is astonishing”.

But many readers here, who are aware of the real data, know nothing of the sort over the long term has happened since satellite measurements began over 40 years ago.

Massive sea ice rebound goes unreported

Today, two years later, German climate science site Die kalte Sonne looks at recent sea ice developments in Antarctica – noting that the climate-ambulance chasing mainstream media like the Süddeutsche Zeitung have since mysteriously stopped reporting on Antarctica. Here’s why:

ANTARCTIC SEA ICE EXTENT LARGEST SINCE 2015, AND GROWING

by Cap Allon, July 14, 2021 in Electrroverse


According to the June, 2021 report recently released by the National Snow and Ice Data Center (NSIDC), it is revealed that the ice locked at Earth’s poles is actually GROWING.

The opening paragraph of the report reads: “Sea ice in the Southern Ocean surrounding Antarctica was well above the 1981 to 2010 average extent in June, rising above the ninetieth percentile near the end of the month”.

But that’s as far as the NSIDC go…

They have plenty to say on the Arctic –which is experiencing its sixth lowest extent on record (big whoop)– but when it comes to Antarctica, I hear nothing but “crickets” — clearly, the icy continent GROWING in mass, and so offsetting the comparatively small losses registered by its northern cousin, is seen as a dampener to the AGW party.

Or perhaps the NSIDC are just letting the data speak for itself:

… it is revealed that Antarctic sea ice extent, as of June 12 (or day 193), is at an impressive 15.808 million square kilometres (6.104 million square miles) — this is the largest extent at this time of year since 2015, and also sees it tracking well-above the 1979-1990 average.

This news, if you’re an alarmist, is surely something to be celebrated.

The icy continent holds 90% of Earth’s freshwater — so, if you’re one of the gullible that have been conditioned to lose sleep over ‘sea level rise’ then this latest datapoint should quell those fears.

Unfortunately though, alarmists selectively ignore ‘good news’ and instead accumulate only bad news–the news that supports their fears, which, thanks to the likes of the IPCC and their MSM lapdogs, is rammed down our collective throats on a daily basis — it is impossible to ignore.

It’s a type of cognitive dissonance, I guess — people are rejecting new information that conflicts with their existing beliefs, even when the new information is positive: this isn’t how science is supposed to work.

Oh, and the NSIDC has more.

Looking at their historical chart which runs back to 1979, an overall trend of growth is shown here, too.

According to the data, ice around the southern pole has been increasing at ≈1 percent per decade:

New Study: A ‘Profound’ ~1°C Cooling Trend Across East Antarctica Since 1979 Is ‘Likely To Accelerate’

by K. Richard, July 12, 2021 in NoTricksZone


Except for a few pockets of warming along the West Antarctic coast, surface air temperatures have cooled profoundly across East Antarctica – most of the continent, as well as the surrounding Southern Ocean – in the last 40 years (1979-2018). About 30% of the cooling can be explained by Madden-Julian Oscillation forcing.

Atmospheric CO2 concentrations rose from 337 ppm in 1979 to 408 ppm in 2018.

But according to graphical illustrations of surface air temperature (SAT) trends from satellite observations documented in a new study (Hsu et al., 2021), nearly the entire continent of Antarctica and much of the surrounding Southern Ocean have undergone about -0.02°C/year (-0.2°C per decade) SAT cooling during this period.

East Antarctica’s temperatures have fallen by about 1°C in the last 40 years, with approximately -0.4°C cooling from 1999-2018 relative to 1979-1998.

Per the authors, one-third of this 40-year cooling trend can be attributed to Madden-Julian Oscillation (MJO) forcing. The MJO influence is “likely to accelerate” the long-term cooling trend for East Antarctica in the coming decades.

Antarctica wasn’t quite as cold during the last ice age as previously thought

by OREGON STATE UNIVERSITY, June 6, 2021 in WUWT


CORVALLIS, Ore. – A study of two methods for reconstructing ancient temperatures has given climate researchers a better understanding of just how cold it was in Antarctica during the last ice age around 20,000 years ago.

