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global warming

We share the same climate as … the Romans?

What climate alarmists will swear to is a) today’s climate is unprecedented in human history and b) is a result of human action (specifically, industrialization).

But what if these conditions have existed prior to now during another era?  Wouldn’t that put the end to both “a” and “b”?  Well you’d think the Medieval Warm Period would have done that, but alarmists have all but handwaved that away as an “anomaly” if they admit it existed at all.

However, a study has found another era that seems to have shared our climate:

A Swedish study found that the planet was warmer in ancient Roman times and the Middle Ages than today, challenging the mainstream idea that man-made greenhouse gas emissions are the main drivers of global warming.

The study, by scientist Leif Kullman, analyzed 455 “radiocarbon-dated mega-fossils” in the Scandes mountains and found that tree lines for different species of trees were higher during the Roman and Medieval times than they are today. Not only that, but the temperatures were higher as well.

Oh, my.  Those industrialized Romans must have been the blame.  Right?  I mean if you choose to be consistent about your argument, wouldn’t you have to at least consider that as a claim to why the Roman era was even warmer than now (burning that fossil fuel, huh)?  I mean, if you’re sure it is human action leading to the rise in temperatures and, specifically, industrialization?

Yeah, that’d be the logical approach, wouldn’t it?  So this new data (among all the other “new” data that is so roundly ignored by so-called scientists who are pushing the alarmist line) is very inconvenient.  And, in reality, the study points out that 5,000 to 9,000 years ago, without any real human action or industrialization, the global temperature was even higher than it was during the Medieval Warm Period and the Roman era:

“Historical tree line positions are viewed in relation to early 21st century equivalents, and indicate that tree line elevations attained during the past century and in association with modern climate warming are highly unusual, but not unique, phenomena from the perspective of the past 4,800 years,” Kullman found. “Prior to that, the pine tree line (and summer temperatures) was consistently higher than present, as it was also during the Roman and Medieval periods.”

Kullman also wrote that “summer temperatures during the early Holocene thermal optimum may have been 2.3°C higher than present.” The “Holocene thermal optimum was a warm period that occurred between 9,000 and 5,000 years ago. This warm period was followed by a gradual cooling period.”

According to Kullman, the temperature spikes were during the Roman and Medieval warming periods “were succeeded by a distinct tree line/temperature dip, broadly corresponding to the Little Ice Age.”

So what’s a skeptic to do when he see’s this data which directly contradicts the alarmist claims?

That’s easy … remain very skeptical of the “science” underlying the alarmist nonsense and make sure that politicians don’t try to cash in on bad science by taxing you for something that just isn’t your problem.


Blaming Typhoon Haiyan on climate change – no surprise there

First, let me say my heart goes out to the people of the Philippines. This was a horrific and very deadly event. And I can even understand their representative to the UN letting emotion carry the day when he said before the UN:

“What my country is going through as a result of this extreme climate event is madness.

“We can fix this. We can stop this madness. Right now, right here.

Well, emotion aside, no we can’t. As Bjorn Lomborg has said any number of times, the cost of doing what those who want to “stop this madness” want done would literally end life as we know it, ruin economies and yield, at best, marginal results. Or said another way, we can’t afford their desired programs and even if we could, they wouldn’t have much effect.

Then there is the reality of the day. Right now, for instance, carbon emissions in the US are at 1994 levels (and have dropped in most places around the globe due to the downturn in the global economy). Then there’s the inconvenient fact that warming around the globe has paused for ten years and some climate scientists say it may stay paused for another 2o years. And your guess is likely as good as theirs as to what the climate will do then. Oh, and arctic ice?  Back with a vengeance.  It is hard, in the middle of possible 30 year pause in warming, to claim a single event has been caused by … warming. But someone always will.

Finally, look on this side of the globe. Hurricanes and tornadoes are down – a lot:

Summer is almost over, and as of Tuesday morning, not a single hurricane had formed this year. Tornado activity in 2013 is also down around record low levels, while heat waves are fewer and milder than last year, according to the National Oceanic and Atmospheric Administration.

