Tag Archives: globalcooling

My Solar Cycle 25 Amplitude Prediction

Solar Cycle 25 will peak somewhat lower than the current one (SC24) but far higher than the nothingness currently predicted (see here).

Solar cycle record
Solar cycle record

My prediction is based on the fact that predictions are hard especially about the future and doubly especially when they imply a wholesale change compared to the present.

Why AGW Is A Communication Issue

Shub Niggurath has just made the startling (?) discovery that PR people think the problem with AGW not having become a religion for the masses can be solved by…PR people.

Talk about a hammer convinced the whole world is a nail. Or turkeys consensually rejecting the notion of Christmas.

Sarcasm aside, there is a grain of truth even in the most mendacious Desmogblog statement, and so there is here. In fact, “communication” implies a source, a destination, a medium and a message. Failure of any of those components is a failure at communication.

The issue of course is that close-minded PR people will rationalize their problems as some issue related to the medium, and act accordingly, and quite wrongly (they remind me of Father Dougal panicking in “Speed 3” and so resorting to the one thing he knew how to do, celebrating Mass).

In the real world instead, the real communication failure has been at the level of the message. As I wrote in Nov 2008, AGWers have  nothing to show:

for all the huffing and all the puffing, there is very little that AGWers can show to support their claims

This doesn’t necessarily mean AGW is nothing and will have no consequences. What it means is that True Believers behave as if they have yet to understand what the issue is about, and keep reverting to type in the face of absolute cluelessness:

they use the tools learned to protect pandas or clean up the Hudson river. And for most intents and purposed, they fail: because, as Revkin has realized, Anthropogenic Global Warming, aka Climate Change, truly is a completely different beast

Expect plenty of claims for the foreseeable future then, about this or that phenomenon as evidence of global warming or climate change. Luckily though, due to the intrinsically inflationary nature of their approach, everything they say will quickly lose in importance.

Live Blogging From RGS Geoengineering Debate In London

I am at the Royal Geographical Society debate on geoengineering, with Paul Johnston from Greenpeace and Prof. David Keith, one of the world’s authorities on geoengineering as a way to counteract climate change.

So far Johnston has expressed a heavy does of skepticism on any technology for intervening in the climate. Keith is not making a strong case against the list of issues working against geoengineering, such as the possibility that will be used independently or even as some sort of weapon.

Update: Keith is now moving towards asking to know even if nobody will do any intervention immediately. Johnston replies that money is limited and geoengineering may take it away from “real solutions”

Update 2: Tom Clarke, chair, comes to the rescue asking if there is any alternative given the lack of prospect for any emission reduction. Johnstone says that geoengineering may bring instability when things will be going very badly.

Update 3: Time for questions. First is about the problem of definition of geoengineering. Keith says there are two kinds, solar radiation management and CO2 removal, they are different things.

Update 4: Question on CO2 extraction. Keith is working about it. Scrubbing from the air or from the power plant? First option means you can build it where it is cheaper to build.

Update 5: What is the solution if Greenpeace is so against geoengineering? Johnston wants a much more thorough understanding of the way the atmosphere will react before going the geoengineering route.

Update 6: Keith says if we were really serious on cutting emissions we would be cutting it more aggressively. It is a moral choice, if we cannot cut geoengineering the way forward. Keith affirms he has big concerns too and talks about them,

Update 7: Scientists says he’s terrified about methane in the Arctic: is Greenpeace willing to live with that risk? Other question: geoengineering looks often like a local intervention like seeding clouds: we should expect to be struggling with the difficulty of understanding it all. Johnston talks about huge uncertainties, “at the moment is a gamble”. Keith on intractability: it’s a hard problem. Some of the schemes may be harder. Must start with little interventions and then proceed with the understanding.

Update 8: Keith mentions how after 9/11 we have learned about the effects of airplanes as we had them all grounded over the USA. Yes it is hard, but we cannot do much on the emissions side. We need to do some research on geoengineering.

Clarke asks Johnston if Greenpeace would agree on “free” and “cheap” experiments in geoengineering. Answer is that they need assurance that it will not prevent “the full deployment of an alternative energy [generation] system”

Update 9: Johnston doesn’t want to see commercial interests involved as in the ocean fertilization debacle. Keith agrees.