Antarctica, the coldest place on Earth today, was even colder during the last ice age. For decades, the leading science suggested ice age temperatures in Antarctica were on average about 9 degrees Celsius cooler than at present.

An international team of scientists, led by Oregon State University’s Christo Buizert, has found that while parts of Antarctica were as cold as 10 degrees below current temperatures, temperatures over central East Antarctica were only 4 to 5 degrees cooler, about half of the previous estimates.

The findings were published this week in Science.

“This is the first conclusive and consistent answer we have for all of Antarctica,” said Buizert, an Oregon State University climate change specialist. “The surprising finding is that the amount of cooling is very different depending on where you are in Antarctica. This pattern of cooling is likely due to changes in the ice sheet elevation that happened between the ice age and today.”

Understanding the planet’s temperature during the last ice age is critical to understanding the transition from a cold to a warm climate and to modeling what might occur as the planet warms as a result of climate change today, said Ed Brook, a paleoclimatologist at OSU and one of the paper’s co-authors.

 …

POLAR CHILL GRIPS NEW ZEALAND + ANTARCTIC SEA ICE EXTENT HOLDING ABOVE 1979-1990 AVERAGE

by Cap Allon, Apr 28, 2021 in Electroverse


Winter is arriving early across New Zealand, particularly in the South Island where well-below average temperatures and even a dusting of out-of-season snow have set in.

A midnight snowstorm delivered a healthy dumping to the Porters Alpine Resort near Castle Hill Tuesday morning, while parts of inland Canterbury and Otago woke to freezing temperatures, down to -3.2C.

The mercury had plunged even further by Wednesday morning, as an Antarctic air mass took charge.

The conditions led to a hard, widespread frost, according to stuff.co.nz, one that stretched from the Canterbury region down to the Lakes District, and beyond.

Lows of -5.1C and -6.4C were registered at Mackenzie Basin and a MetService weather station near Twizel, respectively — also note, Twizel’s low of -6.2C is some 8.8C below the average for the time of year.

Other South Island locales to report freezing temperatures included Lauder, which dropped to -2.7C; Ranfurly with -3.1C; Alexandra with -2.3C; and Mount Cook Village, which registered -1.9C.

A few negative readings were logged in the North Island, too: a weather station near Waiouru dipped down to -0.7C early Wednesday morning.

With regards to the snow, it has for now been restricted to the highest elevations; however, Porters operations manager Blair James believes the recent cold snap –which he says has brought snow and well-below average cold for the past two weeks now– could be an early indicator of a good snowfall season to come.

The below photo was snapped at Mt. Hutt on Wednesday.

The resort, according to @SnowForecast on Twitter, had just received “more pre-season snowfall.”

Antarctic Sea Ice Grows 2 Million Sq. Km – Area As Big As Saudi Arabia. And: Hamburg Spring Arriving Later…

by P. Gosselin, March 28 in NoTricksZone


Antarctic sea ice grows 2 million square kilometers in 4 years…

It’s hard to back up the statement: Global warming is global. Some places have seen warming over the past 40 years (e.g. Arctic), but other places have not.

Antarctica definitely has not been playing along with the man-made global warming hoax. (Yes, man has caused some of the warming, but not all – and it certainly isn’t catastrophic).

Antarctic sea ice surges

Though Antarctic sea ice fell to a “record minimum” in 2017 – after having reached a “record high” in 2015 – the latest data from the National Snow and Ice Data Centershow sea ice at the South Pole has bounced back robustly since, surging some 500,000 sq km above the mean.

On March 26, 2017, Antarctic sea ice measured 3.055 million sq km. Four years later, sea ice reached 5.103 million sq km. That’s a difference of more than 2 million sq. km., which is an area the size of Saudi Arabia!