Meteorologists credit luck, shifts in the high-altitude jet stream, African winds and dust.

So it is possible that the “local” weather, in this case “local” is a rather relative term, in our tropics was cooler than the weather in the tropical region of the Philippines.  Luck or the way the climate works?  Is that something man has control over? Or, is it something that an increasing number of scientists seem to be concluding – that various “local” climatic events have more say over our weather than does CO2?

Since I don’t accept the science is settled on this issue, I think we have a lot to still learn about our climate and how it works and what effects it. To this point, I’m not convinced that a single trace gas that, until recently science said was a lagging indicator of warming, is not the culprit that spawns super storms like Haiyan.


The “pause” that could last 20 more years

Even though the “consensus” described in the IPCC report says it won’t. Gee, who to believe – the IPCC who has been badly off the mark since it began reporting or other scientists who actually research the climate, like Prof. Judith Curry from Georgia Tech?

The 17-year pause in global warming is likely to last into the 2030s and the Arctic sea ice has already started to recover, according to new research.

A paper in the peer-reviewed journal Climate Dynamics – by Professor Judith Curry of the Georgia Institute of Technology and Dr Marcia Wyatt – amounts to a stunning challenge to climate science orthodoxy.

Not only does it explain the unexpected pause, it suggests that the scientific majority – whose views are represented by the UN Intergovernmental Panel on Climate Change (IPCC) – have underestimated the role of natural cycles and exaggerated that of greenhouse gases.

Yeah, I’ll go with Prof. Curry if you don’t mind.

My favorite line from the article is one of vast understatement:

The research comes amid mounting evidence that the computer models on which the IPCC based the gloomy forecasts of a rapidly warming planet in its latest report, published in September, are diverging widely from reality.

You think!? They haven’t been close to correct for years. In fact, they can’t even recreate the past with any fidelity. Here’s the reality:

The pause means there has been no statistically significant increase in world average surface temperatures since the beginning of 1997, despite the models’ projection of a steeply rising trend.

According to Dr Hawkins, the divergence is now so great that the world’s climate is cooler than what the models collectively predicted with ‘five to 95 per cent certainty’.

Curry and Wyatt say they have identified a climatic ‘stadium wave’ – the phenomenon known in Britain as a Mexican wave, in which the crowd at a stadium stand and sit so that a wave seems to circle the audience.

In similar fashion, a number of cycles in the temperature of air and oceans, and the level of Arctic ice, take place across the Northern hemisphere over decades. Curry and Wyatt say there is evidence of this going back at least 300 years.

According to Curry and Wyatt, the theory may explain both the warming pause and why the computer models did not forecast it.

It also means that a large proportion of the warming that did occur in the years before the pause was due not to greenhouse gas emissions, but to the same cyclical wave.

‘The stadium wave signal predicts that the current pause in global warming could extend into the 2030s,’ said Wyatt. This is in sharp contrast with the IPCC’s report, which predicts warming of between 0.3 and 0.7C by 2035.

Wyatt added: ‘The stadium wave forecasts that sea ice will recover from its recent minimum.’ The record low seen in 2012, followed by the large increase in 2013, is consistent with the theory, she said.

So now we have a viable theory that doesn’t rely on forced and fudged numbers (or hiding the decline) and has a history of at least 300 years.

I imagine the “chicken little” crowd will ignore it as they ignore all studies that refute or at least question their insistence that man is the cause of any warming going on. After all, if they don’t, if they admit their wrong, how in the world can government use their power of taxation to literally create revenue out of thin air?

Of course they can’t. So they’ll ignore the new science and resort to calling those who are doing it and supporting it “deniers”, demonize them as ignorant neanderthals all the while conspiring to pass laws to relieve you of your money in the name of saving the world.  This isn’t about science.

Just watch.


Tired of shutdown talk – let’s hit global warming, shall we?

