Excuse #52 for 'the pause' in global warming – natural climate variability as secular trends

Earlier we added this to the list, now here is the description of the excuse. Basically what they are saying is that natural climate variability has overtaken the posited powerful effects of CO2 on climate.

From the EU’s JOINT RESEARCH CENTRE Last decade’s slow-down in global warming enhanced by an unusual climate anomaly:

A hiatus in global warming ongoing since 2001 is due to a combination of a natural cooling phase, known as multidecadal variability (MDV) and a downturn of the secular warming trend. The exact causes of the latter, unique in the entire observational record going back to 1850, are still to be identified, according to a JRC article which analysed the phenomena.

The earth hasn’t warmed at the same pace during the 20th century. The noticeable temperature increases during some periods interspersed with fairly stable or decreasing levels during others have been explained as a combination of secular global warming (likely manmade) and natural climate variability. We are currently, in the early 21st century, experiencing a hiatus period, during which surface temperatures have not risen at the same rate as higher atmospheric radiative forcing.

JRC scientists analysed surface temperature data records – which began in 1850 – to separate natural variations from secular (i.e., long-term) trends. They identified three hiatus periods (1878-1907, 1945-1969 and 2001 to date), during which global warming slowed down. These hiatus periods coincide with natural cooling phases – the multidecadal variability (MDV), most likely caused by natural oceanic oscillations. The scientists therefore conclude that the MDV is the main cause of these hiatus periods during which global warming decelerated.

jrc-graph-global-temperature-anomalies-640
HadCRUT4 Temperature Anomaly 1850-2013 (°C) (blue and red bars). Secular trend (red line), multidecadal variability (green line) and reconstructed signal from the statistical analysis (black line). Hiatus periods are indicated with grey bars in the x-axis. © EU, 2014

However, they found that the current hiatus period is, for the first time, particularly strongly influenced by changes in the secular trend, which shows a strong acceleration from 1992-2001 and a deceleration from 2002 to 2013. Such rapid and strong fluctuations in the secular warming rate are unprecedented.

This unique fluctuation in the recent secular warming rate could have several causes, such as recent changes in the tropical Pacific Ocean, the accelerated melting of Arctic ice, changes in the deep ocean heat storage or the increasing content of aerosols in the stratosphere. The authors recommend further scientific investigation of the causes and consequences of this change, in order to address whether the global climate sensitivity has recently changed. Such research is crucial to understanding current climate conditions and creating plausible scenarios of future climate evolution.

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SIGINT EX
September 11, 2014 7:28 pm

Nobody lives on the “secular trend” [!] [in the figure above] an allusion to a phrase, “nobody lives at the Federal Level of Law. Rather, everybody lives at the LOCAL level of Law.
Niner Niner Niiiiiiiiiiner. 😉

September 11, 2014 7:33 pm

Secular ?( Climatology speak, for Model output?)
As opposed to what? An act of GOD?
If so which GOD is to blame for the ignorance and arrogance of these bureaucrats?
Seriously what a puff piece.
Why not tell the truth; “We are without a clue”
I do not know, words Climatologists of Team ScienceTM IPCC, dare not speak?
By the logic of this “reconstruction” the warmer an cooler periods of the past, were caused by..?
Obviously anything that occurred outside the green line of multidecadal variability, must have been caused by these secular forces.
So what secular activities caused the Medieval warm period?
The little ice age?
This farce is not going to end well for this pseudo science.

urederra
Reply to  john robertson
September 11, 2014 10:38 pm

Dunno, but over here secular is latin for “century long”. I have the impression that you guys have a different meaning in mind.
Anyway, another step back from alarmist claims and they will be defending the same position as the skeptics.

Harry Passfield
Reply to  urederra
September 12, 2014 3:57 am

According to the Oxford Dictionaries, secular:

Astronomy: Of or denoting slow changes in the motion of the sun or planets.
– or –
Occurring once every century or similarly long period (used especially in reference to celebratory games in ancient Rome).

