Archive for the ‘Natural Variation’ Category

Image credit: NOAA @ Wikipedia]


Two professors question the validity of current climate modelling, pointing to a number of apparent difficulties.

New understanding of ultra-long timescales provides a new take on climate, says The GWPF.
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A newly published paper in the journal Physica A suggests that there is an undiscovered universe all around us that we are too short-lived to perceive.

Authors Prof. Christopher Essex (Applied Mathematics, University of Western Ontario) and Prof. Anastasios Tsonis (Mathematical Sciences, University of Wisconsin-Milwaukee) explain that even without external influences (e.g. man-made carbon dioxide) the weather patterns change over very long timescales, locally and globally.

If some elderly person claims to recall summers, say, that were different when that person was a child, that may not be faulty memory. Just because summers seemed warmer or colder; spring or winter seemed sooner; more or less snow was recalled, it doesn’t follow that the climate system has changed in any meaningful way.

Prof. Essex explains, “Unlike the stable virtual ‘climates’ seen in computer simulations, corresponding real-world conditions aren’t stable at all. There are perpetual, natural, internal changes in play that take longer than human lifetimes to play out.”

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Levee breach on the Mississippi river [image credit: Wikipedia]


This shows once again that glib claims about climate-related flooding due to ‘extreme weather’ should be treated with great caution, or even suspicion. The reality is that other factors are at work.

A new study has revealed for the first time the last 500-year flood history of the Mississippi River, as Eurakalert reports.

It shows a dramatic rise in the size and frequency of extreme floods in the past century — mostly due to projects to straighten, channelize, and bound the river with artificial levees.

The new research, led by scientists at Woods Hole Oceanographic Institution (WHOI), also uncovered a clear pattern over the centuries linking flooding on the Mississippi with natural fluctuations of Pacific and Atlantic Ocean water temperatures.

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The Changing Arctic–Nov 1922

Posted: March 11, 2018 by oldbrew in climate, Natural Variation
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Arctic warming up – 1922 edition. Has climate science got anything to say about it?

NOT A LOT OF PEOPLE KNOW THAT

By Paul Homewood

In 1922, NOAA knew that the Arctic was undergoing a “radical change of climate”, and was “not recognizable” from the climate of 1868 to 1917.

In November that year, NOAA published this chapter in their Monthly Weather Review:

image

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https://journals.ametsoc.org/toc/mwre/50/11

They must have had proper scientists in those days.

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Is this how it works? [image credit: politics.ie]


An obvious problem with studies like this is that as soon as natural climate variation is invoked – to explain the lack of expected warming from so-called greenhouse gases – the argument that such gases could be a dominant factor in climate processes is then severely weakened to say the least. It is in effect an admission that such variations could cause warming as well as cooling. How long can a ‘hiatus’ last before it becomes the status quo?

Reinforcement of Climate Hiatus by Decadal Modulation of Daily Cloud Cycle
– By Jun Yin and Amilcare Porporato, Princeton University
H/T The GWPF

Based on observations and climate model results, it has been suggested that the recent slowdown of global warming trends (climate hiatus), which took place in the early 2000s, might be due to enhanced ocean heat uptake.

Here we suggest an alternative hypothesis which, at least in part, would relate such slowdown to unaccounted energy reflected or re-emitted by clouds.

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Temperatures at the earth’s surface on February 25 at 1200 GMT [image credit: phys.org]


The role of the lowest solar cycle for at least a century is mostly ignored by believers in man-made global warming. There are signs of climate change, but not necessarily the kind they expect.

Not for the first time in recent years, Europe has descended into a deep freeze while the Arctic experiences record high temperatures, leaving scientists to ponder the role global warming may play in turning winter weather upside down, says Phys.org.

The reversal has been dramatic.

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Flooding in Houston from Hurricane Harvey 2017 [image credit: BBC]


This looks like another way of saying nobody can be sure what is natural variation and what – if anything – isn’t, when it comes to rainfall patterns at least. Or if they think they can work something out, it would have to be over a lot longer period than currently available data allows. Result: decision makers must fly blind as Phys.org suggests – probably by making assumptions based on poorly-performing climate models.

New research from The Australian National University (ANU) and ARC Centre of Excellence for Climate System Science suggests natural rainfall variation is so great that it could take a human lifetime for significant climate signals to appear in regional or global rainfall measures.

Even exceptional droughts like those over the Murray Darling Basin (2000-2009) and the 2011 to 2017 Californian drought fit within the natural variations in the long-term precipitation records, according to the statistical method used by the researchers.