This is sure to make the followers of the religion of climate alarmism froth and scream:

A prominent climate scientist says the earth actually faces a global cooling crisis on the eve of the Intergovernmental Panel on Climate Change’s (IPCC) release of its latest climate change report.
David Archibald, an Australian scientist and visiting fellow at the The Institute of World Politics (IWP) in Washington, D.C., said during an IWP presentation Wednesday that contrary to a perceived consensus among the scientific community, the planet’s climate is not warming. Global temperatures have essentially remained flat in the last thirty years, he said.

While temperatures have increased by a modest 0.8 degrees Celsius in the last 150 years, that rise is unremarkable compared to previous increases in earth’s history, he said. Temperature spikes have occurred for hundreds of thousands of years and were slightly higher in the Roman Empire and Medieval periods, he added, according to a Swedish study and data from ice cores in Vostok, Antarctica.

Additionally, about 80 percent of the warming that has occurred can be attributed to water vapor compared to about 10 percent for carbon dioxide, said Archibald. The IPCC’s report, scheduled for release Friday, is expected to state with 95 percent certainty that greenhouse-gas emissions generated by humans are responsible for 20th century warming.

“The IPCC models have failed,” Archibald said, adding that meetings like the 2009 United Nations Climate Change Conference in Copenhagen, Denmark are “hilarious.”

Indeed they are.  In fact, word has it that the newest IPCC report simply ignores the lack of warming the last 15 years.  That’s one way to hide the decline, isn’t it?

Archibald pretty much calls this what it is, ‘hilarious’.  Except that the politicians see a revenue angle, and that makes it much less hilarious and much more likely to see government’s hand in our wallet to address an invented crisis. So they cling to the myth of this religion.

Speaking of the alarmist fundies, how sad is this?

A meteorologist who has covered weather for the Wall Street Journal tweeted that he has decided not to have children in order to leave a lighter carbon footprint, and is considering having a vasectomy.

He also vowed to stop flying after the world’s recent climate-change report made him cry.

Eric Holthaus was reacting to the findings from the Intergovernmental Panel on Climate Change which released a report on Friday that found it was ‘extremely likely’ that humans are causing warming trends seen in the last several decades.

On Friday afternoon the weatherman tweeted: ‘No children, happy to go extinct, which in and of itself, carries a certain sadness. #IPCC’

His next tweet said: ‘Its a very emotional decision. Mixed feelings. adios babies?’

According to another tweet from Holthaus, the Dutch artist known as Tinkebell, who calls attention to animal rights issues through works that use the remains of dead animals, had herself sterilised last week for a similar reason.

My goodness.  Frankly I wish more like him would opt for the “Holthaus solution”.

Al?!  Al Gore?!  Are you listening?

As for the religious aspects of alarmism, think about it:

Saying the science is settled is demanding what religions demand, that you have faith.

Religion has ritual. Global warming alarmism has recycling and Earth Day celebrations.

Some religions persecute heretics. Some global warming alarmists identify “denialists” and liken them to Holocaust deniers.

Religions build grand places of worship. Global warming alarmists promote the construction of windmills and solar farms that produce uneconomic and intermittent electricity.

Global warming alarmism even has indulgences like the ones Martin Luther protested. You can buy carbon offsets to gain forgiveness for travel on carbon-emitting private jet aircraft.

Some religions ban vulgar pleasures, like the New England Puritan sumptuary laws banning luxuries. Some global warming alarmists want to force most Americans out of big-lawn suburbs into high-rise apartments clustered around mass transit stations.

This last element seems to be dominant among many global warming alarmists. Stop the vulgar masses from living their tacky lifestyles driving those horrid SUVs. They must be made to repent, conform and be saved.

I’ll be glad when this particular eco-religion finally is tossed in the dust bin of history where it belongs.

Of course, there’ll be another one close on its heels, you can count on that, and the same “true believers” will be duped into climbing on to its bandwagon, because essentially they’re doomsdayers and this is what they do with their pathetic lives.