No way to ignore natural factors

So why would sea ice grow so quickly? If the ice had disappeared, many would blame it on greenhouse gases – absurd of course. And it would be just as absurd to blame the recent gain on global cooling. Obviously there is a complex array of natural factors at work – factors that climate alarmists consistently have ignored over the past decades.

Here’s the March 26, 2021 satellite photo of Antarctica:

Source: NSIDC

False Alarm: IPCC Models Say A Warming Antarctica REDUCES Sea Levels -0.8 Of A Meter By 3000

by K. Richard, March 15, 2021 in NoTricksZone


The IPCC-endorsed anthropogenic global warming (AGW) paradigm finds a warming Antarctica results in more precipitation locked up as ice on the continent. This contributes to reducing sea levels: a -1.2 mm/year−1 mitigation of sea level rise over the next 80 years.

In the 4th IPCC report, Working Group 1 (the physical science) reported that as global temperatures rise,GCMs [models] indicate increasingly positive SMB for the Antarctic Ice Sheet as a whole because of greater accumulation.” This means that by 2100 Antarctica “would contribute 0.4 to 2.0 mm yr−1 of sea level fall.” Over the next 980 years, Antarctica’s ice accumulation will reduce sea levels by nearly a full meter (-0.8 m by 3000).

Antarctica’s Larsen Ice Shelf Break-Up Driven by Geological Heat Flow Not Climate Change

by J.E. Kamis, Jan 19, 2017 in PlateClimatology


 

Figure 1  North tip of Antarctic Continent including Larsen Ice Shelf Outline (black line), very active
West Antarctica Rift / Fault System (red lines), and currently erupting or semi-active volcanoes (red dots).

Progressive bottom melting and break-up of West Antarctica’s seafloor hugging Larsen Ice Shelf is fueled by heat and heated fluid flow from numerous very active geological features, and not climate change.

This ice shelf break-up process has been the focus of an absolute worldwide media frenzy contending man-made atmospheric global warming is at work in the northwest peninsula of Antarctica. As evidence, media articles typically include tightly edited close-up photos of cracks forming on the surface of the Larsen Ice Shelf (Figure 2) accompanied by text laced with global warming alarmist catch phrases. This “advertising / marketing” approach does in fact produce beautiful looking and expertly written articles. However, they lack subsidence, specifically a distinct absence of actual scientific data and observations supporting the purported strong connection to manmade atmospheric global warming.

Working level scientists familiar with, or actually performing research on, the Larsen Ice Shelf utilize an entirely different approach when speaking about or writing about what is fueling this glacial ice break-up. They ascribe the break-up to poorly understood undefined natural forces (see quote below). Unfortunately, comments by these scientists are often buried deep in media articles and never seem to match the alarmist tone of the article’s headline.

“Scientists have been monitoring the rift on the ice shelf for decades. Researchers told NBC News that the calving event was “part of the natural evolution of the ice shelf,” but added there could be a link to changing climate, though they had no direct evidence of it.” (see here)

ANTARCTICA SUFFERING COLDEST JANUARY SINCE 1978 + GLOBAL SEA ICE GROWING EXPONENTIALLY

by Cap Allon, Jan 29, 2021 in Electroverse


The start of 2021 in Antarctica has been an unusually chilly one. In fact, the first half of January has been the coldest since 1978, according to data compiled by @LpdlcRamirez and @peikko763 on Twitter.

As of Jan. 19, the month-to-date temperature anomaly across Antarctic is approx. -0.5C, making this the continents coldest first 3-or-so-weeks of Jan. since 1978 (solar minimum of cycle 20), according to research conducted by @peikko163 on Twitter, who also notes that the Southern Hemisphere as a whole is suffering anomalous January chills not seen since 2012.