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Cold end to February 2018 in Davos


Unusual for the start of March in the UK perhaps, but this looks quite tame compared to forecasts of well below -15C (overnight) for some parts of central Europe.

Forecasters warn of prolonged spell of icy and snowy conditions into early March, reports The Week.

The United Kingdom is bracing for a severe wintry snap in the coming days, as a blast of cold weather dubbed the “Beast from the East” approaches.

The icy conditions are believed to be caused by a weather phenomenon called a “sudden stratospheric warming” above the North Pole, which will drag very cold air from Siberia to the UK as early as next week.

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Image credit: theozonehole.com


‘The salinity puzzle’ – something new for climate theorists to ponder and debate. Here they still refer to ‘heat-trapping’ gases, having ignored or forgotten about convection.

Researchers aboard an Australian ship undertaking pioneering work in the Southern Ocean have found the “first hint” of a shift in a decades-long trend towards fresher, less dense water off Antarctica, reports The Age.

Teams of scientists on the RV Investigator have been profiling the salinity and temperature of water between Tasmania and Antarctica at 108 locations. They also released the first batch of deep Argot floats to measure conditions as deep as 4000 metres.

But it is the early analysis of data on salinity in the so-called bottom waters near the seabed that may stir international debate.

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Another cold day at the Winter Olympics [image credit: weather.com]


Only the wooden spoon for climate propagandists at the coldest Winter Olympics for decades, if not all-time.
H/T The GWPF

The bone-chilling cold and icy winds in Pyeongchang have contributed to any number of wipe-outs for Olympic skiers and snowboarders, not to mention a public-relations face plant for the climate-change movement, says The Washington Times.

Its dire warnings about how the Winter Olympics face an existential threat from global warming have been all but buried by the flurry of reports about frigid conditions at the 2018 games in South Korea, which are expected to set an Olympic record for cold temperatures.

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Well, they may think they do. But once they accept that the Sun can vary its output they have to accept it can vary up or down. If there’s a ‘grand minimum’ then there should be a ‘grand maximum’ (which may have just happened), and all points in between. Claims of ‘human-induced climate change’ have to be weighed against natural variation. The fact that reports like this are starting to appear suggests the writing is on the wall for climate warmists, due to natural factors they used to claim were too trivial to mention.

The sun might emit less radiation by mid-century, giving planet Earth a chance to warm a bit more slowly but not halt the trend of human-induced climate change, says Phys.org.

The cooldown would be the result of what scientists call a grand minimum, a periodic event during which the sun’s magnetism diminishes, sunspots form infrequently, and less ultraviolet radiation makes it to the surface of the planet.

Scientists believe that the event is triggered at irregular intervals by random fluctuations related to the sun’s magnetic field.

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The lead author found it ‘remarkable’ that ‘The results indicate that in present and past the Atlantic Ocean surface currents correlate with rainfall patterns in the Western Hemisphere.’
It turns out that ‘If we go back in increments of 30 [years], we’re well positioned to understand things on the order of centuries.’ Could we call it natural variation perhaps…?

Research conducted at The University of Texas at Austin has found that changes in ocean currents in the Atlantic Ocean influence rainfall in the Western Hemisphere, and that these two systems have been linked for thousands of years, reports Phys.org.

The findings, published on Jan. 26 in Nature Communications, are important because the detailed look into Earth’s past climate and the factors that influenced it could help scientists understand how these same factors may influence our climate today and in the future.

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Image credit: Siberian Times


Claims that everywhere apart from the Eastern USA was warmer than ‘normal’ this winter turn out to be wide of the mark, in parts of Siberia at least.

The thermometer in a remote Siberian village known as the coldest inhabited place on earth has broken as temperatures plunged to near-record depths, reports the Daily Telegraph.

The public device, which was installed in Oymyakon as a tourist attraction, recorded -62C, before malfunctioning this week.

Meanwhile the Siberian Times reports that some locals had readings as low as -67C – in touching distance of the record -67.7C, which was logged in the village in February 1933.

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Arctic Ocean


The researchers believe Saharan air reaching the Arctic was a rare but significant factor in an unusual warming event two years ago.

In the winter of 2015/16, something happened that had never before been seen on this scale: at the end of December, temperatures rose above zero degrees Celsius for several days in parts of the Arctic, reports Phys.org. Temperatures of up to eight degrees were registered north of Svalbard.