[HT: Moonbattery]


Meanwhile in climate alarmist land, not such good news …

Nonetheless we’ll hear the usual suspects try to claim “scientific consensus” when the UN issues its next IPCC report.  But in reality:

The Northwest Passage from the Atlantic to the Pacific has remained blocked by pack-ice all year. More than 20 yachts that had planned to sail it have been left ice-bound and a cruise ship attempting the route was forced to turn back.

Some eminent scientists now believe the world is heading for a period of cooling that will not end until the middle of this century – a process that would expose computer forecasts of imminent catastrophic warming as dangerously misleading.

The disclosure comes 11 months after The Mail on Sunday triggered intense political and scientific debate by revealing that global warming has ‘paused’ since the beginning of 1997 – an event that the computer models used by climate experts failed to predict.

In March, this newspaper further revealed that temperatures are about to drop below the level that the models forecast with ‘90 per cent certainty’.
The pause – which has now been accepted as real by every major climate research centre – is important, because the models’ predictions of ever-increasing global temperatures have made many of the world’s economies divert billions of pounds into ‘green’ measures to counter climate change.

Those predictions now appear gravely flawed.

“Gravely flawed”? Boy, there’s an understatement. If you need a picture, this might help:

Oh, and speaking of predictions, don’t forget this one:

The rebound from 2012’s record low comes six years after the BBC reported that global warming would leave the Arctic ice-free in summer by 2013.

Uh, huh.


“Global Warming” shadenfreude

When irony won’t do:

It’s not easy being green these days, especially if you’re a die-hard doomsayer of the global warming persuasion. In perhaps the cruelest blow of all, the believers learned just this week — in a study released by the National Opinion Research Center at Barack Obama’s University of Chicago no less — that the skeptics haven’t been marginalized as science-denying ignoramuses all these years. To the contrary, unbeknownst to the doomsayers, they themselves have been on the margins of society in their belief that the global warming threat to the planet is the most consequential issue of our times, if not all times.

Those that have attempted to foist this travesty are indeed on the margins. Mainstream thought discounts heavily any of the myriad of doomsday scenarios that the alarmists have been trying to ram down our throats for years:

As documented in painful detail in Public Attitudes towards Climate Change & Other Environmental Issues across Time and Countries, 1993-2010, a 17-year study of attitudes conducted by the International Social Survey Programme (ISSP) in 33 countries, most people in all countries rank global warming way down their list of concerns. In Norway, just 4% considered global warming to be the country’s most important issue — and Norwegians were the most concerned of all of the citizens studied. In Canada, also high up the list, the figure was just 3%; in Great Britain less than 1% and in the U.S. the concern and was less than one half of 1%.

Not surprisingly, in most countries few people even consider global warming — whether or not caused by man — to rise to the level of being extremely dangerous: In Norway, a mere 11.8% of the population fear it, in Great Britain 16.3%, in the U.S. 19.6%. Even in relatively alarmist Canada the great majority take global warming in stride — only 27.8% see it as doom-worthy.

Ice cover in Antarctica is up since 1979 when we first began measuring it by satellite. Disasters are down, with the US “suffering” a drought of land strikes by Cat 3 hurricanes and above. And temperature? Well despite their dire predictions based only on modeling, even the most die-hard alarmists have had to admit we’ve haven’t warmed much at all:

The Holy Grail of proof to most doomsayers, of course, is the temperature, which global warming models insisted would rise in lock-step with increases in carbon dioxide. When the temperatures started to plateau in the late 1990s, doomsayers scoffed at the skeptics who noted that the models failed, taking comfort from the global warming leadership who explained every which way that the skeptics were torturing the statistics to falsely show warming had stopped. Now the leadership itself — the U.K.’s Met Office, NASA’s Jim Hansen, and the IPCC’s Rajendra Pachauri — all admit to temperatures having reached a standstill for the better part of two decades. The lowly global warming believer is left with little but the promises from their leaders that, sooner or later, those temperatures will rise again.