Jim Francisco
Reply to  john robertson
September 12, 2014 9:23 am

I hope to live long enough to see it. I am 62.

Eve
September 11, 2014 7:39 pm

I was born close to the beginning of the cooling period. I didn’t know it was a cooling period then but by my teens I did. Knowing that we had had 30 years of warming before I expected that the cooling period would end and we would have warming again. We did. I didn’t get my whole 30 years of warming but I did expect another cooling period and it is here. What part of this did the climate scientists not understand?

Pamela Gray
September 11, 2014 7:39 pm

Say what??? Current natural variability is unprecedented? Try to explain that one to frozen mammoths.

nielszoo
Reply to  Pamela Gray
September 12, 2014 11:57 am

+1

Shawn from High River
September 11, 2014 7:40 pm

This piece has the word “unprecedented” in it. Then mentions ‘recent changes in the tropical Pacific Ocean, the accelerated melting of Arctic ice, changes in the deep ocean heat storage or the increasing content of aerosols in the stratosphere. ‘
So now its multiple excuses wrapped up in one

poitsplace
September 11, 2014 7:51 pm

Hey, I remember being called a “denier” for using a chart like that. I’m guessing many here had that experience

September 11, 2014 7:52 pm

What are the number of watts that are supposed to be kept in by the greenhouse effect of each of the various gases? And mans portion? I see it expressed as temperature all the time. Which is unprecedented!!!

uk(us)
September 11, 2014 7:52 pm

It’s a fundraiser.

TYoke
September 11, 2014 7:56 pm

I see that the “secular trend” caused a REDUCTION in temperature from 1850 to 1880. How does that happen? According to the authors “secular trend” is “human induced” so apparently humans were doing something between 1850 and 1880 to cause the temperature to go DOWN.

E.M.Smith
Editor
Reply to  TYoke
September 12, 2014 10:07 am

IMHO, there’s a lunar driven 1500 year cycle ( found by others in published papers) that has ‘nodes’ at 1/2 and 1/4 cycle ( so about 750 and 375 ish years). This can have variation (one paper finds it bimodal at about 1200 and 1800 years with only a 1470 year average), but the trends recur. I came to this from looking at history…
http://chiefio.wordpress.com/2011/02/22/intermediate-period-half-bond-events/
There are regular historical records of famines, wars, migrations, civilization collapses. They tend to be worse at about the 1500 year period, moderate at 1/2 period, and still present in modest form at the 1/4 period. IMHO, the LIA was a 1/2 period event (from the 1.4 KYA Bond Event 1, so at about 700 YA or 1300… which is about the onset.)
http://chiefio.wordpress.com/2012/08/17/great-famine-of-1315-vs-the-sun/
That would make the turn of the cold end of the 1/4 event about 1675 ( it got warm into 1720 ish then cold to about 1880) which is inside the error bands of 1850 for a cold phase. With a “top” for both the 1/4 even and 1/2 event cycles at about 2000 to 2075. Oddly, that would also be the top of the 1500 year cycle (last onset was 540 AD or so, which makes it about 2010 if you use the 1470 nominal average Bond Event period or about 2040 if you use a rougher 1500 years).
Now I dearly hope I am very very wrong in this. It does line up with Habibulo’s prediction of 2020-2040 being very cold. It does line up with some lunar cycle data from Keeling & Worf. It lines up with other cyclical measures. BUT, if accurate, we have a long long cold run ahead of us as things head to the deep bottom.
We can hope that this is an 1800 year period.
“But hope is not a strategy. -E.M.Smith”….
So just take their “secular” with a ton of salt and remember it could just be a longer cycle…

c. Parson
Reply to  TYoke
September 12, 2014 3:40 pm

Maybe they left their refrigerator doors open… Just saying

September 11, 2014 8:02 pm

TYoke: It’s a typo. The ‘s’ is supposed to be a ‘p’ and they left out an ‘i’… ‘peculiar trend’

September 11, 2014 8:06 pm

Secular: “going on from age to age; continuing through long ages” as in “Long Term Trend”. Of course if we pick different end points … Of to watch football. At least with football, you know the result after a predetermined period. Usually.