Final two questions: since we cannot predict what can happen, can we use the 200+ volcanic eruptions to understand better? Also large-scale or small-scale projects, such as improving cooking stoves at community level?

Keith talks about the possibility of biofuels (?) especially in the tropics. Johnston says they had been interested about it for years, and that they want to more about it before investing in large-scale interventions. Doesn’t want to see it as a way to deal with biological waste.

Update 9: Final final two questions. Won’t the politicians think short term and choose geoengineering to avoid having to deal with cutting emissions? Don’t we need research just to start an informed debate about geoengineering, instead of having to deal over and over with uncertainties that never go away? Isn’t much of the technology already available right now? Can we use geoengineering as the “nasty medicine” to scare the politicians into doing something about emissions?

Johnston doesn’t think it would work as a “stick”. He says we need a good reason and guidelines for carrying out geoengineering research and “throwing money” at it. Talks about avoiding unjustified optimism.

Update 10: Johnston suggests to go for research without immediate commercial exploitability. It’s now Keith’s turn: nobody is doing anything serious about emissions, even in high-rhetoric Europe. He says that not enough people have been convinced. He doesn’t “know why”, doesn’t “get it”. “We just haven’t made the sale” to the politicians so they are not serious about global warming.

Keith continues saying GM food are a not-so-serious problem for the experts but the public is very worried about it. For climate change, it’s the other way around.

Johnston thinks it’s difficult to people to conceive the scale of global warming, so they become despondent. Politicians have contributed to the perception that climate change is unavoidable, by doing nothing. People are already starting to adapt.

End of the debate – some more details and considerations will be posted later

How I Learned to Stop Worrying and Love the Climate Change

(yes, it has already been used: here, here, here, here, here)

Will human civilization survive the giant climate shifts that will be caused by our SUVs (or by any other cardinal sin brought about by the comforts of modern life)? And what about humanity?

Who knows?

But one thing I am now more sure of. The biosphere will do just fine. Plenty of animals and plants and bacteria and archeas and viruses will prosper if the world will get warmer, if it will get cooler, or if it will continue as before (whatever the meaning of “continue as before” is).

And it’s all written loud and clear in scientific, peer-reviewed literature. For example:

Jeffrey P. Severinghaus and Edward J. Brook, “Abrupt Climate Change at the End of the Last Glacial Period Inferred from Trapped Air in Polar Ice“, Science, 29 October 1999: Vol. 286. no. 5441, pp. 930 – 934 DOI: 10.1126/science.286.5441.930 (Abstract)

The last glacial period was terminated by an abrupt warming event in the North Atlantic ~15,000 years before the present, and warming events of similar age have been reported from low latitudes […] the Greenland Summit warmed 9 ± 3°C over a period of several decades, beginning 14,672 years ago […]

Jørgen Peder Steffensen et al., “High-Resolution Greenland Ice Core Data Show Abrupt Climate Change Happens in Few Years“, originally published in Science Express on 19 June 2008, Science 1 August 2008: Vol. 321. no. 5889, pp. 680 – 684 DOI: 10.1126/science.1157707 (Abstract, free Full Text)

The last two abrupt warmings at the onset of our present warm interglacial period, interrupted by the Younger Dryas cooling event, were investigated at high temporal resolution from the North Greenland Ice Core Project ice core […] A northern shift of the Intertropical Convergence Zone could be the trigger of these abrupt shifts of Northern Hemisphere atmospheric circulation, resulting in changes of 2 to 4 kelvin in Greenland moisture source temperature from one year to the next.

Let’s also keep in mind that 8 ice ages and 8 warm ages have happened during the last 800,000 years.

What can we conclude?

  1. Abrupt climatic changes happen quite often
  2. There is a sizable amount of evidence of climate changes more abrupt than anything experienced in recorded human history. In other words, present-day temperature changes are neither special nor unprecedented
  3. All existing species have gone through several rounds of those abrupt climatic changes. ADDENDUM: And since there is no evidence for periodic widespread extinction episodes linked in any way to the changes in climate, we can rest assured that the overwhelming majority of species adapt to cooler and warmer environments
  4. With or without humanity, another climate change is bound to happen. And another. And another. (etc etc)

Hence, there is very little sense in all the cries about global warming being the destroyer of life on Earth, or of any species in particular.