In fact, we found out, it wasn’t skeptics who were “torturing statistics” but the “hide the decline” alarmists.

What we were given, by Al Gore and his like wasn’t science, it was alarmism dressed up as science. It was unproven theory presented as fact. And when science finally had had enough of this claim that consensus proved the alarmist right, they simply dismantled the theory with actual, factual data.

One of the more wonderful bits of fallout? The demise of a once strident voice of the alarmists:

The New York Times is discontinuing the Green blog, which was created to track environmental and energy news and to foster lively discussion of developments in both areas. This change will allow us to direct production resources to other online projects.



Damn global warming!

This … this … this just can’t be!

Antarctica has broken the record for the greatest sea ice extent ever measured at either pole. If current trends continue, the Earth will be completely covered with ice much faster than the climate models predicted.

It has to be nonsense, right?  Is it the Onion?  We all know ice is melting and sea levels are rising … the media tells us so.  And then there’s Al Gore, the voice of reason.  We all know this can’t be true.  Just ask us:

OK, so the floating Arctic ice cap appears to be shrinking. Catastrophe if it goes on, right? As white ice reflects heat into space, past a certain point more and more heat will not be reflected, more and more ice will melt. Past such a “tipping point”, the ice cap would never recover – it would vanish completely, taking with it the ice cover of Greenland which would cause huge rises in sea levels and Biblical flooding worldwide. Not so much, according to the latest research by German climate scientists.

Really?  You mean, the ice isn’t melting?  The world won’t flood?  It’s not getting warmer?

What’s that you say?  You have actual science to back that up?

Real world measurements are the best tools we have at our disposal to monitor what impacts, if any, our use of fossil fuels is having on earth’s climate. Measured temperature increase has stopped for over a decade despite large increases in carbon dioxide. Loss and gain of sea ice in the Arctic is directly tied to cycles of warming and cooling ocean temperatures. Antarctic sea ice is increasing. Antarctic temperature is not increasing. The number of hurricanes around the world is not increasing and the strength of hurricanes worldwide is decreasing.

Antarctica’s temperature is not increasing?  You’ll probably claim sea temperatures haven’t risen either:

Using data from the Climatic Research Unit of the UEA, it appears sea surface temperatures may explain Antarctic Sea Ice at record levels. SST in the southern hemisphere have a cooling trend of -0.068C per decade over the last 15 years.

Oh, my.  The sea has been cooling for all these years?  But what evidence do you have that there’s more ice?

Global average sea levels fell by 5mm last year, presenting an inconvenient fact in a climate change narrative that warns of severe long-term threats to coastal settlements. The 5mm decline was almost twice the rate of the 3mm-a-year average increase recorded over the past 20 years and three times the 130-year average rise rate of 1.7mm a year.

Wow … so how do we hide that decline?

Just askin’

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The “Great Scare” tries to get its second wind

Apparently it’s time to double down on “global warming”:

More than 100 million people will die and global economic growth will be cut by 3.2 percent of gross domestic product (GDP) by 2030 if the world fails to tackle climate change, a report commissioned by 20 governments said on Wednesday.

Of course, if the world, considering the economic position it’s in now, does decide to spend the money it thinks is necessary to do this, my guess is the result will be as bad if not worse. As has been pointed out many times, the effort to “tackle climate change” would require that trillions be spent on containing the human portion (which is tiny) of a trace gas while the natural sources, necessarily, continue on unabated.

Sounds like a brilliant plan, no?

And all of that with absolutely no assurance that it will change anything except the poverty level.  And that will go up markedly.

Then there’s the so-called “science” backing this nonsense.  It has been shredded.  Because it has been shredded, the public’s interest in the scare tactics from the doomsday environmentalists is at a low ebb.  They’re just no buying it.

Finally, there’s nature’s cycles.  Oh, my, nature has cycles?  Yeah, for billions of years.  And the one thing constant about the earth’s climate is change.  That means it is always either getting hotter or cooling off.  Go figure.