Temperatures this high have not been recorded in the winter half of the year since the beginning of systematic measurements at the end of the 1970s. As a result of this unusual warmth, the sea ice began to melt.

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Credit: planetsave.com


H/T The GWPF

Trump was more likely winding up the over-zealous climate alarmists, rather than being confused about anything.

Two weeks ago, President Donald Trump greeted the cold snap that was gripping much of the U.S. by tweeting, “Perhaps we could use a little bit of that good old Global Warming.” He was criticized for confusing weather with climate.

But he’s hardly alone in making this mistake say Peiser and Ridley, as we have seen in coverage of the most destructive weather-related events of 2017.

The past year was filled with bad weather news, much of it tragic, with whole communities even now still struggling to recover.

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Wavy jet stream
[image credit: BBC]


The team say they have found ‘a strong driver of climate extremes in Europe for the last 300 years’, which obviously pre-dates the Industrial Revolution and its ’emissions’ by a wide margin.

Increased fluctuations in the path of the North Atlantic jet stream since the 1960s coincide with more extreme weather events in Europe such as heat waves, droughts, wildfires and flooding, reports a University of Arizona-led team.

The research is the first reconstruction of historical changes in the North Atlantic jet stream prior to the 20th century, reports Phys.org.

By studying tree rings from trees in the British Isles and the northeastern Mediterranean, the team teased out those regions’ late summer weather going back almost 300 years—to 1725.

“We find that the position of the North Atlantic Jet in summer has been a strong driver of climate extremes in Europe for the last 300 years,” Trouet said.

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Image credit: Andrew Holt


Parts of the Alps have seen a return to 1978 weather conditions according to this report, with some places only accessible by helicopter.

Hundreds of roads across the Alps in France, Italy and Switzerland were closed, cutting off resorts and villages, after the kind of snowfall that only comes once every 30 years, as Euronews reports.

Tens of thousands of people have been stranded across the Alps after ‘once-in-a-generation’ weather dumped almost 2 meters of snow on some ski resorts in less than 48 hours.

Schools and nurseries have been closed and roads cut off after the Savoie department in France was placed on red alert – the highest warning for avalanches.

Tignes and Val d’Isere have been in lockdown with tourists and residents confined to the area.

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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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NASA temperature anomaly map (week to 2nd Jan. 2018)


As one university-based climatologist said: ‘Such claims make no sense’. The climate isn’t doing as predicted so far-fetched excuses are produced by climate alarm promoters.

Record snowfall, a “bomb cyclone” and cold Arctic air have once again stirred up the debate over global warming’s impact on winter weather, says Michael Bastasch at The Daily Caller.

Some climate scientists are pointing the finger at manmade global warming as a culprit behind recent wintry weather, but there’s not a lot of evidence or agreement that global warming is currently driving extreme cold and snow.

Penn State University climate scientist Michael Mann authored a blog post for the Climate Reality Project, former Vice President Al Gore’s group, claiming what’s happening is “precisely the sort of extreme winter weather we expect because of climate change.” Mann’s argument is that we can expect more “bomb cyclones” and cold snaps as the planet warms.

But Mann, who often invokes the “consensus” on global warming, seems out of step with the evidence on this issue.

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White winter in the USA


Battered by the bomb cyclone which brought heavy snow and flooding to a swathe of the US, America is facing the threat of the big chill says the Daily Telegraph.

As workers started shovelling away the mountain of snow, temperatures started plunging.

They plummeted to as low as -20C (-4F) in many parts of New England. In Caribou, northern Maine, the wind chill was poised to bring the reading down to -40C (-40F).

According to the National Weather Service, the lowest temperature on Friday, -41C (-42F), was recorded at Embarrass, Minnesota. On the summit of Mount Washington in New Hampshire, forecasters expect the biting winds to make it feel as if it was -100F (-70C).

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What’s in a place name?


Anglo-Saxon England was unusually warm and stormy. Place names coined then could hold clues to how the weather will get wetter and wilder as the climate changes, says Sott.net. Assuming the weather does do that, of course. The author asks: “Is it a surprise that places with watery names are more prone to flooding?”

It’s blowy on the B4380 to Buildwas, writes Richard Webb in the New Scientist. A keen wind whipping across the floodplain from Shrewsbury flaps a misarranged saddle bag strap against my back wheel.

As I cross the river Severn at Atcham, and bend right down the back road past Wroxeter, a black cloud delivers the first dribbles of rain.

England’s place names are a treasure trove of hidden history – if only we could find the key.

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