Note that Humanity itself has survived everything that has been thrown at it. If anybody is seriously worried, rather than overcomplicated and resultless negotiations on carbon emissions, they should dedicate all their efforts to mantaining civilization (=adaptation).

And if we take the LIA into account: who can seriously think that present-day humanity has feebler defences than 1650’s?

October Snow in London

The BBC is forecasting a sunny, cloudy, rainy, snowy day for Oct 29 in London, UK.  Guess that’ll make it very difficult for such a forecast to be wrong.

But how often has it snowed in October in relatively mild England? From the Hollinsclough website:

1762, 1783, 1784, 1785, 1825, 1829, 1836, 1838, 1880, 1885, 1888.

Those values are confirmed at Netweather.tv.

Another website indicates snow in London on Oct 29 in 1922, and other episodes in England in 1925, 1926, 1934 (as snow showers), 1950, 1964, 1974, 1992, 2000.

Taking all the above as “true”, the average wait is 12.5 years (stdev: 13.1). A snowfall in two days’ time would therefore be not exceptional, really.

Also, there is no much sign of a warming either. The ongoing average has been between 10.8 and 15.75 years since 1825.

OCT 29 UPDATE: It actually did snow in London, but not where I live so I will proceed to shrug it off as a non-event 😎 . No, really: the BBC and the Evening Standard reported it as the first London snow in October since 1934: I suspect the actual date depends on the definition of “London”.

Response to Zombie Blog (Greenfyre’s)

Hello Greenfyre

I certainly support letting everybody perfectly free to use their own definitions. As long as it is clear what they are talking about.

That 1961 New York meeting I have blogged about, was sponsored by the American Metereological Association and The New York Academy of Sciences. That should be enough to consider it an important conference. And it was co-chaired by Rhodes W. Fairbridge, not a minor figure in the last 40/50 years of climatology. Furthermore, it was followed by another meeting in Rome, organized by UNESCO and again with major climatologists in attendance (J. Murray Mitchell, Jr. C. C. Wallén , E. Kraus).

Once again in Rome, they all agreed that the world was cooling. The full proceedings are available and I extracted some interesting snippets.

If scientific experts meet once, and then meet again, and there is general agreement among them that the world is cooling, I’d say most people will agree that THAT is evidence for “global cooling scientific consensus”.

I am just using perfectly common and sensible definitions for “cooling”, “global” and “consensus”.

If instead you decide e.g. that “global cooling” has to mean “predicting future cooling”, feel free to do so: but please do yourself a favor and provide reasons for your choice.

Because of course the more we restrict a definition, the less the chance that anything will fall into that category.

This “restricting the definition until there is nothing left” is after all what Thomas C. Peterson, William M. Connolley, and John Fleck have done in their largely mistitled “The Myth of the 1970s Global Cooling Scientific Consensus”.

Definitive Evidence for Global Cooling Consensus in the 1970s (3)

A series of blogs analizing Thomas C. Peterson, William M. Connolley, and John Fleck’s (PCF) largely mistitled “The Myth of the 1970s Global Cooling Scientific Consensus” (Bulletin of the American Meteorological Society Volume 89, Issue 9, September 2008, pp 1325-1337). Previous considerations about a global cooling consensus in the 1960’s can be read here and here.

4 – AN INCOHERENT TIME FRAME

In the previous blogs in the series, we have seen how the very statements made by Thomas C. Peterson, William M. Connolley, and John Fleck’s (PCF) The Myth of the 1970s Global Cooling Scientific Consensuscan be used to demonstrate that there was indeed a global cooling scientific consensus, in the 1970s.

The whole concept of the “myth” is merely based on definitions. Besides, PCF’s own methodology meant disregarding almost everything written about global cooling anyway.

Moreover: they have been cavalier with the temporal series of events.

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What is the meaning of “the 1970’s”? In the “Perpetuating the Myth” Box (page 1326, page 2 in the PDF file), PCF are particularly disingenuous in their criticism of Singer and Avery (2007), Balling (1992), Giddens (1999), Michaels (2004) and pretty much everybody else.

From PCF’s own analysis, in fact, one can distinguish two eras, with a “cooling consensus” up to 1975:

PCF: “Indeed, the Earth appeared to have been cooling for more than 2 decades when scientists first took note of the change in trend in the 1960s. The seminal work was done by J. Murray Mitchell [in 1963, showing that] global temperatures had increased fairly steadily from the 1880s, the start of his record, until about 1940, before the start of a steady multidecade cooling (Mitchell 1963). By the early 1970s, when Mitchell updated his work (Mitchell 1972), the notion of a global cooling trend was widely accepted, albeit poorly understood.

