JoNova

A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).


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Denying 2000 years of the Medieval Warm Period, Little Ice Age on every continent

Here we go again. For five or so years believers didn’t really mention the Medieval Warm Period. Too bruised by the embarrassment of Hockey Stick Zombie failures. But it’s an inconvenient era they have to rub out because none of the expert models can explain what caused it, and it’s hard to panic about same temperatures that Edward the Confessor survived with oxen and carts.

And it’s hard to call the modern warmth “man-made” if nature created something just like it 1,000 years ago.

Climate change: We haven’t experienced anything like this in the past 2,000 years

By Michael Collett, ABC, Environmental Copy and Paste Promoter

Climate scientists writing in the journal Nature have found there is no evidence for “globally coherent warm and cold periods” over the past 2,000 years prior to industrialisation.

That’s significant, because climate change deniers have sometimes pointed to epochs like the so-called “Little Ice Age” or “Medieval Warm Period” to argue that the current global warming is one among multiple similar global climate events.

But what the research actually shows is that other “peak warming and cooling events” over the past two millennia appear to have […]

Antarctica was warmer one thousand years ago — and life was OK

Remember when polar amplification was the rage? So much for that theory

Antarctica is twice the size of the US or Australia. Buried 2 km deep under domes of snow, it holds 58 meters of global sea level to ransom. The IPCC have been predicting its demise-by-climate-change for a decade or two.

A new paper looks at 60 sites across Antarctica, considering everything from ice, lake and marine cores to peat and seal skins. They were particularly interested in the Medieval Warm Period, and researched back to 600AD. During medieval times (1000-1200 AD) they estimate Antarctica as a whole was hotter than it is today. Antarctica was even warmer still — during the dark ages circa 700AD.

Credit to the paper authors: Sebastian Lüning, Mariusz Gałka, and Fritz Vahrenholt

Feast your eyes on the decidedly not unprecedented modern tiny spike:

….

The little jaggy down after 2000 AD is real. While there was rapid warming across Antarctica from 1950-2000, in the last twenty years, that warming has stalled. Just another 14 million square kilometers that the models didn’t predict.

We already knew the Medieval Warm Period was a global phenomenon, thanks to hundreds of proxies, and 6,000 boreholes. But […]

Evil whites caused the Little Ice Age by bringing small-pox to America

Is it April 1st in London?

The BBC is reporting that academics from University College London have discovered that the Little Ice Age was not caused by the record low solar activity of the Maunder Minima, instead it was due to the colonization of the Americas. Thanks mostly to measles and small pox the death toll was so enormous that about 9% of the global population died, supposedly leaving empty farmlands. These were swiftly covered in forests causing a deadly fall in CO2 which cooled the world.

This is an Apocryphal story that virtue signals in so many ways. A kind of triple-point scrabble maneuver combining climate, race, war, forests and imperial colonization in the one story.

The Great Dying of the Indigenous Peoples of the Americas caused the Little Ice Age

Colonisation of the Americas at the end of the 15th Century killed so many people, it disturbed Earth’s climate.

That’s the conclusion of scientists from University College London, UK.

The team says the disruption that followed European settlement led to a huge swathe of abandoned agricultural land being reclaimed by fast-growing trees and other vegetation.

This pulled down enough carbon […]

Worst Storm Ever: Over 8,000 people killed in UK in extreme storm that lasted nine days (in 1703)

Cropped from The Great Storm by Goodwin Sands, 1703

While we soak in storm footage this week, imagine this storm!

Back when CO2 levels were ideal, the UK was hit by a monster nine-day storm: at least 8,000 dead, maybe as many as 15,000 people. Some 2,000 chimney stacks were blown down and 4,000 oak trees were lost in the New Forest alone. About 400 windmills were destroyed, with “the wind driving their wooden gears so fast that some burst into flames”. The worst toll was probably on ships — with some 6,000 sailors thought to be lost. As many as 700 ships were heaped together in the Pool of London, one ship was found 15 miles (24 km) inland. A ship torn from its moorings in the Helford River in Cornwall was blown for 200 miles (320 km) before grounding eight hours later on the Isle of Wight.

Back then, people blamed the “crying sins of the nation” and saw it as punishment by God. The government declared 19 January 1704 a day of fasting, saying that it “loudly calls for the deepest and most solemn humiliation of our people”. Apparently, it remained a topic of preachy […]

Scottish summers not doing anything they haven’t done for 800 years already

Gotta love a long unbroken proxy.

Scientists looked at 44 pines sites across the Scottish Highlands and used their tree rings to create a continuous temperature series for the last 810 years. Showing admirable restraint, they did not paste on adjusted thermometer records to create a hockey stick effect. Instead we can see that Scottish summers were just as warm in the 1300s, the 1280s and around 1500 as well.

The rate of warming is not unprecedented. The temperature is not unusual. But thermometers don’t tell the same story as the tree rings in the last 50 years. They both can’t be right. Either the tree rings are always unreliable thermometers or the thermometers are placed near ice cream trucks and adjusted up-the-kazoo?

Thanks to CO2Science:

Rydval et al. extended “the previously published Scottish dendroclimatic record (Hughes et al., 1984) by nearly 500 years,” in order to create an 810-year-long proxy over the period AD 1200-2010. The reconstruction was derived from a network of 44 Scots pine (Pinus Sylvestris) sites across the Scottish Highlands from both living and subfossil samples that correlated well with summer (July-August) temperatures.