Reply to  Wayne Delbeke
September 11, 2014 11:25 pm

The game is rigged there, too.

NZ Willy
September 11, 2014 8:10 pm

Maybe “secular” comes from the Roman Secular holiday, held every 110 years IIRC.

Ashby Manson
September 11, 2014 8:18 pm

They’re making a slow turn, like an ocean liner. Gradually all the grants will flip to studying natural variability. Then maybe we’ll be able to hear the full story with less spin. But not until the grants are properly lined up.

Tim
Reply to  Ashby Manson
September 11, 2014 9:11 pm

They can’t tax natural variability.

Reply to  Tim
September 11, 2014 9:57 pm

That is not the same as “they won’t try at least to tax it.” Just think of the coming cooldown and a tax on carbon emissions. For the Left its, “Screw the little guy just trying to pay his bills, while keeping blame on “Big Oil and evil frackers” so his anger is misdirected.”

Reply to  Tim
September 11, 2014 10:38 pm

Sure they can. They could just say that natural variation is due to human activity and must be paid for.
Their type has no problemo with doublethink.

Jer0me
Reply to  Tim
September 12, 2014 1:04 am

When I was a kid, a pretty standard joke idea was to tax the air we breathe. Obviously we all thought that was impossible.
Go figure…

whiten
Reply to  Tim
September 12, 2014 11:09 am

They can’t tax natural variability.
I think ….Yes they can……Seems like they have got it at last…. No matter how many think otherwise… you can’t have an unnatural tax..:)
As long as it’s natural the possibility exist….but some clever mediocre guys thought they could have gone beyond natural…..and have some extra rip off..:)
sorry just a thought.
cheers

Moto
Reply to  Tim
September 14, 2014 1:53 am

……..they’ll tax natural (plus unnatural, interstellar, galactic, cosmic, micro, nano, mega, milli, and giga) variability one way or another. We have to find a way to replace the lost corporate income tax revenue due to US manufactures moving to places without global warming. 😉

Rud Istvan
September 11, 2014 8:20 pm

This is such nonsense.
How many times has the 1910-1945 warming comparison to 1975-2000 been posted, homogenization warts and all? Every comparison disproves the thesis of this paper with a simple side by side graphic.
WUWT did such a comparison yet again on August 20, 2013, posted as “When somebody hits you…”
Even AR4 said the warming prior to 1960 could have been purely natural variation!
This comeback has been done yet again in a much longer essay concerning the basic AGW IPCC canard in the forthcoming book. With better NOAA graphics, and all the historical footnotes, in order to nail the case ‘dead’. I suspect this canard might still remain a vestigial zombie/vampire despite the garlic, the stake, and the silver crucifix affixed by the book. CAGW ‘warmunists’ do not die easily. Example Mann.
“Lies gallop around the world while truth is still getting its boots on.” Folks, get your boots on, and ride.

Tim Neilson
September 11, 2014 8:25 pm

Hi guys.
I’m not very science-educated so maybe you can help me.
It seems to me like:
They’ve drawn a green line, called it MDV, and said that “most likely” it’s ocean driven i.e. they don’t really know;
They’ve drawn a red line called ST which they say is “likely” human caused i.e. they don’t know;
The combination of MDV and ST seems to track the temperature data they portray fairly well;
But if they don’t know for certain what causes MDV or ST, how did they draw those two lines in the first place? I mean what evidence do they give that those two lines represent anything real, rather than just being reverse engineered from the temperature data so as to create two totally artificial constructs designed to fit temperature rather than evidencing any correlation between anything real and temperature?