The first satellite records showed increasing snow and ice cover across the Northern Hemisphere from the late 1960s to the early 1970s. This trend was capped by unusually severe winters in Asia and parts of North America in 1972 and 1973 (Kukla and Kukla 1974),which pushed the issue into the public consciousness (Gribbin 1975). The new data about global temperatures came amid growing concerns about world food supplies, triggering fears that a planetary cooling trend might threaten humanity’s ability to feed itself (Thompson 1975).

The start of the “warming” era is placed by PCF around 1976:

PCF: “It was not long, however, before scientists teasing apart the details of Mitchell’s trend found that it was not necessarily a global phenomenon.Yes, globally averaged temperatures were cooling, but this was largely due to changes in the Northern Hemisphere. A closer examination of Southern Hemisphere data revealed thermometers heading in the opposite direction (Damon and Kunen 1976).

Therefore, according to PCF themselves, scientists up to 1975 would have mostly agreed that the world was cooling. What is wrong then in stating that global cooling was at the time “scientific verity” (Bray 1991)? “Orthodox scientific opinion” in 1974, that is 25 years before Giddens wrote the text below, was exactly as he described it:

Giddens: “Yet only about 25 or so years ago, orthodox scientific opinion was that the world was in a phase of global cooling.

What one could say is that Singer, Avery, and most of those mentioned in that Box, are as guilty as PCF in viewing the 1970’s with glasses tinted with today’s mindframes (eg exaggerating any mention of “global cooling” into “ice ages”).

But is PCF’s the one truly unmissable statement:

PCF: “Clearly, if a national report in the 1970s advocates urgent action to address global warming, then the scientific consensus of the 1970s was not global cooling.

The U.S. National Research Council report they refer to, is from 1979. How could people know about that report, in 1975?

PCF’s analysis is not temporally sensible.

QED.

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In a lyrical passage, PCF state their research is all the more interesting because it shows the emerging in the 1970s of “the integrated tapestry that created the basis for climate science as we know it today“. That’s a myth in its own right, and the topic for the next blog in the series.

(continues…)

Definitive Evidence for Global Cooling Consensus in the 1970s (2)

A series of blogs analizing Thomas C. Peterson, William M. Connolley, and John Fleck’s (PCF) largely mistitled “The Myth of the 1970s Global Cooling Scientific Consensus” (Bulletin of the American Meteorological Society Volume 89, Issue 9, September 2008, pp 1325-1337). Previous considerations about a global cooling consensus in the 1960’s can be read here and here.

3 – GLOBAL COOLING: PRESENT VS. IMMINENT

In the previous blog in the series, we have seen how the very statements made by Thomas C. Peterson, William M. Connolley, and John Fleck’s (PCF) The Myth of the 1970s Global Cooling Scientific Consensuscan be used to demonstrate that there was indeed a global cooling scientific consensus, in the 1970s.

The whole concept of the “myth” is merely based on definitions. But an even larger issue lies with PCF’s methodology, to the point of showing that despite their claims, they have not done “a review of the climate science literature from 1965 to 1979” looking for a global cooling consensus.

Rather, they have carefully made sure they could find no such a thing, under any circumstance.

PCF: “the literature search was limited to the period from 1965 through 1979. While no search can be 100% complete, this methodology offers a reasonable test of the hypothesis that there was a scientific consensus in the 1970s regarding the prospect of imminent global cooling

Apparently, they have chosen to restrict their interest only to scientific works about future climate prospects (note the slightly different and unexplained definition for “global cooling”, as “the prospect for imminent global cooling”).

But this has meant disregarding all the (ultimately, scientifically right at its time) bibliography about global cooling up to around 1975. In fact: were “projections” of future climates really of much interest to scientists in the 1970s? Not really, as shown by PCF themselves:

PCF: “While some of these articles make clear predictions of global surface temperature change by the year 2000, most of these articles do not. Many of the articles simply examined some aspect of climate forcing.

Most” of the available articles for the chosen period 1965-1979 “do not […] make clear predictions”. Sounds like an apparent article-killing flaw, doesn’t it?