All this to say, “here we go again”.  The good news?  No interest, no science to back it all up and most of all, no money.

And yes, that’s good news.


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Ice melt in Greenland exposes different ways media treats the story (Update)

According to the Atlantic’s Rebecca Rosen, Greenland is in the middle of an “extreme ice melt”.  You can read the article and consider the point.  I’ll give her credit.  She reports it pretty objectively including this as a reason for the melt:

NASA says that it is normal for Greenland’s ice to melt a bit in the summer; what is abnormal is the extent. Normally, only about half of the ice sheet’s surface sees any melting. This year, that proportion just about doubled. NASA additionally said that its satellites were recording uncharacteristically high temperatures over the island. Those warmer temperatures were brought by a bubble of warm air (a "heat dome"), the latest in a series of such ridges that have moved over Greenland this year.

In other words, a regional event.

She also mentions:

The last such melt event occurred in 1889, according to data from ice cores, and scientists say they would expect such an event about every 150 years. They’ll be monitoring the ice closely in the years ahead to see if this turns out to be a regular aberration, or an irregular one.

Got it.  Thanks for noting the event which appears to have a history (I’ll cover how much of a history below).

The UK’s Guardian kicks it up a notch with the use of the word “unprecedented” in their title.

“Greenland ice sheet melted at unprecedented rate during July”

No.  It didn’t. As we see from the Atlantic’s treatment,  this event isn’t at all “unprecedented.”  In fact, if I have any gripe about the Atlantic’s coverage is it stopped short of noting a longer history of Greenland’s ice melts:



Greenland, as you can see, has seen periods as warm or warmer than now in its history. One could logically assume then that it would have had the same sorts of weather events during those periods as it experienced during the recent week in early July. 

BTW, here’s an explanation of the numbers you see above:

greenland temp history

“Unprecedented” is obviously a incorrect characterization of the event.  Why did the Guardian seize on the word?
Because some scientist conveniently used it:

However, scientists were still coming to grips with the shocking images on Tuesday. "I think it’s fair to say that this is unprecedented," Jay Zwally, a glaciologist at Nasa’s Goddard Space Flight Center, told the Guardian.

Again, no, it isn’t “unprecedented”.  And obviously the Guardian didn’t take the time to find out if it really was.  A simple Wikipedia check would have produced the above graph.

So why the acceptance of the scientist’s characterization without checking?  I think that too is obvious – it’s scarier than admitting it has a long history of occurring,  many times prior to the industrial revolution.  It lends more immediacy to the story.   The fact that throughout its history Greenland has seen a cycle of warmer and colder weather is “inconvenient” to the scare factor related to AGW.  Certainly the Guardian is careful not to come right out and scream global warming, but by noting this “unprecedented” event, it certainly is clear that global warming, and specifically AGW,  is the dot to which they want you to connect this to.

The NY Times, on the other hand, notes the melt and takes a different approach.  While noting the melt and the high pressure ridge, the Times throws this into the mix:

Nonetheless, the scientists said, the melt was significant because Greenland’s ice sheet is unequivocally shrinking as a result of the warming of the world’s oceans, and the event could help broaden their insights into climate change and earth systems.

While they don’t claim that AGW is the cause for warming oceans (don’t worry, there are plenty of others out there that do), they don’t endeavor to explain why oceans have been warming for the past 100 years.

Here’s a pretty significant clue.  It’s a 2,300 year Hallstatt solar variation cycles graph:


Anyone notice what has been rising for the last 1,000 or so years?

In fact, says Sami Solanki, the director of the Max Planck Institute for Solar System Research in Katlenburg-Lindau, Germany

The sun has been at its strongest over the past 60 years and may now be affecting global temperatures… the brighter sun and higher levels of so-called "greenhouse gases" both contributed to the change in the Earth’s temperature, but it was impossible to say which had the greater impact.