Michael P
Reply to  Tim Neilson
September 11, 2014 10:05 pm

Tim,
I think they drew the black line (ST+MDV) to “fit “the temperature record, then drew the green wave (MDV) and tweaked it a bit to get the red line (ST) they wanted. If you notice the green wave turns down more sharply after the last peak than at the two other peaks. All the lines seem to be graphical lines rather than from any data as where MDV and ST+MDV are both near zero about 1945, ST is about -0.15.

Reply to  Michael P
September 13, 2014 11:34 am

The authors Macias et al used the Singular Spectrum Analysis Technique for statistical analysis (See PLOS online September 2014, e107222.) I used simple least squares fitting to get similar results. My fitting function was TA(t) = c0+c1*t+c2*t^2+c3*sin(c4*t+c5) where ci are fitting parameters. ST is represented by the polynomial terms, MDV by the sine term. For completeness, I replaced the polynomial terms by a second sine function: TA(t) = c0*sin(c1*t+c2)+c3*sin(c4*t+c5). This also gives a good fit with periodicities of about 60 and 750 years, respectively. Unfortunately, a period of 750 years is much larger than the time interval of 165 years where data are available. Therefore a Taylor Expansion of the sine to second order is a good approximation. Both fitting functions are the same. So nothing is gained. This kind of analysis cannot tell you, whether the temperature anomaly is man made or not,

LogosWrench
September 11, 2014 8:28 pm

Failed modeling and an inane climate science community, insane politicizing combined with taxpayer theft in hundreds of billions of dollars is what is “unprecedented”.

Alberta Slim
Reply to  LogosWrench
September 12, 2014 4:33 am

AND… the end is not in sight

DMA
September 11, 2014 8:49 pm

“The authors recommend further scientific investigation of the causes and consequences of this change, in order to address whether the global climate sensitivity has recently changed. Such research is crucial to understanding current climate conditions and creating plausible scenarios of future climate evolution.”
Are they saying that the climate sensitivity can change due to natural factors? This seems like a insurmountable dodge. If the climate sensitivity can change, no one is wrong because they got the physics wrong or misunderstood the system. The failed predictions are simply a function of changing sensitivity. This strikes me as an unprecedented attempt to move the goal post.

DeNihilist
September 11, 2014 8:52 pm

What happened to the hockey stick?

Mark Bofill
Reply to  DeNihilist
September 12, 2014 7:02 am

+1

dp
September 11, 2014 8:58 pm

You can’t simultaneously deny historic and present natural variation, blame it for enhancing the runaway heating of the last 150 years and the current pause, fabricate an imaginary secular trend that is independent of natural variation, invent feedbacks that don’t, and massage the temperature record to claim the science supports a future climate catastrophe. The dishonesty is patently obvious yet all this is part of the climate hysteria mix being tossed at the wall like spaghetti in the hopes something will stick.

The Ghost Of Big Jim Cooley
Reply to  dp
September 11, 2014 11:54 pm

You’re so right. But pity them (the warmists). Imagine, for a moment, that it had been warming for the past 15 years – year on year – getting warmer and warmer. Imagine if we (the sceptics) were still saying, ‘It isn’t CO2, it’s caused by [insert favourite]’. Wouldn’t we look foolish? I would be so embarrassed to think that I was hopelessly wrong. I would like to think that I would have been brave enough to admit being wrong. Imagine them squirming when they try to think up yet another excuse. I pity them, because they are human – and can’t admit when they are wrong. What’s sad is that respected scientists cannot admit that something isn’t right, let alone wrong. The longer the ocean liner goes without turning, the more absurd it looks. Science will be so damaged by all of this. I predicted that in 2003 on a BBC forum. I said that the fallout could be so bad, that science may never even recover in my lifetime. If there’s a world-renowned scientist reading this, then I urge you to speak up…for science. IT’S DYING ON ITS FEET.

Margaret Smith
Reply to  The Ghost Of Big Jim Cooley
September 12, 2014 3:27 am

I don’t pity them at all! They’re knowingly ‘stealing’ our money for 25 years and grimly continuing to do so

Doctor Gee
Reply to  The Ghost Of Big Jim Cooley
September 12, 2014 10:22 am

If they don’t turn the ocean liner soon, it will fall off the edge of the earth (or at least that is how they will blame the skeptics when the ship ultimately sails silently over the horizon).