How do you conduct a survey when the subjects are not interested in responding?

And still, PCF decided to move on nevertheless. Where the texts would not reach, PCF’s interpretation will do:

PCF: “However, it was generally accepted that both CO2 and anthropogenic aerosols were increasing. Therefore, for example, articles that estimated temperature increases resulting from doubling CO2 or temperature decreases resulting from anthropogenic aerosols would be listed in Table 1 as warming or cooling articles, respectively. […] Articles were not included in the survey if they examined the climate impacts of factors that did not have a clear expectation of imminent change, such as increases in volcanic eruptions or the creation of large fleets of supersonic aircraft.

This is why we cannot say that PCF have reviewed “the climate science literature from 1965 to 1979”. Simply, they have been looking at 30/40-year-old articles that would ultimately fit today’s patterns: making future climate predictions, and strictly fixated around “forcings”.

There was no chance for them to find many articles about “global cooling”. And they didn’t.

QED.

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PCF’s work is about the 1965-1979 period. One would expect good care to be taken with the time series of events. That’s the topic for the next blog in the series.

(continues…)

Definitive Evidence for Global Cooling Consensus in the 1970s (1)

A series of blogs analizing Thomas C. Peterson, William M. Connolley, and John Fleck’s (PCF) largely mistitled “The Myth of the 1970s Global Cooling Scientific Consensus” (Bulletin of the American Meteorological Society Volume 89, Issue 9, September 2008, pp 1325-1337). Previous considerations about a global cooling consensus in the 1960’s can be read here and here.

1 – INTRODUCTION

In an act of supreme irony, incontrovertible evidence for a “global cooling scientific consensus in the 1970s” is spelled out loud and clear in Thomas C. Peterson, William M. Connolley, and John Fleck’s (PCF) The Myth of the 1970s Global Cooling Scientific Consensus.

How did they manage then to show “global cooling scientific consensus in the 1970s” to be a “myth”?

By carefully adopting their own particular definitions for common words; by using the very “selective misreading of the texts” they accuse others to be guilty of (page 1326); and by using quite uneven criteria, strict regarding “cooling” and “consensus”, and loose on the “warming” side.

In the process, they have ended up discarding or having to liberally interpret most of the available literature. Furthermore, for an article dealing with a particular time period, PCF’s comments do appear temporally jumbled up. And they have created their own myths: the isolation of different types of climate research before the 1970’s, and the sudden appearance of CO2 as a factor affecting climate.

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2- THE SCIENTIFIC CONSENSUS FOR GLOBAL COOLING

What is “global cooling”? At least at the beginning, PCF take it as synonym of “imminent ice age”:

PCF: “There was no scientific consensus in the 1970s that the Earth was headed into an imminent ice age. Indeed, the possibility of anthropogenic warming dominated the peer-reviewed literature even then.

Isn’t that a tad too catastrophist, too “2008”, to say the least?

Couldn’t there have been people in the 1970s convinced of, and worried about global cooling, without necessarily expecting “an imminent ice age”? It’s like trying to look at the past with our thoughts firmly anchored to the present, catastrophiliac era.

And what is a “scientific consensus”? Here’s PCF’s definition:

PCF: “[A global cooling scientific consensus] would be easily shown by both the presence of many articles describing global cooling projections and the absence of articles projecting global warming

So they would be satisfied of a “global cooling scientific consensus” only by “the absence of [scientific] articles projecting global warming”.

But that is an almost impossible feat. Even now in 2008, still there are peer-reviewed articles that do not agree with what is incessantly referred to as the “global warming consensus”.

A more open-minded approach would be to define as “scientific consensus” what most people would consider a “consensus”: having a large majority of scientists thinking global cooling was underway (just as a large majority of scientists think global warming is underway right now).

And that is exactly what PCF describe (referring to the 1972/1974 period):

PCF: “Meanwhile, newly created global temperature series showed cooling since the 1940s.[…] By the early 1970s, when Mitchell updated his work (Mitchell 1972), the notion of a global cooling trend was widely accepted, albeit poorly understood

“Widely accepted”: check. “Global cooling”: check.

So according to PCF, a lowering of global temperatures was indeed the mainstream view in 1972. And up to sometimes in the 1970s at least, the available scientific evidence pointed towards global cooling being a reality.