In placing the most recent warming of the instrumental […]

History rewritten, Global Cooling from 1940 – 1970, an 83% consensus, 285 papers being “erased”

The Global Cooling Scare of the 1970s was real, there was a consensus, and it was all over the media. It flies in the face of the man-made warming campaign. After World War II there was a massive industrial escalation in the West. And just as coal fired power was going in everywhere, the world damnwell cooled by -0.3°C. It’s obvious that the modern Climate Witches don’t want people bringing this up.

Where’s that cooling gone? The modern NASA GISS dataset adjusted it away:

What happened to 40 years of cooling from WWII onewards?

That’s the magic of homogenisation.

In 2008, Peterson, Connolley, and Fleck published “The Myth of the 1970s Global Cooling Scientific Consensus” . The Myth paper “found” that from 1965 through 1979, there were only 7 cooling, 20 neutral, and 44 warming papers. It was published in Bulletin of the American Meteorological Society (AMS), showing how pathetically weak the caliber of review is there. Kenneth Richard searched, found and documents 220 papers, not 7 in the same period. He estimates there are probably many more.

The Connolley there is none other than the William Connolly who abused Wikipedia’s editing rules — barred 2,000 other […]

Experts “surprised” to discover what skeptics have known for years: world has been warming for 200 years

For years, skeptical scientists have been pointing at data that showed the the world started warming somewhere from 1700 – 1820. This has been known from glaciers, sea level studies, ice cores, boreholes, ocean heat content estimates, and more proxies than any climate-nerd cares to name.

Finally, expert climate modelers are “surprised” to discover this:

“…their study had detected warming in the Arctic and tropical oceans from around the 1830s, just 80 years after the Industrial Revolution started in England. “It was an extraordinary finding,” she said. “It was one of those moments where science really surprised us. But the results were clear. The climate warming we are witnessing today started about 180 years ago.”

How many grant dollars did it take to figure out what skeptical scientists have been saying for years?

The correlation with global temperatures and actual numerical human emissions is abysmal, so now Abrams et al ignore the numbers and appear to suggest that “The Industrial Revolution” itself started the warming — as if the mere invention of the steam engine heated the world.

[Dr Abram] said the study attributed the gradual warming to an increase in greenhouse gas emissions linked […]

Solar activity was really at exceptional lows during the cold Maunder Minimum

Fig 3 (Part VI only) Sunspot drawing of by G.D. Cassini in 1671 (Oldenburg, 1671c).

What is surprising is just how much data we have on the Sun from 400 years ago.

For some aspects of solar activity we barely have a half a solar cycle. For example, on solar spectral changes: UV and Infrared light swing up and down through the solar cycle, but we only got a good grip on these important changes in the last ten years with the SORCE mission.

But on other aspects of solar activity there is much more long term data than I expected: 400 years ago quite a few people were carefully recording detailed drawings of sun spots (like Cassini in 1671, right). Others were reporting aurorae — up to 150 a year in parish records, newspaper reports, and scientific observations, which tells us something about the strength of the solar wind. There were also observations of the solar corona during eclipses at the time, which suggest the sun was less active as well.

Lately some (Zolotova et al) have said solar activity was not low during the cold Maunder Minimum period from 1645 – 1715. Usoskin and others have responded […]

How do we panic about warming during a maunder-type freeze?

Is this the way the Great Global Warming Scare fades out?

The UK newspapers are full of “Maunder Freeze Coming” as forecast by Ineson et al.[1] Rest assured, the solar-driven-cold is only a local effect, only 0.1C, and only a vague short 20 to 40 winters to come. The Sun, which has been ruled out as a major cause of global warming, is still not a cause of global warming — it’s just a minor technical issue called UV from a local star, which will be affecting an ocean current. Then the Big 6.6 degrees of heatstroke will land upon us.

Britain could be on the verge of a mini Ice Age as the Sun enters a cooler phase, the Met Office warned yesterday.

The last big chill was felt hundreds of years ago when Frost Fairs were held on the frozen River Thames.

However the Met Office said the new freeze will not be enough to cancel out the effects of global warming.

We’ve seen this all before, but not on this scale. If there was a volatility index — like a VIX for climate-PR — it would be setting records. The contradictions […]

Scientific American: black death and slavery cause the little ice age?

Looks like Scientific American has gone a bit “cosmic”: The Little Ice Age was apparently caused by black death, small pox, and slavery. The theory goes that there was a small spikey dip in CO2 levels in 1610, which was man-made. So hold your breath, that means a whole new era should start from then. This small dip of dubious causality, plus the correlation of oddly unclimatic things like slavery, seems to make the spike worthy of an impressive sciencey title, lo, a new era is born — The start of the Anthropocene.

Let’s not mention that temperatures started falling from 1400 AD. That’s 200 years before the CO2 spike down. Cause and effect are so passe in postmodern science.

Mass Deaths in Americas Start New CO2 Epoch

Scientific American:

The atmosphere recorded the mass death, slavery and war that followed 1492. The death by smallpox and warfare of an estimated 50 million native Americans—as well as the enslavement of Africans to work in the newly depopulated Americas—allowed forests to grow in former farmlands. By 1610, the growth of all those trees had sucked enough carbon dioxide out of the sky to cause a drop of at least […]