But this chill of solar minimum isn’t just confined to the Southern Hemisphere either, the mercury ACROSS the planet is tumbling. In one month global temperatures dropped by a whopping 0.26C: from 0.53C above the 1981-2010 avg. in Nov. 2020 to just 0.27C above the avg. in Dec. 2020 (UAH). This drop was in spite of a warming Arctic–a region expected to “heat” during times of otherwise “global” cooling (more on that below).

The Sun appears to be sliding into its next Grand Solar Minimum cycle–a multidecadal spell of reduced solar output where the solar disc can be devoid of sunspots for months or even years at a time. The result on Earth’s climate will be one of violent swings between extremes due to a weakening of the jet streams: intense bursts of heat will linger in one area, while a teeth-chattering chill will dominate nearby, and then the regions will “switch” — it is this unpredictable chopping and changing that will hasten the failure of our modern food production systems: crops will fail, on a large scale, and famine could quickly ensue.

Overall, Earth’s temperature trends colder during a Grand Solar Minimum, as the Sun’s output sinks lower and lower (increased cloud nucleation being one likely forcing). However, not ALL regions experience the chill: as with the previous GSM (the Maunder Minimum 1645-1715), areas such as the Arctic, Alaska, and S. Greenland/N. Atlantic actually warmed while the rest of the planet cooled — NASA reveals the phenomenon in their Maunder Minimum temperature reconstruction map:

ANTARCTICA SUFFERING COLDEST JANUARY SINCE 1978 + GLOBAL SEA ICE GROWING EXPONENTIALLY

by Cap Allon, Jan 20, 2021 in Electroverse


The start of 2021 in Antarctica has been an unusually chilly one. In fact, the first half of January has been the coldest since 1978, according to data compiled by @LpdlcRamirez and @peikko763 on Twitter.

As of Jan. 19, the month-to-date temperature anomaly across Antarctic is approx. -0.5C, making this the continents coldest first 3-or-so-weeks of Jan. since 1978 (solar minimum of cycle 20), according to research conducted by @peikko163 on Twitter, who also notes that the Southern Hemisphere as a whole is suffering anomalous January chills not seen since 2012.

But this chill of solar minimum isn’t just confined to the Southern Hemisphere either, the mercury ACROSS the planet is tumbling. In one month global temperatures dropped by a whopping 0.26C: from 0.53C above the 1981-2010 avg. in Nov. 2020 to just 0.27C above the avg. in Dec. 2020 (UAH). This drop was in spite of a warming Arctic–a region expected to “heat” during times of otherwise “global” cooling (more on that below).

The Sun appears to be sliding into its next Grand Solar Minimum cycle–a multidecadal spell of reduced solar output where the solar disc can be devoid of sunspots for months or even years at a time. The result on Earth’s climate will be one of violent swings between extremes due to a weakening of the jet streams: intense bursts of heat will linger in one area, while a teeth-chattering chill will dominate nearby, and then the regions will “switch” — it is this unpredictable chopping and changing that will hasten the failure of our modern food production systems: crops will fail, on a large scale, and famine could quickly ensue.

Overall, Earth’s temperature trends colder during a Grand Solar Minimum, as the Sun’s output sinks lower and lower (increased cloud nucleation being one likely forcing). However, not ALL regions experience the chill: as with the previous GSM (the Maunder Minimum 1645-1715), areas such as the Arctic, Alaska, and S. Greenland/N. Atlantic actually warmed while the rest of the planet cooled — NASA reveals the phenomenon in their Maunder Minimum temperature reconstruction map:

Peer-Reviewed Study Confirms Antarctica Has Not Warmed in Last Seven Decades

by P. Homewood, Jan 16, 2021 in NotaLotofPeopleKnowThat


Cancel all the claims by climate activists that global warming is decimating Antarctica. A peer-reviewed study recently published in one of the most prominent science journals destroys one of the most frequently asserted claims by climate activists – that climate change is warming Antarctica and melting the Antarctic ice sheet. The recent study confirms Antarctica has not warmed in the past 70 years and Antarctic ice cover is expanding rather than shrinking.