On the basis of what PCF have written, a “global cooling scientific consensus” did exist in the 1970s, if only for a few years.

QED

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One could still wonder, if there was indeed a “global cooling scientific consensus” in the 1970s, why didn’t PCF find more articles supporting it? That’s the subject of next blog in the series.

(continues…)

Yet More Evidence Of Global Cooling Consensus In 1961

As pointed out by Nigel Calder in a comment to my “Global Cooling Consensus Not A Myth” blog, UNESCO hosted in October 1961 a Symposium on Climate Change.

The Proceedings of that Symposium indicate the existence at the time of a general (mild) consensus about world temperatures getting cooler, thereby confirming what reported by Walter Sullivan in The New York Times at the end of January that very same year. And thereby also further undermining the results of the Peterson, Connolley and Fleck paper “The Myth of the 1970s Global Cooling Scientific Consensus” in the Bulletin of the American Metereological Society.

(Yes: I do know that Peterson et al claim to be referring to the 1970s. However, they did include, or claim to have included, the analysis of all scientific research from 1965 onwards, a mere four years before the Symposium here discussed took place)

======

First of all, many thanks to renowned science popularizer and formed editor of New Scientist Nigel Calder for writing this comment:

In October 1961, following the US meeting you describe, the World Meteorological Organization and UNESCO organized an international Symposium on Changes of Climate, in Rome. The discussions were led by H.H. Lamb of the UK Met Office, who went on to found the Climatic Research Unit at the University of East Anglia.

The dominant theme of the meeting was the threat posed by the all-too-evident global cooling to world food supplies. The proceedings were published by UNESCO (Arid Zone Research Series XX, 1963).

I know all this because I was at that symposium. An advantage of old age in this subject is to know just how often the global warmers try to rewrite history, in the Orwellian way.

From Mr Calder’s information, I have managed to find the whole Proceedings of the Symposium on Changes of Climate with Special Reference to Arid Zones online:

CHANGES OF CLIMATE Proceedings of the Rome Symposium organized by Unesco und the World Meteorological Organization – ARID ZONE RESEARCH – XX
Published in 1963 by the United Nations Educational, Scientific and Cultural Organisation

The 473-page PDF is here, for a total of around 45MB.

Admittedly, it is easy to miss something in a document so big, but I am fairly confident the following are the most relevant findings for the present discussion (note that “some 115 scientists from 36 countries took part in the symposium“):

(page numbers in the following refer to the PDF’s, not the original)

(1) At page 182, an intervention by E. Kraus of the Woods Hole Oceanographic Institution, Woods Hole, Mass., U.S.A., commenting a presentation by J. Murray Mitchell Jr. United States Weather Bureau, Washington, D.C.

Perhaps the most interesting part of the evidence presented by Dr. Murray Mitchell, Dr. Rodewald and some of the other speakers is the way in which it falls into a pattern. Not only air temperature, but also subtropical rainfall, the tendency of hurricanes to move along certain tracks or seasurface temperatures, show a reversal of the preceding [warming] climatic trend during the last one or two decades. The true physical signiñcance of Dr. Murray Mitchell’s result lies perhaps in the combined evidence, based on so many different variables.

(2) On the same page, another comment by C. C. Wallén of the Swedish Hydrological and Meteorological Office

I wish also to state how much I agree with Dr. Kraus that this downwards trend in temperature should be considered significant from a physical point of view although it may not be so from a statistical point of view. It certainly renders itself extremely well to studies of the relationship between changes in climate elements on one side and fluctuations in the general circulation

(3) From the presentation mentioned above, at page 162, “On the World-Wide Pattern of Secular Temperature Change” by J. Murray Mitchell Jr.

it has been extremely difficult by this means to avoid the conclusion that the warming trends [up to the 1940s] for the world as a whole, and for the Northern Hemisphere in particular, are truly planetary in scope. On the other hand, it cannot yet be demonstrated in this way beyond a reasonable doubt that the net cooling since the 1940s has likewise been planetary in scope. That this cooling is of such nature, however, seems reasonable and this should be verifiable if the cooling in the data areas were to continue for another decade or two in the future.