As it is turning out, it appears it may be the Sun.  CO2 has always been a lagging indicator in warming history until it was recently elevated by some “scientists” to a leading cause.  It has not shown the effect on temperature predicted by warmist models, however.  In fact, it hasn’t even been close even while the ppm of CO2 in the atmosphere has continued to rise. 

The point of all of this?  It appears that those traditionally associated with the AGW scaremongering are toning down their rhetoric even while still attempting, through half-truths, incomplete reporting and implication, to push the AGW agenda, albeit much more subtly now. 

Don’t let them get away with it.

UPDATE: And then, of course, there are those who don’t have a clue and don’t care, especially when they can use this to club the GOP.


Twitter: @McQandO

Oxygen isotope ratio cycles support skeptical climate change view

Anthony Watts publishes the following chart over at Watts Up With That:


It has nothing at all to do with CO2 but instead with Oxygen isotopes (O18).  Why is that significant in the climate debate?

Oxygen isotope ratio cycles are cyclical variations in the ratio of the abundance of oxygen with an atomic mass of 18 to the abundance of oxygen with an atomic mass of 16 present in some substances, such as polar ice or calcite in ocean core samples. The ratio is linked to water temperature of ancient oceans, which in turn reflects ancient climates. Cycles in the ratio mirror climate changes in geologic history.

Connection between temperature and climate

The 18O/16O ratio provides a record of ancient water temperature. Water 10 to 15 °C (18 to 27 °F) cooler than present represents glaciation. As colder temperatures spread toward the equator, water vapor rich in 18O preferentially rains out at lower latitudes. The remaining water vapor that condenses over higher latitudes is subsequently rich in 16O.[2]Precipitation and therefore glacial ice contain water with a low 18O content. Since large amounts of 16O water are being stored as glacial ice, the 18O content of oceanic water is high. Water up to 5 °C (9 °F) warmer than today represents an interglacial, when the 18O content of oceanic water is lower. A plot of ancient water temperature over time indicates that climate has varied cyclically, with large cycles and harmonics, or smaller cycles, superimposed on the large ones. This technique has been especially valuable for identifying glacial maxima and minima in the Pleistocene.

Steve McIntyre notes:

Oxygen isotope series are the backbone of deep-time paleoclimate. The canonical 800,000 year comparison of CO2 and temperature uses O18 values from Vostok, Antarctica to estimate temperature. In deep time, O18 values are a real success story: they clearly show changes from the LGM to the Holocene that cohere with glacial moraines.


Given the high reliance on O18 series in deep time, one would think that paleoclimatologists would be extremely interested in a publication of the Law Dome O18 data and be pressuring Tas van Ommen on this point.


But despite the apparent opportunity offered by Law Dome, there has been virtually no technical publication of a high-resolution O18 or delD isotope series.

That’s not to say, however, it wasn’t offered:

On its face, Law Dome, which was screened out by Gergis and Karoly, is an extraordinarily important Holocene site as it is, to my knowledge, the highest-accumulation Holocene site yet known, with accumulation almost 10 times greater than the canonical Vostok site. (Accumulation is directly related to resolution: high accumulation enables high resolution.) The graphic below compares glacier thickness for some prominent sites for three periods: 1500-2000, 1000-1500 and 0-1000. its resolution in the past two millennia is nearly double the resolution of the Greenland GRIP and NGRIP sites that have been the topic of intensive study and publication.


A Climategate email shows that Phil Jones asked about the omission of the Law Dome series from the IPCC illustration in the AR4 First Draft. I asked the same question about the AR4 Second Draft. They realized that the Law Dome graphic had an elevated medieval period and thus, including it in the graphic would – to borrow a phrase from the preparation of AR3 – would “dilute the message” and perhaps provide “fodder to skeptics”.

Why would it “dilute the message” and provide “fodder to skeptics”?  Well look at the chart.  A clearly defined Medieval Warm Period and no hockey stick.

Speaking of “inconvenient truths”.

Much more on the subject here.


Twitter: @McQandO