Writing in the journal Nature, scientists at Columbia University and the University of Victoria, British Columbia report, “The Antarctic continent has not warmed in the last seven decades, despite a monotonic increase in the atmospheric concentration of greenhouse gases.”

 

….

Microplastic pollution in Antarctic waters mirrors rates in North Atlantic and Mediterranean

by E. Quinn, Oct 26, 2020 in EyeOn Arctic


Microplastics have been identified in Antarctic waters at rates that mirror the amounts found in oceans elsewhere in the world, including the North Atlantic, says a new study.

“Although no difference in microplastic abundance was found among regions, the values were much higher in comparison to less remote ecosystems, suggesting that the Antarctic and Southern Ocean deep-sea accumulates higher numbers of microplastic pollution than previously expected,” said the authors in the abstract of the paper “High Abundances of Microplastic Pollution in Deep-Sea Sediments: Evidence from Antarctica and the Southern Ocean,” published Friday in the the journal Environmental Science & Technology.

Waters in three areas around Antarctica were sampled for the study: the Antarctic Peninsula, South Sandwich Islands, and South Georgia.

Levels “surprising”

Microplastic is the term used to describe plastics less than, or equal to 5mm.

The study found that just over one particle of microplastic was found in each gram of sediment in each of the three areas.  This rate of microplastics mirrors the amounts found in other oceans that are considerably closer to human settlements.

“Our research highlights that no matter how remote an ecosystem is, it will still show the artefacts of human influence,” said Mánus Cunningham, a researcher from Queen’s University in Belfast, in a news release.

“We have been dumping plastic into our oceans for roughly 70 years now, so in hindsight this may not be terribly surprising. What is surprising is that the levels of this type of pollution are comparable to what we consider moderately or highly polluted regions of the world’s oceans.”

Atmospheric rivers help create massive holes in Antarctic sea ice

by Rutgers University, Nov 15, 2020 in WUWT


Warm, moist rivers of air in Antarctica play a key role in creating massive holes in sea ice in the Weddell Sea and may influence ocean conditions around the vast continent as well as climate change, according to Rutgers co-authored research.

Scientists studied the role of long, intense plumes of warm, moist air – known as atmospheric rivers – in creating enormous openings in sea ice. They focused on the Weddell Sea region of the Southern Ocean near Antarctica, where these sea ice holes (called polynyas) infrequently develop during the winter. A large hole in this area was first observed in 1973 and a hole developed again in the late winter and early spring of 2017.

IMAGE: A BAND OF CLOUDS IN AN ATMOSPHERIC RIVER EXTENDING FROM SOUTH AMERICA TO THE ANTARCTIC SEA ICE ZONE ON SEPT. 16, 2017. view more CREDIT: NASA

In the first study of its kind, published in the journal Science Advances, scientists found that repeated strong atmospheric rivers during late August through mid-September 2017 played a crucial role in forming the sea ice hole. These rivers brought warm, moist air from the coast of South America to the polar environment, warming the sea ice surface and making it vulnerable to melting.

How to Scare and Deceive without Lying: JPL Cries Wolf about Polar Glacial Melt

by C. Beisner, Nov 6, 2020 in WUWT


Yesterday NASA’s Jet Propulsion Laboratory published “The Anatomy of Glacial Ice Loss.” For the most part it’s an interesting, though not particularly revolutionary, discussion of the various forces that add to and subtract from glacial ice. Nothing wrong with that.

But its authors took the opportunity to insert a poison pill, a little bit of fearmongering, in a video caption:

Did you catch that little trick? “Combined, the two regions also contain enough ice, that if it were to melt all at once, would raise sea levels by nearly 215 feet ….”

Well, yes, but at what rate is the ice from the two regions melting, and at what rate can we, with any confidence, predict they’ll continue to melt, and over what period of time?