(4) C. C. Wallén must have been a scientist of repute, as he was asked to take care of the concluding lecture for the Symposium, “Aims and Methods in Studies of Climatic Fluctuations” (page 449), that included this:

All authors have been able to show, by using records dating back to the end of the eighteenth century that the warming up of large parts of the world from the middle of the nineteenth century until recently has been statistically significant. However, as pointed out especially by J. M. Mitchell and also shown for sea temperatures by M. Rodewald this increase in temperature has recently declined. The decreasing trend is significant if we consider the last 20-50 years or even further back but may lose most of its significance by applying several of the statistical methods commonly used to show fluctuations during a longer period.

There we have it then: several speakers presenting work on “a reversal of the preceding [warming] climatic trend” about which everybody atteding the Symposium appeared to be “physically” sure but “statistically” less certain. Still, they thought it reasonable for that aspect to be considered valid too.

Is that enough for a “global cooling consensus”? I think it is.

Global Cooling Consensus Not A Myth

Timely but alas flawed contribution by Thomas Peterson of NOAA, William Connolley of the British Antarctic survey and science reporter John Fleck, reporting on the “Bulletin of the American Meteorological Society” about the apparent lack of peer-reviewed papers predicting global cooling, between 1965 and 1979 (it’s reported here in Nature’s Climate Feedback blog).

Unfortunately, it really does look like Messrs Peterson, Connolley and Fleck simply have not looked well enough… or have conveniently restricted their search just enough to miss a 1961 article describing a Global Cooling consensus among scientists at a meeting supported also by…the American Metereological Association.

The article, written by Walter Sullivan for The New York Times (cited by Peterson et al. for his 1975 climate-related articles), refers to a 5-day Conference co-chaired by Rhodes W. Fairbridge of Columbia University and Charles G. Knudsen of the United States Weather Bureau, in the January of 1961.

Perhaps the AMA’s own archives could clarify what climatologists exactly talked about at the time.

Notably, the 1961 Conference is described as as varied and multidisciplinary as any today. And yes, scientists at the time were aware of the “greenhouse effect” of carbon dioxide.

UPDATE OCT 10: Nigel Calder’s comment was particularly interesting, so I managed to find online the Proceedings of the 1961 UNESCO Symposium he was referring to. The contents do appear to indicate a global cooling consensus, as suggested, that was important enough to be mentioned in the concluding Lecture.

Global Cooling Consensus in the Past: the Evidence

Much has been written both in favor and against the notion that in the 1970’s, the consensus among climatologists was that “global cooling” was on its way (strangely, foretelling similar disasters as with “global warming” nowadays, including refugees in the millions, crop failures, droughts and extreme weather throughout).

So far the evidence is inconclusive, so perhaps there was not really a consensus, in the 1970’s, as much as a willingness for news media to latch on anything mentioning refugees in the millions, crop failures, etc etc (thereby explaining why global warming has vastly beaten Pamela Anderson in popularity).

Here’s a little new contribution then: global cooling consensus from 1961.

SCIENTISTS AGREE WORLD IS COLDER; But Climate Experts Meeting Here Fail to Agree on Reasons for Change – By WALTER SULLIVAN
January 30, 1961, Monday – Section: BUSINESS FINANCIAL, Page 46, 1326 words
The New York Times
After a week of discussions on the causes of climate change, an assembly of specialists from several continents seems to have reached unanimous agreement on only one point: it is getting colder

For those with no access to Times Select: Sullivan was reporting about a weeklong meeting of “specialists from several continents” reaching “unanimous agreement on only one point: it is getting colder“. Techniques at the time included “observation with earth satellites“, “palinology” (pollen studies), “dendrochronology” (tree rings’) and “the deciphering of ancient oriental scripts“.

So it appears the one thing we have lost, 47 years later, is those “oriental scripts”…

Theories presented were about “celestial mechanics“, “changes in the transparency of the atmosphere“, “changes in the sun” and a cycle of ice/no-ice conditions in the Arctic. Note how nobody tried to blame humans: this was before 1968, the year leftist thought lost its hope on humanity along with Martin Luther King, Jr. and Bobby Kennedy.

Sullivan does mention greenhouse gases, but also studies from Sweden, the USA and the USSR that “would seem to weaken the contention that industrial smoke can alter the climate“.

——–

One wonders now if there’s ever been a climatology conference where the participants reached the one missing consensus: that about a “global thermostat keeping the climate as it’s ever been”.