Jimbo
Reply to  The Ghost Of Big Jim Cooley
September 12, 2014 10:35 am

The inability to say the models are crap and the hypothesis was overhyped is their big issue. They will defend it to their graves no mater what surface temps do. I enjoy the squirming though, after all the name calling they are facing shame and they know it.
http://www.metoffice.gov.uk/media/image/j/l/warmingtrend.gif

September 11, 2014 8:58 pm

The thesis that the change in the global surface air temperature is the sum of changes in an anthropogenic signal and natural noise lays in violation of the theory of relativity as demonstrated earlier in this blog; The powers of this “signal” and this “noise” are both nil..

Alan
September 11, 2014 9:00 pm

Translation “We have no idea what is happening, please send more money”

Reply to  Alan
September 12, 2014 1:09 pm

Our scientists have no idea, but theyre willing to study it further on the public’s dime!

September 11, 2014 9:17 pm

EU Joint Research Centre states, “This unique fluctuation in the recent secular warming rate could have several causes, such as recent changes in the tropical Pacific Ocean, the accelerated melting of Arctic ice, changes in the deep ocean heat storage or the increasing content of aerosols in the stratosphere.”
Hmmm..
From 1978~2005, the PDO was in its 30-yr warm cycle, from 1982~1998, there was a rare string of SIX strong/moderate El Nino events in just 16 years (including the 1997/98 Super El Nino), the AMO entered its 30-yr warm cycle in 1994 and the 2nd & 3rd strongest back-to-back solar cycle in 300 years occurred from 1976~1996.
The combination of all these natural climatic events easily accounts for most of the 1980~1998 warming, with CO2 only contributing a small portion of total warming.
Now the reverse is occurring: weak solar cycles since 1996, only 2 El Ninos in the past 16 years, the PDO entered its 30-yr cool cycle in 2005, and the AMO warm cycle is winding down and enters its 30-yr cool cycle around 2020.
Given these realities, It’s not surprising global temp trends have been flat for 18 years and falling for the past 14 years (RSS data), despite 1/3rd of all manmade CO2 emissions since 1750 made over just the last 18 years.
Moreover, the Arctic Ice isn’t “accelerating ice loss”, it’s showing signs of recovery, 0~2000 meters of oceans have only warmed 0.09C since 1948 (3 times less than projected) and the Sea Level Rise rate has fallen 30% over the past 10 years– so much for the “missing heat” buried in the oceans meme….
The CAGW scam is collapsing like house of cards. In 5 years, this silly hypothesis will be laughed at.

Richard M
September 11, 2014 9:31 pm

I think Dr. Syun Akasofu already covered this years ago. Looks a bit like plagiarism to me.
http://wattsupwiththat.com/2013/09/09/syun-akasofus-work-provokes-journal-resignation/

September 11, 2014 9:36 pm

and a deceleration from 2002 to 2013. … the accelerated melting of Arctic ice, …

1) The graphic they supply shows acceleration from 2002 to about 2010.
2) The arctic ice has increased this year, but it is at a low level. Do these blithering idiots know the difference between a value and its derivative? Acceleration is the derivative of the derivative. Wrong squared. Or are they morally something much worse than idiots?

Scute
September 11, 2014 9:45 pm

As others have pointed out, Akasofu was saying this and ostracised for it. Dana kept banging on about needing a mechanism for it to be acceptable as if pointing out a correlation for further study was a crime:
“In order for this to be a physically sound argument, Akasofu must explain the physical mechanism behind the “LIA recovery”, and why this 0.5°C global warming trend continues to persist. What is the underlying cause? Surely a geophysicist will examine this question.”
From this SKS link:
http://www.skepticalscience.com/lessons-from-past-climate-predictions-akasofu.html

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