There is absolutely no chance of their melting “all at once”—barring, I suppose, Earth’s collision with some enormous asteroid that sends Earth careening into the Sun!

So, how fast is the ice melting?

For Greenland, about 0.1% of its ice mass per decade—1 percent per century.

For Antarctica, about 0.0045% per decade—1% in 2,200 years.

Combined, those contribute to sea-level rise of about 1 mm per year, i.e., 3.94 inches per century.

(See “Lying with Statistics: The National Climate Assessment Falsely Hypes Ice Loss in Greenland and Antarctica.”)

So, if the actual rate is about 3.94 inches (0.3283 foot) per century, how long would it take to raise sea level by 215 feet? The answer: 215 ft. / 0.3283 ft. per century = 654.889 centuries, or 65,488.9 years.

Sea level rise and Antarctica

by Jim Steele, Nov 4, 2020 in WUWT


California’s and other American coastal towns are engaged in divisive arguments regards rising sea levels. Although observed sea levels rose less than 8 inches (0.08 inches per year) since 1900, some modelers forecast much bleaker futures. They predict a 2.4-foot rise for every 1°F rise above preindustrial temperatures, then accelerating to nearly 4.5 feet for every 1°F additional increase. Why a dramatic acceleration in sea level? It’s based primarily on dire models, typically presented to coastal planning commissions as ‘best science’, suggesting increasing ice instability and Antarctica ice sheet collapse. “Antarctica has the potential to contribute more than 3.3 feet of sea-level rise by 2100 and more than 49 feet by 2500.”

Those models have prompted some citizens to argue we must abandon the coasts via managed retreat. Others argue we should build better sea walls. But how high? Others rightfully ask, “how trustworthy are those models?” Model predictions of a collapsing Antarctica ice sheet are not based on observations.  Models of Antarctica’s catastrophic ice collapse are attempts to explain ancient sea levels such as the 30-foot higher levels 120,000 years ago.

There are good reasons toquestion catastrophic models. For one, away from the coast Antarctica’s surface temperatures average −70 °F. Antarctica’s extremely cold surfacesrequire global warming to increase many, many times more before surface glaciers could ever melt. For another, although greenhouse theory predicts increasing CO2  concentrations will raise temperatures, greenhouse theory also predicts added CO2  has a cooling effect on Antarctica (Wijngaarden & Happer 2020, Schmithüsen 2015).

 

NSIDC: 2020 POLAR ICE DOING JUST FINE

by Cap Allon, Oct 24, 2020 in Electroverse


According to the latest October report from the National Snow and Ice Data Center (NSIDC), the ice locked at Earth’s poles is, overall, GROWING.

By volume, Antarctica contains 90% of Earth’s ice, and volume is a far better metric to use when judging the state of an ice sheet than sea ice extent. Extent is prone to wild and unpredictable fluctuations due to natural changes in ocean currents and wind patterns, etc–though these fluctuations are of a much lesser degree in Antarctica than in its northern cousin, the Arctic.

According to the latest NSIDC report, Antarctic sea ice extent reached a whopping 18.95 million square kilometers (7.32 million square miles) on September 28. Mid to late Sept would usually give us the year’s maximum extent, but given the favorable conditions in October, the maximum may well be higher. “As is typical this time of year, there are wide swings caused by winds and storms along the extensive ice edge,” writes the NSIDC.

Ice extent around Antarctica is now “well above the 1981 to 2020 median extent,” the NSIDC informs us. “Ice extent is above the median extent along a broad area off the Wilkes Land coast and western Ross Sea, near the median extent from the Amundsen Sea clockwise to the Weddell Sea and above the median north of Dronning Maud Land, Enderby Land, and the Cosmonaut Sea. The only major area of below the median extent is in the Indian Ocean sector near the Amery Ice Shelf and eastward.”

Continuer la lecture de NSIDC: 2020 POLAR ICE DOING JUST FINE